feat: resolve duplicate sibling names with incrementing suffixes

Instead of bailing when children have duplicate filesystem names,
syncback now resolves collisions by appending incrementing suffixes
(e.g. Foo, Foo1, Foo2). This handles both init-renamed children and
any other name collisions. Meta stem derivation is now path-based
to correctly handle collision suffixes and dotted names.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.dir-locals.el

@@ -0,0 +1,2 @@
+((nil . ((eglot-luau-rojo-project-path . "plugin.project.json")
+         (eglot-luau-rojo-sourcemap-enabled . 't))))

.editorconfig

@@ -24,3 +24,6 @@ insert_final_newline = true
 
 [*.lua]
 indent_style = tab
+
+[*.luau]
+indent_style = tab

.git-blame-ignore-revs

@@ -0,0 +1,2 @@
+# stylua formatting
+0f8e1625d572a5fe0f7b5c08653ff92cc837d346

.gitattributes

@@ -0,0 +1 @@
+*.lua linguist-language=Luau

.github/FUNDING.yml

@@ -1 +0,0 @@
-patreon: lpghatguy

.github/workflows/changelog.yml

@@ -0,0 +1,23 @@
+name: Changelog Check
+
+on:
+  pull_request:
+    types: [assigned, opened, synchronize, reopened, labeled, unlabeled]
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Check Actions
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Changelog check
+      uses: Zomzog/changelog-checker@v1.3.0
+      with:
+        fileName: CHANGELOG.md
+        noChangelogLabel: skip changelog
+        checkNotification: Simple
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/ci.yml

@@ -12,32 +12,28 @@ on:
 jobs:
   build:
     name: Build and Test
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
 
     strategy:
       matrix:
-        rust_version: [stable, 1.58.1]
+        os: [ubuntu-22.04, windows-latest, macos-latest, windows-11-arm, ubuntu-22.04-arm]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
+      with:
+        submodules: true
 
     - name: Install Rust
-      uses: actions-rs/toolchain@v1
+      uses: dtolnay/rust-toolchain@stable
-      with:
-        toolchain: ${{ matrix.rust_version }}
-        override: true
-        profile: minimal
 
-    - name: Setup Foreman
+    - name: Restore Rust Cache
-      uses: Roblox/setup-foreman@v1
+      uses: actions/cache/restore@v4
       with:
-        token: ${{ secrets.GITHUB_TOKEN }}
+        path: |
-
+          ~/.cargo/registry
-    - name: Install packages
+          ~/.cargo/git
-      run: |
+          target
-        cd plugin
+        key: ${{ matrix.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-        wally install
-        cd ..
 
     - name: Build
       run: cargo build --locked --verbose
@@ -45,33 +41,93 @@ jobs:
     - name: Test
       run: cargo test --locked --verbose
 
-  lint:
+    - name: Save Rust Cache
-    name: Rustfmt and Clippy
+      uses: actions/cache/save@v4
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ matrix.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+  msrv:
+    name: Check MSRV
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
+      with:
+        submodules: true
 
     - name: Install Rust
-      uses: actions-rs/toolchain@v1
+      uses: dtolnay/rust-toolchain@1.88.0
+
+    - name: Restore Rust Cache
+      uses: actions/cache/restore@v4
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+    - name: Build
+      run: cargo build --locked --verbose
+
+    - name: Save Rust Cache
+      uses: actions/cache/save@v4
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+  lint:
+    name: Rustfmt, Clippy, Stylua, & Selene
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: true
+
+    - name: Install Rust
+      uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: stable
-        override: true
         components: rustfmt, clippy
 
-    - name: Setup Foreman
+    - name: Restore Rust Cache
-      uses: Roblox/setup-foreman@v1
+      uses: actions/cache/restore@v4
       with:
-        token: ${{ secrets.GITHUB_TOKEN }}
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 
-    - name: Install packages
+    - name: Setup Rokit
-      run: |
+      uses: CompeyDev/setup-rokit@v0.1.2
-        cd plugin
+      with:
-        wally install
+        version: 'v1.1.0'
-        cd ..
+
+    - name: Stylua
+      run: stylua --check plugin/src
+
+    - name: Selene
+      run: selene plugin/src
 
     - name: Rustfmt
       run: cargo fmt -- --check
 
     - name: Clippy
       run: cargo clippy
+
+    - name: Save Rust Cache
+      uses: actions/cache/save@v4
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}

.github/workflows/release.yml

@@ -8,53 +8,39 @@ jobs:
   create-release:
     name: Create Release
     runs-on: ubuntu-latest
-    outputs:
-      upload_url: ${{ steps.create_release.outputs.upload_url }}
     steps:
+      - uses: actions/checkout@v4
       - name: Create Release
-        id: create_release
-        uses: actions/create-release@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
+        run: |
-          tag_name: ${{ github.ref }}
+          gh release create ${{ github.ref_name }} --draft --verify-tag --title ${{ github.ref_name }}
-          release_name: ${{ github.ref }}
-          draft: true
-          prerelease: false
 
   build-plugin:
     needs: ["create-release"]
     name: Build Roblox Studio Plugin
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
-
-      - name: Setup Foreman
-        uses: Roblox/setup-foreman@v1
         with:
-          token: ${{ secrets.GITHUB_TOKEN }}
+          submodules: true
 
-      - name: Install packages
+      - name: Setup Rokit
-        run: |
+        uses: CompeyDev/setup-rokit@v0.1.2
-          cd plugin
+        with:
-          wally install
+          version: 'v1.1.0'
-          cd ..
 
       - name: Build Plugin
-        run: rojo build plugin --output Rojo.rbxm
+        run: rojo build plugin.project.json --output Rojo.rbxm
 
       - name: Upload Plugin to Release
-        uses: actions/upload-release-asset@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
+        run: |
-          upload_url: ${{ needs.create-release.outputs.upload_url }}
+          gh release upload ${{ github.ref_name }} Rojo.rbxm
-          asset_path: Rojo.rbxm
-          asset_name: Rojo.rbxm
-          asset_content_type: application/octet-stream
 
       - name: Upload Plugin to Artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Rojo.rbxm
           path: Rojo.rbxm
@@ -67,15 +53,25 @@ jobs:
         # https://doc.rust-lang.org/rustc/platform-support.html
         include:
           - host: linux
-            os: ubuntu-20.04
+            os: ubuntu-22.04
             target: x86_64-unknown-linux-gnu
             label: linux-x86_64
 
+          - host: linux
+            os: ubuntu-22.04-arm
+            target: aarch64-unknown-linux-gnu
+            label: linux-aarch64
+
           - host: windows
             os: windows-latest
             target: x86_64-pc-windows-msvc
             label: windows-x86_64
 
+          - host: windows
+            os: windows-11-arm
+            target: aarch64-pc-windows-msvc
+            label: windows-aarch64
+
           - host: macos
             os: macos-latest
             target: x86_64-apple-darwin
@@ -91,72 +87,64 @@ jobs:
     env:
       BIN: rojo
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
-
+        with:
-      - name: Get Version from Tag
+          submodules: true
-        shell: bash
-        # https://github.community/t/how-to-get-just-the-tag-name/16241/7#M1027
-        run: |
-          echo "PROJECT_VERSION=${GITHUB_REF#refs/tags/v}" >> $GITHUB_ENV
-          echo "Version is: ${{ env.PROJECT_VERSION }}"
 
       - name: Install Rust
-        uses: actions-rs/toolchain@v1
+        uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: stable
+          targets: ${{ matrix.target }}
-          target: ${{ matrix.target }}
-          override: true
-          profile: minimal
 
-      - name: Setup Foreman
+      - name: Restore Rust Cache
-        uses: Roblox/setup-foreman@v1
+        uses: actions/cache/restore@v4
         with:
-          token: ${{ secrets.GITHUB_TOKEN }}
+          path: |
-
+            ~/.cargo/registry
-      - name: Install packages
+            ~/.cargo/git
-        run: |
+            target
-          cd plugin
+          key: ${{ matrix.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-          wally install
-          cd ..
 
       - name: Build Release
-        run: cargo build --release --locked --verbose
+        run: cargo build --release --locked --verbose --target ${{ matrix.target }}
-        env:
-          # Build into a known directory so we can find our build artifact more
-          # easily.
-          CARGO_TARGET_DIR: output
 
-          # On platforms that use OpenSSL, ensure it is statically linked to
+      - name: Save Rust Cache
-          # make binaries more portable.
+        uses: actions/cache/save@v4
-          OPENSSL_STATIC: 1
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ matrix.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 
-      - name: Create Release Archive
+      - name: Generate Artifact Name
         shell: bash
+        env:
+          TAG_NAME: ${{ github.ref_name }}
+        run: |
+          echo "ARTIFACT_NAME=$BIN-${TAG_NAME#v}-${{ matrix.label }}.zip" >> "$GITHUB_ENV"
+
+      - name: Create Archive and Upload to Release
+        shell: bash
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           mkdir staging
 
           if [ "${{ matrix.host }}" = "windows" ]; then
-            cp "output/release/$BIN.exe" staging/
+            cp "target/${{ matrix.target }}/release/$BIN.exe" staging/
             cd staging
-            7z a ../release.zip *
+            7z a ../$ARTIFACT_NAME *
           else
-            cp "output/release/$BIN" staging/
+            cp "target/${{ matrix.target }}/release/$BIN" staging/
             cd staging
-            zip ../release.zip *
+            zip ../$ARTIFACT_NAME *
           fi
 
-      - name: Upload Archive to Release
+          gh release upload ${{ github.ref_name }} ../$ARTIFACT_NAME
-        uses: actions/upload-release-asset@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          upload_url: ${{ needs.create-release.outputs.upload_url }}
-          asset_path: release.zip
-          asset_name: ${{ env.BIN }}-${{ env.PROJECT_VERSION }}-${{ matrix.label }}.zip
-          asset_content_type: application/octet-stream
 
       - name: Upload Archive to Artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
-          name: ${{ env.BIN }}-${{ env.PROJECT_VERSION }}-${{ matrix.label }}.zip
+          path: ${{ env.ARTIFACT_NAME }}
-          path: release.zip
+          name: ${{ env.ARTIFACT_NAME }}

.gitignore

@@ -10,11 +10,8 @@
 /*.rbxl
 /*.rbxlx
 
-# Test places for the Roblox Studio Plugin
+# Sourcemap for the Rojo plugin (for better intellisense)
-/plugin/*.rbxlx
+/sourcemap.json
-
-# Packages for the Roblox Studio Plugin
-/plugin/*Packages
 
 # Roblox Studio holds 'lock' files on places
 *.rbxl.lock
@@ -22,3 +19,10 @@
 
 # Snapshot files from the 'insta' Rust crate
 **/*.snap.new
+
+# Macos file system junk
+._*
+.DS_STORE
+
+# JetBrains IDEs
+/.idea/

.gitmodules

@@ -0,0 +1,18 @@
+[submodule "plugin/Packages/Roact"]
+	path = plugin/Packages/Roact
+	url = https://github.com/roblox/roact.git
+[submodule "plugin/Packages/Flipper"]
+	path = plugin/Packages/Flipper
+	url = https://github.com/reselim/flipper.git
+[submodule "plugin/Packages/Promise"]
+	path = plugin/Packages/Promise
+	url = https://github.com/evaera/roblox-lua-promise.git
+[submodule "plugin/Packages/t"]
+	path = plugin/Packages/t
+	url = https://github.com/osyrisrblx/t.git
+[submodule "plugin/Packages/TestEZ"]
+	path = plugin/Packages/TestEZ
+	url = https://github.com/roblox/testez.git
+[submodule "plugin/Packages/Highlighter"]
+	path = plugin/Packages/Highlighter
+	url = https://github.com/boatbomber/highlighter.git

.vscode/extensions.json

@@ -0,0 +1,8 @@
+{
+  "recommendations": [
+    "JohnnyMorganz.luau-lsp",
+    "JohnnyMorganz.stylua",
+    "Kampfkarren.selene-vscode",
+    "rust-lang.rust-analyzer"
+  ]
+}

.vscode/settings.json

@@ -0,0 +1,4 @@
+{
+  "luau-lsp.sourcemap.rojoProjectFile": "plugin.project.json",
+  "luau-lsp.sourcemap.autogenerate": true
+}

CONTRIBUTING.md

@@ -15,12 +15,29 @@ You'll want these tools to work on Rojo:
 
 * Latest stable Rust compiler
 * Latest stable [Rojo](https://github.com/rojo-rbx/rojo)
-* [Foreman](https://github.com/Roblox/foreman)
+* [Rokit](https://github.com/rojo-rbx/rokit)
+* [Luau Language Server](https://github.com/JohnnyMorganz/luau-lsp) (Only needed if working on the Studio plugin.)
+
+When working on the Studio plugin, we recommend using this command to automatically rebuild the plugin when you save a change:
+
+*(Make sure you've enabled the Studio setting to reload plugins on file change!)*
+
+```bash
+bash scripts/watch-build-plugin.sh
+```
+
+You can also run the plugin's unit tests with the following:
+
+*(Make sure you have `run-in-roblox` installed first!)*
+
+```bash
+bash scripts/unit-test-plugin.sh
+```
 
 ## Documentation
 Documentation impacts way more people than the individual lines of code we write.
 
-If you find any problems in documentation, including typos, bad grammar, misleading phrasing, or missing content, feel free to file issues and pull requests to fix them.
+If you find any problems in the documentation, including typos, bad grammar, misleading phrasing, or missing content, feel free to file issues and pull requests to fix them.
 
 ## Bug Reports and Feature Requests
 Most of the tools around Rojo try to be clear when an issue is a bug. Even if they aren't, sometimes things don't work quite right.

Cargo.toml

@@ -1,8 +1,12 @@
 [package]
 name = "rojo"
-version = "7.2.1"
+version = "7.7.0-rc.1"
-rust-version = "1.58.1"
+rust-version = "1.88"
-authors = ["Lucien Greathouse <me@lpghatguy.com>"]
+authors = [
+    "Lucien Greathouse <me@lpghatguy.com>",
+    "Micah Reid <git@dekkonot.com>",
+    "Ken Loeffler <kenloef@gmail.com>",
+]
 description = "Enables professional-grade development tools for Roblox developers"
 license = "MPL-2.0"
 homepage = "https://rojo.space"
@@ -12,9 +16,7 @@ readme = "README.md"
 edition = "2021"
 build = "build.rs"
 
-exclude = [
+exclude = ["/test-projects/**"]
-    "/test-projects/**",
-]
 
 [profile.dev]
 panic = "abort"
@@ -28,7 +30,9 @@ default = []
 # Enable this feature to live-reload assets from the web UI.
 dev_live_assets = []
 
-profile-with-tracy = ["profiling/profile-with-tracy", "tracy-client"]
+# Run Rojo with this feature to open a Tracy session.
+# Currently uses protocol v63, last supported in Tracy 0.9.1.
+profile-with-tracy = ["profiling/profile-with-tracy"]
 
 [workspace]
 members = ["crates/*"]
@@ -42,69 +46,85 @@ name = "build"
 harness = false
 
 [dependencies]
-memofs = { version = "0.2.0", path = "crates/memofs" }
+memofs = { version = "0.3.1", path = "crates/memofs" }
 
 # These dependencies can be uncommented when working on rbx-dom simultaneously
-# rbx_binary = { path = "../rbx-dom/rbx_binary" }
+# rbx_binary = { path = "../rbx-dom/rbx_binary", features = [
+#     "unstable_text_format",
+# ] }
 # rbx_dom_weak = { path = "../rbx-dom/rbx_dom_weak" }
 # rbx_reflection = { path = "../rbx-dom/rbx_reflection" }
 # rbx_reflection_database = { path = "../rbx-dom/rbx_reflection_database" }
 # rbx_xml = { path = "../rbx-dom/rbx_xml" }
 
-rbx_binary = "0.6.5"
+rbx_binary = { version = "2.0.1", features = ["unstable_text_format"] }
-rbx_dom_weak = "2.4.0"
+rbx_dom_weak = "4.1.0"
-rbx_reflection = "4.2.0"
+rbx_reflection = "6.1.0"
-rbx_reflection_database = "0.2.2"
+rbx_reflection_database = "2.0.2"
-rbx_xml = "0.12.3"
+rbx_xml = "2.0.1"
 
-anyhow = "1.0.44"
+anyhow = "1.0.80"
-backtrace = "0.3.61"
+backtrace = "0.3.69"
 bincode = "1.3.3"
-crossbeam-channel = "0.5.1"
+crossbeam-channel = "0.5.12"
-csv = "1.1.6"
+csv = "1.3.0"
-env_logger = "0.9.0"
+env_logger = "0.9.3"
-fs-err = "2.6.0"
+fs-err = "2.11.0"
-futures = "0.3.17"
+futures = "0.3.30"
-globset = "0.4.8"
+globset = "0.4.14"
 humantime = "2.1.0"
-hyper = { version = "0.14.13", features = ["server", "tcp", "http1"] }
+hyper = { version = "0.14.28", features = ["server", "tcp", "http1"] }
+hyper-tungstenite = "0.11.0"
 jod-thread = "0.1.2"
-log = "0.4.14"
+log = "0.4.21"
-maplit = "1.0.2"
+num_cpus = "1.16.0"
-notify = "4.0.17"
+opener = "0.5.2"
-opener = "0.5.0"
+rayon = "1.9.0"
-reqwest = { version = "0.11.10", features = ["blocking", "json", "native-tls-vendored"] }
+reqwest = { version = "0.11.24", default-features = false, features = [
+    "blocking",
+    "json",
+    "rustls-tls",
+] }
 ritz = "0.1.0"
 roblox_install = "1.0.0"
-serde = { version = "1.0.130", features = ["derive", "rc"] }
+serde = { version = "1.0.197", features = ["derive", "rc"] }
-serde_json = "1.0.68"
+serde_json = "1.0.145"
-termcolor = "1.1.2"
+jsonc-parser = { version = "0.27.0", features = ["serde"] }
-thiserror = "1.0.30"
+strum = { version = "0.27", features = ["derive"] }
-tokio = { version = "1.12.0", features = ["rt", "rt-multi-thread"] }
+toml = "0.5.11"
-uuid = { version = "1.0.0", features = ["v4", "serde"] }
+termcolor = "1.4.1"
-clap = { version = "3.1.18", features = ["derive"] }
+thiserror = "1.0.57"
-profiling = "1.0.6"
+tokio = { version = "1.36.0", features = ["rt", "rt-multi-thread", "macros"] }
-tracy-client = { version = "0.13.2", optional = true }
+uuid = { version = "1.7.0", features = ["v4", "serde"] }
+clap = { version = "3.2.25", features = ["derive"] }
+profiling = "1.0.15"
+yaml-rust2 = "0.10.3"
+data-encoding = "2.8.0"
+
+blake3 = "1.5.0"
+float-cmp = "0.9.0"
+indexmap = { version = "2.10.0", features = ["serde"] }
 
 [target.'cfg(windows)'.dependencies]
 winreg = "0.10.1"
 
 [build-dependencies]
-memofs = { version = "0.2.0", path = "crates/memofs" }
+memofs = { version = "0.3.0", path = "crates/memofs" }
 
-embed-resource = "1.6.4"
+embed-resource = "1.8.0"
-anyhow = "1.0.44"
+anyhow = "1.0.80"
 bincode = "1.3.3"
-fs-err = "2.6.0"
+fs-err = "2.11.0"
 maplit = "1.0.2"
+semver = "1.0.22"
 
 [dev-dependencies]
 rojo-insta-ext = { path = "crates/rojo-insta-ext" }
 
-criterion = "0.3.5"
+criterion = "0.3.6"
-insta = { version = "1.8.0", features = ["redactions"] }
+insta = { version = "1.36.1", features = ["redactions", "yaml"] }
-paste = "1.0.5"
+paste = "1.0.14"
-pretty_assertions = "1.2.1"
+pretty_assertions = "1.4.0"
-serde_yaml = "0.8.21"
+serde_yaml = "0.8.26"
-tempfile = "3.2.0"
+tempfile = "3.10.1"
-walkdir = "2.3.2"
+walkdir = "2.5.0"

README.md

@@ -1,5 +1,5 @@
 <div align="center">
-    <a href="https://rojo.space"><img src="assets/logo-512.png" alt="Rojo" height="217" /></a>
+    <a href="https://rojo.space"><img src="assets/brand_images/logo-512.png" alt="Rojo" height="217" /></a>
 </div>
 
 <div>&nbsp;</div>
@@ -40,7 +40,7 @@ Check out our [contribution guide](CONTRIBUTING.md) for detailed instructions fo
 
 Pull requests are welcome!
 
-Rojo supports Rust 1.58.1 and newer. The minimum supported version of Rust is based on the latest versions of the dependencies that Rojo has.
+Rojo supports Rust 1.88 and newer. The minimum supported version of Rust is based on the latest versions of the dependencies that Rojo has.
 
 ## License
 Rojo is available under the terms of the Mozilla Public License, Version 2.0. See [LICENSE.txt](LICENSE.txt) for details.

assets/index.css

@@ -17,6 +17,10 @@ html {
   line-height: 1.4;
 }
 
+body {
+  background-color: #e7e7e7
+}
+
 img {
   max-width:100%;
   max-height:100%;

assets/project-templates/model/README.md

@@ -2,7 +2,7 @@
 Generated by [Rojo](https://github.com/rojo-rbx/rojo) {rojo_version}.
 
 ## Getting Started
-To build this library or plugin, use:
+To build this library, use:
 
 ```bash
 rojo build -o "{project_name}.rbxmx"

assets/project-templates/model/gitignore.txt

@@ -1,3 +1,5 @@
 # Roblox Studio lock files
 /*.rbxlx.lock
 /*.rbxl.lock
+
+sourcemap.json

assets/project-templates/place/gitignore.txt

@@ -4,3 +4,5 @@
 # Roblox Studio lock files
 /*.rbxlx.lock
 /*.rbxl.lock
+
+sourcemap.json

assets/project-templates/place/src/client/init.client.luau

@@ -0,0 +1 @@
+print("Hello world, from client!")

assets/project-templates/place/src/server/init.server.luau

@@ -0,0 +1 @@
+print("Hello world, from server!")

assets/project-templates/place/src/shared/Hello.luau

@@ -0,0 +1,3 @@
+return function()
+	print("Hello, world!")
+end

assets/project-templates/plugin/README.md

@@ -0,0 +1,17 @@
+# {project_name}
+Generated by [Rojo](https://github.com/rojo-rbx/rojo) {rojo_version}.
+
+## Getting Started
+To build this plugin to your local plugins folder, use:
+
+```bash
+rojo build -p "{project_name}.rbxm"
+```
+
+You can include the `watch` flag to re-build it on save:
+
+```bash
+rojo build -p "{project_name}.rbxm" --watch
+```
+
+For more help, check out [the Rojo documentation](https://rojo.space/docs).

assets/project-templates/plugin/default.project.json

@@ -0,0 +1,6 @@
+{
+  "name": "{project_name}",
+  "tree": {
+    "$path": "src"
+  }
+}

assets/project-templates/plugin/gitignore.txt

@@ -0,0 +1,5 @@
+# Plugin model files
+/{project_name}.rbxmx
+/{project_name}.rbxm
+
+sourcemap.json

assets/project-templates/plugin/src/init.server.luau

@@ -0,0 +1 @@
+print("Hello world, from plugin!")

benches/build.rs

@@ -31,11 +31,12 @@ fn bench_build_place(c: &mut Criterion, name: &str, path: &str) {
 fn place_setup<P: AsRef<Path>>(input_path: P) -> (TempDir, BuildCommand) {
     let dir = tempdir().unwrap();
     let input = input_path.as_ref().to_path_buf();
-    let output = dir.path().join("output.rbxlx");
+    let output = Some(dir.path().join("output.rbxlx"));
 
     let options = BuildCommand {
         project: input,
         watch: false,
+        plugin: None,
         output,
     };
 

build.rs

@@ -7,6 +7,7 @@ use fs_err as fs;
 use fs_err::File;
 use maplit::hashmap;
 use memofs::VfsSnapshot;
+use semver::Version;
 
 fn snapshot_from_fs_path(path: &Path) -> io::Result<VfsSnapshot> {
     println!("cargo:rerun-if-changed={}", path.display());
@@ -19,6 +20,10 @@ fn snapshot_from_fs_path(path: &Path) -> io::Result<VfsSnapshot> {
 
             let file_name = entry.file_name().to_str().unwrap().to_owned();
 
+            if file_name.starts_with(".git") {
+                continue;
+            }
+
             // We can skip any TestEZ test files since they aren't necessary for
             // the plugin to run.
             if file_name.ends_with(".spec.lua") || file_name.ends_with(".spec.luau") {
@@ -40,23 +45,39 @@ fn snapshot_from_fs_path(path: &Path) -> io::Result<VfsSnapshot> {
 fn main() -> Result<(), anyhow::Error> {
     let out_dir = env::var_os("OUT_DIR").unwrap();
 
-    let root_dir = env::var_os("CARGO_MANIFEST_DIR").unwrap();
+    let root_dir = PathBuf::from(env::var_os("CARGO_MANIFEST_DIR").unwrap());
-    let plugin_root = PathBuf::from(root_dir).join("plugin");
+    let plugin_dir = root_dir.join("plugin");
+    let templates_dir = root_dir.join("assets").join("project-templates");
 
-    let snapshot = VfsSnapshot::dir(hashmap! {
+    let our_version = Version::parse(env::var_os("CARGO_PKG_VERSION").unwrap().to_str().unwrap())?;
-        "default.project.json" => snapshot_from_fs_path(&plugin_root.join("default.project.json"))?,
+    let plugin_version =
-        "fmt" => snapshot_from_fs_path(&plugin_root.join("fmt"))?,
+        Version::parse(fs::read_to_string(plugin_dir.join("Version.txt"))?.trim())?;
-        "http" => snapshot_from_fs_path(&plugin_root.join("http"))?,
+
-        "log" => snapshot_from_fs_path(&plugin_root.join("log"))?,
+    assert_eq!(
-        "rbx_dom_lua" => snapshot_from_fs_path(&plugin_root.join("rbx_dom_lua"))?,
+        our_version, plugin_version,
-        "src" => snapshot_from_fs_path(&plugin_root.join("src"))?,
+        "plugin version does not match Cargo version"
-        "Packages" => snapshot_from_fs_path(&plugin_root.join("Packages"))?,
+    );
+
+    let template_snapshot = snapshot_from_fs_path(&templates_dir)?;
+
+    let plugin_snapshot = VfsSnapshot::dir(hashmap! {
+        "default.project.json" => snapshot_from_fs_path(&root_dir.join("plugin.project.json"))?,
+        "plugin" => VfsSnapshot::dir(hashmap! {
+            "fmt" => snapshot_from_fs_path(&plugin_dir.join("fmt"))?,
+            "http" => snapshot_from_fs_path(&plugin_dir.join("http"))?,
+            "log" => snapshot_from_fs_path(&plugin_dir.join("log"))?,
+            "rbx_dom_lua" => snapshot_from_fs_path(&plugin_dir.join("rbx_dom_lua"))?,
+            "src" => snapshot_from_fs_path(&plugin_dir.join("src"))?,
+            "Packages" => snapshot_from_fs_path(&plugin_dir.join("Packages"))?,
+            "Version.txt" => snapshot_from_fs_path(&plugin_dir.join("Version.txt"))?,
+        }),
     });
 
-    let out_path = Path::new(&out_dir).join("plugin.bincode");
+    let template_file = File::create(Path::new(&out_dir).join("templates.bincode"))?;
-    let out_file = File::create(&out_path)?;
+    let plugin_file = File::create(Path::new(&out_dir).join("plugin.bincode"))?;
 
-    bincode::serialize_into(out_file, &snapshot)?;
+    bincode::serialize_into(plugin_file, &plugin_snapshot)?;
+    bincode::serialize_into(template_file, &template_snapshot)?;
 
     println!("cargo:rerun-if-changed=build/windows/rojo-manifest.rc");
     println!("cargo:rerun-if-changed=build/windows/rojo.manifest");

crates/memofs/CHANGELOG.md

@@ -1,6 +1,21 @@
 # memofs Changelog
 
 ## Unreleased Changes
+* Added `Vfs::canonicalize`. [#1201]
+
+## 0.3.1 (2025-11-27)
+* Added `Vfs::exists`. [#1169]
+* Added `create_dir` and `create_dir_all` to allow creating directories. [#937]
+
+[#1169]: https://github.com/rojo-rbx/rojo/pull/1169
+[#937]: https://github.com/rojo-rbx/rojo/pull/937
+
+## 0.3.0 (2024-03-15)
+* Changed `StdBackend` file watching component to use minimal recursive watches. [#830]
+* Added `Vfs::read_to_string` and `Vfs::read_to_string_lf_normalized` [#854]
+
+[#830]: https://github.com/rojo-rbx/rojo/pull/830
+[#854]: https://github.com/rojo-rbx/rojo/pull/854
 
 ## 0.2.0 (2021-08-23)
 * Updated to `crossbeam-channel` 0.5.1.

crates/memofs/Cargo.toml

@@ -1,8 +1,12 @@
 [package]
 name = "memofs"
 description = "Virtual filesystem with configurable backends."
-version = "0.2.0"
+version = "0.3.1"
-authors = ["Lucien Greathouse <me@lpghatguy.com>"]
+authors = [
+    "Lucien Greathouse <me@lpghatguy.com>",
+    "Micah Reid <git@dekkonot.com>",
+    "Ken Loeffler <kenloef@gmail.com>",
+]
 edition = "2018"
 readme = "README.md"
 license = "MIT"
@@ -11,7 +15,10 @@ homepage = "https://github.com/rojo-rbx/rojo/tree/master/memofs"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-crossbeam-channel = "0.5.1"
+crossbeam-channel = "0.5.12"
-fs-err = "2.3.0"
+fs-err = "2.11.0"
-notify = "4.0.15"
+notify = "4.0.17"
-serde = { version = "1.0", features = ["derive"] }
+serde = { version = "1.0.197", features = ["derive"] }
+
+[dev-dependencies]
+tempfile = "3.10.1"

crates/memofs/src/in_memory_fs.rs

@@ -50,6 +50,12 @@ impl InMemoryFs {
     }
 }
 
+impl Default for InMemoryFs {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 #[derive(Debug)]
 struct InMemoryFsInner {
     entries: HashMap<PathBuf, Entry>,
@@ -151,6 +157,11 @@ impl VfsBackend for InMemoryFs {
         )
     }
 
+    fn exists(&mut self, path: &Path) -> io::Result<bool> {
+        let inner = self.inner.lock().unwrap();
+        Ok(inner.entries.contains_key(path))
+    }
+
     fn read_dir(&mut self, path: &Path) -> io::Result<ReadDir> {
         let inner = self.inner.lock().unwrap();
 
@@ -170,6 +181,21 @@ impl VfsBackend for InMemoryFs {
         }
     }
 
+    fn create_dir(&mut self, path: &Path) -> io::Result<()> {
+        let mut inner = self.inner.lock().unwrap();
+        inner.load_snapshot(path.to_path_buf(), VfsSnapshot::empty_dir())
+    }
+
+    fn create_dir_all(&mut self, path: &Path) -> io::Result<()> {
+        let mut inner = self.inner.lock().unwrap();
+        let mut path_buf = path.to_path_buf();
+        while let Some(parent) = path_buf.parent() {
+            inner.load_snapshot(parent.to_path_buf(), VfsSnapshot::empty_dir())?;
+            path_buf.pop();
+        }
+        inner.load_snapshot(path.to_path_buf(), VfsSnapshot::empty_dir())
+    }
+
     fn remove_file(&mut self, path: &Path) -> io::Result<()> {
         let mut inner = self.inner.lock().unwrap();
 
@@ -206,6 +232,33 @@ impl VfsBackend for InMemoryFs {
         }
     }
 
+    // TODO: We rely on Rojo to prepend cwd to any relative path before storing paths
+    // in MemoFS. The current implementation will error if no prepended absolute path
+    // is found. It really only normalizes paths within the provided path's context.
+    // Example: "/Users/username/project/../other/file.txt" ->
+    // "/Users/username/other/file.txt"
+    // Erroneous example: "/Users/../../other/file.txt" -> "/other/file.txt"
+    // This is not very robust. We should implement proper path normalization here or otherwise
+    // warn if we are missing context and can not fully canonicalize the path correctly.
+    fn canonicalize(&mut self, path: &Path) -> io::Result<PathBuf> {
+        let mut normalized = PathBuf::new();
+        for component in path.components() {
+            match component {
+                std::path::Component::ParentDir => {
+                    normalized.pop();
+                }
+                std::path::Component::CurDir => {}
+                _ => normalized.push(component),
+            }
+        }
+
+        let inner = self.inner.lock().unwrap();
+        match inner.entries.get(&normalized) {
+            Some(_) => Ok(normalized),
+            None => not_found(&normalized),
+        }
+    }
+
     fn event_receiver(&self) -> crossbeam_channel::Receiver<VfsEvent> {
         let inner = self.inner.lock().unwrap();
 
@@ -222,23 +275,17 @@ impl VfsBackend for InMemoryFs {
 }
 
 fn must_be_file<T>(path: &Path) -> io::Result<T> {
-    Err(io::Error::new(
+    Err(io::Error::other(format!(
-        io::ErrorKind::Other,
+        "path {} was a directory, but must be a file",
-        format!(
+        path.display()
-            "path {} was a directory, but must be a file",
+    )))
-            path.display()
-        ),
-    ))
 }
 
 fn must_be_dir<T>(path: &Path) -> io::Result<T> {
-    Err(io::Error::new(
+    Err(io::Error::other(format!(
-        io::ErrorKind::Other,
+        "path {} was a file, but must be a directory",
-        format!(
+        path.display()
-            "path {} was a file, but must be a directory",
+    )))
-            path.display()
-        ),
-    ))
 }
 
 fn not_found<T>(path: &Path) -> io::Result<T> {

crates/memofs/src/lib.rs

@@ -22,9 +22,9 @@ mod noop_backend;
 mod snapshot;
 mod std_backend;
 
-use std::io;
 use std::path::{Path, PathBuf};
 use std::sync::{Arc, Mutex, MutexGuard};
+use std::{io, str};
 
 pub use in_memory_fs::InMemoryFs;
 pub use noop_backend::NoopBackend;
@@ -70,10 +70,14 @@ impl<T> IoResultExt<T> for io::Result<T> {
 pub trait VfsBackend: sealed::Sealed + Send + 'static {
     fn read(&mut self, path: &Path) -> io::Result<Vec<u8>>;
     fn write(&mut self, path: &Path, data: &[u8]) -> io::Result<()>;
+    fn exists(&mut self, path: &Path) -> io::Result<bool>;
     fn read_dir(&mut self, path: &Path) -> io::Result<ReadDir>;
+    fn create_dir(&mut self, path: &Path) -> io::Result<()>;
+    fn create_dir_all(&mut self, path: &Path) -> io::Result<()>;
     fn metadata(&mut self, path: &Path) -> io::Result<Metadata>;
     fn remove_file(&mut self, path: &Path) -> io::Result<()>;
     fn remove_dir_all(&mut self, path: &Path) -> io::Result<()>;
+    fn canonicalize(&mut self, path: &Path) -> io::Result<PathBuf>;
 
     fn event_receiver(&self) -> crossbeam_channel::Receiver<VfsEvent>;
     fn watch(&mut self, path: &Path) -> io::Result<()>;
@@ -155,6 +159,29 @@ impl VfsInner {
         Ok(Arc::new(contents))
     }
 
+    fn read_to_string<P: AsRef<Path>>(&mut self, path: P) -> io::Result<Arc<String>> {
+        let path = path.as_ref();
+        let contents = self.backend.read(path)?;
+
+        if self.watch_enabled {
+            self.backend.watch(path)?;
+        }
+
+        let contents_str = str::from_utf8(&contents).map_err(|_| {
+            io::Error::new(
+                io::ErrorKind::InvalidData,
+                format!("File was not valid UTF-8: {}", path.display()),
+            )
+        })?;
+
+        Ok(Arc::new(contents_str.into()))
+    }
+
+    fn exists<P: AsRef<Path>>(&mut self, path: P) -> io::Result<bool> {
+        let path = path.as_ref();
+        self.backend.exists(path)
+    }
+
     fn write<P: AsRef<Path>, C: AsRef<[u8]>>(&mut self, path: P, contents: C) -> io::Result<()> {
         let path = path.as_ref();
         let contents = contents.as_ref();
@@ -172,6 +199,16 @@ impl VfsInner {
         Ok(dir)
     }
 
+    fn create_dir<P: AsRef<Path>>(&mut self, path: P) -> io::Result<()> {
+        let path = path.as_ref();
+        self.backend.create_dir(path)
+    }
+
+    fn create_dir_all<P: AsRef<Path>>(&mut self, path: P) -> io::Result<()> {
+        let path = path.as_ref();
+        self.backend.create_dir_all(path)
+    }
+
     fn remove_file<P: AsRef<Path>>(&mut self, path: P) -> io::Result<()> {
         let path = path.as_ref();
         let _ = self.backend.unwatch(path);
@@ -189,16 +226,18 @@ impl VfsInner {
         self.backend.metadata(path)
     }
 
+    fn canonicalize<P: AsRef<Path>>(&mut self, path: P) -> io::Result<PathBuf> {
+        let path = path.as_ref();
+        self.backend.canonicalize(path)
+    }
+
     fn event_receiver(&self) -> crossbeam_channel::Receiver<VfsEvent> {
         self.backend.event_receiver()
     }
 
     fn commit_event(&mut self, event: &VfsEvent) -> io::Result<()> {
-        match event {
+        if let VfsEvent::Remove(path) = event {
-            VfsEvent::Remove(path) => {
+            let _ = self.backend.unwatch(path);
-                let _ = self.backend.unwatch(&path);
-            }
-            _ => {}
         }
 
         Ok(())
@@ -261,6 +300,33 @@ impl Vfs {
         self.inner.lock().unwrap().read(path)
     }
 
+    /// Read a file from the VFS (or from the underlying backend if it isn't
+    /// resident) into a string.
+    ///
+    /// Roughly equivalent to [`std::fs::read_to_string`][std::fs::read_to_string].
+    ///
+    /// [std::fs::read_to_string]: https://doc.rust-lang.org/stable/std/fs/fn.read_to_string.html
+    #[inline]
+    pub fn read_to_string<P: AsRef<Path>>(&self, path: P) -> io::Result<Arc<String>> {
+        let path = path.as_ref();
+        self.inner.lock().unwrap().read_to_string(path)
+    }
+
+    /// Read a file from the VFS (or the underlying backend if it isn't
+    /// resident) into a string, and normalize its line endings to LF.
+    ///
+    /// Roughly equivalent to [`std::fs::read_to_string`][std::fs::read_to_string], but also performs
+    /// line ending normalization.
+    ///
+    /// [std::fs::read_to_string]: https://doc.rust-lang.org/stable/std/fs/fn.read_to_string.html
+    #[inline]
+    pub fn read_to_string_lf_normalized<P: AsRef<Path>>(&self, path: P) -> io::Result<Arc<String>> {
+        let path = path.as_ref();
+        let contents = self.inner.lock().unwrap().read_to_string(path)?;
+
+        Ok(contents.replace("\r\n", "\n").into())
+    }
+
     /// Write a file to the VFS and the underlying backend.
     ///
     /// Roughly equivalent to [`std::fs::write`][std::fs::write].
@@ -284,6 +350,42 @@ impl Vfs {
         self.inner.lock().unwrap().read_dir(path)
     }
 
+    /// Return whether the given path exists.
+    ///
+    /// Roughly equivalent to [`std::fs::exists`][std::fs::exists].
+    ///
+    /// [std::fs::exists]: https://doc.rust-lang.org/stable/std/fs/fn.exists.html
+    #[inline]
+    pub fn exists<P: AsRef<Path>>(&self, path: P) -> io::Result<bool> {
+        let path = path.as_ref();
+        self.inner.lock().unwrap().exists(path)
+    }
+
+    /// Creates a directory at the provided location.
+    ///
+    /// Roughly equivalent to [`std::fs::create_dir`][std::fs::create_dir].
+    /// Similiar to that function, this function will fail if the parent of the
+    /// path does not exist.
+    ///
+    /// [std::fs::create_dir]: https://doc.rust-lang.org/stable/std/fs/fn.create_dir.html
+    #[inline]
+    pub fn create_dir<P: AsRef<Path>>(&self, path: P) -> io::Result<()> {
+        let path = path.as_ref();
+        self.inner.lock().unwrap().create_dir(path)
+    }
+
+    /// Creates a directory at the provided location, recursively creating
+    /// all parent components if they are missing.
+    ///
+    /// Roughly equivalent to [`std::fs::create_dir_all`][std::fs::create_dir_all].
+    ///
+    /// [std::fs::create_dir_all]: https://doc.rust-lang.org/stable/std/fs/fn.create_dir_all.html
+    #[inline]
+    pub fn create_dir_all<P: AsRef<Path>>(&self, path: P) -> io::Result<()> {
+        let path = path.as_ref();
+        self.inner.lock().unwrap().create_dir_all(path)
+    }
+
     /// Remove a file.
     ///
     /// Roughly equivalent to [`std::fs::remove_file`][std::fs::remove_file].
@@ -317,6 +419,19 @@ impl Vfs {
         self.inner.lock().unwrap().metadata(path)
     }
 
+    /// Normalize a path via the underlying backend.
+    ///
+    /// Roughly equivalent to [`std::fs::canonicalize`][std::fs::canonicalize]. Relative paths are
+    /// resolved against the backend's current working directory (if applicable) and errors are
+    /// surfaced directly from the backend.
+    ///
+    /// [std::fs::canonicalize]: https://doc.rust-lang.org/stable/std/fs/fn.canonicalize.html
+    #[inline]
+    pub fn canonicalize<P: AsRef<Path>>(&self, path: P) -> io::Result<PathBuf> {
+        let path = path.as_ref();
+        self.inner.lock().unwrap().canonicalize(path)
+    }
+
     /// Retrieve a handle to the event receiver for this `Vfs`.
     #[inline]
     pub fn event_receiver(&self) -> crossbeam_channel::Receiver<VfsEvent> {
@@ -386,6 +501,31 @@ impl VfsLock<'_> {
         self.inner.read_dir(path)
     }
 
+    /// Creates a directory at the provided location.
+    ///
+    /// Roughly equivalent to [`std::fs::create_dir`][std::fs::create_dir].
+    /// Similiar to that function, this function will fail if the parent of the
+    /// path does not exist.
+    ///
+    /// [std::fs::create_dir]: https://doc.rust-lang.org/stable/std/fs/fn.create_dir.html
+    #[inline]
+    pub fn create_dir<P: AsRef<Path>>(&mut self, path: P) -> io::Result<()> {
+        let path = path.as_ref();
+        self.inner.create_dir(path)
+    }
+
+    /// Creates a directory at the provided location, recursively creating
+    /// all parent components if they are missing.
+    ///
+    /// Roughly equivalent to [`std::fs::create_dir_all`][std::fs::create_dir_all].
+    ///
+    /// [std::fs::create_dir_all]: https://doc.rust-lang.org/stable/std/fs/fn.create_dir_all.html
+    #[inline]
+    pub fn create_dir_all<P: AsRef<Path>>(&mut self, path: P) -> io::Result<()> {
+        let path = path.as_ref();
+        self.inner.create_dir_all(path)
+    }
+
     /// Remove a file.
     ///
     /// Roughly equivalent to [`std::fs::remove_file`][std::fs::remove_file].
@@ -419,6 +559,13 @@ impl VfsLock<'_> {
         self.inner.metadata(path)
     }
 
+    /// Normalize a path via the underlying backend.
+    #[inline]
+    pub fn normalize<P: AsRef<Path>>(&mut self, path: P) -> io::Result<PathBuf> {
+        let path = path.as_ref();
+        self.inner.canonicalize(path)
+    }
+
     /// Retrieve a handle to the event receiver for this `Vfs`.
     #[inline]
     pub fn event_receiver(&self) -> crossbeam_channel::Receiver<VfsEvent> {
@@ -431,3 +578,83 @@ impl VfsLock<'_> {
         self.inner.commit_event(event)
     }
 }
+
+#[cfg(test)]
+mod test {
+    use crate::{InMemoryFs, StdBackend, Vfs, VfsSnapshot};
+    use std::io;
+    use std::path::PathBuf;
+
+    /// https://github.com/rojo-rbx/rojo/issues/899
+    #[test]
+    fn read_to_string_lf_normalized_keeps_trailing_newline() {
+        let mut imfs = InMemoryFs::new();
+        imfs.load_snapshot("test", VfsSnapshot::file("bar\r\nfoo\r\n\r\n"))
+            .unwrap();
+
+        let vfs = Vfs::new(imfs);
+
+        assert_eq!(
+            vfs.read_to_string_lf_normalized("test").unwrap().as_str(),
+            "bar\nfoo\n\n"
+        );
+    }
+
+    /// https://github.com/rojo-rbx/rojo/issues/1200
+    #[test]
+    fn canonicalize_in_memory_success() {
+        let mut imfs = InMemoryFs::new();
+        let contents = "Lorem ipsum dolor sit amet.".to_string();
+
+        imfs.load_snapshot("/test/file.txt", VfsSnapshot::file(contents.to_string()))
+            .unwrap();
+
+        let vfs = Vfs::new(imfs);
+
+        assert_eq!(
+            vfs.canonicalize("/test/nested/../file.txt").unwrap(),
+            PathBuf::from("/test/file.txt")
+        );
+        assert_eq!(
+            vfs.read_to_string(vfs.canonicalize("/test/nested/../file.txt").unwrap())
+                .unwrap()
+                .to_string(),
+            contents.to_string()
+        );
+    }
+
+    #[test]
+    fn canonicalize_in_memory_missing_errors() {
+        let imfs = InMemoryFs::new();
+        let vfs = Vfs::new(imfs);
+
+        let err = vfs.canonicalize("test").unwrap_err();
+        assert_eq!(err.kind(), io::ErrorKind::NotFound);
+    }
+
+    #[test]
+    fn canonicalize_std_backend_success() {
+        let contents = "Lorem ipsum dolor sit amet.".to_string();
+        let dir = tempfile::tempdir().unwrap();
+        let file_path = dir.path().join("file.txt");
+        fs_err::write(&file_path, contents.to_string()).unwrap();
+
+        let vfs = Vfs::new(StdBackend::new());
+        let canonicalized = vfs.canonicalize(&file_path).unwrap();
+        assert_eq!(canonicalized, file_path.canonicalize().unwrap());
+        assert_eq!(
+            vfs.read_to_string(&canonicalized).unwrap().to_string(),
+            contents.to_string()
+        );
+    }
+
+    #[test]
+    fn canonicalize_std_backend_missing_errors() {
+        let dir = tempfile::tempdir().unwrap();
+        let file_path = dir.path().join("test");
+
+        let vfs = Vfs::new(StdBackend::new());
+        let err = vfs.canonicalize(&file_path).unwrap_err();
+        assert_eq!(err.kind(), io::ErrorKind::NotFound);
+    }
+}

crates/memofs/src/noop_backend.rs

@@ -1,5 +1,5 @@
 use std::io;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 
 use crate::{Metadata, ReadDir, VfsBackend, VfsEvent};
 
@@ -15,45 +15,43 @@ impl NoopBackend {
 
 impl VfsBackend for NoopBackend {
     fn read(&mut self, _path: &Path) -> io::Result<Vec<u8>> {
-        Err(io::Error::new(
+        Err(io::Error::other("NoopBackend doesn't do anything"))
-            io::ErrorKind::Other,
-            "NoopBackend doesn't do anything",
-        ))
     }
 
     fn write(&mut self, _path: &Path, _data: &[u8]) -> io::Result<()> {
-        Err(io::Error::new(
+        Err(io::Error::other("NoopBackend doesn't do anything"))
-            io::ErrorKind::Other,
+    }
-            "NoopBackend doesn't do anything",
+
-        ))
+    fn exists(&mut self, _path: &Path) -> io::Result<bool> {
+        Err(io::Error::other("NoopBackend doesn't do anything"))
     }
 
     fn read_dir(&mut self, _path: &Path) -> io::Result<ReadDir> {
-        Err(io::Error::new(
+        Err(io::Error::other("NoopBackend doesn't do anything"))
-            io::ErrorKind::Other,
+    }
-            "NoopBackend doesn't do anything",
+
-        ))
+    fn create_dir(&mut self, _path: &Path) -> io::Result<()> {
+        Err(io::Error::other("NoopBackend doesn't do anything"))
+    }
+
+    fn create_dir_all(&mut self, _path: &Path) -> io::Result<()> {
+        Err(io::Error::other("NoopBackend doesn't do anything"))
     }
 
     fn remove_file(&mut self, _path: &Path) -> io::Result<()> {
-        Err(io::Error::new(
+        Err(io::Error::other("NoopBackend doesn't do anything"))
-            io::ErrorKind::Other,
-            "NoopBackend doesn't do anything",
-        ))
     }
 
     fn remove_dir_all(&mut self, _path: &Path) -> io::Result<()> {
-        Err(io::Error::new(
+        Err(io::Error::other("NoopBackend doesn't do anything"))
-            io::ErrorKind::Other,
-            "NoopBackend doesn't do anything",
-        ))
     }
 
     fn metadata(&mut self, _path: &Path) -> io::Result<Metadata> {
-        Err(io::Error::new(
+        Err(io::Error::other("NoopBackend doesn't do anything"))
-            io::ErrorKind::Other,
+    }
-            "NoopBackend doesn't do anything",
+
-        ))
+    fn canonicalize(&mut self, _path: &Path) -> io::Result<PathBuf> {
+        Err(io::Error::other("NoopBackend doesn't do anything"))
     }
 
     fn event_receiver(&self) -> crossbeam_channel::Receiver<VfsEvent> {
@@ -61,16 +59,16 @@ impl VfsBackend for NoopBackend {
     }
 
     fn watch(&mut self, _path: &Path) -> io::Result<()> {
-        Err(io::Error::new(
+        Err(io::Error::other("NoopBackend doesn't do anything"))
-            io::ErrorKind::Other,
-            "NoopBackend doesn't do anything",
-        ))
     }
 
     fn unwatch(&mut self, _path: &Path) -> io::Result<()> {
-        Err(io::Error::new(
+        Err(io::Error::other("NoopBackend doesn't do anything"))
-            io::ErrorKind::Other,
+    }
-            "NoopBackend doesn't do anything",
+}
-        ))
+
+impl Default for NoopBackend {
+    fn default() -> Self {
+        Self::new()
     }
 }

crates/memofs/src/std_backend.rs

@@ -1,8 +1,8 @@
-use std::io;
+use std::path::{Path, PathBuf};
-use std::path::Path;
 use std::sync::mpsc;
 use std::thread;
 use std::time::Duration;
+use std::{collections::HashSet, io};
 
 use crossbeam_channel::Receiver;
 use notify::{watcher, DebouncedEvent, RecommendedWatcher, RecursiveMode, Watcher};
@@ -13,6 +13,7 @@ use crate::{DirEntry, Metadata, ReadDir, VfsBackend, VfsEvent};
 pub struct StdBackend {
     watcher: RecommendedWatcher,
     watcher_receiver: Receiver<VfsEvent>,
+    watches: HashSet<PathBuf>,
 }
 
 impl StdBackend {
@@ -48,6 +49,7 @@ impl StdBackend {
         Self {
             watcher,
             watcher_receiver: rx,
+            watches: HashSet::new(),
         }
     }
 }
@@ -61,6 +63,10 @@ impl VfsBackend for StdBackend {
         fs_err::write(path, data)
     }
 
+    fn exists(&mut self, path: &Path) -> io::Result<bool> {
+        std::fs::exists(path)
+    }
+
     fn read_dir(&mut self, path: &Path) -> io::Result<ReadDir> {
         let entries: Result<Vec<_>, _> = fs_err::read_dir(path)?.collect();
         let mut entries = entries?;
@@ -76,6 +82,14 @@ impl VfsBackend for StdBackend {
         })
     }
 
+    fn create_dir(&mut self, path: &Path) -> io::Result<()> {
+        fs_err::create_dir(path)
+    }
+
+    fn create_dir_all(&mut self, path: &Path) -> io::Result<()> {
+        fs_err::create_dir_all(path)
+    }
+
     fn remove_file(&mut self, path: &Path) -> io::Result<()> {
         fs_err::remove_file(path)
     }
@@ -92,19 +106,37 @@ impl VfsBackend for StdBackend {
         })
     }
 
+    fn canonicalize(&mut self, path: &Path) -> io::Result<PathBuf> {
+        fs_err::canonicalize(path)
+    }
+
     fn event_receiver(&self) -> crossbeam_channel::Receiver<VfsEvent> {
         self.watcher_receiver.clone()
     }
 
     fn watch(&mut self, path: &Path) -> io::Result<()> {
-        self.watcher
+        if self.watches.contains(path)
-            .watch(path, RecursiveMode::NonRecursive)
+            || path
-            .map_err(|inner| io::Error::new(io::ErrorKind::Other, inner))
+                .ancestors()
+                .any(|ancestor| self.watches.contains(ancestor))
+        {
+            Ok(())
+        } else {
+            self.watches.insert(path.to_path_buf());
+            self.watcher
+                .watch(path, RecursiveMode::Recursive)
+                .map_err(io::Error::other)
+        }
     }
 
     fn unwatch(&mut self, path: &Path) -> io::Result<()> {
-        self.watcher
+        self.watches.remove(path);
-            .unwatch(path)
+        self.watcher.unwatch(path).map_err(io::Error::other)
-            .map_err(|inner| io::Error::new(io::ErrorKind::Other, inner))
+    }
+}
+
+impl Default for StdBackend {
+    fn default() -> Self {
+        Self::new()
     }
 }

crates/rojo-insta-ext/Cargo.toml

@@ -6,5 +6,5 @@ edition = "2018"
 publish = false
 
 [dependencies]
-serde = "1.0.99"
+serde = "1.0.197"
-serde_yaml = "0.8.9"
+serde_yaml = "0.8.26"

crates/rojo-insta-ext/src/redaction_map.rs

@@ -5,19 +5,13 @@ use serde::Serialize;
 /// Enables redacting any value that serializes as a string.
 ///
 /// Used for transforming Rojo instance IDs into something deterministic.
+#[derive(Default)]
 pub struct RedactionMap {
     ids: HashMap<String, usize>,
     last_id: usize,
 }
 
 impl RedactionMap {
-    pub fn new() -> Self {
-        Self {
-            ids: HashMap::new(),
-            last_id: 0,
-        }
-    }
-
     pub fn get_redacted_value(&self, id: impl ToString) -> Option<String> {
         let id = id.to_string();
 
@@ -28,6 +22,12 @@ impl RedactionMap {
         }
     }
 
+    /// Returns the numeric ID that was assigned to the provided value,
+    /// if one exists.
+    pub fn get_id_for_value(&self, value: impl ToString) -> Option<usize> {
+        self.ids.get(&value.to_string()).cloned()
+    }
+
     pub fn intern(&mut self, id: impl ToString) {
         let last_id = &mut self.last_id;
 

foreman.toml

@@ -1,5 +0,0 @@
-[tools]
-rojo = { source = "rojo-rbx/rojo", version = "7.2.1" }
-run-in-roblox = { source = "rojo-rbx/run-in-roblox", version = "0.3.0" }
-selene = { source = "Kampfkarren/selene", version = "0.20.0" }
-wally = { source = "UpliftGames/wally", version = "0.3.1"}

plugin.project.json

@@ -0,0 +1,27 @@
+{
+  "name": "Rojo",
+  "tree": {
+    "$className": "Folder",
+    "Plugin": {
+      "$path": "plugin/src"
+    },
+    "Packages": {
+      "$path": "plugin/Packages",
+      "Log": {
+        "$path": "plugin/log"
+      },
+      "Http": {
+        "$path": "plugin/http"
+      },
+      "Fmt": {
+        "$path": "plugin/fmt"
+      },
+      "RbxDom": {
+        "$path": "plugin/rbx_dom_lua"
+      }
+    },
+    "Version": {
+      "$path": "plugin/Version.txt"
+    }
+  }
+}

plugin/Version.txt

@@ -0,0 +1 @@
+7.7.0-rc.1

plugin/default.project.json

@@ -1,25 +0,0 @@
-{
-	"name": "Rojo",
-	"tree": {
-		"$className": "Folder",
-		"Plugin": {
-			"$path": "src"
-		},
-		"Packages": {
-			"$path": "Packages",
-
-			"Log": {
-				"$path": "log"
-			},
-			"Http": {
-				"$path": "http"
-			},
-			"Fmt": {
-				"$path": "fmt"
-			},
-			"RbxDom": {
-				"$path": "rbx_dom_lua"
-			}
-		}
-	}
-}

plugin/fmt/init.lua

@@ -25,7 +25,7 @@
 local function defaultTableDebug(buffer, input)
 	buffer:writeRaw("{")
 
-	for key, value in pairs(input) do
+	for key, value in input do
 		buffer:write("[{:?}] = {:?}", key, value)
 
 		if next(input, key) ~= nil then
@@ -50,7 +50,7 @@ local function defaultTableDebugExtended(buffer, input)
 	buffer:writeLineRaw("{")
 	buffer:indent()
 
-	for key, value in pairs(input) do
+	for key, value in input do
 		buffer:writeLine("[{:?}] = {:#?},", key, value)
 	end
 
@@ -70,7 +70,7 @@ local function debugImpl(buffer, value, extendedForm)
 	elseif valueType == "table" then
 		local valueMeta = getmetatable(value)
 
-		if valueMeta ~= nil and  valueMeta.__fmtDebug ~= nil then
+		if valueMeta ~= nil and valueMeta.__fmtDebug ~= nil then
 			-- This type implement's the metamethod we made up to line up with
 			-- Rust's 'Debug' trait.
 

plugin/http/Error.lua

@@ -3,12 +3,12 @@ Error.__index = Error
 
 Error.Kind = {
 	HttpNotEnabled = {
-		message = "Rojo requires HTTP access, which is not enabled.\n" ..
+		message = "Rojo requires HTTP access, which is not enabled.\n"
-			"Check your game settings, located in the 'Home' tab of Studio.",
+			.. "Check your game settings, located in the 'Home' tab of Studio.",
 	},
 	ConnectFailed = {
-		message = "Couldn't connect to the Rojo server.\n" ..
+		message = "Couldn't connect to the Rojo server.\n"
-			"Make sure the server is running — use 'rojo serve' to run it!",
+			.. "Make sure the server is running — use 'rojo serve' to run it!",
 	},
 	Timeout = {
 		message = "HTTP request timed out.",
@@ -63,4 +63,13 @@ function Error.fromRobloxErrorString(message)
 	return Error.new(Error.Kind.Unknown, message)
 end
 
+function Error.fromResponse(response)
+	local lower = (response.body or ""):lower()
+	if response.code == 408 or response.code == 504 or lower:find("timed? ?out") then
+		return Error.new(Error.Kind.Timeout)
+	end
+
+	return Error.new(Error.Kind.Unknown, string.format("%s: %s", tostring(response.code), tostring(response.body)))
+end
+
 return Error

plugin/http/init.lua

@@ -30,8 +30,13 @@ local function performRequest(requestParams)
 			end)
 
 			if success then
-				Log.trace("Request {} success, status code {}", requestId, response.StatusCode)
+				Log.trace("Request {} success, response {:#?}", requestId, response)
-				resolve(HttpResponse.fromRobloxResponse(response))
+				local httpResponse = HttpResponse.fromRobloxResponse(response)
+				if httpResponse:isSuccess() then
+					resolve(httpResponse)
+				else
+					reject(HttpError.fromResponse(httpResponse))
+				end
 			else
 				Log.trace("Request {} failure: {:?}", requestId, response)
 				reject(HttpError.fromRobloxErrorString(response))

plugin/rbx_dom_lua/EncodedValue.lua

@@ -20,8 +20,8 @@ local function serializeFloat(value)
 	return value
 end
 
-local ALL_AXES = {"X", "Y", "Z"}
+local ALL_AXES = { "X", "Y", "Z" }
-local ALL_FACES = {"Right", "Top", "Back", "Left", "Bottom", "Front"}
+local ALL_FACES = { "Right", "Top", "Back", "Left", "Bottom", "Front" }
 
 local EncodedValue = {}
 
@@ -37,7 +37,10 @@ types = {
 				if ok then
 					output[key] = result
 				else
-					local warning = ("Could not decode attribute value of type %q: %s"):format(typeof(value), tostring(result))
+					local warning = ("Could not decode attribute value of type %q: %s"):format(
+						typeof(value),
+						tostring(result)
+					)
 					warn(warning)
 				end
 			end
@@ -53,7 +56,10 @@ types = {
 				if ok then
 					output[key] = result
 				else
-					local warning = ("Could not encode attribute value of type %q: %s"):format(typeof(value), tostring(result))
+					local warning = ("Could not encode attribute value of type %q: %s"):format(
+						typeof(value),
+						tostring(result)
+					)
 					warn(warning)
 				end
 			end
@@ -111,6 +117,7 @@ types = {
 			local pos = pod.position
 			local orient = pod.orientation
 
+			--stylua: ignore
 			return CFrame.new(
 				pos[1], pos[2], pos[3],
 				orient[1][1], orient[1][2], orient[1][3],
@@ -120,17 +127,14 @@ types = {
 		end,
 
 		toPod = function(roblox)
-			local x, y, z,
+			local x, y, z, r00, r01, r02, r10, r11, r12, r20, r21, r22 = roblox:GetComponents()
-				r00, r01, r02,
-				r10, r11, r12,
-				r20, r21, r22 = roblox:GetComponents()
 
 			return {
-				position = {x, y, z},
+				position = { x, y, z },
 				orientation = {
-					{r00, r01, r02},
+					{ r00, r01, r02 },
-					{r10, r11, r12},
+					{ r10, r11, r12 },
-					{r20, r21, r22},
+					{ r20, r21, r22 },
 				},
 			}
 		end,
@@ -140,7 +144,7 @@ types = {
 		fromPod = unpackDecoder(Color3.new),
 
 		toPod = function(roblox)
-			return {roblox.r, roblox.g, roblox.b}
+			return { roblox.r, roblox.g, roblox.b }
 		end,
 	},
 
@@ -161,10 +165,7 @@ types = {
 			local keypoints = {}
 
 			for index, keypoint in ipairs(pod.keypoints) do
-				keypoints[index] = ColorSequenceKeypoint.new(
+				keypoints[index] = ColorSequenceKeypoint.new(keypoint.time, types.Color3.fromPod(keypoint.color))
-					keypoint.time,
-					types.Color3.fromPod(keypoint.color)
-				)
 			end
 
 			return ColorSequence.new(keypoints)
@@ -187,6 +188,38 @@ types = {
 	},
 
 	Content = {
+		fromPod = function(pod): Content
+			if type(pod) == "string" then
+				if pod == "None" then
+					return Content.none
+				else
+					error(`unexpected Content value '{pod}'`)
+				end
+			else
+				local ty, value = next(pod)
+				if ty == "Uri" then
+					return Content.fromUri(value)
+				elseif ty == "Object" then
+					error("Object deserializing is not currently implemented")
+				else
+					error(`Unknown Content type '{ty}' (could not deserialize)`)
+				end
+			end
+		end,
+		toPod = function(roblox: Content)
+			if roblox.SourceType == Enum.ContentSourceType.None then
+				return "None"
+			elseif roblox.SourceType == Enum.ContentSourceType.Uri then
+				return { Uri = roblox.Uri }
+			elseif roblox.SourceType == Enum.ContentSourceType.Object then
+				error("Object serializing is not currently implemented")
+			else
+				error(`Unknown Content type '{roblox.SourceType} (could not serialize)`)
+			end
+		end,
+	},
+
+	ContentId = {
 		fromPod = identity,
 		toPod = identity,
 	},
@@ -204,6 +237,19 @@ types = {
 		end,
 	},
 
+	EnumItem = {
+		fromPod = function(pod)
+			return Enum[pod.type]:FromValue(pod.value)
+		end,
+
+		toPod = function(roblox)
+			return {
+				type = tostring(roblox.EnumType),
+				value = roblox.Value,
+			}
+		end,
+	},
+
 	Faces = {
 		fromPod = function(pod)
 			local faces = {}
@@ -238,6 +284,23 @@ types = {
 		toPod = serializeFloat,
 	},
 
+	Font = {
+		fromPod = function(pod)
+			return Font.new(
+				pod.family,
+				if pod.weight ~= nil then Enum.FontWeight[pod.weight] else nil,
+				if pod.style ~= nil then Enum.FontStyle[pod.style] else nil
+			)
+		end,
+		toPod = function(roblox)
+			return {
+				family = roblox.Family,
+				weight = roblox.Weight.Name,
+				style = roblox.Style.Name,
+			}
+		end,
+	},
+
 	Int32 = {
 		fromPod = identity,
 		toPod = identity,
@@ -248,11 +311,32 @@ types = {
 		toPod = identity,
 	},
 
+	MaterialColors = {
+		fromPod = function(pod: { [string]: { number } })
+			local real = {}
+			for name, color in pod do
+				real[Enum.Material[name]] = Color3.fromRGB(color[1], color[2], color[3])
+			end
+			return real
+		end,
+		toPod = function(roblox: { [Enum.Material]: Color3 })
+			local pod = {}
+			for material, color in roblox do
+				pod[material.Name] = {
+					math.round(math.clamp(color.R, 0, 1) * 255),
+					math.round(math.clamp(color.G, 0, 1) * 255),
+					math.round(math.clamp(color.B, 0, 1) * 255),
+				}
+			end
+			return pod
+		end,
+	},
+
 	NumberRange = {
 		fromPod = unpackDecoder(NumberRange.new),
 
 		toPod = function(roblox)
-			return {roblox.Min, roblox.Max}
+			return { roblox.Min, roblox.Max }
 		end,
 	},
 
@@ -261,11 +345,12 @@ types = {
 			local keypoints = {}
 
 			for index, keypoint in ipairs(pod.keypoints) do
-				keypoints[index] = NumberSequenceKeypoint.new(
+				-- TODO: Add a test for NaN or Infinity values and envelopes
-					keypoint.time,
+				-- Right now it isn't possible because it'd fail the roundtrip.
-					keypoint.value,
+				-- It's more important that it works right now, though.
-					keypoint.envelope
+				local value = keypoint.value or 0
-				)
+				local envelope = keypoint.envelope or 0
+				keypoints[index] = NumberSequenceKeypoint.new(keypoint.time, value, envelope)
 			end
 
 			return NumberSequence.new(keypoints)
@@ -293,13 +378,26 @@ types = {
 			if pod == "Default" then
 				return nil
 			else
-				return PhysicalProperties.new(
+				-- Passing `nil` instead of not passing anything gives
-					pod.density,
+				-- different results, so we have to branch here.
-					pod.friction,
+				if pod.acousticAbsorption then
-					pod.elasticity,
+					return (PhysicalProperties.new :: any)(
-					pod.frictionWeight,
+						pod.density,
-					pod.elasticityWeight
+						pod.friction,
-				)
+						pod.elasticity,
+						pod.frictionWeight,
+						pod.elasticityWeight,
+						pod.acousticAbsorption
+					)
+				else
+					return PhysicalProperties.new(
+						pod.density,
+						pod.friction,
+						pod.elasticity,
+						pod.frictionWeight,
+						pod.elasticityWeight
+					)
+				end
 			end
 		end,
 
@@ -313,6 +411,7 @@ types = {
 					elasticity = roblox.Elasticity,
 					frictionWeight = roblox.FrictionWeight,
 					elasticityWeight = roblox.ElasticityWeight,
+					acousticAbsorption = roblox.AcousticAbsorption,
 				}
 			end
 		end,
@@ -320,10 +419,7 @@ types = {
 
 	Ray = {
 		fromPod = function(pod)
-			return Ray.new(
+			return Ray.new(types.Vector3.fromPod(pod.origin), types.Vector3.fromPod(pod.direction))
-				types.Vector3.fromPod(pod.origin),
-				types.Vector3.fromPod(pod.direction)
-			)
 		end,
 
 		toPod = function(roblox)
@@ -336,10 +432,7 @@ types = {
 
 	Rect = {
 		fromPod = function(pod)
-			return Rect.new(
+			return Rect.new(types.Vector2.fromPod(pod[1]), types.Vector2.fromPod(pod[2]))
-				types.Vector2.fromPod(pod[1]),
-				types.Vector2.fromPod(pod[2])
-			)
 		end,
 
 		toPod = function(roblox)
@@ -351,31 +444,28 @@ types = {
 	},
 
 	Ref = {
-		fromPod = function(_pod)
+		fromPod = function(_)
 			error("Ref cannot be decoded on its own")
 		end,
 
-		toPod = function(_roblox)
+		toPod = function(_)
 			error("Ref can not be encoded on its own")
 		end,
 	},
 
 	Region3 = {
-		fromPod = function(pod)
+		fromPod = function(_)
 			error("Region3 is not implemented")
 		end,
 
-		toPod = function(roblox)
+		toPod = function(_)
 			error("Region3 is not implemented")
 		end,
 	},
 
 	Region3int16 = {
 		fromPod = function(pod)
-			return Region3int16.new(
+			return Region3int16.new(types.Vector3int16.fromPod(pod[1]), types.Vector3int16.fromPod(pod[2]))
-				types.Vector3int16.fromPod(pod[1]),
-				types.Vector3int16.fromPod(pod[2])
-			)
 		end,
 
 		toPod = function(roblox)
@@ -387,11 +477,11 @@ types = {
 	},
 
 	SharedString = {
-		fromPod = function(pod)
+		fromPod = function(_pod)
 			error("SharedString is not supported")
 		end,
 
-		toPod = function(roblox)
+		toPod = function(_roblox)
 			error("SharedString is not supported")
 		end,
 	},
@@ -405,16 +495,13 @@ types = {
 		fromPod = unpackDecoder(UDim.new),
 
 		toPod = function(roblox)
-			return {roblox.Scale, roblox.Offset}
+			return { roblox.Scale, roblox.Offset }
 		end,
 	},
 
 	UDim2 = {
 		fromPod = function(pod)
-			return UDim2.new(
+			return UDim2.new(types.UDim.fromPod(pod[1]), types.UDim.fromPod(pod[2]))
-				types.UDim.fromPod(pod[1]),
-				types.UDim.fromPod(pod[2])
-			)
 		end,
 
 		toPod = function(roblox)
@@ -445,7 +532,7 @@ types = {
 		fromPod = unpackDecoder(Vector2int16.new),
 
 		toPod = function(roblox)
-			return {roblox.X, roblox.Y}
+			return { roblox.X, roblox.Y }
 		end,
 	},
 
@@ -465,14 +552,37 @@ types = {
 		fromPod = unpackDecoder(Vector3int16.new),
 
 		toPod = function(roblox)
-			return {roblox.X, roblox.Y, roblox.Z}
+			return { roblox.X, roblox.Y, roblox.Z }
 		end,
 	},
 }
 
+types.OptionalCFrame = {
+	fromPod = function(pod)
+		if pod == nil then
+			return nil
+		else
+			return types.CFrame.fromPod(pod)
+		end
+	end,
+
+	toPod = function(roblox)
+		if roblox == nil then
+			return nil
+		else
+			return types.CFrame.toPod(roblox)
+		end
+	end,
+}
+
 function EncodedValue.decode(encodedValue)
 	local ty, value = next(encodedValue)
 
+	if ty == nil then
+		-- If the encoded pair is empty, assume it is an unoccupied optional value
+		return true, nil
+	end
+
 	local typeImpl = types[ty]
 	if typeImpl == nil then
 		return false, "Couldn't decode value " .. tostring(ty)

plugin/rbx_dom_lua/EncodedValue.spec.lua

@@ -1,72 +0,0 @@
-return function()
-	local HttpService = game:GetService("HttpService")
-	
-	local EncodedValue = require(script.Parent.EncodedValue)
-	local allValues = require(script.Parent.allValues)
-
-	local function deepEq(a, b)
-		if typeof(a) ~= typeof(b) then
-			return false
-		end
-
-		local ty = typeof(a)
-
-		if ty == "table" then
-			local visited = {}
-			
-			for key, valueA in pairs(a) do
-				visited[key] = true
-				
-				if not deepEq(valueA, b[key]) then
-					return false
-				end
-			end
-
-			for key, valueB in pairs(b) do
-				if visited[key] then
-					continue
-				end
-
-				if not deepEq(valueB, a[key]) then
-					return false
-				end
-			end
-
-			return true
-		else
-			return a == b
-		end
-	end
-
-	local extraAssertions = {
-		CFrame = function(value)
-			expect(value).to.equal(CFrame.new(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12))
-		end,
-	}
-
-	for testName, testEntry in pairs(allValues) do
-		it("round trip " .. testName, function()
-			local ok, decoded = EncodedValue.decode(testEntry.value)
-			assert(ok, decoded)
-
-			if extraAssertions[testName] ~= nil then
-				extraAssertions[testName](decoded)
-			end
-
-			local ok, encoded = EncodedValue.encode(decoded, testEntry.ty)
-			assert(ok, encoded)
-
-			if not deepEq(encoded, testEntry.value) then
-				local expected = HttpService:JSONEncode(testEntry.value)
-				local actual = HttpService:JSONEncode(encoded)
-
-				local message = string.format(
-					"Round-trip results did not match.\nExpected:\n%s\nActual:\n%s",
-					expected, actual
-				)
-
-				error(message)
-			end
-		end)
-	end
-end

plugin/rbx_dom_lua/Error.lua

@@ -5,6 +5,7 @@ Error.Kind = {
 	UnknownProperty = "UnknownProperty",
 	PropertyNotReadable = "PropertyNotReadable",
 	PropertyNotWritable = "PropertyNotWritable",
+	CannotParseBinaryString = "CannotParseBinaryString",
 	Roblox = "Roblox",
 }
 

plugin/rbx_dom_lua/PropertyDescriptor.lua

@@ -53,6 +53,11 @@ function PropertyDescriptor:read(instance)
 	end
 
 	if self.scriptability == "Custom" then
+		if customProperties[self.className] == nil then
+			local fullName = ("%s.%s"):format(instance.className, self.name)
+			return false, Error.new(Error.Kind.PropertyNotReadable, fullName)
+		end
+
 		local interface = customProperties[self.className][self.name]
 
 		return interface.read(instance, self.name)
@@ -79,6 +84,11 @@ function PropertyDescriptor:write(instance, value)
 	end
 
 	if self.scriptability == "Custom" then
+		if customProperties[self.className] == nil then
+			local fullName = ("%s.%s"):format(instance.className, self.name)
+			return false, Error.new(Error.Kind.PropertyNotWritable, fullName)
+		end
+
 		local interface = customProperties[self.className][self.name]
 
 		return interface.write(instance, self.name, value)

plugin/rbx_dom_lua/allValues.json

@@ -15,6 +15,12 @@
             0.0
           ]
         },
+        "TestEnumItem": {
+          "EnumItem": {
+            "type": "Material",
+            "value": 256
+          }
+        },
         "TestNumber": {
           "Float64": 1337.0
         },
@@ -170,9 +176,23 @@
     },
     "ty": "ColorSequence"
   },
-  "Content": {
+  "ContentId": {
     "value": {
-      "Content": "rbxassetid://12345"
+      "ContentId": "rbxassetid://12345"
+    },
+    "ty": "ContentId"
+  },
+  "Content_None": {
+    "value": {
+      "Content": "None"
+    },
+    "ty": "Content"
+  },
+  "Content_Uri": {
+    "value": {
+      "Content": {
+        "Uri": "rbxasset://abc/123.rojo"
+      }
     },
     "ty": "Content"
   },
@@ -182,6 +202,15 @@
     },
     "ty": "Enum"
   },
+  "EnumItem": {
+    "value": {
+      "EnumItem": {
+        "type": "Material",
+        "value": 256
+      }
+    },
+    "ty": "EnumItem"
+  },
   "Faces": {
     "value": {
       "Faces": [
@@ -207,6 +236,17 @@
     },
     "ty": "Float64"
   },
+  "Font": {
+    "value": {
+      "Font": {
+        "family": "rbxasset://fonts/families/SourceSansPro.json",
+        "weight": "Regular",
+        "style": "Normal",
+        "cachedFaceId": null
+      }
+    },
+    "ty": "Font"
+  },
   "Int32": {
     "value": {
       "Int32": 6014
@@ -219,6 +259,118 @@
     },
     "ty": "Int64"
   },
+  "MaterialColors": {
+    "value": {
+      "MaterialColors": {
+        "Grass": [
+          106,
+          127,
+          63
+        ],
+        "Slate": [
+          63,
+          127,
+          107
+        ],
+        "Concrete": [
+          127,
+          102,
+          63
+        ],
+        "Brick": [
+          138,
+          86,
+          62
+        ],
+        "Sand": [
+          143,
+          126,
+          95
+        ],
+        "WoodPlanks": [
+          139,
+          109,
+          79
+        ],
+        "Rock": [
+          102,
+          108,
+          111
+        ],
+        "Glacier": [
+          101,
+          176,
+          234
+        ],
+        "Snow": [
+          195,
+          199,
+          218
+        ],
+        "Sandstone": [
+          137,
+          90,
+          71
+        ],
+        "Mud": [
+          58,
+          46,
+          36
+        ],
+        "Basalt": [
+          30,
+          30,
+          37
+        ],
+        "Ground": [
+          102,
+          92,
+          59
+        ],
+        "CrackedLava": [
+          232,
+          156,
+          74
+        ],
+        "Asphalt": [
+          115,
+          123,
+          107
+        ],
+        "Cobblestone": [
+          132,
+          123,
+          90
+        ],
+        "Ice": [
+          129,
+          194,
+          224
+        ],
+        "LeafyGrass": [
+          115,
+          132,
+          74
+        ],
+        "Salt": [
+          198,
+          189,
+          181
+        ],
+        "Limestone": [
+          206,
+          173,
+          148
+        ],
+        "Pavement": [
+          148,
+          148,
+          140
+        ]
+      }
+    },
+    "ty": "MaterialColors"
+  },
   "NumberRange": {
     "value": {
       "NumberRange": [
@@ -247,6 +399,41 @@
     },
     "ty": "NumberSequence"
   },
+  "OptionalCFrame-None": {
+    "value": {
+      "OptionalCFrame": null
+    },
+    "ty": "OptionalCFrame"
+  },
+  "OptionalCFrame-Some": {
+    "value": {
+      "OptionalCFrame": {
+        "position": [
+          0.0,
+          0.0,
+          0.0
+        ],
+        "orientation": [
+          [
+            1.0,
+            0.0,
+            0.0
+          ],
+          [
+            0.0,
+            1.0,
+            0.0
+          ],
+          [
+            0.0,
+            0.0,
+            1.0
+          ]
+        ]
+      }
+    },
+    "ty": "OptionalCFrame"
+  },
   "PhysicalProperties-Custom": {
     "value": {
       "PhysicalProperties": {
@@ -254,7 +441,8 @@
         "friction": 1.0,
         "elasticity": 0.0,
         "frictionWeight": 50.0,
-        "elasticityWeight": 25.0
+        "elasticityWeight": 25.0,
+        "acousticAbsorption": 0.15625
       }
     },
     "ty": "PhysicalProperties"

plugin/rbx_dom_lua/base64.lua

@@ -1,139 +1,10 @@
--- Thanks to Tiffany352 for this base64 implementation!
+local EncodingService = game:GetService("EncodingService")
-
-local floor = math.floor
-local char = string.char
-
-local function encodeBase64(str)
-	local out = {}
-	local nOut = 0
-	local alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
-	local strLen = #str
-
-	-- 3 octets become 4 hextets
-	for i = 1, strLen - 2, 3 do
-		local b1, b2, b3 = str:byte(i, i + 3)
-		local word = b3 + b2 * 256 + b1 * 256 * 256
-
-		local h4 = word % 64 + 1
-		word = floor(word / 64)
-		local h3 = word % 64 + 1
-		word = floor(word / 64)
-		local h2 = word % 64 + 1
-		word = floor(word / 64)
-		local h1 = word % 64 + 1
-
-		out[nOut + 1] = alphabet:sub(h1, h1)
-		out[nOut + 2] = alphabet:sub(h2, h2)
-		out[nOut + 3] = alphabet:sub(h3, h3)
-		out[nOut + 4] = alphabet:sub(h4, h4)
-		nOut = nOut + 4
-	end
-
-	local remainder = strLen % 3
-
-	if remainder == 2 then
-		-- 16 input bits -> 3 hextets (2 full, 1 partial)
-		local b1, b2 = str:byte(-2, -1)
-		-- partial is 4 bits long, leaving 2 bits of zero padding ->
-		-- offset = 4
-		local word = b2 * 4 + b1 * 4 * 256
-
-		local h3 = word % 64 + 1
-		word = floor(word / 64)
-		local h2 = word % 64 + 1
-		word = floor(word / 64)
-		local h1 = word % 64 + 1
-
-		out[nOut + 1] = alphabet:sub(h1, h1)
-		out[nOut + 2] = alphabet:sub(h2, h2)
-		out[nOut + 3] = alphabet:sub(h3, h3)
-		out[nOut + 4] = "="
-	elseif remainder == 1 then
-		-- 8 input bits -> 2 hextets (2 full, 1 partial)
-		local b1 = str:byte(-1, -1)
-		-- partial is 2 bits long, leaving 4 bits of zero padding ->
-		-- offset = 16
-		local word = b1 * 16
-
-		local h2 = word % 64 + 1
-		word = floor(word / 64)
-		local h1 = word % 64 + 1
-
-		out[nOut + 1] = alphabet:sub(h1, h1)
-		out[nOut + 2] = alphabet:sub(h2, h2)
-		out[nOut + 3] = "="
-		out[nOut + 4] = "="
-	end
-	-- if the remainder is 0, then no work is needed
-
-	return table.concat(out, "")
-end
-
-local function decodeBase64(str)
-	local out = {}
-	local nOut = 0
-	local alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
-	local strLen = #str
-	local acc = 0
-	local nAcc = 0
-
-	local alphabetLut = {}
-	for i = 1, #alphabet do
-		alphabetLut[alphabet:sub(i, i)] = i - 1
-	end
-
-	-- 4 hextets become 3 octets
-	for i = 1, strLen do
-		local ch = str:sub(i, i)
-		local byte = alphabetLut[ch]
-		if byte then
-			acc = acc * 64 + byte
-			nAcc = nAcc + 1
-		end
-
-		if nAcc == 4 then
-			local b3 = acc % 256
-			acc = floor(acc / 256)
-			local b2 = acc % 256
-			acc = floor(acc / 256)
-			local b1 = acc % 256
-
-			out[nOut + 1] = char(b1)
-			out[nOut + 2] = char(b2)
-			out[nOut + 3] = char(b3)
-			nOut = nOut + 3
-			nAcc = 0
-			acc = 0
-		end
-	end
-
-	if nAcc == 3 then
-		-- 3 hextets -> 16 bit output
-		acc = acc * 64
-		acc = floor(acc / 256)
-		local b2 = acc % 256
-		acc = floor(acc / 256)
-		local b1 = acc % 256
-
-		out[nOut + 1] = char(b1)
-		out[nOut + 2] = char(b2)
-	elseif nAcc == 2 then
-		-- 2 hextets -> 8 bit output
-		acc = acc * 64
-		acc = floor(acc / 256)
-		acc = acc * 64
-		acc = floor(acc / 256)
-		local b1 = acc % 256
-
-		out[nOut + 1] = char(b1)
-	elseif nAcc == 1 then
-		error("Base64 has invalid length")
-	end
-
-	return table.concat(out, "")
-end
 
 return {
-	decode = decodeBase64,
+	decode = function(input: string)
-	encode = encodeBase64,
+		return buffer.tostring(EncodingService:Base64Decode(buffer.fromstring(input)))
+	end,
+	encode = function(input: string)
+		return buffer.tostring(EncodingService:Base64Encode(buffer.fromstring(input)))
+	end,
 }

plugin/rbx_dom_lua/base64.spec.lua

@@ -1,29 +0,0 @@
-return function()
-	local base64 = require(script.Parent.base64)
-
-	it("should encode and decode", function()
-		local function try(str, expected)
-			local encoded = base64.encode(str)
-			expect(encoded).to.equal(expected)
-			expect(base64.decode(encoded)).to.equal(str)
-		end
-
-		try("Man", "TWFu")
-		try("Ma", "TWE=")
-		try("M", "TQ==")
-		try("ManM", "TWFuTQ==")
-		try(
-			[[Man is distinguished, not only by his reason, but by this ]]..
-			[[singular passion from other animals, which is a lust of the ]]..
-			[[mind, that by a perseverance of delight in the continued and ]]..
-			[[indefatigable generation of knowledge, exceeds the short ]]..
-			[[vehemence of any carnal pleasure.]],
-			[[TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sI]]..
-			[[GJ1dCBieSB0aGlzIHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYW]]..
-			[[xzLCB3aGljaCBpcyBhIGx1c3Qgb2YgdGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJ]]..
-			[[zZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGludWVkIGFuZCBpbmRl]]..
-			[[ZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRoZ]]..
-			[[SBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4=]]
-		)
-	end)
-end

plugin/rbx_dom_lua/customProperties.lua

@@ -1,4 +1,47 @@
 local CollectionService = game:GetService("CollectionService")
+local ScriptEditorService = game:GetService("ScriptEditorService")
+
+local Error = require(script.Parent.Error)
+
+--- A list of `Enum.Material` values that are used for Terrain.MaterialColors
+local TERRAIN_MATERIAL_COLORS = {
+	Enum.Material.Grass,
+	Enum.Material.Slate,
+	Enum.Material.Concrete,
+	Enum.Material.Brick,
+	Enum.Material.Sand,
+	Enum.Material.WoodPlanks,
+	Enum.Material.Rock,
+	Enum.Material.Glacier,
+	Enum.Material.Snow,
+	Enum.Material.Sandstone,
+	Enum.Material.Mud,
+	Enum.Material.Basalt,
+	Enum.Material.Ground,
+	Enum.Material.CrackedLava,
+	Enum.Material.Asphalt,
+	Enum.Material.Cobblestone,
+	Enum.Material.Ice,
+	Enum.Material.LeafyGrass,
+	Enum.Material.Salt,
+	Enum.Material.Limestone,
+	Enum.Material.Pavement,
+}
+
+local function isAttributeNameValid(attributeName)
+	-- For SetAttribute to succeed, the attribute name must be less than or
+	-- equal to 100 characters...
+	return #attributeName <= 100
+		-- ...and must only contain alphanumeric characters, periods, hyphens,
+		-- underscores, or forward slashes.
+		and attributeName:match("[^%w%.%-_/]") == nil
+end
+
+local function isAttributeNameReserved(attributeName)
+	-- For SetAttribute to succeed, attribute names must not use the RBX
+	-- prefix, which is reserved by Roblox.
+	return attributeName:sub(1, 3) == "RBX"
+end
 
 -- Defines how to read and write properties that aren't directly scriptable.
 --
@@ -10,19 +53,45 @@ return {
 				return true, instance:GetAttributes()
 			end,
 			write = function(instance, _, value)
-				local existing = instance:GetAttributes()
+				if typeof(value) ~= "table" then
-
+					return false, Error.new(Error.Kind.CannotParseBinaryString)
-				for key, attr in pairs(value) do
-					instance:SetAttribute(key, attr)
 				end
 
-				for key in pairs(existing) do
+				local existing = instance:GetAttributes()
-					if value[key] == nil then
+				local didAllWritesSucceed = true
-						instance:SetAttribute(key, nil)
+
+				for attributeName, attributeValue in pairs(value) do
+					if isAttributeNameReserved(attributeName) then
+						-- If the attribute name is reserved, then we don't
+						-- really care about reporting any failures about
+						-- it.
+						continue
+					end
+
+					if not isAttributeNameValid(attributeName) then
+						didAllWritesSucceed = false
+						continue
+					end
+
+					instance:SetAttribute(attributeName, attributeValue)
+				end
+
+				for existingAttributeName in pairs(existing) do
+					if isAttributeNameReserved(existingAttributeName) then
+						continue
+					end
+
+					if not isAttributeNameValid(existingAttributeName) then
+						didAllWritesSucceed = false
+						continue
+					end
+
+					if value[existingAttributeName] == nil then
+						instance:SetAttribute(existingAttributeName, nil)
 					end
 				end
 
-				return true
+				return didAllWritesSucceed
 			end,
 		},
 		Tags = {
@@ -52,13 +121,117 @@ return {
 	},
 	LocalizationTable = {
 		Contents = {
-			read = function(instance, key)
+			read = function(instance, _)
 				return true, instance:GetContents()
 			end,
-			write = function(instance, key, value)
+			write = function(instance, _, value)
 				instance:SetContents(value)
 				return true
 			end,
 		},
 	},
+	Model = {
+		Scale = {
+			read = function(instance, _, _)
+				return true, instance:GetScale()
+			end,
+			write = function(instance, _, value)
+				return true, instance:ScaleTo(value)
+			end,
+		},
+		WorldPivotData = {
+			read = function(instance)
+				return true, instance.WorldPivot
+			end,
+			write = function(instance, _, value)
+				if value == nil then
+					return true, nil
+				else
+					instance.WorldPivot = value
+					return true
+				end
+			end,
+		},
+	},
+	Terrain = {
+		MaterialColors = {
+			read = function(instance: Terrain)
+				-- There's no way to get a list of every color, so we have to
+				-- make one.
+				local colors = {}
+				for _, material in TERRAIN_MATERIAL_COLORS do
+					colors[material] = instance:GetMaterialColor(material)
+				end
+
+				return true, colors
+			end,
+			write = function(instance: Terrain, _, value: { [Enum.Material]: Color3 })
+				if typeof(value) ~= "table" then
+					return false, Error.new(Error.Kind.CannotParseBinaryString)
+				end
+
+				for material, color in value do
+					instance:SetMaterialColor(material, color)
+				end
+
+				return true
+			end,
+		},
+	},
+	Script = {
+		Source = {
+			read = function(instance: Script)
+				return true, ScriptEditorService:GetEditorSource(instance)
+			end,
+			write = function(instance: Script, _, value: string)
+				task.spawn(function()
+					ScriptEditorService:UpdateSourceAsync(instance, function()
+						return value
+					end)
+				end)
+				return true
+			end,
+		},
+	},
+	ModuleScript = {
+		Source = {
+			read = function(instance: ModuleScript)
+				return true, ScriptEditorService:GetEditorSource(instance)
+			end,
+			write = function(instance: ModuleScript, _, value: string)
+				task.spawn(function()
+					ScriptEditorService:UpdateSourceAsync(instance, function()
+						return value
+					end)
+				end)
+				return true
+			end,
+		},
+	},
+	StyleRule = {
+		PropertiesSerialize = {
+			read = function(instance: StyleRule)
+				return true, instance:GetProperties()
+			end,
+			write = function(instance: StyleRule, _, value: { [any]: any })
+				if typeof(value) ~= "table" then
+					return false, Error.new(Error.Kind.CannotParseBinaryString)
+				end
+
+				local existing = instance:GetProperties()
+
+				for itemName, itemValue in pairs(value) do
+					instance:SetProperty(itemName, itemValue)
+				end
+
+				for existingItemName in pairs(existing) do
+					if value[existingItemName] == nil then
+						instance:SetProperty(existingItemName, nil)
+					end
+				end
+
+				return true
+			end,
+		},
+	},
 }

plugin/rbx_dom_lua/init.lua

@@ -24,7 +24,8 @@ local function findCanonicalPropertyDescriptor(className, propertyName)
 				return PropertyDescriptor.fromRaw(
 					currentClass.Properties[aliasData.AliasFor],
 					currentClassName,
-					aliasData.AliasFor)
+					aliasData.AliasFor
+				)
 			end
 
 			return nil

plugin/rbx_dom_lua/init.spec.lua

@@ -1,7 +0,0 @@
-return function()
-	local RbxDom = require(script.Parent)
-
-	it("should load", function()
-		expect(RbxDom).to.be.ok()
-	end)
-end

plugin/run-tests.server.lua

@@ -1,19 +1,11 @@
 local ReplicatedStorage = game:GetService("ReplicatedStorage")
 
-local TestEZ = require(ReplicatedStorage.Packages.TestEZ)
+local TestEZ = require(ReplicatedStorage.Packages:WaitForChild("TestEZ", 10))
 
 local Rojo = ReplicatedStorage.Rojo
 
-local DevSettings = require(Rojo.Plugin.DevSettings)
+local Settings = require(Rojo.Plugin.Settings)
-
+Settings:set("logLevel", "Trace")
-local setDevSettings = not DevSettings:hasChangedValues()
+Settings:set("typecheckingEnabled", true)
-
-if setDevSettings then
-	DevSettings:createTestSettings()
-end
 
 require(Rojo.Plugin.runTests)(TestEZ)
-
-if setDevSettings then
-	DevSettings:resetValues()
-end

plugin/src/ApiContext.lua

@@ -1,4 +1,5 @@
 local Packages = script.Parent.Parent.Packages
+local HttpService = game:GetService("HttpService")
 local Http = require(Packages.Http)
 local Log = require(Packages.Log)
 local Promise = require(Packages.Promise)
@@ -9,14 +10,9 @@ local Version = require(script.Parent.Version)
 
 local validateApiInfo = Types.ifEnabled(Types.ApiInfoResponse)
 local validateApiRead = Types.ifEnabled(Types.ApiReadResponse)
-local validateApiSubscribe = Types.ifEnabled(Types.ApiSubscribeResponse)
+local validateApiSocketPacket = Types.ifEnabled(Types.ApiSocketPacket)
-
+local validateApiSerialize = Types.ifEnabled(Types.ApiSerializeResponse)
---[[
+local validateApiRefPatch = Types.ifEnabled(Types.ApiRefPatchResponse)
-	Returns a promise that will never resolve nor reject.
-]]
-local function hangingPromise()
-	return Promise.new(function() end)
-end
 
 local function rejectFailedRequests(response)
 	if response.code >= 400 then
@@ -31,15 +27,17 @@ end
 local function rejectWrongProtocolVersion(infoResponseBody)
 	if infoResponseBody.protocolVersion ~= Config.protocolVersion then
 		local message = (
-			"Found a Rojo dev server, but it's using a different protocol version, and is incompatible." ..
+			"Found a Rojo dev server, but it's using a different protocol version, and is incompatible."
-			"\nMake sure you have matching versions of both the Rojo plugin and server!" ..
+			.. "\nMake sure you have matching versions of both the Rojo plugin and server!"
-			"\n\nYour client is version %s, with protocol version %s. It expects server version %s." ..
+			.. "\n\nYour client is version %s, with protocol version %s. It expects server version %s."
-			"\nYour server is version %s, with protocol version %s." ..
+			.. "\nYour server is version %s, with protocol version %s."
-			"\n\nGo to https://github.com/rojo-rbx/rojo for more details."
+			.. "\n\nGo to https://github.com/rojo-rbx/rojo for more details."
 		):format(
-			Version.display(Config.version), Config.protocolVersion,
+			Version.display(Config.version),
+			Config.protocolVersion,
 			Config.expectedServerVersionString,
-			infoResponseBody.serverVersion, infoResponseBody.protocolVersion
+			infoResponseBody.serverVersion,
+			infoResponseBody.protocolVersion
 		)
 
 		return Promise.reject(message)
@@ -50,14 +48,7 @@ end
 
 local function rejectWrongPlaceId(infoResponseBody)
 	if infoResponseBody.expectedPlaceIds ~= nil then
-		local foundId = false
+		local foundId = table.find(infoResponseBody.expectedPlaceIds, game.PlaceId)
-
-		for _, id in ipairs(infoResponseBody.expectedPlaceIds) do
-			if id == game.PlaceId then
-				foundId = true
-				break
-			end
-		end
 
 		if not foundId then
 			local idList = {}
@@ -66,14 +57,31 @@ local function rejectWrongPlaceId(infoResponseBody)
 			end
 
 			local message = (
-				"Found a Rojo server, but its project is set to only be used with a specific list of places." ..
+				"Found a Rojo server, but its project is set to only be used with a specific list of places."
-				"\nYour place ID is %s, but needs to be one of these:" ..
+				.. "\nYour place ID is %u, but needs to be one of these:"
-				"\n%s" ..
+				.. "\n%s"
-				"\n\nTo change this list, edit 'servePlaceIds' in your .project.json file."
+				.. "\n\nTo change this list, edit 'servePlaceIds' in your .project.json file."
-			):format(
+			):format(game.PlaceId, table.concat(idList, "\n"))
-				tostring(game.PlaceId),
+
-				table.concat(idList, "\n")
+			return Promise.reject(message)
-			)
+		end
+	end
+
+	if infoResponseBody.unexpectedPlaceIds ~= nil then
+		local foundId = table.find(infoResponseBody.unexpectedPlaceIds, game.PlaceId)
+
+		if foundId then
+			local idList = {}
+			for _, id in ipairs(infoResponseBody.unexpectedPlaceIds) do
+				table.insert(idList, "- " .. tostring(id))
+			end
+
+			local message = (
+				"Found a Rojo server, but its project is set to not be used with a specific list of places."
+				.. "\nYour place ID is %u, but needs to not be one of these:"
+				.. "\n%s"
+				.. "\n\nTo change this list, edit 'blockedPlaceIds' in your .project.json file."
+			):format(game.PlaceId, table.concat(idList, "\n"))
 
 			return Promise.reject(message)
 		end
@@ -92,7 +100,9 @@ function ApiContext.new(baseUrl)
 		__baseUrl = baseUrl,
 		__sessionId = nil,
 		__messageCursor = -1,
+		__wsClient = nil,
 		__connected = true,
+		__activeRequests = {},
 	}
 
 	return setmetatable(self, ApiContext)
@@ -113,6 +123,17 @@ end
 
 function ApiContext:disconnect()
 	self.__connected = false
+	for request in self.__activeRequests do
+		Log.trace("Cancelling request {}", request)
+		request:cancel()
+	end
+	self.__activeRequests = {}
+
+	if self.__wsClient then
+		Log.trace("Closing WebSocket client")
+		self.__wsClient:Close()
+	end
+	self.__wsClient = nil
 end
 
 function ApiContext:setMessageCursor(index)
@@ -142,18 +163,15 @@ end
 function ApiContext:read(ids)
 	local url = ("%s/api/read/%s"):format(self.__baseUrl, table.concat(ids, ","))
 
-	return Http.get(url)
+	return Http.get(url):andThen(rejectFailedRequests):andThen(Http.Response.json):andThen(function(body)
-		:andThen(rejectFailedRequests)
+		if body.sessionId ~= self.__sessionId then
-		:andThen(Http.Response.json)
+			return Promise.reject("Server changed ID")
-		:andThen(function(body)
+		end
-			if body.sessionId ~= self.__sessionId then
-				return Promise.reject("Server changed ID")
-			end
 
-			assert(validateApiRead(body))
+		assert(validateApiRead(body))
 
-			return body
+		return body
-		end)
+	end)
 end
 
 function ApiContext:write(patch)
@@ -190,62 +208,120 @@ function ApiContext:write(patch)
 
 	body = Http.jsonEncode(body)
 
-	return Http.post(url, body)
+	return Http.post(url, body):andThen(rejectFailedRequests):andThen(Http.Response.json):andThen(function(responseBody)
-		:andThen(rejectFailedRequests)
+		Log.info("Write response: {:?}", responseBody)
-		:andThen(Http.Response.json)
-		:andThen(function(body)
-			Log.info("Write response: {:?}", body)
 
-			return body
+		return responseBody
-		end)
+	end)
 end
 
-function ApiContext:retrieveMessages()
+function ApiContext:connectWebSocket(packetHandlers)
-	local url = ("%s/api/subscribe/%s"):format(self.__baseUrl, self.__messageCursor)
+	local url = ("%s/api/socket/%s"):format(self.__baseUrl, self.__messageCursor)
+	-- Convert HTTP/HTTPS URL to WS/WSS
+	url = url:gsub("^http://", "ws://"):gsub("^https://", "wss://")
 
-	local function sendRequest()
+	return Promise.new(function(resolve, reject)
-		return Http.get(url)
+		local success, wsClient =
-			:catch(function(err)
+			pcall(HttpService.CreateWebStreamClient, HttpService, Enum.WebStreamClientType.WebSocket, {
-				if err.type == Http.Error.Kind.Timeout then
+				Url = url,
-					if self.__connected then
+			})
-						return sendRequest()
+		if not success then
-					else
+			reject("Failed to create WebSocket client: " .. tostring(wsClient))
-						return hangingPromise()
+			return
-					end
+		end
-				end
+		self.__wsClient = wsClient
 
-				return Promise.reject(err)
+		local closed, errored, received
-			end)
-	end
 
-	return sendRequest()
+		received = self.__wsClient.MessageReceived:Connect(function(msg)
-		:andThen(rejectFailedRequests)
+			local data = Http.jsonDecode(msg)
-		:andThen(Http.Response.json)
+			if data.sessionId ~= self.__sessionId then
-		:andThen(function(body)
+				Log.warn("Received message with wrong session ID; ignoring")
-			if body.sessionId ~= self.__sessionId then
+				return
-				return Promise.reject("Server changed ID")
 			end
 
-			assert(validateApiSubscribe(body))
+			assert(validateApiSocketPacket(data))
 
-			self:setMessageCursor(body.messageCursor)
+			Log.trace("Received websocket packet: {:#?}", data)
 
-			return body.messages
+			local handler = packetHandlers[data.packetType]
+			if handler then
+				local ok, err = pcall(handler, data.body)
+				if not ok then
+					Log.error("Error in WebSocket packet handler for type '%s': %s", data.packetType, err)
+				end
+			else
+				Log.warn("No handler for WebSocket packet type '%s'", data.packetType)
+			end
 		end)
+
+		closed = self.__wsClient.Closed:Connect(function()
+			closed:Disconnect()
+			errored:Disconnect()
+			received:Disconnect()
+
+			if self.__connected then
+				reject("WebSocket connection closed unexpectedly")
+			else
+				resolve()
+			end
+		end)
+
+		errored = self.__wsClient.Error:Connect(function(code, msg)
+			closed:Disconnect()
+			errored:Disconnect()
+			received:Disconnect()
+
+			reject("WebSocket error: " .. code .. " - " .. msg)
+		end)
+	end)
 end
 
 function ApiContext:open(id)
 	local url = ("%s/api/open/%s"):format(self.__baseUrl, id)
 
-	return Http.post(url, "")
+	return Http.post(url, ""):andThen(rejectFailedRequests):andThen(Http.Response.json):andThen(function(body)
+		if body.sessionId ~= self.__sessionId then
+			return Promise.reject("Server changed ID")
+		end
+
+		return nil
+	end)
+end
+
+function ApiContext:serialize(ids: { string })
+	local url = ("%s/api/serialize"):format(self.__baseUrl)
+	local request_body = Http.jsonEncode({ sessionId = self.__sessionId, ids = ids })
+
+	return Http.post(url, request_body)
 		:andThen(rejectFailedRequests)
 		:andThen(Http.Response.json)
-		:andThen(function(body)
+		:andThen(function(response_body)
-			if body.sessionId ~= self.__sessionId then
+			if response_body.sessionId ~= self.__sessionId then
 				return Promise.reject("Server changed ID")
 			end
 
-			return nil
+			assert(validateApiSerialize(response_body))
+
+			return response_body
+		end)
+end
+
+function ApiContext:refPatch(ids: { string })
+	local url = ("%s/api/ref-patch"):format(self.__baseUrl)
+	local request_body = Http.jsonEncode({ sessionId = self.__sessionId, ids = ids })
+
+	return Http.post(url, request_body)
+		:andThen(rejectFailedRequests)
+		:andThen(Http.Response.json)
+		:andThen(function(response_body)
+			if response_body.sessionId ~= self.__sessionId then
+				return Promise.reject("Server changed ID")
+			end
+
+			assert(validateApiRefPatch(response_body))
+
+			return response_body
 		end)
 end
 

plugin/src/App/Components/BorderedContainer.lua

@@ -24,8 +24,10 @@ local function BorderedContainer(props)
 			layoutOrder = props.layoutOrder,
 		}, {
 			Content = e("Frame", {
-				Size = UDim2.new(1, 0, 1, 0),
+				Size = UDim2.new(1, -2, 1, -2),
+				Position = UDim2.new(0, 1, 0, 1),
 				BackgroundTransparency = 1,
+				ZIndex = 2,
 			}, props[Roact.Children]),
 
 			Border = e(SlicedImage, {

plugin/src/App/Components/Checkbox.lua

@@ -10,6 +10,7 @@ local Theme = require(Plugin.App.Theme)
 local bindingUtil = require(Plugin.App.bindingUtil)
 
 local SlicedImage = require(script.Parent.SlicedImage)
+local Tooltip = require(script.Parent.Tooltip)
 
 local e = Roact.createElement
 
@@ -22,18 +23,16 @@ end
 
 function Checkbox:didUpdate(lastProps)
 	if lastProps.active ~= self.props.active then
-		self.motor:setGoal(
+		self.motor:setGoal(Flipper.Spring.new(self.props.active and 1 or 0, {
-			Flipper.Spring.new(self.props.active and 1 or 0, {
+			frequency = 6,
-				frequency = 6,
+			dampingRatio = 1.1,
-				dampingRatio = 1.1,
+		}))
-			})
-		)
 	end
 end
 
 function Checkbox:render()
 	return Theme.with(function(theme)
-		theme = theme.Checkbox
+		local checkboxTheme = theme.Checkbox
 
 		local activeTransparency = Roact.joinBindings({
 			self.binding:map(function(value)
@@ -50,18 +49,29 @@ function Checkbox:render()
 			ZIndex = self.props.zIndex,
 			BackgroundTransparency = 1,
 
-			[Roact.Event.Activated] = self.props.onClick,
+			[Roact.Event.Activated] = function()
+				if self.props.locked then
+					return
+				end
+				self.props.onClick()
+			end,
 		}, {
+			StateTip = e(Tooltip.Trigger, {
+				text = (if self.props.locked
+					then (self.props.lockedTooltip or "(Cannot be changed right now)") .. "\n"
+					else "") .. (if self.props.active then "Enabled" else "Disabled"),
+			}),
+
 			Active = e(SlicedImage, {
 				slice = Assets.Slices.RoundedBackground,
-				color = theme.Active.BackgroundColor,
+				color = checkboxTheme.Active.BackgroundColor,
 				transparency = activeTransparency,
 				size = UDim2.new(1, 0, 1, 0),
 				zIndex = 2,
 			}, {
 				Icon = e("ImageLabel", {
-					Image = Assets.Images.Checkbox.Active,
+					Image = if self.props.locked then Assets.Images.Checkbox.Locked else Assets.Images.Checkbox.Active,
-					ImageColor3 = theme.Active.IconColor,
+					ImageColor3 = checkboxTheme.Active.IconColor,
 					ImageTransparency = activeTransparency,
 
 					Size = UDim2.new(0, 16, 0, 16),
@@ -74,13 +84,15 @@ function Checkbox:render()
 
 			Inactive = e(SlicedImage, {
 				slice = Assets.Slices.RoundedBorder,
-				color = theme.Inactive.BorderColor,
+				color = checkboxTheme.Inactive.BorderColor,
 				transparency = self.props.transparency,
 				size = UDim2.new(1, 0, 1, 0),
 			}, {
 				Icon = e("ImageLabel", {
-					Image = Assets.Images.Checkbox.Inactive,
+					Image = if self.props.locked
-					ImageColor3 = theme.Inactive.IconColor,
+						then Assets.Images.Checkbox.Locked
+						else Assets.Images.Checkbox.Inactive,
+					ImageColor3 = checkboxTheme.Inactive.IconColor,
 					ImageTransparency = self.props.transparency,
 
 					Size = UDim2.new(0, 16, 0, 16),

plugin/src/App/Components/ClassIcon.lua

@@ -0,0 +1,160 @@
+local StudioService = game:GetService("StudioService")
+local AssetService = game:GetService("AssetService")
+
+type CachedImageInfo = {
+	pixels: buffer,
+	size: Vector2,
+}
+
+local Rojo = script:FindFirstAncestor("Rojo")
+local Plugin = Rojo.Plugin
+local Packages = Rojo.Packages
+
+local Roact = require(Packages.Roact)
+
+local e = Roact.createElement
+
+local EditableImage = require(Plugin.App.Components.EditableImage)
+
+local imageCache: { [string]: CachedImageInfo } = {}
+
+local function cloneBuffer(b: buffer): buffer
+	local newBuffer = buffer.create(buffer.len(b))
+	buffer.copy(newBuffer, 0, b)
+	return newBuffer
+end
+
+local function getImageSizeAndPixels(image: string): (Vector2, buffer)
+	local cachedImage = imageCache[image]
+
+	if not cachedImage then
+		local editableImage = AssetService:CreateEditableImageAsync(Content.fromUri(image))
+		local size = editableImage.Size
+		local pixels = editableImage:ReadPixelsBuffer(Vector2.zero, size)
+		imageCache[image] = {
+			pixels = pixels,
+			size = size,
+		}
+
+		return size, cloneBuffer(pixels)
+	end
+
+	return cachedImage.size, cloneBuffer(cachedImage.pixels)
+end
+
+local function getRecoloredClassIcon(className, color)
+	local iconProps = StudioService:GetClassIcon(className)
+
+	if iconProps and color then
+		--stylua: ignore
+		local success, editableImageSize, editableImagePixels = pcall(function(_iconProps: { [any]: any }, _color: Color3): (Vector2, buffer)
+			local size, pixels = getImageSizeAndPixels(_iconProps.Image)
+			local pixelsLen = buffer.len(pixels)
+
+			local minVal, maxVal = math.huge, -math.huge
+
+			for i = 0, pixelsLen, 4 do
+				if buffer.readu8(pixels, i + 3) == 0 then
+					continue
+				end
+				local pixelVal = math.max(
+					buffer.readu8(pixels, i),
+					buffer.readu8(pixels, i + 1),
+					buffer.readu8(pixels, i + 2)
+				)
+
+				minVal = math.min(minVal, pixelVal)
+				maxVal = math.max(maxVal, pixelVal)
+			end
+
+			local hue, sat, val = _color:ToHSV()
+
+			for i = 0, pixelsLen, 4 do
+				if buffer.readu8(pixels, i + 3) == 0 then
+					continue
+				end
+				local gIndex = i + 1
+				local bIndex = i + 2
+
+				local pixelVal = math.max(
+					buffer.readu8(pixels, i),
+					buffer.readu8(pixels, gIndex),
+					buffer.readu8(pixels, bIndex)
+				)
+				local newVal = val
+				if minVal < maxVal then
+					-- Remap minVal - maxVal to val*0.9 - val
+					newVal = val * (0.9 + 0.1 * (pixelVal - minVal) / (maxVal - minVal))
+				end
+
+				local newPixelColor = Color3.fromHSV(hue, sat, newVal)
+				buffer.writeu8(pixels, i, newPixelColor.R)
+				buffer.writeu8(pixels, gIndex, newPixelColor.G)
+				buffer.writeu8(pixels, bIndex, newPixelColor.B)
+			end
+			return size, pixels
+		end, iconProps, color)
+		if success then
+			iconProps.EditableImagePixels = editableImagePixels
+			iconProps.EditableImageSize = editableImageSize
+		end
+	end
+
+	return iconProps
+end
+
+local ClassIcon = Roact.PureComponent:extend("ClassIcon")
+
+function ClassIcon:init()
+	self.state = {
+		iconProps = nil,
+	}
+end
+
+function ClassIcon:updateIcon()
+	local props = self.props
+	local iconProps = getRecoloredClassIcon(props.className, props.color)
+	self:setState({
+		iconProps = iconProps,
+	})
+end
+
+function ClassIcon:didMount()
+	self:updateIcon()
+end
+
+function ClassIcon:didUpdate(lastProps)
+	if lastProps.className ~= self.props.className or lastProps.color ~= self.props.color then
+		self:updateIcon()
+	end
+end
+
+function ClassIcon:render()
+	local iconProps = self.state.iconProps
+	if not iconProps then
+		return nil
+	end
+
+	return e(
+		"ImageLabel",
+		{
+			Size = self.props.size,
+			Position = self.props.position,
+			LayoutOrder = self.props.layoutOrder,
+			AnchorPoint = self.props.anchorPoint,
+			ImageTransparency = self.props.transparency,
+			Image = iconProps.Image,
+			ImageRectOffset = iconProps.ImageRectOffset,
+			ImageRectSize = iconProps.ImageRectSize,
+			BackgroundTransparency = 1,
+		},
+		if iconProps.EditableImagePixels
+			then e(EditableImage, {
+				size = iconProps.EditableImageSize,
+				pixels = iconProps.EditableImagePixels,
+			})
+			else nil
+	)
+end
+
+return ClassIcon

plugin/src/App/Components/Dropdown.lua

@@ -0,0 +1,182 @@
+local Rojo = script:FindFirstAncestor("Rojo")
+local Plugin = Rojo.Plugin
+local Packages = Rojo.Packages
+
+local Roact = require(Packages.Roact)
+local Flipper = require(Packages.Flipper)
+
+local Assets = require(Plugin.Assets)
+local Theme = require(Plugin.App.Theme)
+local bindingUtil = require(Plugin.App.bindingUtil)
+local getTextBoundsAsync = require(Plugin.App.getTextBoundsAsync)
+
+local SlicedImage = require(script.Parent.SlicedImage)
+local ScrollingFrame = require(script.Parent.ScrollingFrame)
+local Tooltip = require(script.Parent.Tooltip)
+
+local e = Roact.createElement
+
+local Dropdown = Roact.Component:extend("Dropdown")
+
+function Dropdown:init()
+	self.openMotor = Flipper.SingleMotor.new(0)
+	self.openBinding = bindingUtil.fromMotor(self.openMotor)
+
+	self.contentSize, self.setContentSize = Roact.createBinding(Vector2.new(0, 0))
+
+	self:setState({
+		open = false,
+	})
+end
+
+function Dropdown:didUpdate(prevProps)
+	if self.props.locked and not prevProps.locked then
+		self:setState({
+			open = false,
+		})
+	end
+
+	self.openMotor:setGoal(Flipper.Spring.new(self.state.open and 1 or 0, {
+		frequency = 6,
+		dampingRatio = 1.1,
+	}))
+end
+
+function Dropdown:render()
+	return Theme.with(function(theme)
+		local dropdownTheme = theme.Dropdown
+
+		local optionButtons = {}
+		local width = -1
+		for i, option in self.props.options do
+			local text = tostring(option or "")
+			local textBounds = getTextBoundsAsync(text, theme.Font.Main, theme.TextSize.Body, math.huge)
+			if textBounds.X > width then
+				width = textBounds.X
+			end
+
+			optionButtons[text] = e("TextButton", {
+				Text = text,
+				LayoutOrder = i,
+				Size = UDim2.new(1, 0, 0, 24),
+				BackgroundColor3 = dropdownTheme.BackgroundColor,
+				TextTransparency = self.props.transparency,
+				BackgroundTransparency = self.props.transparency,
+				BorderSizePixel = 0,
+				TextColor3 = dropdownTheme.TextColor,
+				TextXAlignment = Enum.TextXAlignment.Left,
+				TextSize = theme.TextSize.Body,
+				FontFace = theme.Font.Main,
+
+				[Roact.Event.Activated] = function()
+					if self.props.locked then
+						return
+					end
+					self:setState({
+						open = false,
+					})
+					self.props.onClick(option)
+				end,
+			}, {
+				Padding = e("UIPadding", {
+					PaddingLeft = UDim.new(0, 6),
+				}),
+			})
+		end
+
+		return e("ImageButton", {
+			Size = UDim2.new(0, width + 50, 0, 28),
+			Position = self.props.position,
+			AnchorPoint = self.props.anchorPoint,
+			LayoutOrder = self.props.layoutOrder,
+			ZIndex = self.props.zIndex,
+			BackgroundTransparency = 1,
+
+			[Roact.Event.Activated] = function()
+				if self.props.locked then
+					return
+				end
+				self:setState({
+					open = not self.state.open,
+				})
+			end,
+		}, {
+			Border = e(SlicedImage, {
+				slice = Assets.Slices.RoundedBorder,
+				color = dropdownTheme.BorderColor,
+				transparency = self.props.transparency,
+				size = UDim2.new(1, 0, 1, 0),
+			}, {
+				DropArrow = e("ImageLabel", {
+					Image = if self.props.locked then Assets.Images.Dropdown.Locked else Assets.Images.Dropdown.Arrow,
+					ImageColor3 = dropdownTheme.IconColor,
+					ImageTransparency = self.props.transparency,
+
+					Size = UDim2.new(0, 18, 0, 18),
+					Position = UDim2.new(1, -6, 0.5, 0),
+					AnchorPoint = Vector2.new(1, 0.5),
+					Rotation = self.openBinding:map(function(a)
+						return a * 180
+					end),
+
+					BackgroundTransparency = 1,
+				}, {
+					StateTip = if self.props.locked
+						then e(Tooltip.Trigger, {
+							text = self.props.lockedTooltip or "(Cannot be changed right now)",
+						})
+						else nil,
+				}),
+				Active = e("TextLabel", {
+					Size = UDim2.new(1, -30, 1, 0),
+					Position = UDim2.new(0, 6, 0, 0),
+					BackgroundTransparency = 1,
+					Text = self.props.active,
+					FontFace = theme.Font.Main,
+					TextSize = theme.TextSize.Body,
+					TextColor3 = dropdownTheme.TextColor,
+					TextXAlignment = Enum.TextXAlignment.Left,
+					TextTransparency = self.props.transparency,
+				}),
+			}),
+			Options = if self.state.open
+				then e(SlicedImage, {
+					slice = Assets.Slices.RoundedBackground,
+					color = dropdownTheme.BackgroundColor,
+					position = UDim2.new(1, 0, 1, 3),
+					size = self.openBinding:map(function(a)
+						return UDim2.new(1, 0, a * math.min(3, #self.props.options), 0)
+					end),
+					anchorPoint = Vector2.new(1, 0),
+				}, {
+					Border = e(SlicedImage, {
+						slice = Assets.Slices.RoundedBorder,
+						color = dropdownTheme.BorderColor,
+						transparency = self.props.transparency,
+						size = UDim2.new(1, 0, 1, 0),
+					}),
+					ScrollingFrame = e(ScrollingFrame, {
+						size = UDim2.new(1, -4, 1, -4),
+						position = UDim2.new(0, 2, 0, 2),
+						transparency = self.props.transparency,
+						contentSize = self.contentSize,
+					}, {
+						Layout = e("UIListLayout", {
+							VerticalAlignment = Enum.VerticalAlignment.Top,
+							FillDirection = Enum.FillDirection.Vertical,
+							SortOrder = Enum.SortOrder.LayoutOrder,
+							Padding = UDim.new(0, 0),
+
+							[Roact.Change.AbsoluteContentSize] = function(object)
+								self.setContentSize(object.AbsoluteContentSize)
+							end,
+						}),
+						Options = Roact.createFragment(optionButtons),
+					}),
+				})
+				else nil,
+		})
+	end)
+end
+
+return Dropdown

plugin/src/App/Components/EditableImage.lua

@@ -0,0 +1,42 @@
+local Rojo = script:FindFirstAncestor("Rojo")
+local Packages = Rojo.Packages
+
+local Roact = require(Packages.Roact)
+
+local e = Roact.createElement
+
+local EditableImage = Roact.PureComponent:extend("EditableImage")
+
+function EditableImage:init()
+	self.ref = Roact.createRef()
+end
+
+function EditableImage:writePixels()
+	local image = self.ref.current :: EditableImage
+
+	if not image then
+		return
+	end
+	if not self.props.pixels then
+		return
+	end
+
+	image:WritePixelsBuffer(Vector2.zero, self.props.size, self.props.pixels)
+end
+
+function EditableImage:render()
+	return e("EditableImage", {
+		Size = self.props.size,
+		[Roact.Ref] = self.ref,
+	})
+end
+
+function EditableImage:didMount()
+	self:writePixels()
+end
+
+function EditableImage:didUpdate()
+	self:writePixels()
+end
+
+return EditableImage

plugin/src/App/Components/Header.lua

@@ -9,8 +9,70 @@ local Assets = require(Plugin.Assets)
 local Config = require(Plugin.Config)
 local Version = require(Plugin.Version)
 
+local Tooltip = require(Plugin.App.Components.Tooltip)
+local SlicedImage = require(script.Parent.SlicedImage)
+
 local e = Roact.createElement
 
+local function VersionIndicator(props)
+	local updateMessage = Version.getUpdateMessage()
+
+	return Theme.with(function(theme)
+		return e("Frame", {
+			LayoutOrder = props.layoutOrder,
+			Size = UDim2.new(0, 0, 0, 25),
+			BackgroundTransparency = 1,
+			AutomaticSize = Enum.AutomaticSize.X,
+		}, {
+			Border = if updateMessage
+				then e(SlicedImage, {
+					slice = Assets.Slices.RoundedBorder,
+					color = theme.Button.Bordered.Enabled.BorderColor,
+					transparency = props.transparency,
+					size = UDim2.fromScale(1, 1),
+					zIndex = 0,
+				}, {
+					Indicator = e("ImageLabel", {
+						Size = UDim2.new(0, 10, 0, 10),
+						ScaleType = Enum.ScaleType.Fit,
+						Image = Assets.Images.Circles[16],
+						ImageColor3 = theme.Header.LogoColor,
+						ImageTransparency = props.transparency,
+						BackgroundTransparency = 1,
+						Position = UDim2.new(1, 0, 0, 0),
+						AnchorPoint = Vector2.new(0.5, 0.5),
+					}),
+				})
+				else nil,
+
+			Tip = if updateMessage
+				then e(Tooltip.Trigger, {
+					text = updateMessage,
+					delay = 0.1,
+				})
+				else nil,
+
+			VersionText = e("TextLabel", {
+				Text = Version.display(Config.version),
+				FontFace = theme.Font.Thin,
+				TextSize = theme.TextSize.Body,
+				TextColor3 = theme.Header.VersionColor,
+				TextXAlignment = Enum.TextXAlignment.Left,
+				TextTransparency = props.transparency,
+				BackgroundTransparency = 1,
+
+				Size = UDim2.new(0, 0, 1, 0),
+				AutomaticSize = Enum.AutomaticSize.X,
+			}, {
+				Padding = e("UIPadding", {
+					PaddingLeft = UDim.new(0, 6),
+					PaddingRight = UDim.new(0, 6),
+				}),
+			}),
+		})
+	end)
+end
+
 local function Header(props)
 	return Theme.with(function(theme)
 		return e("Frame", {
@@ -29,18 +91,9 @@ local function Header(props)
 				BackgroundTransparency = 1,
 			}),
 
-			Version = e("TextLabel", {
+			VersionIndicator = e(VersionIndicator, {
-				Text = Version.display(Config.version),
+				transparency = props.transparency,
-				Font = Enum.Font.Gotham,
+				layoutOrder = 2,
-				TextSize = 14,
-				TextColor3 = theme.Header.VersionColor,
-				TextXAlignment = Enum.TextXAlignment.Left,
-				TextTransparency = props.transparency,
-
-				Size = UDim2.new(1, 0, 0, 14),
-
-				LayoutOrder = 2,
-				BackgroundTransparency = 1,
 			}),
 
 			Layout = e("UIListLayout", {

plugin/src/App/Components/IconButton.lua

@@ -30,6 +30,7 @@ function IconButton:render()
 		Position = self.props.position,
 		AnchorPoint = self.props.anchorPoint,
 
+		Visible = self.props.visible,
 		LayoutOrder = self.props.layoutOrder,
 		ZIndex = self.props.zIndex,
 		BackgroundTransparency = 1,
@@ -37,15 +38,11 @@ function IconButton:render()
 		[Roact.Event.Activated] = self.props.onClick,
 
 		[Roact.Event.MouseEnter] = function()
-			self.motor:setGoal(
+			self.motor:setGoal(Flipper.Spring.new(1, HOVER_SPRING_PROPS))
-				Flipper.Spring.new(1, HOVER_SPRING_PROPS)
-			)
 		end,
 
 		[Roact.Event.MouseLeave] = function()
-			self.motor:setGoal(
+			self.motor:setGoal(Flipper.Spring.new(0, HOVER_SPRING_PROPS))
-				Flipper.Spring.new(0, HOVER_SPRING_PROPS)
-			)
 		end,
 	}, {
 		Icon = e("ImageLabel", {
@@ -74,6 +71,8 @@ function IconButton:render()
 
 			BackgroundTransparency = 1,
 		}),
+
+		Children = Roact.createFragment(self.props[Roact.Children]),
 	})
 end
 

plugin/src/App/Components/Notifications/FullscreenNotification.lua

@@ -0,0 +1,151 @@
+local StudioService = game:GetService("StudioService")
+
+local Rojo = script:FindFirstAncestor("Rojo")
+local Plugin = Rojo.Plugin
+local Packages = Rojo.Packages
+
+local Roact = require(Packages.Roact)
+local Log = require(Packages.Log)
+
+local Theme = require(Plugin.App.Theme)
+local Assets = require(Plugin.Assets)
+
+local TextButton = require(Plugin.App.Components.TextButton)
+
+local e = Roact.createElement
+
+local FullscreenNotification = Roact.Component:extend("FullscreeFullscreenNotificationnNotification")
+
+function FullscreenNotification:init()
+	self.transparency, self.setTransparency = Roact.createBinding(0)
+	self.lifetime = self.props.timeout
+end
+
+function FullscreenNotification:dismiss()
+	if self.props.onClose then
+		self.props.onClose()
+	end
+end
+
+function FullscreenNotification:didMount()
+	self.props.soundPlayer:play(Assets.Sounds.Notification)
+
+	self.timeout = task.spawn(function()
+		local clock = os.clock()
+		local seen = false
+		while task.wait(1 / 10) do
+			local now = os.clock()
+			local dt = now - clock
+			clock = now
+
+			if not seen then
+				seen = StudioService.ActiveScript == nil
+			end
+
+			if not seen then
+				-- Don't run down timer before being viewed
+				continue
+			end
+
+			self.lifetime -= dt
+			if self.lifetime <= 0 then
+				self:dismiss()
+				break
+			end
+		end
+
+		self.timeout = nil
+	end)
+end
+
+function FullscreenNotification:willUnmount()
+	if self.timeout and coroutine.status(self.timeout) ~= "dead" then
+		task.cancel(self.timeout)
+	end
+end
+
+function FullscreenNotification:render()
+	return Theme.with(function(theme)
+		local actionButtons = {}
+		if self.props.actions then
+			for key, action in self.props.actions do
+				actionButtons[key] = e(TextButton, {
+					text = action.text,
+					style = action.style,
+					onClick = function()
+						self:dismiss()
+						if action.onClick then
+							local success, err = pcall(action.onClick, self)
+							if not success then
+								Log.warn("Error in notification action: " .. tostring(err))
+							end
+						end
+					end,
+					layoutOrder = -action.layoutOrder,
+					transparency = self.transparency,
+				})
+			end
+		end
+
+		return e("Frame", {
+			BackgroundColor3 = theme.BackgroundColor,
+			Size = UDim2.fromScale(1, 1),
+			ZIndex = self.props.layoutOrder,
+		}, {
+			Padding = e("UIPadding", {
+				PaddingLeft = UDim.new(0, 17),
+				PaddingRight = UDim.new(0, 15),
+				PaddingTop = UDim.new(0, 10),
+				PaddingBottom = UDim.new(0, 10),
+			}),
+			Layout = e("UIListLayout", {
+				SortOrder = Enum.SortOrder.LayoutOrder,
+				FillDirection = Enum.FillDirection.Vertical,
+				HorizontalAlignment = Enum.HorizontalAlignment.Center,
+				VerticalAlignment = Enum.VerticalAlignment.Center,
+				Padding = UDim.new(0, 10),
+			}),
+			Logo = e("ImageLabel", {
+				ImageTransparency = self.transparency,
+				Image = Assets.Images.Logo,
+				ImageColor3 = theme.Header.LogoColor,
+				BackgroundTransparency = 1,
+				Size = UDim2.fromOffset(60, 27),
+				LayoutOrder = 1,
+			}),
+			Info = e("TextLabel", {
+				Text = self.props.text,
+				FontFace = theme.Font.Main,
+				TextSize = theme.TextSize.Body,
+				TextColor3 = theme.Notification.InfoColor,
+				TextTransparency = self.transparency,
+				TextXAlignment = Enum.TextXAlignment.Center,
+				TextYAlignment = Enum.TextYAlignment.Center,
+				TextWrapped = true,
+				BackgroundTransparency = 1,
+
+				AutomaticSize = Enum.AutomaticSize.Y,
+				Size = UDim2.fromScale(0.4, 0),
+				LayoutOrder = 2,
+			}),
+			Actions = if self.props.actions
+				then e("Frame", {
+					Size = UDim2.new(1, -40, 0, 37),
+					BackgroundTransparency = 1,
+					LayoutOrder = 3,
+				}, {
+					Layout = e("UIListLayout", {
+						FillDirection = Enum.FillDirection.Horizontal,
+						HorizontalAlignment = Enum.HorizontalAlignment.Center,
+						VerticalAlignment = Enum.VerticalAlignment.Center,
+						SortOrder = Enum.SortOrder.LayoutOrder,
+						Padding = UDim.new(0, 5),
+					}),
+					Buttons = Roact.createFragment(actionButtons),
+				})
+				else nil,
+		})
+	end)
+end
+
+return FullscreenNotification

plugin/src/App/Components/Notifications/Notification.lua

@@ -0,0 +1,204 @@
+local StudioService = game:GetService("StudioService")
+
+local Rojo = script:FindFirstAncestor("Rojo")
+local Plugin = Rojo.Plugin
+local Packages = Rojo.Packages
+
+local Roact = require(Packages.Roact)
+local Flipper = require(Packages.Flipper)
+local Log = require(Packages.Log)
+
+local Theme = require(Plugin.App.Theme)
+local Assets = require(Plugin.Assets)
+local bindingUtil = require(Plugin.App.bindingUtil)
+local getTextBoundsAsync = require(Plugin.App.getTextBoundsAsync)
+
+local BorderedContainer = require(Plugin.App.Components.BorderedContainer)
+local TextButton = require(Plugin.App.Components.TextButton)
+
+local e = Roact.createElement
+
+local Notification = Roact.Component:extend("Notification")
+
+function Notification:init()
+	self.motor = Flipper.SingleMotor.new(0)
+	self.binding = bindingUtil.fromMotor(self.motor)
+
+	self.lifetime = self.props.timeout
+
+	self.motor:onStep(function(value)
+		if value <= 0 and self.props.onClose then
+			self.props.onClose()
+		end
+	end)
+end
+
+function Notification:dismiss()
+	self.motor:setGoal(Flipper.Spring.new(0, {
+		frequency = 5,
+		dampingRatio = 1,
+	}))
+end
+
+function Notification:didMount()
+	self.motor:setGoal(Flipper.Spring.new(1, {
+		frequency = 3,
+		dampingRatio = 1,
+	}))
+
+	self.props.soundPlayer:play(Assets.Sounds.Notification)
+
+	self.timeout = task.spawn(function()
+		local clock = os.clock()
+		local seen = false
+		while task.wait(1 / 10) do
+			local now = os.clock()
+			local dt = now - clock
+			clock = now
+
+			if not seen then
+				seen = StudioService.ActiveScript == nil
+			end
+
+			if not seen then
+				-- Don't run down timer before being viewed
+				continue
+			end
+
+			self.lifetime -= dt
+			if self.lifetime <= 0 then
+				self:dismiss()
+				break
+			end
+		end
+	end)
+end
+
+function Notification:willUnmount()
+	if self.timeout and coroutine.status(self.timeout) ~= "dead" then
+		task.cancel(self.timeout)
+	end
+end
+
+function Notification:render()
+	local transparency = self.binding:map(function(value)
+		return 1 - value
+	end)
+
+	return Theme.with(function(theme)
+		local actionButtons = {}
+		local buttonsX = 0
+		if self.props.actions then
+			local count = 0
+			for key, action in self.props.actions do
+				actionButtons[key] = e(TextButton, {
+					text = action.text,
+					style = action.style,
+					onClick = function()
+						self:dismiss()
+						if action.onClick then
+							local success, err = pcall(action.onClick, self)
+							if not success then
+								Log.warn("Error in notification action: " .. tostring(err))
+							end
+						end
+					end,
+					layoutOrder = -action.layoutOrder,
+					transparency = transparency,
+				})
+
+				buttonsX += getTextBoundsAsync(action.text, theme.Font.Main, theme.TextSize.Large, math.huge).X + (theme.TextSize.Body * 2)
+
+				count += 1
+			end
+
+			buttonsX += (count - 1) * 5
+		end
+
+		local paddingY, logoSize = 20, 32
+		local actionsY = if self.props.actions then 37 else 0
+		local textXSpace = math.max(250, buttonsX) + 35
+		local textBounds = getTextBoundsAsync(self.props.text, theme.Font.Main, theme.TextSize.Body, textXSpace)
+		local contentX = math.max(textBounds.X, buttonsX)
+
+		local size = self.binding:map(function(value)
+			return UDim2.fromOffset(
+				(35 + 40 + contentX) * value,
+				5 + actionsY + paddingY + math.max(logoSize, textBounds.Y)
+			)
+		end)
+
+		return e("TextButton", {
+			BackgroundTransparency = 1,
+			Size = size,
+			LayoutOrder = self.props.layoutOrder,
+			Text = "",
+			ClipsDescendants = true,
+
+			[Roact.Event.Activated] = function()
+				self:dismiss()
+			end,
+		}, {
+			e(BorderedContainer, {
+				transparency = transparency,
+				size = UDim2.fromScale(1, 1),
+			}, {
+				Contents = e("Frame", {
+					Size = UDim2.fromScale(1, 1),
+					BackgroundTransparency = 1,
+				}, {
+					Logo = e("ImageLabel", {
+						ImageTransparency = transparency,
+						Image = Assets.Images.PluginButton,
+						BackgroundTransparency = 1,
+						Size = UDim2.fromOffset(logoSize, logoSize),
+						Position = UDim2.new(0, 0, 0, 0),
+						AnchorPoint = Vector2.new(0, 0),
+					}),
+					Info = e("TextLabel", {
+						Text = self.props.text,
+						FontFace = theme.Font.Main,
+						TextSize = theme.TextSize.Body,
+						TextColor3 = theme.Notification.InfoColor,
+						TextTransparency = transparency,
+						TextXAlignment = Enum.TextXAlignment.Left,
+						TextYAlignment = Enum.TextYAlignment.Center,
+						TextWrapped = true,
+
+						Size = UDim2.new(0, textBounds.X, 1, -actionsY),
+						Position = UDim2.fromOffset(35, 0),
+
+						LayoutOrder = 1,
+						BackgroundTransparency = 1,
+					}),
+					Actions = if self.props.actions
+						then e("Frame", {
+							Size = UDim2.new(1, -40, 0, actionsY),
+							Position = UDim2.fromScale(1, 1),
+							AnchorPoint = Vector2.new(1, 1),
+							BackgroundTransparency = 1,
+						}, {
+							Layout = e("UIListLayout", {
+								FillDirection = Enum.FillDirection.Horizontal,
+								HorizontalAlignment = Enum.HorizontalAlignment.Right,
+								VerticalAlignment = Enum.VerticalAlignment.Center,
+								SortOrder = Enum.SortOrder.LayoutOrder,
+								Padding = UDim.new(0, 5),
+							}),
+							Buttons = Roact.createFragment(actionButtons),
+						})
+						else nil,
+				}),
+
+				Padding = e("UIPadding", {
+					PaddingLeft = UDim.new(0, 17),
+					PaddingRight = UDim.new(0, 15),
+					PaddingTop = UDim.new(0, paddingY / 2),
+					PaddingBottom = UDim.new(0, paddingY / 2),
+				}),
+			}),
+		})
+	end)
+end
+
+return Notification

plugin/src/App/Components/Notifications/init.lua

@@ -0,0 +1,66 @@
+local Rojo = script:FindFirstAncestor("Rojo")
+
+local Packages = Rojo.Packages
+local Roact = require(Packages.Roact)
+
+local e = Roact.createElement
+
+local Notification = require(script.Notification)
+local FullscreenNotification = require(script.FullscreenNotification)
+
+local Notifications = Roact.Component:extend("Notifications")
+
+function Notifications:render()
+	local popupNotifs = {}
+	local fullscreenNotifs = {}
+
+	for id, notif in self.props.notifications do
+		local targetTable = if notif.isFullscreen then fullscreenNotifs else popupNotifs
+		local targetComponent = if notif.isFullscreen then FullscreenNotification else Notification
+		targetTable["NotifID_" .. id] = e(targetComponent, {
+			soundPlayer = self.props.soundPlayer,
+			text = notif.text,
+			timeout = notif.timeout,
+			actions = notif.actions,
+			layoutOrder = id,
+			onClose = function()
+				if notif.onClose then
+					notif.onClose()
+				end
+				self.props.onClose(id)
+			end,
+		})
+	end
+
+	return e("Frame", {
+		Size = UDim2.fromScale(1, 1),
+		BackgroundTransparency = 1,
+	}, {
+		Fullscreen = e("Frame", {
+			Size = UDim2.fromScale(1, 1),
+			BackgroundTransparency = 1,
+		}, {
+			notifs = Roact.createFragment(fullscreenNotifs),
+		}),
+		Popups = e("Frame", {
+			Size = UDim2.fromScale(1, 1),
+			BackgroundTransparency = 1,
+		}, {
+			Layout = e("UIListLayout", {
+				SortOrder = Enum.SortOrder.LayoutOrder,
+				HorizontalAlignment = Enum.HorizontalAlignment.Right,
+				VerticalAlignment = Enum.VerticalAlignment.Bottom,
+				Padding = UDim.new(0, 5),
+			}),
+			Padding = e("UIPadding", {
+				PaddingTop = UDim.new(0, 5),
+				PaddingBottom = UDim.new(0, 5),
+				PaddingLeft = UDim.new(0, 5),
+				PaddingRight = UDim.new(0, 5),
+			}),
+			notifs = Roact.createFragment(popupNotifs),
+		}),
+	})
+end
+
+return Notifications

plugin/src/App/Components/PatchVisualizer/ChangeList.lua

@@ -0,0 +1,281 @@
+local Rojo = script:FindFirstAncestor("Rojo")
+local Plugin = Rojo.Plugin
+local Packages = Rojo.Packages
+
+local Roact = require(Packages.Roact)
+
+local Assets = require(Plugin.Assets)
+local Theme = require(Plugin.App.Theme)
+local ScrollingFrame = require(Plugin.App.Components.ScrollingFrame)
+local BorderedContainer = require(Plugin.App.Components.BorderedContainer)
+local DisplayValue = require(script.Parent.DisplayValue)
+
+local EMPTY_TABLE = {}
+
+local e = Roact.createElement
+
+local function ViewDiffButton(props)
+	return Theme.with(function(theme)
+		return e("TextButton", {
+			Text = "",
+			Size = UDim2.new(0.7, 0, 1, -4),
+			LayoutOrder = 2,
+			BackgroundTransparency = 1,
+			[Roact.Event.Activated] = props.onClick,
+		}, {
+			e(BorderedContainer, {
+				size = UDim2.new(1, 0, 1, 0),
+				transparency = props.transparency:map(function(t)
+					return 0.5 + (0.5 * t)
+				end),
+			}, {
+				Layout = e("UIListLayout", {
+					FillDirection = Enum.FillDirection.Horizontal,
+					SortOrder = Enum.SortOrder.LayoutOrder,
+					HorizontalAlignment = Enum.HorizontalAlignment.Center,
+					VerticalAlignment = Enum.VerticalAlignment.Center,
+					Padding = UDim.new(0, 5),
+				}),
+				Label = e("TextLabel", {
+					Text = "View Diff",
+					BackgroundTransparency = 1,
+					FontFace = theme.Font.Main,
+					TextSize = theme.TextSize.Body,
+					TextColor3 = theme.Settings.Setting.DescriptionColor,
+					TextXAlignment = Enum.TextXAlignment.Left,
+					TextTransparency = props.transparency,
+					TextTruncate = Enum.TextTruncate.AtEnd,
+					Size = UDim2.new(0, 65, 1, 0),
+					LayoutOrder = 1,
+				}),
+				Icon = e("ImageLabel", {
+					Image = Assets.Images.Icons.Expand,
+					ImageColor3 = theme.Settings.Setting.DescriptionColor,
+					ImageTransparency = props.transparency,
+
+					Size = UDim2.new(0, 16, 0, 16),
+					Position = UDim2.new(0.5, 0, 0.5, 0),
+					AnchorPoint = Vector2.new(0.5, 0.5),
+
+					BackgroundTransparency = 1,
+					LayoutOrder = 2,
+				}),
+			}),
+		})
+	end)
+end
+
+local function RowContent(props)
+	local values = props.values
+	local metadata = props.metadata
+
+	if props.showStringDiff and values[1] == "Source" then
+		-- Special case for .Source updates
+		return e(ViewDiffButton, {
+			transparency = props.transparency,
+			onClick = function()
+				if not props.showStringDiff then
+					return
+				end
+				props.showStringDiff(tostring(values[2]), tostring(values[3]))
+			end,
+		})
+	end
+
+	if props.showTableDiff and (type(values[2]) == "table" or type(values[3]) == "table") then
+		-- Special case for table properties (like Attributes/Tags)
+		return e(ViewDiffButton, {
+			transparency = props.transparency,
+			onClick = function()
+				if not props.showTableDiff then
+					return
+				end
+				props.showTableDiff(values[2], values[3])
+			end,
+		})
+	end
+
+	return Theme.with(function(theme)
+		return Roact.createFragment({
+			ColumnB = e(
+				"Frame",
+				{
+					BackgroundTransparency = 1,
+					Size = UDim2.new(0.35, 0, 1, 0),
+					LayoutOrder = 2,
+				},
+				e(DisplayValue, {
+					value = values[2],
+					transparency = props.transparency,
+					textColor = if metadata.isWarning
+						then theme.Diff.Warning
+						else theme.Settings.Setting.DescriptionColor,
+				})
+			),
+			ColumnC = e(
+				"Frame",
+				{
+					BackgroundTransparency = 1,
+					Size = UDim2.new(0.35, 0, 1, 0),
+					LayoutOrder = 3,
+				},
+				e(DisplayValue, {
+					value = values[3],
+					transparency = props.transparency,
+					textColor = if metadata.isWarning
+						then theme.Diff.Warning
+						else theme.Settings.Setting.DescriptionColor,
+				})
+			),
+		})
+	end)
+end
+
+local ChangeList = Roact.Component:extend("ChangeList")
+
+function ChangeList:init()
+	self.contentSize, self.setContentSize = Roact.createBinding(Vector2.new(0, 0))
+end
+
+function ChangeList:render()
+	return Theme.with(function(theme)
+		local props = self.props
+		local changes = props.changes
+
+		-- Color alternating rows for readability
+		local rowTransparency = props.transparency:map(function(t)
+			return 0.93 + (0.07 * t)
+		end)
+
+		local rows = {}
+		local pad = {
+			PaddingLeft = UDim.new(0, 5),
+			PaddingRight = UDim.new(0, 5),
+		}
+
+		local headerRow = changes[1]
+		local headers = e("Frame", {
+			Size = UDim2.new(1, 0, 0, 24),
+			BackgroundTransparency = rowTransparency,
+			BackgroundColor3 = theme.Diff.Row,
+			LayoutOrder = 0,
+		}, {
+			Padding = e("UIPadding", pad),
+			Layout = e("UIListLayout", {
+				FillDirection = Enum.FillDirection.Horizontal,
+				SortOrder = Enum.SortOrder.LayoutOrder,
+				HorizontalAlignment = Enum.HorizontalAlignment.Left,
+				VerticalAlignment = Enum.VerticalAlignment.Center,
+			}),
+			ColumnA = e("TextLabel", {
+				Text = tostring(headerRow[1]),
+				BackgroundTransparency = 1,
+				FontFace = theme.Font.Bold,
+				TextSize = theme.TextSize.Body,
+				TextColor3 = theme.TextColor,
+				TextXAlignment = Enum.TextXAlignment.Left,
+				TextTransparency = props.transparency,
+				TextTruncate = Enum.TextTruncate.AtEnd,
+				Size = UDim2.new(0.3, 0, 1, 0),
+				LayoutOrder = 1,
+			}),
+			ColumnB = e("TextLabel", {
+				Text = tostring(headerRow[2]),
+				BackgroundTransparency = 1,
+				FontFace = theme.Font.Bold,
+				TextSize = theme.TextSize.Body,
+				TextColor3 = theme.TextColor,
+				TextXAlignment = Enum.TextXAlignment.Left,
+				TextTransparency = props.transparency,
+				TextTruncate = Enum.TextTruncate.AtEnd,
+				Size = UDim2.new(0.35, 0, 1, 0),
+				LayoutOrder = 2,
+			}),
+			ColumnC = e("TextLabel", {
+				Text = tostring(headerRow[3]),
+				BackgroundTransparency = 1,
+				FontFace = theme.Font.Bold,
+				TextSize = theme.TextSize.Body,
+				TextColor3 = theme.TextColor,
+				TextXAlignment = Enum.TextXAlignment.Left,
+				TextTransparency = props.transparency,
+				TextTruncate = Enum.TextTruncate.AtEnd,
+				Size = UDim2.new(0.35, 0, 1, 0),
+				LayoutOrder = 3,
+			}),
+		})
+
+		for row, values in changes do
+			if row == 1 then
+				continue -- Skip headers, already handled above
+			end
+
+			local metadata = values[4] or EMPTY_TABLE
+			local isWarning = metadata.isWarning
+
+			rows[row] = e("Frame", {
+				Size = UDim2.new(1, 0, 0, 24),
+				BackgroundTransparency = row % 2 ~= 0 and rowTransparency or 1,
+				BackgroundColor3 = theme.Diff.Row,
+				BorderSizePixel = 0,
+				LayoutOrder = row,
+			}, {
+				Padding = e("UIPadding", pad),
+				Layout = e("UIListLayout", {
+					FillDirection = Enum.FillDirection.Horizontal,
+					SortOrder = Enum.SortOrder.LayoutOrder,
+					HorizontalAlignment = Enum.HorizontalAlignment.Left,
+					VerticalAlignment = Enum.VerticalAlignment.Center,
+				}),
+				ColumnA = e("TextLabel", {
+					Text = (if isWarning then "⚠ " else "") .. tostring(values[1]),
+					BackgroundTransparency = 1,
+					FontFace = theme.Font.Main,
+					TextSize = theme.TextSize.Body,
+					TextColor3 = if isWarning then theme.Diff.Warning else theme.TextColor,
+					TextXAlignment = Enum.TextXAlignment.Left,
+					TextTransparency = props.transparency,
+					TextTruncate = Enum.TextTruncate.AtEnd,
+					Size = UDim2.new(0.3, 0, 1, 0),
+					LayoutOrder = 1,
+				}),
+				Content = e(RowContent, {
+					values = values,
+					metadata = metadata,
+					transparency = props.transparency,
+					showStringDiff = props.showStringDiff,
+					showTableDiff = props.showTableDiff,
+				}),
+			})
+		end
+
+		table.insert(
+			rows,
+			e("UIListLayout", {
+				FillDirection = Enum.FillDirection.Vertical,
+				SortOrder = Enum.SortOrder.LayoutOrder,
+				HorizontalAlignment = Enum.HorizontalAlignment.Right,
+				VerticalAlignment = Enum.VerticalAlignment.Top,
+
+				[Roact.Change.AbsoluteContentSize] = function(object)
+					self.setContentSize(object.AbsoluteContentSize)
+				end,
+			})
+		)
+
+		return e("Frame", {
+			Size = UDim2.new(1, 0, 1, 0),
+			BackgroundTransparency = 1,
+		}, {
+			Headers = headers,
+			Values = e(ScrollingFrame, {
+				size = UDim2.new(1, 0, 1, -24),
+				position = UDim2.new(0, 0, 0, 24),
+				contentSize = self.contentSize,
+				transparency = props.transparency,
+			}, rows),
+		})
+	end)
+end
+
+return ChangeList

plugin/src/App/Components/PatchVisualizer/DisplayValue.lua

@@ -0,0 +1,126 @@
+local Rojo = script:FindFirstAncestor("Rojo")
+local Plugin = Rojo.Plugin
+local Packages = Rojo.Packages
+
+local Roact = require(Packages.Roact)
+
+local Theme = require(Plugin.App.Theme)
+
+local e = Roact.createElement
+
+local function DisplayValue(props)
+	return Theme.with(function(theme)
+		local t = typeof(props.value)
+		if t == "Color3" then
+			-- Colors get a blot that shows the color
+			return Roact.createFragment({
+				Blot = e("Frame", {
+					BackgroundTransparency = props.transparency,
+					BackgroundColor3 = props.value,
+					Size = UDim2.new(0, 20, 0, 20),
+					Position = UDim2.new(0, 0, 0.5, 0),
+					AnchorPoint = Vector2.new(0, 0.5),
+				}, {
+					Corner = e("UICorner", {
+						CornerRadius = UDim.new(0, 4),
+					}),
+					Stroke = e("UIStroke", {
+						Color = theme.BorderedContainer.BorderColor,
+						Transparency = props.transparency,
+					}),
+				}),
+				Label = e("TextLabel", {
+					Text = string.format("%d, %d, %d", props.value.R * 255, props.value.G * 255, props.value.B * 255),
+					BackgroundTransparency = 1,
+					FontFace = theme.Font.Main,
+					TextSize = theme.TextSize.Body,
+					TextColor3 = props.textColor,
+					TextXAlignment = Enum.TextXAlignment.Left,
+					TextTransparency = props.transparency,
+					TextTruncate = Enum.TextTruncate.AtEnd,
+					Size = UDim2.new(1, -25, 1, 0),
+					Position = UDim2.new(0, 25, 0, 0),
+				}),
+			})
+		elseif t == "table" then
+			-- Showing a memory address for tables is useless, so we want to show the best we can
+			local textRepresentation = nil
+
+			local meta = getmetatable(props.value)
+			if meta and meta.__tostring then
+				-- If the table has a tostring metamethod, use that
+				textRepresentation = tostring(props.value)
+			elseif next(props.value) == nil then
+				-- If it's empty, show empty braces
+				textRepresentation = "{}"
+			elseif next(props.value) == 1 then
+				-- We don't need to support mixed tables, so checking the first key is enough
+				-- to determine if it's a simple array
+				local out, i = table.create(#props.value), 0
+				for _, v in props.value do
+					i += 1
+
+					-- Wrap strings in quotes
+					if type(v) == "string" then
+						v = '"' .. v .. '"'
+					end
+
+					out[i] = tostring(v)
+				end
+				textRepresentation = "{ " .. table.concat(out, ", ") .. " }"
+			else
+				-- Otherwise, show the table contents as a dictionary
+				local out, i = {}, 0
+				for k, v in pairs(props.value) do
+					i += 1
+
+					-- Wrap strings in quotes
+					if type(k) == "string" then
+						k = '"' .. k .. '"'
+					end
+					if type(v) == "string" then
+						v = '"' .. v .. '"'
+					end
+
+					out[i] = string.format("[%s] = %s", tostring(k), tostring(v))
+				end
+				textRepresentation = "{ " .. table.concat(out, ", ") .. " }"
+			end
+
+			return e("TextLabel", {
+				Text = textRepresentation,
+				BackgroundTransparency = 1,
+				FontFace = theme.Font.Main,
+				TextSize = theme.TextSize.Body,
+				TextColor3 = props.textColor,
+				TextXAlignment = Enum.TextXAlignment.Left,
+				TextTransparency = props.transparency,
+				TextTruncate = Enum.TextTruncate.AtEnd,
+				Size = UDim2.new(1, 0, 1, 0),
+			})
+		end
+
+		-- TODO: Maybe add visualizations to other datatypes?
+		-- Or special text handling tostring for some?
+		-- Will add as needed, let's see what cases arise.
+
+		local textRepresentation = string.gsub(tostring(props.value), "%s", " ")
+		if t == "string" then
+			textRepresentation = '"' .. textRepresentation .. '"'
+		end
+
+		return e("TextLabel", {
+			Text = textRepresentation,
+			BackgroundTransparency = 1,
+			FontFace = theme.Font.Main,
+			TextSize = theme.TextSize.Body,
+			TextColor3 = props.textColor,
+			TextXAlignment = Enum.TextXAlignment.Left,
+			TextTransparency = props.transparency,
+			TextTruncate = Enum.TextTruncate.AtEnd,
+			Size = UDim2.new(1, 0, 1, 0),
+		})
+	end)
+end
+
+return DisplayValue

plugin/src/App/Components/PatchVisualizer/DomLabel.lua

@@ -0,0 +1,282 @@
+local SelectionService = game:GetService("Selection")
+
+local Rojo = script:FindFirstAncestor("Rojo")
+local Plugin = Rojo.Plugin
+local Packages = Rojo.Packages
+
+local Roact = require(Packages.Roact)
+local Flipper = require(Packages.Flipper)
+
+local Assets = require(Plugin.Assets)
+local Theme = require(Plugin.App.Theme)
+local bindingUtil = require(Plugin.App.bindingUtil)
+
+local e = Roact.createElement
+
+local ChangeList = require(script.Parent.ChangeList)
+local Tooltip = require(Plugin.App.Components.Tooltip)
+local ClassIcon = require(Plugin.App.Components.ClassIcon)
+
+local Expansion = Roact.Component:extend("Expansion")
+
+function Expansion:render()
+	local props = self.props
+
+	if not props.rendered then
+		return nil
+	end
+
+	return e("Frame", {
+		BackgroundTransparency = 1,
+		Size = UDim2.new(1, -props.indent, 1, -24),
+		Position = UDim2.new(0, props.indent, 0, 24),
+	}, {
+		ChangeList = e(ChangeList, {
+			changes = props.changeList,
+			transparency = props.transparency,
+			showStringDiff = props.showStringDiff,
+			showTableDiff = props.showTableDiff,
+		}),
+	})
+end
+
+local DomLabel = Roact.Component:extend("DomLabel")
+
+function DomLabel:init()
+	local initHeight = self.props.elementHeight:getValue()
+	self.expanded = initHeight > 24
+
+	self.motor = Flipper.SingleMotor.new(initHeight)
+	self.binding = bindingUtil.fromMotor(self.motor)
+
+	self:setState({
+		renderExpansion = self.expanded,
+	})
+	self.motor:onStep(function(value)
+		local renderExpansion = value > 24
+
+		self.props.setElementHeight(value)
+		if self.props.updateEvent then
+			self.props.updateEvent:Fire()
+		end
+
+		self:setState(function(state)
+			if state.renderExpansion == renderExpansion then
+				return nil
+			end
+
+			return {
+				renderExpansion = renderExpansion,
+			}
+		end)
+	end)
+end
+
+function DomLabel:didUpdate(prevProps)
+	if
+		prevProps.instance ~= self.props.instance
+		or prevProps.patchType ~= self.props.patchType
+		or prevProps.name ~= self.props.name
+		or prevProps.changeList ~= self.props.changeList
+	then
+		-- Close the expansion when the domlabel is changed to a different thing
+		self.expanded = false
+		self.motor:setGoal(Flipper.Spring.new(24, {
+			frequency = 5,
+			dampingRatio = 1,
+		}))
+	end
+end
+
+function DomLabel:render()
+	local props = self.props
+	local depth = props.depth or 1
+
+	return Theme.with(function(theme)
+		local color = if props.isWarning
+			then theme.Diff.Warning
+			elseif props.patchType then theme.Diff.Background[props.patchType]
+			else theme.TextColor
+
+		local indent = (depth - 1) * 12 + 15
+
+		-- Line guides help indent depth remain readable
+		local lineGuides = {}
+		for i = 2, depth do
+			if props.depthsComplete[i] then
+				continue
+			end
+			if props.isFinalChild and i == depth then
+				-- This line stops halfway down to merge with our connector for the right angle
+				lineGuides["Line_" .. i] = e("Frame", {
+					Size = UDim2.new(0, 2, 0, 15),
+					Position = UDim2.new(0, (12 * (i - 1)) + 6, 0, -1),
+					BorderSizePixel = 0,
+					BackgroundTransparency = props.transparency,
+					BackgroundColor3 = theme.BorderedContainer.BorderColor,
+				})
+			else
+				-- All other lines go all the way
+				-- with the exception of the final element, which stops halfway down
+				lineGuides["Line_" .. i] = e("Frame", {
+					Size = UDim2.new(0, 2, 1, if props.isFinalElement then -9 else 2),
+					Position = UDim2.new(0, (12 * (i - 1)) + 6, 0, -1),
+					BorderSizePixel = 0,
+					BackgroundTransparency = props.transparency,
+					BackgroundColor3 = theme.BorderedContainer.BorderColor,
+				})
+			end
+		end
+
+		if depth ~= 1 then
+			lineGuides["Connector"] = e("Frame", {
+				Size = UDim2.new(0, 8, 0, 2),
+				Position = UDim2.new(0, 2 + (12 * props.depth), 0, 12),
+				AnchorPoint = Vector2.xAxis,
+				BorderSizePixel = 0,
+				BackgroundTransparency = props.transparency,
+				BackgroundColor3 = theme.BorderedContainer.BorderColor,
+			})
+		end
+
+		return e("Frame", {
+			ClipsDescendants = true,
+			BackgroundTransparency = if props.elementIndex % 2 == 0 then 0.985 else 1,
+			BackgroundColor3 = theme.Diff.Row,
+			Size = self.binding:map(function(expand)
+				return UDim2.new(1, 0, 0, expand)
+			end),
+		}, {
+			Padding = e("UIPadding", {
+				PaddingLeft = UDim.new(0, 10),
+				PaddingRight = UDim.new(0, 10),
+			}),
+			Button = e("TextButton", {
+				BackgroundTransparency = 1,
+				Text = "",
+				Size = UDim2.new(1, 0, 1, 0),
+				[Roact.Event.Activated] = function(_rbx: Instance, _input: InputObject, clickCount: number)
+					if clickCount == 1 then
+						-- Double click opens the instance in explorer
+						self.lastDoubleClickTime = os.clock()
+						if props.instance then
+							SelectionService:Set({ props.instance })
+						end
+					elseif clickCount == 0 then
+						-- Single click expands the changes
+						task.wait(0.25)
+						if os.clock() - (self.lastDoubleClickTime or 0) <= 0.25 then
+							-- This is a double click, so don't expand
+							return
+						end
+
+						if props.changeList then
+							self.expanded = not self.expanded
+							local goalHeight = 24
+								+ (if self.expanded then math.clamp(#props.changeList * 24, 24, 24 * 6) else 0)
+							self.motor:setGoal(Flipper.Spring.new(goalHeight, {
+								frequency = 5,
+								dampingRatio = 1,
+							}))
+						end
+					end
+				end,
+			}, {
+				StateTip = if (props.instance or props.changeList)
+					then e(Tooltip.Trigger, {
+						text = (if props.changeList
+							then "Click to " .. (if self.expanded then "hide" else "view") .. " changes"
+							else "") .. (if props.instance
+							then (if props.changeList then " & d" else "D") .. "ouble click to open in Explorer"
+							else ""),
+					})
+					else nil,
+			}),
+			Expansion = if props.changeList
+				then e(Expansion, {
+					rendered = self.state.renderExpansion,
+					indent = indent,
+					transparency = props.transparency,
+					changeList = props.changeList,
+					showStringDiff = props.showStringDiff,
+					showTableDiff = props.showTableDiff,
+				})
+				else nil,
+			DiffIcon = if props.patchType
+				then e("ImageLabel", {
+					Image = Assets.Images.Diff[props.patchType],
+					ImageColor3 = color,
+					ImageTransparency = props.transparency,
+					BackgroundTransparency = 1,
+					Size = UDim2.new(0, 14, 0, 14),
+					Position = UDim2.new(0, 0, 0, 12),
+					AnchorPoint = Vector2.new(0, 0.5),
+				})
+				else nil,
+			ClassIcon = e(ClassIcon, {
+				className = props.className,
+				color = color,
+				transparency = props.transparency,
+				size = UDim2.new(0, 16, 0, 16),
+				position = UDim2.new(0, indent + 2, 0, 12),
+				anchorPoint = Vector2.new(0, 0.5),
+			}),
+			InstanceName = e("TextLabel", {
+				Text = (if props.isWarning then "⚠ " else "") .. props.name,
+				RichText = true,
+				BackgroundTransparency = 1,
+				FontFace = if props.patchType then theme.Font.Bold else theme.Font.Main,
+				TextSize = theme.TextSize.Body,
+				TextColor3 = color,
+				TextXAlignment = Enum.TextXAlignment.Left,
+				TextTransparency = props.transparency,
+				TextTruncate = Enum.TextTruncate.AtEnd,
+				Size = UDim2.new(1, -indent - 50, 0, 24),
+				Position = UDim2.new(0, indent + 22, 0, 0),
+			}),
+			ChangeInfo = e("Frame", {
+				BackgroundTransparency = 1,
+				Size = UDim2.new(1, -indent - 80, 0, 24),
+				Position = UDim2.new(1, -2, 0, 0),
+				AnchorPoint = Vector2.new(1, 0),
+			}, {
+				Layout = e("UIListLayout", {
+					FillDirection = Enum.FillDirection.Horizontal,
+					HorizontalAlignment = Enum.HorizontalAlignment.Right,
+					VerticalAlignment = Enum.VerticalAlignment.Center,
+					SortOrder = Enum.SortOrder.LayoutOrder,
+					Padding = UDim.new(0, 4),
+				}),
+				Edits = if props.changeInfo and props.changeInfo.edits
+					then e("TextLabel", {
+						Text = props.changeInfo.edits .. if props.changeInfo.failed then "," else "",
+						BackgroundTransparency = 1,
+						FontFace = theme.Font.Thin,
+						TextSize = theme.TextSize.Body,
+						TextColor3 = theme.SubTextColor,
+						TextTransparency = props.transparency,
+						Size = UDim2.new(0, 0, 0, theme.TextSize.Body),
+						AutomaticSize = Enum.AutomaticSize.X,
+						LayoutOrder = 2,
+					})
+					else nil,
+				Failed = if props.changeInfo and props.changeInfo.failed
+					then e("TextLabel", {
+						Text = props.changeInfo.failed,
+						BackgroundTransparency = 1,
+						FontFace = theme.Font.Thin,
+						TextSize = theme.TextSize.Body,
+						TextColor3 = theme.Diff.Warning,
+						TextTransparency = props.transparency,
+						Size = UDim2.new(0, 0, 0, theme.TextSize.Body),
+						AutomaticSize = Enum.AutomaticSize.X,
+						LayoutOrder = 6,
+					})
+					else nil,
+			}),
+			LineGuides = e("Folder", nil, lineGuides),
+		})
+	end)
+end
+
+return DomLabel

plugin/src/App/Components/PatchVisualizer/init.lua

@@ -0,0 +1,152 @@
+local Rojo = script:FindFirstAncestor("Rojo")
+local Plugin = Rojo.Plugin
+local Packages = Rojo.Packages
+
+local Roact = require(Packages.Roact)
+
+local PatchTree = require(Plugin.PatchTree)
+local PatchSet = require(Plugin.PatchSet)
+
+local Theme = require(Plugin.App.Theme)
+local VirtualScroller = require(Plugin.App.Components.VirtualScroller)
+local BorderedContainer = require(Plugin.App.Components.BorderedContainer)
+
+local e = Roact.createElement
+
+local DomLabel = require(script.DomLabel)
+
+local PatchVisualizer = Roact.Component:extend("PatchVisualizer")
+
+function PatchVisualizer:init()
+	self.contentSize, self.setContentSize = Roact.createBinding(Vector2.new(0, 0))
+
+	self.updateEvent = Instance.new("BindableEvent")
+end
+
+function PatchVisualizer:willUnmount()
+	self.updateEvent:Destroy()
+end
+
+function PatchVisualizer:shouldUpdate(nextProps)
+	if self.props.patchTree ~= nextProps.patchTree then
+		return true
+	end
+
+	local currentPatch, nextPatch = self.props.patch, nextProps.patch
+	if currentPatch ~= nil or nextPatch ~= nil then
+		return not PatchSet.isEqual(currentPatch, nextPatch)
+	end
+
+	return false
+end
+
+function PatchVisualizer:render()
+	local patchTree = self.props.patchTree
+	if patchTree == nil and self.props.patch ~= nil then
+		patchTree = PatchTree.build(
+			self.props.patch,
+			self.props.instanceMap,
+			self.props.changeListHeaders or { "Property", "Current", "Incoming" }
+		)
+		if self.props.unappliedPatch then
+			patchTree =
+				PatchTree.updateMetadata(patchTree, self.props.patch, self.props.instanceMap, self.props.unappliedPatch)
+		end
+	end
+
+	-- Recusively draw tree
+	local scrollElements, elementHeights, elementIndex = {}, {}, 0
+
+	if patchTree then
+		local elementTotal = patchTree:getCount()
+		local depthsComplete = {}
+		local function drawNode(node, depth)
+			elementIndex += 1
+
+			local parentNode = patchTree:getNode(node.parentId)
+			local isFinalChild = true
+			if parentNode then
+				for _id, sibling in parentNode.children do
+					if type(sibling) == "table" and sibling.name and sibling.name > node.name then
+						isFinalChild = false
+						break
+					end
+				end
+			end
+
+			local elementHeight, setElementHeight = Roact.createBinding(24)
+			elementHeights[elementIndex] = elementHeight
+			scrollElements[elementIndex] = e(DomLabel, {
+				transparency = self.props.transparency,
+				showStringDiff = self.props.showStringDiff,
+				showTableDiff = self.props.showTableDiff,
+				updateEvent = self.updateEvent,
+				elementHeight = elementHeight,
+				setElementHeight = setElementHeight,
+				elementIndex = elementIndex,
+				isFinalElement = elementIndex == elementTotal,
+				depth = depth,
+				depthsComplete = table.clone(depthsComplete),
+				hasChildren = (node.children ~= nil and next(node.children) ~= nil),
+				isFinalChild = isFinalChild,
+				patchType = node.patchType,
+				className = node.className,
+				isWarning = node.isWarning,
+				instance = node.instance,
+				name = node.name,
+				changeInfo = node.changeInfo,
+				changeList = node.changeList,
+			})
+
+			if isFinalChild then
+				depthsComplete[depth] = true
+			end
+		end
+
+		patchTree:forEach(function(node, depth)
+			depthsComplete[depth] = false
+			for i = depth + 1, #depthsComplete do
+				depthsComplete[i] = nil
+			end
+
+			drawNode(node, depth)
+		end)
+	end
+
+	return Theme.with(function(theme)
+		return e(BorderedContainer, {
+			transparency = self.props.transparency,
+			size = self.props.size,
+			position = self.props.position,
+			anchorPoint = self.props.anchorPoint,
+			layoutOrder = self.props.layoutOrder,
+		}, {
+			CleanMerge = e("TextLabel", {
+				Visible = #scrollElements == 0,
+				Text = "No changes to sync, project is up to date.",
+				FontFace = theme.Font.Main,
+				TextSize = theme.TextSize.Medium,
+				TextColor3 = theme.TextColor,
+				TextWrapped = true,
+				Size = UDim2.new(1, 0, 1, 0),
+				BackgroundTransparency = 1,
+			}),
+
+			VirtualScroller = e(VirtualScroller, {
+				size = UDim2.new(1, 0, 1, -2),
+				position = UDim2.new(0, 0, 0, 2),
+				transparency = self.props.transparency,
+				count = #scrollElements,
+				updateEvent = self.updateEvent.Event,
+				render = function(i)
+					return scrollElements[i]
+				end,
+				getHeightBinding = function(i)
+					return elementHeights[i]
+				end,
+			}),
+		})
+	end)
+end
+
+return PatchVisualizer

plugin/src/App/Components/ScrollingFrame.lua

@@ -10,6 +10,12 @@ local bindingUtil = require(Plugin.App.bindingUtil)
 
 local e = Roact.createElement
 
+local scrollDirToAutoSize = {
+	[Enum.ScrollingDirection.X] = Enum.AutomaticSize.X,
+	[Enum.ScrollingDirection.Y] = Enum.AutomaticSize.Y,
+	[Enum.ScrollingDirection.XY] = Enum.AutomaticSize.XY,
+}
+
 local function ScrollingFrame(props)
 	return Theme.with(function(theme)
 		return e("ScrollingFrame", {
@@ -23,19 +29,31 @@ local function ScrollingFrame(props)
 			BottomImage = Assets.Images.ScrollBar.Bottom,
 
 			ElasticBehavior = Enum.ElasticBehavior.Always,
-			ScrollingDirection = Enum.ScrollingDirection.Y,
+			ScrollingDirection = props.scrollingDirection or Enum.ScrollingDirection.Y,
 
 			Size = props.size,
 			Position = props.position,
 			AnchorPoint = props.anchorPoint,
-			CanvasSize = props.contentSize:map(function(value)
+			CanvasSize = if props.contentSize
-				return UDim2.new(0, 0, 0, value.Y)
+				then props.contentSize:map(function(value)
-			end),
+					return UDim2.new(
+						0,
+						if (props.scrollingDirection and props.scrollingDirection ~= Enum.ScrollingDirection.Y)
+							then value.X
+							else 0,
+						0,
+						value.Y
+					)
+				end)
+				else UDim2.new(),
+			AutomaticCanvasSize = if props.contentSize == nil
+				then scrollDirToAutoSize[props.scrollingDirection or Enum.ScrollingDirection.XY]
+				else nil,
 
 			BorderSizePixel = 0,
 			BackgroundTransparency = 1,
 
-			[Roact.Change.AbsoluteSize] = props[Roact.Change.AbsoluteSize]
+			[Roact.Change.AbsoluteSize] = props[Roact.Change.AbsoluteSize],
 		}, props[Roact.Children])
 	end)
 end

plugin/src/App/Components/SlicedImage.lua

@@ -20,6 +20,7 @@ local function SlicedImage(props)
 		Size = props.size,
 		Position = props.position,
 		AnchorPoint = props.anchorPoint,
+		AutomaticSize = props.automaticSize,
 
 		ZIndex = props.zIndex,
 		LayoutOrder = props.layoutOrder,

plugin/src/App/Components/StringDiffVisualizer/StringDiff.lua

@@ -0,0 +1,734 @@
+--!strict
+--[[
+    Based on DiffMatchPatch by Neil Fraser.
+    https://github.com/google/diff-match-patch
+]]
+
+export type DiffAction = number
+export type Diff = { actionType: DiffAction, value: string }
+export type Diffs = { Diff }
+
+local StringDiff = {
+	ActionTypes = table.freeze({
+		Equal = 0,
+		Delete = 1,
+		Insert = 2,
+	}),
+}
+
+function StringDiff.findDiffs(text1: string, text2: string): Diffs
+	-- Validate inputs
+	if type(text1) ~= "string" or type(text2) ~= "string" then
+		error(
+			string.format(
+				"Invalid inputs to StringDiff.findDiffs, expected strings and got (%s, %s)",
+				type(text1),
+				type(text2)
+			),
+			2
+		)
+	end
+
+	-- Shortcut if the texts are identical
+	if text1 == text2 then
+		return { { actionType = StringDiff.ActionTypes.Equal, value = text1 } }
+	end
+
+	-- Trim off any shared prefix and suffix
+	-- These are easy to detect and can be dealt with quickly without needing a complex diff
+	-- and later we simply add them as Equal to the start and end of the diff
+	local sharedPrefix, sharedSuffix
+	local prefixLength = StringDiff._sharedPrefix(text1, text2)
+	if prefixLength > 0 then
+		-- Store the prefix
+		sharedPrefix = string.sub(text1, 1, prefixLength)
+		-- Now trim it off
+		text1 = string.sub(text1, prefixLength + 1)
+		text2 = string.sub(text2, prefixLength + 1)
+	end
+
+	local suffixLength = StringDiff._sharedSuffix(text1, text2)
+	if suffixLength > 0 then
+		-- Store the suffix
+		sharedSuffix = string.sub(text1, -suffixLength)
+		-- Now trim it off
+		text1 = string.sub(text1, 1, -suffixLength - 1)
+		text2 = string.sub(text2, 1, -suffixLength - 1)
+	end
+
+	-- Compute the diff on the middle block where the changes lie
+	local diffs = StringDiff._computeDiff(text1, text2)
+
+	-- Restore the prefix and suffix
+	if sharedPrefix then
+		table.insert(diffs, 1, { actionType = StringDiff.ActionTypes.Equal, value = sharedPrefix })
+	end
+	if sharedSuffix then
+		table.insert(diffs, { actionType = StringDiff.ActionTypes.Equal, value = sharedSuffix })
+	end
+
+	-- Cleanup the diff
+	diffs = StringDiff._cleanupSemantic(diffs)
+	diffs = StringDiff._reorderAndMerge(diffs)
+
+	-- Remove any empty diffs
+	local cursor = 1
+	while cursor and diffs[cursor] do
+		if diffs[cursor].value == "" then
+			table.remove(diffs, cursor)
+		else
+			cursor += 1
+		end
+	end
+
+	return diffs
+end
+
+function StringDiff._computeDiff(text1: string, text2: string): Diffs
+	-- Assumes that the prefix and suffix have already been trimmed off
+	-- and shortcut returns have been made so these texts must be different
+
+	local text1Length, text2Length = #text1, #text2
+
+	if text1Length == 0 then
+		-- It's simply inserting all of text2 into text1
+		return { { actionType = StringDiff.ActionTypes.Insert, value = text2 } }
+	end
+
+	if text2Length == 0 then
+		-- It's simply deleting all of text1
+		return { { actionType = StringDiff.ActionTypes.Delete, value = text1 } }
+	end
+
+	local longText = if text1Length > text2Length then text1 else text2
+	local shortText = if text1Length > text2Length then text2 else text1
+	local shortTextLength = #shortText
+
+	-- Shortcut if the shorter string exists entirely inside the longer one
+	local indexOf = if shortTextLength == 0 then nil else string.find(longText, shortText, 1, true)
+	if indexOf ~= nil then
+		local diffs = {
+			{ actionType = StringDiff.ActionTypes.Insert, value = string.sub(longText, 1, indexOf - 1) },
+			{ actionType = StringDiff.ActionTypes.Equal, value = shortText },
+			{ actionType = StringDiff.ActionTypes.Insert, value = string.sub(longText, indexOf + shortTextLength) },
+		}
+		-- Swap insertions for deletions if diff is reversed
+		if text1Length > text2Length then
+			diffs[1].actionType, diffs[3].actionType = StringDiff.ActionTypes.Delete, StringDiff.ActionTypes.Delete
+		end
+		return diffs
+	end
+
+	if shortTextLength == 1 then
+		-- Single character string
+		-- After the previous shortcut, the character can't be an equality
+		return {
+			{ actionType = StringDiff.ActionTypes.Delete, value = text1 },
+			{ actionType = StringDiff.ActionTypes.Insert, value = text2 },
+		}
+	end
+
+	return StringDiff._bisect(text1, text2)
+end
+
+function StringDiff._cleanupSemantic(diffs: Diffs): Diffs
+	-- Reduce the number of edits by eliminating semantically trivial equalities.
+	local changes = false
+	local equalities = {} -- Stack of indices where equalities are found.
+	local equalitiesLength = 0 -- Keeping our own length var is faster.
+	local lastEquality: string? = nil
+	-- Always equal to diffs[equalities[equalitiesLength]].value
+	local pointer = 1 -- Index of current position.
+	-- Number of characters that changed prior to the equality.
+	local length_insertions1 = 0
+	local length_deletions1 = 0
+	-- Number of characters that changed after the equality.
+	local length_insertions2 = 0
+	local length_deletions2 = 0
+
+	while diffs[pointer] do
+		if diffs[pointer].actionType == StringDiff.ActionTypes.Equal then -- Equality found.
+			equalitiesLength = equalitiesLength + 1
+			equalities[equalitiesLength] = pointer
+			length_insertions1 = length_insertions2
+			length_deletions1 = length_deletions2
+			length_insertions2 = 0
+			length_deletions2 = 0
+			lastEquality = diffs[pointer].value
+		else -- An insertion or deletion.
+			if diffs[pointer].actionType == StringDiff.ActionTypes.Insert then
+				length_insertions2 = length_insertions2 + #diffs[pointer].value
+			else
+				length_deletions2 = length_deletions2 + #diffs[pointer].value
+			end
+			-- Eliminate an equality that is smaller or equal to the edits on both
+			-- sides of it.
+			if
+				lastEquality
+				and (#lastEquality <= math.max(length_insertions1, length_deletions1))
+				and (#lastEquality <= math.max(length_insertions2, length_deletions2))
+			then
+				-- Duplicate record.
+				table.insert(
+					diffs,
+					equalities[equalitiesLength],
+					{ actionType = StringDiff.ActionTypes.Delete, value = lastEquality }
+				)
+				-- Change second copy to insert.
+				diffs[equalities[equalitiesLength] + 1].actionType = StringDiff.ActionTypes.Insert
+				-- Throw away the equality we just deleted.
+				equalitiesLength = equalitiesLength - 1
+				-- Throw away the previous equality (it needs to be reevaluated).
+				equalitiesLength = equalitiesLength - 1
+				pointer = (equalitiesLength > 0) and equalities[equalitiesLength] or 0
+				length_insertions1, length_deletions1 = 0, 0 -- Reset the counters.
+				length_insertions2, length_deletions2 = 0, 0
+				lastEquality = nil
+				changes = true
+			end
+		end
+		pointer = pointer + 1
+	end
+
+	-- Normalize the diff.
+	if changes then
+		StringDiff._reorderAndMerge(diffs)
+	end
+	StringDiff._cleanupSemanticLossless(diffs)
+
+	-- Find any overlaps between deletions and insertions.
+	-- e.g: <del>abcxxx</del><ins>xxxdef</ins>
+	--   -> <del>abc</del>xxx<ins>def</ins>
+	-- e.g: <del>xxxabc</del><ins>defxxx</ins>
+	--   -> <ins>def</ins>xxx<del>abc</del>
+	-- Only extract an overlap if it is as big as the edit ahead or behind it.
+	pointer = 2
+	while diffs[pointer] do
+		if
+			diffs[pointer - 1].actionType == StringDiff.ActionTypes.Delete
+			and diffs[pointer].actionType == StringDiff.ActionTypes.Insert
+		then
+			local deletion = diffs[pointer - 1].value
+			local insertion = diffs[pointer].value
+			local overlap_length1 = StringDiff._commonOverlap(deletion, insertion)
+			local overlap_length2 = StringDiff._commonOverlap(insertion, deletion)
+			if overlap_length1 >= overlap_length2 then
+				if overlap_length1 >= #deletion / 2 or overlap_length1 >= #insertion / 2 then
+					-- Overlap found.  Insert an equality and trim the surrounding edits.
+					table.insert(
+						diffs,
+						pointer,
+						{ actionType = StringDiff.ActionTypes.Equal, value = string.sub(insertion, 1, overlap_length1) }
+					)
+					diffs[pointer - 1].value = string.sub(deletion, 1, #deletion - overlap_length1)
+					diffs[pointer + 1].value = string.sub(insertion, overlap_length1 + 1)
+					pointer = pointer + 1
+				end
+			else
+				if overlap_length2 >= #deletion / 2 or overlap_length2 >= #insertion / 2 then
+					-- Reverse overlap found.
+					-- Insert an equality and swap and trim the surrounding edits.
+					table.insert(
+						diffs,
+						pointer,
+						{ actionType = StringDiff.ActionTypes.Equal, value = string.sub(deletion, 1, overlap_length2) }
+					)
+					diffs[pointer - 1] = {
+						actionType = StringDiff.ActionTypes.Insert,
+						value = string.sub(insertion, 1, #insertion - overlap_length2),
+					}
+					diffs[pointer + 1] = {
+						actionType = StringDiff.ActionTypes.Delete,
+						value = string.sub(deletion, overlap_length2 + 1),
+					}
+					pointer = pointer + 1
+				end
+			end
+			pointer = pointer + 1
+		end
+		pointer = pointer + 1
+	end
+
+	return diffs
+end
+
+function StringDiff._sharedPrefix(text1: string, text2: string): number
+	-- Uses a binary search to find the largest common prefix between the two strings
+	-- Performance analysis: http://neil.fraser.name/news/2007/10/09/
+
+	-- Shortcut common cases
+	if (#text1 == 0) or (#text2 == 0) or (string.byte(text1, 1) ~= string.byte(text2, 1)) then
+		return 0
+	end
+
+	local pointerMin = 1
+	local pointerMax = math.min(#text1, #text2)
+	local pointerMid = pointerMax
+	local pointerStart = 1
+	while pointerMin < pointerMid do
+		if string.sub(text1, pointerStart, pointerMid) == string.sub(text2, pointerStart, pointerMid) then
+			pointerMin = pointerMid
+			pointerStart = pointerMin
+		else
+			pointerMax = pointerMid
+		end
+		pointerMid = math.floor(pointerMin + (pointerMax - pointerMin) / 2)
+	end
+
+	return pointerMid
+end
+
+function StringDiff._sharedSuffix(text1: string, text2: string): number
+	-- Uses a binary search to find the largest common suffix between the two strings
+	-- Performance analysis: http://neil.fraser.name/news/2007/10/09/
+
+	-- Shortcut common cases
+	if (#text1 == 0) or (#text2 == 0) or (string.byte(text1, -1) ~= string.byte(text2, -1)) then
+		return 0
+	end
+
+	local pointerMin = 1
+	local pointerMax = math.min(#text1, #text2)
+	local pointerMid = pointerMax
+	local pointerEnd = 1
+	while pointerMin < pointerMid do
+		if string.sub(text1, -pointerMid, -pointerEnd) == string.sub(text2, -pointerMid, -pointerEnd) then
+			pointerMin = pointerMid
+			pointerEnd = pointerMin
+		else
+			pointerMax = pointerMid
+		end
+		pointerMid = math.floor(pointerMin + (pointerMax - pointerMin) / 2)
+	end
+
+	return pointerMid
+end
+
+function StringDiff._commonOverlap(text1: string, text2: string): number
+	-- Determine if the suffix of one string is the prefix of another.
+
+	-- Cache the text lengths to prevent multiple calls.
+	local text1_length = #text1
+	local text2_length = #text2
+	-- Eliminate the null case.
+	if text1_length == 0 or text2_length == 0 then
+		return 0
+	end
+	-- Truncate the longer string.
+	if text1_length > text2_length then
+		text1 = string.sub(text1, text1_length - text2_length + 1)
+	elseif text1_length < text2_length then
+		text2 = string.sub(text2, 1, text1_length)
+	end
+	local text_length = math.min(text1_length, text2_length)
+	-- Quick check for the worst case.
+	if text1 == text2 then
+		return text_length
+	end
+
+	-- Start by looking for a single character match
+	-- and increase length until no match is found.
+	-- Performance analysis: https://neil.fraser.name/news/2010/11/04/
+	local best = 0
+	local length = 1
+	while true do
+		local pattern = string.sub(text1, text_length - length + 1)
+		local found = string.find(text2, pattern, 1, true)
+		if found == nil then
+			return best
+		end
+		length = length + found - 1
+		if found == 1 or string.sub(text1, text_length - length + 1) == string.sub(text2, 1, length) then
+			best = length
+			length = length + 1
+		end
+	end
+end
+
+function StringDiff._cleanupSemanticScore(one: string, two: string): number
+	-- Given two strings, compute a score representing whether the internal
+	-- boundary falls on logical boundaries.
+	-- Scores range from 6 (best) to 0 (worst).
+
+	if (#one == 0) or (#two == 0) then
+		-- Edges are the best.
+		return 6
+	end
+
+	-- Each port of this function behaves slightly differently due to
+	-- subtle differences in each language's definition of things like
+	-- 'whitespace'.  Since this function's purpose is largely cosmetic,
+	-- the choice has been made to use each language's native features
+	-- rather than force total conformity.
+	local char1 = string.sub(one, -1)
+	local char2 = string.sub(two, 1, 1)
+	local nonAlphaNumeric1 = string.match(char1, "%W")
+	local nonAlphaNumeric2 = string.match(char2, "%W")
+	local whitespace1 = nonAlphaNumeric1 and string.match(char1, "%s")
+	local whitespace2 = nonAlphaNumeric2 and string.match(char2, "%s")
+	local lineBreak1 = whitespace1 and string.match(char1, "%c")
+	local lineBreak2 = whitespace2 and string.match(char2, "%c")
+	local blankLine1 = lineBreak1 and string.match(one, "\n\r?\n$")
+	local blankLine2 = lineBreak2 and string.match(two, "^\r?\n\r?\n")
+
+	if blankLine1 or blankLine2 then
+		-- Five points for blank lines.
+		return 5
+	elseif lineBreak1 or lineBreak2 then
+		-- Four points for line breaks
+		-- DEVIATION: Prefer to start on a line break instead of end on it
+		return if lineBreak1 then 4 else 4.5
+	elseif nonAlphaNumeric1 and not whitespace1 and whitespace2 then
+		-- Three points for end of sentences.
+		return 3
+	elseif whitespace1 or whitespace2 then
+		-- Two points for whitespace.
+		return 2
+	elseif nonAlphaNumeric1 or nonAlphaNumeric2 then
+		-- One point for non-alphanumeric.
+		return 1
+	end
+	return 0
+end
+
+function StringDiff._cleanupSemanticLossless(diffs: Diffs)
+	-- Look for single edits surrounded on both sides by equalities
+	-- which can be shifted sideways to align the edit to a word boundary.
+	-- e.g: The c<ins>at c</ins>ame. -> The <ins>cat </ins>came.
+
+	local pointer = 2
+	-- Intentionally ignore the first and last element (don't need checking).
+	while diffs[pointer + 1] do
+		local prevDiff, nextDiff = diffs[pointer - 1], diffs[pointer + 1]
+		if
+			(prevDiff.actionType == StringDiff.ActionTypes.Equal)
+			and (nextDiff.actionType == StringDiff.ActionTypes.Equal)
+		then
+			-- This is a single edit surrounded by equalities.
+			local diff = diffs[pointer]
+
+			local equality1 = prevDiff.value
+			local edit = diff.value
+			local equality2 = nextDiff.value
+
+			-- First, shift the edit as far left as possible.
+			local commonOffset = StringDiff._sharedSuffix(equality1, edit)
+			if commonOffset > 0 then
+				local commonString = string.sub(edit, -commonOffset)
+				equality1 = string.sub(equality1, 1, -commonOffset - 1)
+				edit = commonString .. string.sub(edit, 1, -commonOffset - 1)
+				equality2 = commonString .. equality2
+			end
+
+			-- Second, step character by character right, looking for the best fit.
+			local bestEquality1 = equality1
+			local bestEdit = edit
+			local bestEquality2 = equality2
+			local bestScore = StringDiff._cleanupSemanticScore(equality1, edit)
+				+ StringDiff._cleanupSemanticScore(edit, equality2)
+
+			while string.byte(edit, 1) == string.byte(equality2, 1) do
+				equality1 = equality1 .. string.sub(edit, 1, 1)
+				edit = string.sub(edit, 2) .. string.sub(equality2, 1, 1)
+				equality2 = string.sub(equality2, 2)
+				local score = StringDiff._cleanupSemanticScore(equality1, edit)
+					+ StringDiff._cleanupSemanticScore(edit, equality2)
+				-- The > (rather than >=) encourages leading rather than trailing whitespace on edits.
+				-- I just think it looks better for indentation changes to start the line,
+				-- since then indenting several lines all have aligned diffs at the start
+				if score > bestScore then
+					bestScore = score
+					bestEquality1 = equality1
+					bestEdit = edit
+					bestEquality2 = equality2
+				end
+			end
+			if prevDiff.value ~= bestEquality1 then
+				-- We have an improvement, save it back to the diff.
+				if #bestEquality1 > 0 then
+					diffs[pointer - 1].value = bestEquality1
+				else
+					table.remove(diffs, pointer - 1)
+					pointer = pointer - 1
+				end
+				diffs[pointer].value = bestEdit
+				if #bestEquality2 > 0 then
+					diffs[pointer + 1].value = bestEquality2
+				else
+					table.remove(diffs, pointer + 1)
+					pointer = pointer - 1
+				end
+			end
+		end
+		pointer = pointer + 1
+	end
+end
+
+function StringDiff._bisect(text1: string, text2: string): Diffs
+	-- Find the 'middle snake' of a diff, split the problem in two
+	-- and return the recursively constructed diff
+	-- See Myers 1986 paper: An O(ND) Difference Algorithm and Its Variations
+
+	-- Cache the text lengths to prevent multiple calls
+	local text1Length = #text1
+	local text2Length = #text2
+
+	local _sub, _element
+	local maxD = math.ceil((text1Length + text2Length) / 2)
+	local vOffset = maxD
+	local vLength = 2 * maxD
+	local v1 = table.create(vLength)
+	local v2 = table.create(vLength)
+
+	-- Setting all elements to -1 is faster in Lua than mixing integers and nil
+	for x = 0, vLength - 1 do
+		v1[x] = -1
+		v2[x] = -1
+	end
+	v1[vOffset + 1] = 0
+	v2[vOffset + 1] = 0
+	local delta = text1Length - text2Length
+
+	-- If the total number of characters is odd, then
+	-- the front path will collide with the reverse path
+	local front = (delta % 2 ~= 0)
+
+	-- Offsets for start and end of k loop
+	-- Prevents mapping of space beyond the grid
+	local k1Start = 0
+	local k1End = 0
+	local k2Start = 0
+	local k2End = 0
+	for d = 0, maxD - 1 do
+		-- Walk the front path one step
+		for k1 = -d + k1Start, d - k1End, 2 do
+			local k1_offset = vOffset + k1
+			local x1
+			if (k1 == -d) or ((k1 ~= d) and (v1[k1_offset - 1] < v1[k1_offset + 1])) then
+				x1 = v1[k1_offset + 1]
+			else
+				x1 = v1[k1_offset - 1] + 1
+			end
+			local y1 = x1 - k1
+			while
+				(x1 <= text1Length)
+				and (y1 <= text2Length)
+				and (string.sub(text1, x1, x1) == string.sub(text2, y1, y1))
+			do
+				x1 = x1 + 1
+				y1 = y1 + 1
+			end
+			v1[k1_offset] = x1
+			if x1 > text1Length + 1 then
+				-- Ran off the right of the graph
+				k1End = k1End + 2
+			elseif y1 > text2Length + 1 then
+				-- Ran off the bottom of the graph
+				k1Start = k1Start + 2
+			elseif front then
+				local k2_offset = vOffset + delta - k1
+				if k2_offset >= 0 and k2_offset < vLength and v2[k2_offset] ~= -1 then
+					-- Mirror x2 onto top-left coordinate system
+					local x2 = text1Length - v2[k2_offset] + 1
+					if x1 > x2 then
+						-- Overlap detected
+						return StringDiff._bisectSplit(text1, text2, x1, y1)
+					end
+				end
+			end
+		end
+
+		-- Walk the reverse path one step
+		for k2 = -d + k2Start, d - k2End, 2 do
+			local k2_offset = vOffset + k2
+			local x2
+			if (k2 == -d) or ((k2 ~= d) and (v2[k2_offset - 1] < v2[k2_offset + 1])) then
+				x2 = v2[k2_offset + 1]
+			else
+				x2 = v2[k2_offset - 1] + 1
+			end
+			local y2 = x2 - k2
+			while
+				(x2 <= text1Length)
+				and (y2 <= text2Length)
+				and (string.sub(text1, -x2, -x2) == string.sub(text2, -y2, -y2))
+			do
+				x2 = x2 + 1
+				y2 = y2 + 1
+			end
+			v2[k2_offset] = x2
+			if x2 > text1Length + 1 then
+				-- Ran off the left of the graph
+				k2End = k2End + 2
+			elseif y2 > text2Length + 1 then
+				-- Ran off the top of the graph
+				k2Start = k2Start + 2
+			elseif not front then
+				local k1_offset = vOffset + delta - k2
+				if k1_offset >= 0 and k1_offset < vLength and v1[k1_offset] ~= -1 then
+					local x1 = v1[k1_offset]
+					local y1 = vOffset + x1 - k1_offset
+					-- Mirror x2 onto top-left coordinate system
+					x2 = text1Length - x2 + 1
+					if x1 > x2 then
+						-- Overlap detected
+						return StringDiff._bisectSplit(text1, text2, x1, y1)
+					end
+				end
+			end
+		end
+	end
+
+	-- Number of diffs equals number of characters, no commonality at all
+	return {
+		{ actionType = StringDiff.ActionTypes.Delete, value = text1 },
+		{ actionType = StringDiff.ActionTypes.Insert, value = text2 },
+	}
+end
+
+function StringDiff._bisectSplit(text1: string, text2: string, x: number, y: number): Diffs
+	-- Given the location of the 'middle snake',
+	-- split the diff in two parts and recurse
+
+	local text1a = string.sub(text1, 1, x - 1)
+	local text2a = string.sub(text2, 1, y - 1)
+	local text1b = string.sub(text1, x)
+	local text2b = string.sub(text2, y)
+
+	-- Compute both diffs serially
+	local diffs = StringDiff.findDiffs(text1a, text2a)
+	local diffsB = StringDiff.findDiffs(text1b, text2b)
+
+	-- Merge diffs
+	table.move(diffsB, 1, #diffsB, #diffs + 1, diffs)
+	return diffs
+end
+
+function StringDiff._reorderAndMerge(diffs: Diffs): Diffs
+	-- Reorder and merge like edit sections and merge equalities
+	-- Any edit section can move as long as it doesn't cross an equality
+
+	-- Add a dummy entry at the end
+	table.insert(diffs, { actionType = StringDiff.ActionTypes.Equal, value = "" })
+
+	local pointer = 1
+	local countDelete, countInsert = 0, 0
+	local textDelete, textInsert = "", ""
+	local commonLength
+	while diffs[pointer] do
+		local actionType = diffs[pointer].actionType
+		if actionType == StringDiff.ActionTypes.Insert then
+			countInsert = countInsert + 1
+			textInsert = textInsert .. diffs[pointer].value
+			pointer = pointer + 1
+		elseif actionType == StringDiff.ActionTypes.Delete then
+			countDelete = countDelete + 1
+			textDelete = textDelete .. diffs[pointer].value
+			pointer = pointer + 1
+		elseif actionType == StringDiff.ActionTypes.Equal then
+			-- Upon reaching an equality, check for prior redundancies
+			if countDelete + countInsert > 1 then
+				if (countDelete > 0) and (countInsert > 0) then
+					-- Factor out any common prefixies
+					commonLength = StringDiff._sharedPrefix(textInsert, textDelete)
+					if commonLength > 0 then
+						local back_pointer = pointer - countDelete - countInsert
+						if
+							(back_pointer > 1) and (diffs[back_pointer - 1].actionType == StringDiff.ActionTypes.Equal)
+						then
+							diffs[back_pointer - 1].value = diffs[back_pointer - 1].value
+								.. string.sub(textInsert, 1, commonLength)
+						else
+							table.insert(diffs, 1, {
+								actionType = StringDiff.ActionTypes.Equal,
+								value = string.sub(textInsert, 1, commonLength),
+							})
+							pointer = pointer + 1
+						end
+						textInsert = string.sub(textInsert, commonLength + 1)
+						textDelete = string.sub(textDelete, commonLength + 1)
+					end
+					-- Factor out any common suffixies
+					commonLength = StringDiff._sharedSuffix(textInsert, textDelete)
+					if commonLength ~= 0 then
+						diffs[pointer].value = string.sub(textInsert, -commonLength) .. diffs[pointer].value
+						textInsert = string.sub(textInsert, 1, -commonLength - 1)
+						textDelete = string.sub(textDelete, 1, -commonLength - 1)
+					end
+				end
+				-- Delete the offending records and add the merged ones
+				pointer = pointer - countDelete - countInsert
+				for _ = 1, countDelete + countInsert do
+					table.remove(diffs, pointer)
+				end
+				if #textDelete > 0 then
+					table.insert(diffs, pointer, { actionType = StringDiff.ActionTypes.Delete, value = textDelete })
+					pointer = pointer + 1
+				end
+				if #textInsert > 0 then
+					table.insert(diffs, pointer, { actionType = StringDiff.ActionTypes.Insert, value = textInsert })
+					pointer = pointer + 1
+				end
+				pointer = pointer + 1
+			elseif (pointer > 1) and (diffs[pointer - 1].actionType == StringDiff.ActionTypes.Equal) then
+				-- Merge this equality with the previous one
+				diffs[pointer - 1].value = diffs[pointer - 1].value .. diffs[pointer].value
+				table.remove(diffs, pointer)
+			else
+				pointer = pointer + 1
+			end
+			countInsert, countDelete = 0, 0
+			textDelete, textInsert = "", ""
+		end
+	end
+	if diffs[#diffs].value == "" then
+		-- Remove the dummy entry at the end
+		diffs[#diffs] = nil
+	end
+
+	-- Second pass: look for single edits surrounded on both sides by equalities
+	-- which can be shifted sideways to eliminate an equality
+	-- e.g: A<ins>BA</ins>C -> <ins>AB</ins>AC
+	local changes = false
+	pointer = 2
+	-- Intentionally ignore the first and last element (don't need checking)
+	while pointer < #diffs do
+		local prevDiff, nextDiff = diffs[pointer - 1], diffs[pointer + 1]
+		if
+			(prevDiff.actionType == StringDiff.ActionTypes.Equal)
+			and (nextDiff.actionType == StringDiff.ActionTypes.Equal)
+		then
+			-- This is a single edit surrounded by equalities
+			local currentDiff = diffs[pointer]
+			local currentText = currentDiff.value
+			local prevText = prevDiff.value
+			local nextText = nextDiff.value
+			if #prevText == 0 then
+				table.remove(diffs, pointer - 1)
+				changes = true
+			elseif string.sub(currentText, -#prevText) == prevText then
+				-- Shift the edit over the previous equality
+				currentDiff.value = prevText .. string.sub(currentText, 1, -#prevText - 1)
+				nextDiff.value = prevText .. nextDiff.value
+				table.remove(diffs, pointer - 1)
+				changes = true
+			elseif string.sub(currentText, 1, #nextText) == nextText then
+				-- Shift the edit over the next equality
+				prevDiff.value = prevText .. nextText
+				currentDiff.value = string.sub(currentText, #nextText + 1) .. nextText
+				table.remove(diffs, pointer + 1)
+				changes = true
+			end
+		end
+		pointer = pointer + 1
+	end
+
+	-- If shifts were made, the diffs need reordering and another shift sweep
+	if changes then
+		return StringDiff._reorderAndMerge(diffs)
+	end
+
+	return diffs
+end
+
+return StringDiff