Release 6.2.0

Closes #369.

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        rust_version: [stable, "1.46.0"]
+        rust_version: [stable, "1.43.1"]
 
     steps:
     - uses: actions/checkout@v1

CHANGELOG.md

@@ -2,102 +2,21 @@
 
 ## Unreleased Changes
 
-## [7.0.0-rc.1][7.0.0-rc.1] (August 23, 2021)
+## [6.2.0][6.2.0] (June 10, 2021)
-In Rojo 6 and previous Rojo 7 alphas, an explicit Vector3 property would be written like this:
-
-```json
-{
-    "className": "Part",
-    "properties": {
-        "Position": {
-            "Type": "Vector3",
-            "Value": [1, 2, 3]
-        }
-    }
-}
-```
-
-For Rojo 7, this will need to be changed to:
-
-```json
-{
-    "className": "Part",
-    "properties": {
-        "Position": {
-            "Vector3": [1, 2, 3]
-        }
-    }
-}
-```
-
-The shorthand property format that most users use is not impacted. For reference, it looks like this:
-
-```json
-{
-    "className": "Part",
-    "properties": {
-        "Position": [1, 2, 3]
-    }
-}
-```
-
-* Major breaking change: changed property syntax for project files; shorthand syntax is unchanged.
-* Added the `fmt-project` subcommand for formatting Rojo project files.
-* Improved error output for many subcommands.
-* Updated to stable versions of rbx-dom libraries.
-* Updated async infrastructure, which should fix a handful of bugs. ([#459][#459])
-* Fixed syncing refs in the Roblox Studio plugin ([#462][#462], [#466][#466])
-* Added support for long paths on Windows. ([#464][#464])
-
-[#459]: https://github.com/rojo-rbx/rojo/pull/459
-[#462]: https://github.com/rojo-rbx/rojo/pull/462
-[#464]: https://github.com/rojo-rbx/rojo/pull/464
-[#466]: https://github.com/rojo-rbx/rojo/pull/466
-[7.0.0-rc.1]: https://github.com/rojo-rbx/rojo/releases/tag/v7.0.0-rc.1
-
-## [7.0.0-alpha.4][7.0.0-alpha.4] (May 5, 2021)
-* Added the `gameId` and `placeId` optional properties to project files.
-    * When connecting from the Rojo Roblox Studio plugin, Rojo will set the game and place ID of the current place to these values, if set.
-    * This is equivalent to running `game:SetUniverseId(...)` and `game:SetPlaceId(...)` from the command bar in Studio. 
 * Added "EXPERIMENTAL!" label to two-way sync toggle in Rojo's Roblox Studio plugin.
-* Fixed `Name` and `Parent` properties being allowed in Rojo projects. ([#413][pr-413])
+* Fixed "Open Scripts Externally" feature crashing Studio ([#369][issue-369])
-* Fixed "Open Scripts Externally" feature crashing Studio. ([#369][issue-369])
+* Updated dependencies, fixing `HumanoidDescription` ID issues.
-* Empty `.model.json` files will no longer cause errors. ([#420][pr-420])
-* When specifying `$path` on a service, Rojo now keeps the correct class name. ([#331][issue-331])
-* Improved error messages for misconfigured projects.
 
-[issue-331]: https://github.com/rojo-rbx/rojo/issues/331
 [issue-369]: https://github.com/rojo-rbx/rojo/issues/369
-[pr-420]: https://github.com/rojo-rbx/rojo/pull/420
+[6.2.0]: https://github.com/rojo-rbx/rojo/releases/tag/v6.2.0
-[pr-413]: https://github.com/rojo-rbx/rojo/pull/413
+
-[7.0.0-alpha.4]: https://github.com/rojo-rbx/rojo/releases/tag/v7.0.0-alpha.4
+## [6.1.0][6.1.0] (April 12, 2021)
+* Updated dependencies, fixing OptionalCoordinateFrame-related issues.
 
-## [7.0.0-alpha.3][7.0.0-alpha.3] (February 19, 2021)
-* Updated dependencies, fixing `OptionalCoordinateFrame`-related issues.
 * Added `--address` flag to `rojo serve` to allow for external connections. ([#403][pr-403])
 
 [pr-403]: https://github.com/rojo-rbx/rojo/pull/403
-[7.0.0-alpha.3]: https://github.com/rojo-rbx/rojo/releases/tag/v7.0.0-alpha.3
+[6.1.0]: https://github.com/rojo-rbx/rojo/releases/tag/v6.1.0
-
-## [7.0.0-alpha.2][7.0.0-alpha.2] (February 19, 2021)
-* Fixed incorrect protocol version between the client and server.
-
-[7.0.0-alpha.2]: https://github.com/rojo-rbx/rojo/releases/tag/v7.0.0-alpha.2
-
-## [7.0.0-alpha.1][7.0.0-alpha.1] (February 18, 2021)
-This release includes a brand new implementation of the Roblox DOM. It brings performance improvements, much better support for `rbxl` and `rbxm` files, and a better internal API.
-
-* Added support for all remaining property types.
-* Added support for the entire Roblox binary model format.
-* Changed `rojo upload` to upload binary places and models instead of XML.
-    * This should make using `rojo upload` much more feasible for large places.
-* **Breaking**: Changed format of some types of values in `project.json`, `model.json`, and `meta.json` files.
-    * This should impact few projects. See [this file][allValues.json] for new examples of each property type.
-
-Formatting of types will change more before the stable release of Rojo 7. We're hoping to use this opportunity to normalize some of the case inconsistency introduced in Rojo 0.5.
-
-[7.0.0-alpha.1]: https://github.com/rojo-rbx/rojo/releases/tag/v7.0.0-alpha.1
-[allValues.json]: https://github.com/rojo-rbx/rojo/blob/f4a790eb50b74e482000bad1dcfe22533992fb20/plugin/rbx_dom_lua/src/allValues.json
 
 ## [6.0.2](https://github.com/rojo-rbx/rojo/releases/tag/v6.0.2) (February 9, 2021)
 * Fixed `rojo upload` to handle CSRF challenges.

CONTRIBUTING.md

@@ -41,9 +41,9 @@ The Rojo release process is pretty manual right now. If you need to do it, here'
 6. Tag the commit with the version from `Cargo.toml` prepended with a v, like `v0.4.13`
 7. Publish the CLI
     * `cargo publish`
-8. Publish the Plugin
+8. Build and upload the plugin
-    * `rojo publish plugin --asset_id 6415005344`
     * `rojo build plugin -o Rojo.rbxm`
+    * Upload `Rojo.rbxm` to Roblox.com, keep it for later
 9. Push commits and tags
     * `git push && git push --tags`
 10. Copy GitHub release content from previous release

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rojo"
-version = "7.0.0-rc.1"
+version = "6.2.0"
 authors = ["Lucien Greathouse <me@lpghatguy.com>"]
 description = "Enables professional-grade development tools for Roblox developers"
 license = "MPL-2.0"
@@ -9,7 +9,6 @@ documentation = "https://rojo.space/docs"
 repository = "https://github.com/rojo-rbx/rojo"
 readme = "README.md"
 edition = "2018"
-build = "build.rs"
 
 exclude = [
     "/test-projects/**",
@@ -46,58 +45,48 @@ name = "build"
 harness = false
 
 [dependencies]
-memofs = { version = "0.2.0", path = "memofs" }
+memofs = { version = "0.1.2", path = "memofs" }
-
-# These dependencies can be uncommented when working on rbx-dom simultaneously
-# rbx_binary = { path = "../rbx-dom/rbx_binary" }
-# 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 = "0.6.1"
-rbx_dom_weak = "2.1.0"
-rbx_reflection = "4.1.0"
-rbx_reflection_database = "0.2.1"
-rbx_xml = "0.12.1"
 
 anyhow = "1.0.27"
 backtrace = "0.3"
 bincode = "1.2.1"
-crossbeam-channel = "0.5.1"
+crossbeam-channel = "0.4.0"
 csv = "1.1.1"
-env_logger = "0.9.0"
+env_logger = "0.7.1"
 fs-err = "2.2.0"
-futures = "0.3.16"
+futures = "0.1.29"
 globset = "0.4.4"
-humantime = "2.1.0"
+humantime = "1.3.0"
-hyper = { version = "0.14.11", features = ["server", "tcp", "http1"] }
+hyper = "0.12.35"
 jod-thread = "0.1.0"
 lazy_static = "1.4.0"
 log = "0.4.8"
 maplit = "1.0.1"
 notify = "4.0.14"
-opener = "0.5.0"
+opener = "0.4.1"
+rbx_binary = "0.5.0"
+rbx_dom_weak = "1.10.1"
+rbx_reflection = "3.3.408"
+rbx_xml = "0.11.3"
 regex = "1.3.1"
 reqwest = "0.9.20"
 ritz = "0.1.0"
 rlua = "0.17.0"
-roblox_install = "1.0.0"
+roblox_install = "0.2.2"
 serde = { version = "1.0", features = ["derive", "rc"] }
 serde_json = "1.0"
 structopt = "0.3.5"
 termcolor = "1.0.5"
 thiserror = "1.0.11"
-tokio = { version = "1.9.0", features = ["rt", "rt-multi-thread"] }
+tokio = "0.1.22"
 uuid = { version = "0.8.1", features = ["v4", "serde"] }
 
 [target.'cfg(windows)'.dependencies]
-winreg = "0.9.0"
+winreg = "0.6.2"
 
 [build-dependencies]
-memofs = { version = "0.2.0", path = "memofs" }
+memofs = { version = "0.1.3", path = "memofs" }
 
-embed-resource = "1.6"
 anyhow = "1.0.27"
 bincode = "1.2.1"
 fs-err = "2.3.0"
@@ -109,8 +98,8 @@ rojo-insta-ext = { path = "rojo-insta-ext" }
 criterion = "0.3"
 insta = { version = "1.3.0", features = ["redactions"] }
 lazy_static = "1.2"
-paste = "1.0.5"
+paste = "0.1"
-pretty_assertions = "0.7.2"
+pretty_assertions = "0.6.1"
 serde_yaml = "0.8.9"
 tempfile = "3.0"
 walkdir = "2.1"

README.md

@@ -1,13 +1,21 @@
 <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/logo-512.png" alt="Rojo" height="217" />
+    </a>
 </div>
 
 <div>&nbsp;</div>
 
 <div align="center">
-    <a href="https://github.com/rojo-rbx/rojo/actions"><img src="https://github.com/rojo-rbx/rojo/workflows/CI/badge.svg" alt="Actions status" /></a>
+    <a href="https://github.com/rojo-rbx/rojo/actions">
-    <a href="https://crates.io/crates/rojo"><img src="https://img.shields.io/crates/v/rojo.svg?label=latest%20release" alt="Latest server version" /></a>
+        <img src="https://github.com/rojo-rbx/rojo/workflows/CI/badge.svg" alt="Actions status" />
-    <a href="https://rojo.space/docs"><img src="https://img.shields.io/badge/docs-website-brightgreen.svg" alt="Rojo Documentation" /></a>
+    </a>
+    <a href="https://crates.io/crates/rojo">
+        <img src="https://img.shields.io/crates/v/rojo.svg?label=latest%20release" alt="Latest server version" />
+    </a>
+    <a href="https://rojo.space/docs">
+        <img src="https://img.shields.io/badge/docs-website-brightgreen.svg" alt="Rojo Documentation" />
+    </a>
 </div>
 
 <hr />
@@ -40,7 +48,7 @@ Check out our [contribution guide](CONTRIBUTING.md) for detailed instructions fo
 
 Pull requests are welcome!
 
-Rojo supports Rust 1.46.0 and newer. The minimum supported version of Rust is based on the latest versions of the dependencies that Rojo has.
+Rojo supports Rust 1.43.1 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.

build.rs

@@ -73,9 +73,5 @@ fn main() -> Result<(), anyhow::Error> {
 
     bincode::serialize_into(out_file, &snapshot)?;
 
-    println!("cargo:rerun-if-changed=build/windows/rojo-manifest.rc");
-    println!("cargo:rerun-if-changed=build/windows/rojo.manifest");
-    embed_resource::compile("build/windows/rojo-manifest.rc");
-
     Ok(())
 }

build/windows/rojo-manifest.rc

@@ -1,2 +0,0 @@
-#define RT_MANIFEST 24
-1 RT_MANIFEST "rojo.manifest"

build/windows/rojo.manifest

@@ -1,8 +0,0 @@
-<?xml version='1.0' encoding='utf-8' standalone='yes'?>
-<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
-  <application xmlns="urn:schemas-microsoft-com:asm.v3">
-    <windowsSettings xmlns:ws2="http://schemas.microsoft.com/SMI/2016/WindowsSettings">
-      <ws2:longPathAware>true</ws2:longPathAware>
-    </windowsSettings>
-  </application>
-</assembly>

foreman.toml

@@ -1,3 +1,3 @@
 [tools]
-rojo = { source = "rojo-rbx/rojo", version = "6.1.0" }
+rojo = { source = "rojo-rbx/rojo", version = "6.0.0-rc.3" }
 run-in-roblox = { source = "rojo-rbx/run-in-roblox", version = "0.3.0" }

memofs/CHANGELOG.md

@@ -2,9 +2,6 @@
 
 ## Unreleased Changes
 
-## 0.2.0 (2021-08-23)
-* Updated to `crossbeam-channel` 0.5.1.
-
 ## 0.1.3 (2020-11-19)
 * Added `set_watch_enabled` to `Vfs` and `VfsLock` to allow turning off file watching.
 

memofs/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "memofs"
 description = "Virtual filesystem with configurable backends."
-version = "0.2.0"
+version = "0.1.3"
 authors = ["Lucien Greathouse <me@lpghatguy.com>"]
 edition = "2018"
 readme = "README.md"
@@ -11,7 +11,7 @@ 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 = "0.4.0"
 fs-err = "2.3.0"
 notify = "4.0.15"
 serde = { version = "1.0", features = ["derive"] }

plugin/rbx_dom_lua/.luacheckrc

@@ -0,0 +1,44 @@
+stds.roblox = {
+	read_globals = {
+		game = {
+			other_fields = true,
+		},
+
+		-- Roblox globals
+		"script",
+
+		-- Extra functions
+		"tick", "warn",
+		"wait", "typeof",
+
+		-- Types
+		"CFrame",
+		"Color3",
+		"Enum",
+		"Instance",
+		"NumberRange",
+		"Rect",
+		"UDim", "UDim2",
+		"Vector2", "Vector3",
+		"Vector2int16", "Vector3int16",
+	}
+}
+
+stds.testez = {
+	read_globals = {
+		"describe",
+		"it", "itFOCUS", "itSKIP",
+		"FOCUS", "SKIP", "HACK_NO_XPCALL",
+		"expect",
+	}
+}
+
+ignore = {
+	"212", -- unused arguments
+}
+
+std = "lua51+roblox"
+
+files["**/*.spec.lua"] = {
+	std = "+testez",
+}

plugin/rbx_dom_lua/EncodedValue.lua

@@ -1,457 +0,0 @@
-local base64 = require(script.Parent.base64)
-
-local function identity(...)
-	return ...
-end
-
-local function unpackDecoder(f)
-	return function(value)
-		return f(unpack(value))
-	end
-end
-
-local function serializeFloat(value)
-	-- TODO: Figure out a better way to serialize infinity and NaN, neither of
-	-- which fit into JSON.
-	if value == math.huge or value == -math.huge then
-		return 999999999 * math.sign(value)
-	end
-
-	return value
-end
-
-local ALL_AXES = {"X", "Y", "Z"}
-local ALL_FACES = {"Right", "Top", "Back", "Left", "Bottom", "Front"}
-
-local types
-types = {
-	Axes = {
-		fromPod = function(pod)
-			local axes = {}
-
-			for index, axisName in ipairs(pod) do
-				axes[index] = Enum.Axis[axisName]
-			end
-
-			return Axes.new(unpack(axes))
-		end,
-
-		toPod = function(roblox)
-			local json = {}
-
-			for _, axis in ipairs(ALL_AXES) do
-				if roblox[axis] then
-					table.insert(json, axis)
-				end
-			end
-
-			return json
-		end,
-	},
-
-	BinaryString = {
-		fromPod = base64.decode,
-		toPod = base64.encode,
-	},
-
-	Bool = {
-		fromPod = identity,
-		toPod = identity,
-	},
-
-	BrickColor = {
-		fromPod = function(pod)
-			return BrickColor.new(pod)
-		end,
-
-		toPod = function(roblox)
-			return roblox.Number
-		end,
-	},
-
-	CFrame = {
-		fromPod = function(pod)
-			local pos = pod.position
-			local orient = pod.orientation
-
-			return CFrame.new(
-				pos[1], pos[2], pos[3],
-				orient[1][1], orient[1][2], orient[1][3],
-				orient[2][1], orient[2][2], orient[2][3],
-				orient[3][1], orient[3][2], orient[3][3]
-			)
-		end,
-
-		toPod = function(roblox)
-			local x, y, z,
-				r00, r01, r02,
-				r10, r11, r12,
-				r20, r21, r22 = roblox:GetComponents()
-
-			return {
-				position = {x, y, z},
-				orientation = {
-					{r00, r01, r02},
-					{r10, r11, r12},
-					{r20, r21, r22},
-				},
-			}
-		end,
-	},
-
-	Color3 = {
-		fromPod = unpackDecoder(Color3.new),
-
-		toPod = function(roblox)
-			return {roblox.r, roblox.g, roblox.b}
-		end,
-	},
-
-	Color3uint8 = {
-		fromPod = unpackDecoder(Color3.fromRGB),
-
-		toPod = function(roblox)
-			return {
-				math.round(roblox.R * 255),
-				math.round(roblox.G * 255),
-				math.round(roblox.B * 255),
-			}
-		end,
-	},
-
-	ColorSequence = {
-		fromPod = function(pod)
-			local keypoints = {}
-
-			for index, keypoint in ipairs(pod.keypoints) do
-				keypoints[index] = ColorSequenceKeypoint.new(
-					keypoint.time,
-					types.Color3.fromPod(keypoint.color)
-				)
-			end
-
-			return ColorSequence.new(keypoints)
-		end,
-
-		toPod = function(roblox)
-			local keypoints = {}
-
-			for index, keypoint in ipairs(roblox.Keypoints) do
-				keypoints[index] = {
-					time = keypoint.Time,
-					color = types.Color3.toPod(keypoint.Value),
-				}
-			end
-
-			return {
-				keypoints = keypoints,
-			}
-		end,
-	},
-
-	Content = {
-		fromPod = identity,
-		toPod = identity,
-	},
-
-	Enum = {
-		fromPod = identity,
-
-		toPod = function(roblox)
-			-- FIXME: More robust handling of enums
-			if typeof(roblox) == "number" then
-				return roblox
-			else
-				return roblox.Value
-			end
-		end,
-	},
-
-	Faces = {
-		fromPod = function(pod)
-			local faces = {}
-
-			for index, faceName in ipairs(pod) do
-				faces[index] = Enum.NormalId[faceName]
-			end
-
-			return Faces.new(unpack(faces))
-		end,
-
-		toPod = function(roblox)
-			local pod = {}
-
-			for _, face in ipairs(ALL_FACES) do
-				if roblox[face] then
-					table.insert(pod, face)
-				end
-			end
-
-			return pod
-		end,
-	},
-
-	Float32 = {
-		fromPod = identity,
-		toPod = serializeFloat,
-	},
-
-	Float64 = {
-		fromPod = identity,
-		toPod = serializeFloat,
-	},
-
-	Int32 = {
-		fromPod = identity,
-		toPod = identity,
-	},
-
-	Int64 = {
-		fromPod = identity,
-		toPod = identity,
-	},
-
-	NumberRange = {
-		fromPod = unpackDecoder(NumberRange.new),
-
-		toPod = function(roblox)
-			return {roblox.Min, roblox.Max}
-		end,
-	},
-
-	NumberSequence = {
-		fromPod = function(pod)
-			local keypoints = {}
-
-			for index, keypoint in ipairs(pod.keypoints) do
-				keypoints[index] = NumberSequenceKeypoint.new(
-					keypoint.time,
-					keypoint.value,
-					keypoint.envelope
-				)
-			end
-
-			return NumberSequence.new(keypoints)
-		end,
-
-		toPod = function(roblox)
-			local keypoints = {}
-
-			for index, keypoint in ipairs(roblox.Keypoints) do
-				keypoints[index] = {
-					time = keypoint.Time,
-					value = keypoint.Value,
-					envelope = keypoint.Envelope,
-				}
-			end
-
-			return {
-				keypoints = keypoints,
-			}
-		end,
-	},
-
-	PhysicalProperties = {
-		fromPod = function(pod)
-			if pod == "Default" then
-				return nil
-			else
-				return PhysicalProperties.new(
-					pod.density,
-					pod.friction,
-					pod.elasticity,
-					pod.frictionWeight,
-					pod.elasticityWeight
-				)
-			end
-		end,
-
-		toPod = function(roblox)
-			if roblox == nil then
-				return "Default"
-			else
-				return {
-					density = roblox.Density,
-					friction = roblox.Friction,
-					elasticity = roblox.Elasticity,
-					frictionWeight = roblox.FrictionWeight,
-					elasticityWeight = roblox.ElasticityWeight,
-				}
-			end
-		end,
-	},
-
-	Ray = {
-		fromPod = function(pod)
-			return Ray.new(
-				types.Vector3.fromPod(pod.origin),
-				types.Vector3.fromPod(pod.direction)
-			)
-		end,
-
-		toPod = function(roblox)
-			return {
-				origin = types.Vector3.toPod(roblox.Origin),
-				direction = types.Vector3.toPod(roblox.Direction),
-			}
-		end,
-	},
-
-	Rect = {
-		fromPod = function(pod)
-			return Rect.new(
-				types.Vector2.fromPod(pod[1]),
-				types.Vector2.fromPod(pod[2])
-			)
-		end,
-
-		toPod = function(roblox)
-			return {
-				types.Vector2.toPod(roblox.Min),
-				types.Vector2.toPod(roblox.Max),
-			}
-		end,
-	},
-
-	Ref = {
-		fromPod = function(_pod)
-			error("Ref cannot be decoded on its own")
-		end,
-
-		toPod = function(_roblox)
-			error("Ref can not be encoded on its own")
-		end,
-	},
-
-	Region3 = {
-		fromPod = function(pod)
-			error("Region3 is not implemented")
-		end,
-
-		toPod = function(roblox)
-			error("Region3 is not implemented")
-		end,
-	},
-
-	Region3int16 = {
-		fromPod = function(pod)
-			return Region3int16.new(
-				types.Vector3int16.fromPod(pod[1]),
-				types.Vector3int16.fromPod(pod[2])
-			)
-		end,
-
-		toPod = function(roblox)
-			return {
-				types.Vector3int16.toPod(roblox.Min),
-				types.Vector3int16.toPod(roblox.Max),
-			}
-		end,
-	},
-
-	SharedString = {
-		fromPod = function(pod)
-			error("SharedString is not supported")
-		end,
-
-		toPod = function(roblox)
-			error("SharedString is not supported")
-		end,
-	},
-
-	String = {
-		fromPod = identity,
-		toPod = identity,
-	},
-
-	UDim = {
-		fromPod = unpackDecoder(UDim.new),
-
-		toPod = function(roblox)
-			return {roblox.Scale, roblox.Offset}
-		end,
-	},
-
-	UDim2 = {
-		fromPod = function(pod)
-			return UDim2.new(
-				types.UDim.fromPod(pod[1]),
-				types.UDim.fromPod(pod[2])
-			)
-		end,
-
-		toPod = function(roblox)
-			return {
-				types.UDim.toPod(roblox.X),
-				types.UDim.toPod(roblox.Y),
-			}
-		end,
-	},
-
-	Vector2 = {
-		fromPod = unpackDecoder(Vector2.new),
-
-		toPod = function(roblox)
-			return {
-				serializeFloat(roblox.X),
-				serializeFloat(roblox.Y),
-			}
-		end,
-	},
-
-	Vector2int16 = {
-		fromPod = unpackDecoder(Vector2int16.new),
-
-		toPod = function(roblox)
-			return {roblox.X, roblox.Y}
-		end,
-	},
-
-	Vector3 = {
-		fromPod = unpackDecoder(Vector3.new),
-
-		toPod = function(roblox)
-			return {
-				serializeFloat(roblox.X),
-				serializeFloat(roblox.Y),
-				serializeFloat(roblox.Z),
-			}
-		end,
-	},
-
-	Vector3int16 = {
-		fromPod = unpackDecoder(Vector3int16.new),
-
-		toPod = function(roblox)
-			return {roblox.X, roblox.Y, roblox.Z}
-		end,
-	},
-}
-
-local EncodedValue = {}
-
-function EncodedValue.decode(encodedValue)
-	local ty, value = next(encodedValue)
-
-	local typeImpl = types[ty]
-	if typeImpl == nil then
-		return false, "Couldn't decode value " .. tostring(ty)
-	end
-
-	return true, typeImpl.fromPod(value)
-end
-
-function EncodedValue.encode(rbxValue, propertyType)
-	assert(propertyType ~= nil, "Property type descriptor is required")
-
-	local typeImpl = types[propertyType]
-	if typeImpl == nil then
-		return false, ("Missing encoder for property type %q"):format(propertyType)
-	end
-
-	return true, {
-		[propertyType] = typeImpl.toPod(rbxValue),
-	}
-end
-
-return EncodedValue

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/README.md

@@ -0,0 +1,2 @@
+# rbx_dom_lua
+Roblox Lua implementation of rbx-dom mechanisms, intended to work with rbx_dom_weak and friends.

plugin/rbx_dom_lua/allValues.json

@@ -1,316 +0,0 @@
-{
-  "Axes": {
-    "value": {
-      "Axes": [
-        "X",
-        "Y",
-        "Z"
-      ]
-    },
-    "ty": "Axes"
-  },
-  "BinaryString": {
-    "value": {
-      "BinaryString": "SGVsbG8h"
-    },
-    "ty": "BinaryString"
-  },
-  "Bool": {
-    "value": {
-      "Bool": true
-    },
-    "ty": "Bool"
-  },
-  "BrickColor": {
-    "value": {
-      "BrickColor": 1004
-    },
-    "ty": "BrickColor"
-  },
-  "CFrame": {
-    "value": {
-      "CFrame": {
-        "position": [
-          1.0,
-          2.0,
-          3.0
-        ],
-        "orientation": [
-          [
-            4.0,
-            5.0,
-            6.0
-          ],
-          [
-            7.0,
-            8.0,
-            9.0
-          ],
-          [
-            10.0,
-            11.0,
-            12.0
-          ]
-        ]
-      }
-    },
-    "ty": "CFrame"
-  },
-  "Color3": {
-    "value": {
-      "Color3": [
-        1.0,
-        2.0,
-        3.0
-      ]
-    },
-    "ty": "Color3"
-  },
-  "Color3uint8": {
-    "value": {
-      "Color3uint8": [
-        0,
-        128,
-        255
-      ]
-    },
-    "ty": "Color3uint8"
-  },
-  "ColorSequence": {
-    "value": {
-      "ColorSequence": {
-        "keypoints": [
-          {
-            "time": 0.0,
-            "color": [
-              1.0,
-              1.0,
-              0.5
-            ]
-          },
-          {
-            "time": 1.0,
-            "color": [
-              0.0,
-              0.0,
-              0.0
-            ]
-          }
-        ]
-      }
-    },
-    "ty": "ColorSequence"
-  },
-  "Content": {
-    "value": {
-      "Content": "rbxassetid://12345"
-    },
-    "ty": "Content"
-  },
-  "Enum": {
-    "value": {
-      "Enum": 1234
-    },
-    "ty": "Enum"
-  },
-  "Faces": {
-    "value": {
-      "Faces": [
-        "Right",
-        "Top",
-        "Back",
-        "Left",
-        "Bottom",
-        "Front"
-      ]
-    },
-    "ty": "Faces"
-  },
-  "Float32": {
-    "value": {
-      "Float32": 15.0
-    },
-    "ty": "Float32"
-  },
-  "Float64": {
-    "value": {
-      "Float64": 15123.0
-    },
-    "ty": "Float64"
-  },
-  "Int32": {
-    "value": {
-      "Int32": 6014
-    },
-    "ty": "Int32"
-  },
-  "Int64": {
-    "value": {
-      "Int64": 23491023
-    },
-    "ty": "Int64"
-  },
-  "NumberRange": {
-    "value": {
-      "NumberRange": [
-        -36.0,
-        94.0
-      ]
-    },
-    "ty": "NumberRange"
-  },
-  "NumberSequence": {
-    "value": {
-      "NumberSequence": {
-        "keypoints": [
-          {
-            "time": 0.0,
-            "value": 5.0,
-            "envelope": 2.0
-          },
-          {
-            "time": 1.0,
-            "value": 22.0,
-            "envelope": 0.0
-          }
-        ]
-      }
-    },
-    "ty": "NumberSequence"
-  },
-  "PhysicalProperties-Custom": {
-    "value": {
-      "PhysicalProperties": {
-        "density": 0.5,
-        "friction": 1.0,
-        "elasticity": 0.0,
-        "frictionWeight": 50.0,
-        "elasticityWeight": 25.0
-      }
-    },
-    "ty": "PhysicalProperties"
-  },
-  "PhysicalProperties-Default": {
-    "value": {
-      "PhysicalProperties": "Default"
-    },
-    "ty": "PhysicalProperties"
-  },
-  "Ray": {
-    "value": {
-      "Ray": {
-        "origin": [
-          1.0,
-          2.0,
-          3.0
-        ],
-        "direction": [
-          4.0,
-          5.0,
-          6.0
-        ]
-      }
-    },
-    "ty": "Ray"
-  },
-  "Rect": {
-    "value": {
-      "Rect": [
-        [
-          0.0,
-          5.0
-        ],
-        [
-          10.0,
-          15.0
-        ]
-      ]
-    },
-    "ty": "Rect"
-  },
-  "Region3int16": {
-    "value": {
-      "Region3int16": [
-        [
-          -10,
-          -5,
-          0
-        ],
-        [
-          5,
-          10,
-          15
-        ]
-      ]
-    },
-    "ty": "Region3int16"
-  },
-  "String": {
-    "value": {
-      "String": "Hello, world!"
-    },
-    "ty": "String"
-  },
-  "UDim": {
-    "value": {
-      "UDim": [
-        1.0,
-        32
-      ]
-    },
-    "ty": "UDim"
-  },
-  "UDim2": {
-    "value": {
-      "UDim2": [
-        [
-          -1.0,
-          100
-        ],
-        [
-          1.0,
-          -100
-        ]
-      ]
-    },
-    "ty": "UDim2"
-  },
-  "Vector2": {
-    "value": {
-      "Vector2": [
-        -50.0,
-        50.0
-      ]
-    },
-    "ty": "Vector2"
-  },
-  "Vector2int16": {
-    "value": {
-      "Vector2int16": [
-        -300,
-        300
-      ]
-    },
-    "ty": "Vector2int16"
-  },
-  "Vector3": {
-    "value": {
-      "Vector3": [
-        -300.0,
-        0.0,
-        1500.0
-      ]
-    },
-    "ty": "Vector3"
-  },
-  "Vector3int16": {
-    "value": {
-      "Vector3int16": [
-        60,
-        37,
-        -450
-      ]
-    },
-    "ty": "Vector3int16"
-  }
-}

plugin/rbx_dom_lua/default.project.json

@@ -1,5 +1,5 @@
 {
-  "name": "empty_folder",
+  "name": "rbx_dom_lua",
   "tree": {
     "$path": "src"
   }

plugin/rbx_dom_lua/src/EncodedValue.lua

@@ -0,0 +1,242 @@
+local base64 = require(script.Parent.base64)
+
+local function identity(...)
+	return ...
+end
+
+local function unpackDecoder(f)
+	return function(value)
+		return f(unpack(value))
+	end
+end
+
+local function serializeFloat(value)
+	-- TODO: Figure out a better way to serialize infinity and NaN, neither of
+	-- which fit into JSON.
+	if value == math.huge or value == -math.huge then
+		return 999999999 * math.sign(value)
+	end
+
+	return value
+end
+
+local encoders
+encoders = {
+	Bool = identity,
+	Content = identity,
+	Float32 = serializeFloat,
+	Float64 = serializeFloat,
+	Int32 = identity,
+	Int64 = identity,
+	String = identity,
+
+	BinaryString = base64.encode,
+	SharedString = base64.encode,
+
+	BrickColor = function(value)
+		return value.Number
+	end,
+
+	CFrame = function(value)
+		return {value:GetComponents()}
+	end,
+	Color3 = function(value)
+		return {value.r, value.g, value.b}
+	end,
+	NumberRange = function(value)
+		return {value.Min, value.Max}
+	end,
+	NumberSequence = function(value)
+		local keypoints = {}
+
+		for index, keypoint in ipairs(value.Keypoints) do
+			keypoints[index] = {
+				Time = keypoint.Time,
+				Value = keypoint.Value,
+				Envelope = keypoint.Envelope,
+			}
+		end
+
+		return {
+			Keypoints = keypoints,
+		}
+	end,
+	ColorSequence = function(value)
+		local keypoints = {}
+
+		for index, keypoint in ipairs(value.Keypoints) do
+			keypoints[index] = {
+				Time = keypoint.Time,
+				Color = encoders.Color3(keypoint.Value),
+			}
+		end
+
+		return {
+			Keypoints = keypoints,
+		}
+	end,
+	Rect = function(value)
+		return {
+			Min = {value.Min.X, value.Min.Y},
+			Max = {value.Max.X, value.Max.Y},
+		}
+	end,
+	UDim = function(value)
+		return {value.Scale, value.Offset}
+	end,
+	UDim2 = function(value)
+		return {value.X.Scale, value.X.Offset, value.Y.Scale, value.Y.Offset}
+	end,
+	Vector2 = function(value)
+		return {
+			serializeFloat(value.X),
+			serializeFloat(value.Y),
+		}
+	end,
+	Vector2int16 = function(value)
+		return {value.X, value.Y}
+	end,
+	Vector3 = function(value)
+		return {
+			serializeFloat(value.X),
+			serializeFloat(value.Y),
+			serializeFloat(value.Z),
+		}
+	end,
+	Vector3int16 = function(value)
+		return {value.X, value.Y, value.Z}
+	end,
+
+	PhysicalProperties = function(value)
+		if value == nil then
+			return nil
+		else
+			return {
+				Density = value.Density,
+				Friction = value.Friction,
+				Elasticity = value.Elasticity,
+				FrictionWeight = value.FrictionWeight,
+				ElasticityWeight = value.ElasticityWeight,
+			}
+		end
+	end,
+
+	Ref = function(value)
+		return nil
+	end,
+}
+
+local decoders = {
+	Bool = identity,
+	Content = identity,
+	Enum = identity,
+	Float32 = identity,
+	Float64 = identity,
+	Int32 = identity,
+	Int64 = identity,
+	String = identity,
+
+	BinaryString = base64.decode,
+	SharedString = base64.decode,
+
+	BrickColor = BrickColor.new,
+
+	CFrame = unpackDecoder(CFrame.new),
+	Color3 = unpackDecoder(Color3.new),
+	Color3uint8 = unpackDecoder(Color3.fromRGB),
+	NumberRange = unpackDecoder(NumberRange.new),
+	UDim = unpackDecoder(UDim.new),
+	UDim2 = unpackDecoder(UDim2.new),
+	Vector2 = unpackDecoder(Vector2.new),
+	Vector2int16 = unpackDecoder(Vector2int16.new),
+	Vector3 = unpackDecoder(Vector3.new),
+	Vector3int16 = unpackDecoder(Vector3int16.new),
+
+	Rect = function(value)
+		return Rect.new(value.Min[1], value.Min[2], value.Max[1], value.Max[2])
+	end,
+
+	NumberSequence = function(value)
+		local keypoints = {}
+
+		for index, keypoint in ipairs(value.Keypoints) do
+			keypoints[index] = NumberSequenceKeypoint.new(
+				keypoint.Time,
+				keypoint.Value,
+				keypoint.Envelope
+			)
+		end
+
+		return NumberSequence.new(keypoints)
+	end,
+
+	ColorSequence = function(value)
+		local keypoints = {}
+
+		for index, keypoint in ipairs(value.Keypoints) do
+			keypoints[index] = ColorSequenceKeypoint.new(
+				keypoint.Time,
+				Color3.new(unpack(keypoint.Color))
+			)
+		end
+
+		return ColorSequence.new(keypoints)
+	end,
+
+	PhysicalProperties = function(properties)
+		if properties == nil then
+			return nil
+		else
+			return PhysicalProperties.new(
+				properties.Density,
+				properties.Friction,
+				properties.Elasticity,
+				properties.FrictionWeight,
+				properties.ElasticityWeight
+			)
+		end
+	end,
+
+	Ref = function()
+		return nil
+	end,
+}
+
+local EncodedValue = {}
+
+function EncodedValue.decode(encodedValue)
+	local decoder = decoders[encodedValue.Type]
+	if decoder ~= nil then
+		return true, decoder(encodedValue.Value)
+	end
+
+	return false, "Couldn't decode value " .. tostring(encodedValue.Type)
+end
+
+function EncodedValue.encode(rbxValue, propertyType)
+	assert(propertyType ~= nil, "Property type descriptor is required")
+
+	if propertyType.type == "Data" then
+		local encoder = encoders[propertyType.name]
+
+		if encoder == nil then
+			return false, ("Missing encoder for property type %q"):format(propertyType.name)
+		end
+
+		if encoder ~= nil then
+			return true, {
+				Type = propertyType.name,
+				Value = encoder(rbxValue),
+			}
+		end
+	elseif propertyType.type == "Enum" then
+		return true, {
+			Type = "Enum",
+			Value = rbxValue.Value,
+		}
+	end
+
+	return false, ("Unknown property descriptor type %q"):format(tostring(propertyType.type))
+end
+
+return EncodedValue

plugin/rbx_dom_lua/src/EncodedValue.spec.lua

@@ -0,0 +1,127 @@
+return function()
+	local RbxDom = require(script.Parent)
+	local EncodedValue = require(script.Parent.EncodedValue)
+
+	it("should decode Rect values", function()
+		local input = {
+			Type = "Rect",
+			Value = {
+				Min = {1, 2},
+				Max = {3, 4},
+			},
+		}
+
+		local output = Rect.new(1, 2, 3, 4)
+
+		local ok, decoded = EncodedValue.decode(input)
+
+		assert(ok, decoded)
+		expect(decoded).to.equal(output)
+	end)
+
+	it("should decode ColorSequence values", function()
+		local input = {
+			Type = "ColorSequence",
+			Value = {
+				Keypoints = {
+					{
+						Time = 0,
+						Color = { 0.12, 0.34, 0.56 },
+					},
+
+					{
+						Time = 1,
+						Color = { 0.13, 0.33, 0.37 },
+					},
+				}
+			},
+		}
+
+		local output = ColorSequence.new({
+			ColorSequenceKeypoint.new(0, Color3.new(0.12, 0.34, 0.56)),
+			ColorSequenceKeypoint.new(1, Color3.new(0.13, 0.33, 0.37)),
+		})
+
+		local ok, decoded = EncodedValue.decode(input)
+		assert(ok, decoded)
+		expect(decoded).to.equal(output)
+	end)
+
+	it("should decode NumberSequence values", function()
+		local input = {
+			Type = "NumberSequence",
+			Value = {
+				Keypoints = {
+					{
+						Time = 0,
+						Value = 0.5,
+						Envelope = 0,
+					},
+
+					{
+						Time = 1,
+						Value = 0.5,
+						Envelope = 0,
+					},
+				}
+			},
+		}
+
+		local output = NumberSequence.new({
+			NumberSequenceKeypoint.new(0, 0.5, 0),
+			NumberSequenceKeypoint.new(1, 0.5, 0),
+		})
+
+		local ok, decoded = EncodedValue.decode(input)
+		assert(ok, decoded)
+		expect(decoded).to.equal(output)
+	end)
+
+	it("should decode PhysicalProperties values", function()
+		local input = {
+			Type = "PhysicalProperties",
+			Value = {
+				Density = 0.1,
+				Friction = 0.2,
+				Elasticity = 0.3,
+				FrictionWeight = 0.4,
+				ElasticityWeight = 0.5,
+			},
+		}
+
+		local output = PhysicalProperties.new(
+			0.1,
+			0.2,
+			0.3,
+			0.4,
+			0.5
+		)
+
+		local ok, decoded = EncodedValue.decode(input)
+		assert(ok, decoded)
+		expect(decoded).to.equal(output)
+	end)
+
+	-- This part of rbx_dom_lua needs some work still.
+	itSKIP("should encode Rect values", function()
+		local input = Rect.new(10, 20, 30, 40)
+
+		local output = {
+			Type = "Rect",
+			Value = {
+				Min = {10, 20},
+				Max = {30, 40},
+			},
+		}
+
+		local descriptor = RbxDom.findCanonicalPropertyDescriptor("ImageLabel", "SliceCenter")
+		local ok, encoded = EncodedValue.encode(input, descriptor)
+
+		assert(ok, encoded)
+		expect(encoded.Type).to.equal(output.Type)
+		expect(encoded.Value.Min[1]).to.equal(output.Value.Min[1])
+		expect(encoded.Value.Min[2]).to.equal(output.Value.Min[2])
+		expect(encoded.Value.Max[1]).to.equal(output.Value.Max[1])
+		expect(encoded.Value.Max[2]).to.equal(output.Value.Max[2])
+	end)
+end

plugin/rbx_dom_lua/src/PropertyDescriptor.lua

@@ -21,7 +21,7 @@ end
 
 function PropertyDescriptor.fromRaw(data, className, propertyName)
 	return setmetatable({
-		scriptability = data.Scriptability,
+		scriptability = data.scriptability,
 		className = className,
 		name = propertyName,
 	}, PropertyDescriptor)

plugin/rbx_dom_lua/src/ReflectionDatabase/init.lua

@@ -0,0 +1,3 @@
+return {
+	classes = require(script.classes)
+}

plugin/rbx_dom_lua/src/init.lua

@@ -1,4 +1,4 @@
-local database = require(script.database)
+local ReflectionDatabase = require(script.ReflectionDatabase)
 local Error = require(script.Error)
 local PropertyDescriptor = require(script.PropertyDescriptor)
 
@@ -6,31 +6,29 @@ local function findCanonicalPropertyDescriptor(className, propertyName)
 	local currentClassName = className
 
 	repeat
-		local currentClass = database.Classes[currentClassName]
+		local currentClass = ReflectionDatabase.classes[currentClassName]
 
 		if currentClass == nil then
 			return currentClass
 		end
 
-		local propertyData = currentClass.Properties[propertyName]
+		local propertyData = currentClass.properties[propertyName]
 		if propertyData ~= nil then
-			local canonicalData = propertyData.Kind.Canonical
+			if propertyData.isCanonical then
-			if canonicalData ~= nil then
 				return PropertyDescriptor.fromRaw(propertyData, currentClassName, propertyName)
 			end
 
-			local aliasData = propertyData.Kind.Alias
+			if propertyData.canonicalName ~= nil then
-			if aliasData ~= nil then
 				return PropertyDescriptor.fromRaw(
-					currentClass.Properties[aliasData.AliasFor],
+					currentClass.properties[propertyData.canonicalName],
 					currentClassName,
-					aliasData.AliasFor)
+					propertyData.canonicalName)
 			end
 
 			return nil
 		end
 
-		currentClassName = currentClass.Superclass
+		currentClassName = currentClass.superclass
 	until currentClassName == nil
 
 	return nil
@@ -66,4 +64,4 @@ return {
 	findCanonicalPropertyDescriptor = findCanonicalPropertyDescriptor,
 	Error = Error,
 	EncodedValue = require(script.EncodedValue),
-}
+}

plugin/rbx_dom_lua/test-place.project.json

@@ -0,0 +1,35 @@
+{
+  "name": "rbx_dom_lua test place",
+  "tree": {
+    "$className": "DataModel",
+    "ReplicatedStorage": {
+      "$className": "ReplicatedStorage",
+
+      "RbxDom": {
+        "$path": "src"
+      },
+      "TestEZ": {
+        "$path": "modules/testez/lib"
+      }
+    },
+    "ServerScriptService": {
+      "$className": "ServerScriptService",
+
+      "Run Tests": {
+        "$path": "test.server.lua"
+      }
+    },
+    "Players": {
+      "$className": "Players",
+      "$properties": {
+        "CharacterAutoLoads": false
+      }
+    },
+    "HttpService": {
+      "$className": "HttpService",
+      "$properties": {
+        "HttpEnabled": true
+      }
+    }
+  }
+}

plugin/rbx_dom_lua/test.server.lua

@@ -0,0 +1,7 @@
+local ReplicatedStorage = game:GetService("ReplicatedStorage")
+
+local LIB_ROOT = ReplicatedStorage.RbxDom
+
+local TestEZ = require(ReplicatedStorage.TestEZ)
+
+TestEZ.TestBootstrap:run({LIB_ROOT})

plugin/src/Config.lua

@@ -5,9 +5,9 @@ local isDevBuild = script.Parent.Parent:FindFirstChild("ROJO_DEV_BUILD") ~= nil
 return strict("Config", {
 	isDevBuild = isDevBuild,
 	codename = "Epiphany",
-	version = {7, 0, 0, "-rc.1"},
+	version = {6, 2, 0},
-	expectedServerVersionString = "7.0 or newer",
+	expectedServerVersionString = "6.0 or newer",
-	protocolVersion = 4,
+	protocolVersion = 3,
 	defaultHost = "localhost",
 	defaultPort = 34872,
 })

plugin/src/Reconciler/applyPatch.spec.lua

@@ -146,7 +146,8 @@ return function()
 			id = "VALUE",
 			changedProperties = {
 				Value = {
-					String = "WORLD",
+					Type = "String",
+					Value = "WORLD",
 				},
 			},
 		})
@@ -175,7 +176,8 @@ return function()
 			changedClassName = "StringValue",
 			changedProperties = {
 				Value = {
-					String = "I am Root",
+					Type = "String",
+					Value = "I am Root",
 				},
 			},
 		})

plugin/src/Reconciler/decodeValue.lua

@@ -6,31 +6,29 @@
 local RbxDom = require(script.Parent.Parent.Parent.RbxDom)
 local Error = require(script.Parent.Error)
 
-local function decodeValue(encodedValue, instanceMap)
+local function decodeValue(virtualValue, instanceMap)
-	local ty, value = next(encodedValue)
-
 	-- Refs are represented as IDs in the same space that Rojo's protocol uses.
-	if ty == "Ref" then
+	if virtualValue.Type == "Ref" then
-		if value == "00000000000000000000000000000000" then
+		if virtualValue.Value == nil then
 			return true, nil
 		end
 
-		local instance = instanceMap.fromIds[value]
+		local instance = instanceMap.fromIds[virtualValue.Value]
 
 		if instance ~= nil then
 			return true, instance
 		else
 			return false, Error.new(Error.RefDidNotExist, {
-				encodedValue = encodedValue,
+				virtualValue = virtualValue,
 			})
 		end
 	end
 
-	local ok, decodedValue = RbxDom.EncodedValue.decode(encodedValue)
+	local ok, decodedValue = RbxDom.EncodedValue.decode(virtualValue)
 
 	if not ok then
 		return false, Error.new(Error.CannotDecodeValue, {
-			encodedValue = encodedValue,
+			virtualValue = virtualValue,
 			innerError = decodedValue,
 		})
 	end

plugin/src/Reconciler/diff.lua

@@ -75,9 +75,7 @@ local function diff(instanceMap, virtualInstances, rootId)
 						changedProperties[propertyName] = virtualValue
 					end
 				else
-					-- virtualValue can be empty in certain cases, and this may print out nil to the user.
+					Log.warn("Failed to decode property of type {}", virtualValue.Type)
-					local propertyType = next(virtualValue)
-					Log.warn("Failed to decode property of type {}", propertyType)
 				end
 			else
 				local err = existingValueOrErr

plugin/src/Reconciler/diff.spec.lua

@@ -80,7 +80,8 @@ return function()
 				Name = "Value",
 				Properties = {
 					Value = {
-						String = "Hello, world!",
+						Type = "String",
+						Value = "Hello, world!",
 					},
 				},
 				Children = {},
@@ -106,9 +107,8 @@ return function()
 
 		local patchProperty = update.changedProperties["Value"]
 		expect(patchProperty).to.be.a("table")
-		local ty, value = next(patchProperty)
+		expect(patchProperty.Type).to.equal("String")
-		expect(ty).to.equal("String")
+		expect(patchProperty.Value).to.equal("Hello, world!")
-		expect(value).to.equal("Hello, world!")
 	end)
 
 	it("should generate an empty patch if no properties changed", function()
@@ -119,7 +119,8 @@ return function()
 				Name = "Value",
 				Properties = {
 					Value = {
-						String = "Hello, world!",
+						Type = "String",
+						Value = "Hello, world!",
 					},
 				},
 				Children = {},
@@ -144,7 +145,8 @@ return function()
 				Name = "Folder",
 				Properties = {
 					FAKE_PROPERTY = {
-						String = "Hello, world!",
+						Type = "String",
+						Value = "Hello, world!",
 					},
 				},
 				Children = {},
@@ -181,7 +183,8 @@ return function()
 					-- heat_xml is a serialization-only property that is not
 					-- exposed to Lua.
 					heat_xml = {
-						Float32 = 5,
+						Type = "Float32",
+						Value = 5,
 					},
 				},
 				Children = {},

plugin/src/Reconciler/reify.lua

@@ -70,7 +70,7 @@ function reifyInner(instanceMap, virtualInstances, id, parentInstance, unapplied
 	for propertyName, virtualValue in pairs(virtualInstance.Properties) do
 		-- Because refs may refer to instances that we haven't constructed yet,
 		-- we defer applying any ref properties until all instances are created.
-		if next(virtualValue) == "Ref" then
+		if virtualValue.Type == "Ref" then
 			table.insert(deferredRefs, {
 				id = id,
 				instance = instance,
@@ -136,23 +136,23 @@ function applyDeferredRefs(instanceMap, deferredRefs, unappliedPatch)
 	end
 
 	for _, entry in ipairs(deferredRefs) do
-		local _, refId = next(entry.virtualValue)
+		local virtualValue = entry.virtualValue
 
-		if refId == nil then
+		if virtualValue.Value == nil then
 			continue
 		end
 
-		local targetInstance = instanceMap.fromIds[refId]
+		local targetInstance = instanceMap.fromIds[virtualValue.Value]
 		if targetInstance == nil then
-			markFailed(entry.id, entry.propertyName, entry.virtualValue)
+			markFailed(entry.id, entry.propertyName, virtualValue)
 			continue
 		end
 
 		local ok = setProperty(entry.instance, entry.propertyName, targetInstance)
 		if not ok then
-			markFailed(entry.id, entry.propertyName, entry.virtualValue)
+			markFailed(entry.id, entry.propertyName, virtualValue)
 		end
 	end
 end
 
-return reify
+return reify

plugin/src/Reconciler/reify.spec.lua

@@ -54,7 +54,8 @@ return function()
 				Name = "Spaghetti",
 				Properties = {
 					Value = {
-						String = "Hello, world!",
+						Type = "String",
+						Value = "Hello, world!",
 					},
 				},
 				Children = {},
@@ -190,7 +191,8 @@ return function()
 				Name = "Child",
 				Properties = {
 					Value = {
-						Ref = "ROOT",
+						Type = "Ref",
+						Value = "ROOT",
 					},
 				},
 				Children = {},
@@ -217,7 +219,8 @@ return function()
 				Name = "Root",
 				Properties = {
 					Value = {
-						Ref = "EXISTING",
+						Type = "Ref",
+						Value = "EXISTING",
 					},
 				},
 				Children = {},
@@ -255,7 +258,8 @@ return function()
 				Name = "Child A",
 				Properties = {
 					Value = {
-						Ref = "Child B",
+						Type = "Ref",
+						Value = "Child B",
 					},
 				},
 				Children = {},
@@ -294,7 +298,8 @@ return function()
 				Name = "Root",
 				Properties = {
 					Value = {
-						Ref = "CHILD",
+						Type = "Ref",
+						Value = "CHILD",
 					},
 				},
 				Children = {"CHILD"},

plugin/src/ServeSession.lua

@@ -112,7 +112,6 @@ function ServeSession:start()
 	self.__apiContext:connect()
 		:andThen(function(serverInfo)
 			self:__setStatus(Status.Connected, serverInfo.projectName)
-			self:__applyGameAndPlaceId(serverInfo)
 
 			local rootInstanceId = serverInfo.rootInstanceId
 
@@ -130,16 +129,6 @@ function ServeSession:stop()
 	self:__stopInternal()
 end
 
-function ServeSession:__applyGameAndPlaceId(serverInfo)
-	if serverInfo.gameId ~= nil then
-		game:SetUniverseId(serverInfo.gameId)
-	end
-
-	if serverInfo.placeId ~= nil then
-		game:SetPlaceId(serverInfo.placeId)
-	end
-end
-
 function ServeSession:__onActiveScriptChanged(activeScript)
 	if not self.__openScriptsExternally then
 		Log.trace("Not opening script {} because feature not enabled.", activeScript)

plugin/src/Types.lua

@@ -5,7 +5,10 @@ local strict = require(script.Parent.strict)
 
 local RbxId = t.string
 
-local ApiValue = t.keys(t.string)
+local ApiValue = t.interface({
+	Type = t.string,
+	Value = t.optional(t.any),
+})
 
 local ApiInstanceMetadata = t.interface({
 	ignoreUnknownInstances = t.optional(t.boolean),
@@ -93,4 +96,4 @@ return strict("Types", {
 	VirtualInstance = ApiInstance,
 	VirtualMetadata = ApiInstanceMetadata,
 	VirtualValue = ApiValue,
-})
+})

rojo-test/build-test-snapshots/end_to_end__tests__build__json_model_in_folder.snap

@@ -1,6 +1,7 @@
 ---
 source: tests/tests/build.rs
 expression: contents
+
 ---
 <roblox version="4">
   <Item class="Folder" referent="0">

rojo-test/build-test-snapshots/end_to_end__tests__build__unresolved_values.snap

@@ -1,52 +0,0 @@
----
-source: tests/tests/build.rs
-expression: contents
-
----
-<roblox version="4">
-  <Item class="DataModel" referent="0">
-    <Properties>
-      <string name="Name">unresolved-values</string>
-    </Properties>
-    <Item class="Lighting" referent="1">
-      <Properties>
-        <string name="Name">Lighting</string>
-        <Color3 name="Ambient">
-          <R>1</R>
-          <G>0</G>
-          <B>0</B>
-        </Color3>
-        <token name="Technology">1</token>
-      </Properties>
-    </Item>
-    <Item class="Workspace" referent="2">
-      <Properties>
-        <string name="Name">Workspace</string>
-      </Properties>
-      <Item class="BoolValue" referent="3">
-        <Properties>
-          <string name="Name">Bool</string>
-          <bool name="Value">true</bool>
-        </Properties>
-      </Item>
-      <Item class="Part" referent="4">
-        <Properties>
-          <string name="Name">Color</string>
-          <Color3uint8 name="Color3uint8">8404992</Color3uint8>
-        </Properties>
-      </Item>
-      <Item class="NumberValue" referent="5">
-        <Properties>
-          <string name="Name">Float</string>
-          <double name="Value">123.5</double>
-        </Properties>
-      </Item>
-      <Item class="IntValue" referent="6">
-        <Properties>
-          <string name="Name">Int</string>
-          <int64 name="Value">65</int64>
-        </Properties>
-      </Item>
-    </Item>
-  </Item>
-</roblox>

rojo-test/build-tests/unresolved_values/default.project.json

@@ -1,43 +0,0 @@
-{
-  "name": "unresolved-values",
-  "tree": {
-    "$className": "DataModel",
-
-    "Lighting": {
-      "$properties": {
-        "Technology": "Voxel",
-        "Ambient": [1, 0, 0]
-      }
-    },
-
-    "Workspace": {
-      "Color": {
-        "$className": "Part",
-        "$properties": {
-          "Color": [0.5, 0.25, 0]
-        }
-      },
-
-      "Bool": {
-        "$className": "BoolValue",
-        "$properties": {
-          "Value": true
-        }
-      },
-
-      "Int": {
-        "$className": "IntValue",
-        "$properties": {
-          "Value": 65
-        }
-      },
-
-      "Float": {
-        "$className": "NumberValue",
-        "$properties": {
-          "Value": 123.5
-        }
-      }
-    }
-  }
-}

rojo-test/serve-test-snapshots/end_to_end__tests__serve__add_folder_all-2.snap

@@ -11,7 +11,7 @@ instances:
     Metadata:
       ignoreUnknownInstances: false
     Name: add_folder
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties: {}
   id-3:
     Children: []

rojo-test/serve-test-snapshots/end_to_end__tests__serve__add_folder_all.snap

@@ -10,7 +10,7 @@ instances:
     Metadata:
       ignoreUnknownInstances: false
     Name: add_folder
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties: {}
 messageCursor: 0
 sessionId: id-1

rojo-test/serve-test-snapshots/end_to_end__tests__serve__add_folder_info.snap

@@ -1,14 +1,10 @@
 ---
 source: tests/tests/serve.rs
 expression: redactions.redacted_yaml(info)
-
 ---
 expectedPlaceIds: ~
-gameId: ~
-placeId: ~
 projectName: add_folder
-protocolVersion: 4
+protocolVersion: 3
 rootInstanceId: id-2
 serverVersion: "[server-version]"
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__edit_init_all-2.snap

@@ -1,7 +1,6 @@
 ---
 source: tests/tests/serve.rs
 expression: "read_response.intern_and_redact(&mut redactions, root_id)"
-
 ---
 instances:
   id-2:
@@ -11,10 +10,10 @@ instances:
     Metadata:
       ignoreUnknownInstances: false
     Name: edit_init
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties:
       Source:
-        String: "-- Edited contents"
+        Type: String
+        Value: "-- Edited contents"
 messageCursor: 1
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__edit_init_all.snap

@@ -1,7 +1,6 @@
 ---
 source: tests/tests/serve.rs
 expression: "read_response.intern_and_redact(&mut redactions, root_id)"
-
 ---
 instances:
   id-2:
@@ -11,10 +10,10 @@ instances:
     Metadata:
       ignoreUnknownInstances: false
     Name: edit_init
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties:
       Source:
-        String: "-- Original contents"
+        Type: String
+        Value: "-- Original contents"
 messageCursor: 0
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__edit_init_info.snap

@@ -1,14 +1,10 @@
 ---
 source: tests/tests/serve.rs
 expression: redactions.redacted_yaml(info)
-
 ---
 expectedPlaceIds: ~
-gameId: ~
-placeId: ~
 projectName: edit_init
-protocolVersion: 4
+protocolVersion: 3
 rootInstanceId: id-2
 serverVersion: "[server-version]"
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__edit_init_subscribe.snap

@@ -1,7 +1,6 @@
 ---
 source: tests/tests/serve.rs
 expression: "subscribe_response.intern_and_redact(&mut redactions, ())"
-
 ---
 messageCursor: 1
 messages:
@@ -13,7 +12,7 @@ messages:
         changedName: ~
         changedProperties:
           Source:
-            String: "-- Edited contents"
+            Type: String
+            Value: "-- Edited contents"
         id: id-2
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__empty_all.snap

@@ -10,7 +10,7 @@ instances:
     Metadata:
       ignoreUnknownInstances: true
     Name: empty
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties: {}
 messageCursor: 0
 sessionId: id-1

rojo-test/serve-test-snapshots/end_to_end__tests__serve__empty_info.snap

@@ -1,14 +1,10 @@
 ---
 source: tests/tests/serve.rs
 expression: redactions.redacted_yaml(info)
-
 ---
 expectedPlaceIds: ~
-gameId: ~
-placeId: ~
 projectName: empty
-protocolVersion: 4
+protocolVersion: 3
 rootInstanceId: id-2
 serverVersion: "[server-version]"
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__empty_json_model_all-2.snap

@@ -1,28 +0,0 @@
----
-source: tests/tests/serve.rs
-expression: "read_response.intern_and_redact(&mut redactions, root_id)"
-
----
-instances:
-  id-2:
-    Children:
-      - id-3
-    ClassName: Folder
-    Id: id-2
-    Metadata:
-      ignoreUnknownInstances: false
-    Name: empty_folder
-    Parent: "00000000000000000000000000000000"
-    Properties: {}
-  id-3:
-    Children: []
-    ClassName: Model
-    Id: id-3
-    Metadata:
-      ignoreUnknownInstances: false
-    Name: test
-    Parent: id-2
-    Properties: {}
-messageCursor: 1
-sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__empty_json_model_all.snap

@@ -1,18 +0,0 @@
----
-source: tests/tests/serve.rs
-expression: "read_response.intern_and_redact(&mut redactions, root_id)"
-
----
-instances:
-  id-2:
-    Children: []
-    ClassName: Folder
-    Id: id-2
-    Metadata:
-      ignoreUnknownInstances: false
-    Name: empty_folder
-    Parent: "00000000000000000000000000000000"
-    Properties: {}
-messageCursor: 0
-sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__empty_json_model_info.snap

@@ -1,14 +0,0 @@
----
-source: tests/tests/serve.rs
-expression: redactions.redacted_yaml(info)
-
----
-expectedPlaceIds: ~
-gameId: ~
-placeId: ~
-projectName: empty_folder
-protocolVersion: 4
-rootInstanceId: id-2
-serverVersion: "[server-version]"
-sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__empty_json_model_subscribe.snap

@@ -1,21 +0,0 @@
----
-source: tests/tests/serve.rs
-expression: "subscribe_response.intern_and_redact(&mut redactions, ())"
-
----
-messageCursor: 1
-messages:
-  - added:
-      id-3:
-        Children: []
-        ClassName: Model
-        Id: id-3
-        Metadata:
-          ignoreUnknownInstances: false
-        Name: test
-        Parent: id-2
-        Properties: {}
-    removed: []
-    updated: []
-sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__move_folder_of_stuff_all-2.snap

@@ -1,7 +1,6 @@
 ---
 source: tests/tests/serve.rs
 expression: "read_response.intern_and_redact(&mut redactions, root_id)"
-
 ---
 instances:
   id-10:
@@ -14,7 +13,8 @@ instances:
     Parent: id-3
     Properties:
       Value:
-        String: "File #6"
+        Type: String
+        Value: "File #6"
   id-11:
     Children: []
     ClassName: StringValue
@@ -25,7 +25,8 @@ instances:
     Parent: id-3
     Properties:
       Value:
-        String: "File #7"
+        Type: String
+        Value: "File #7"
   id-12:
     Children: []
     ClassName: StringValue
@@ -36,7 +37,8 @@ instances:
     Parent: id-3
     Properties:
       Value:
-        String: "File #8"
+        Type: String
+        Value: "File #8"
   id-13:
     Children: []
     ClassName: StringValue
@@ -47,7 +49,8 @@ instances:
     Parent: id-3
     Properties:
       Value:
-        String: "File #9"
+        Type: String
+        Value: "File #9"
   id-2:
     Children:
       - id-3
@@ -56,7 +59,7 @@ instances:
     Metadata:
       ignoreUnknownInstances: false
     Name: move_folder_of_stuff
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties: {}
   id-3:
     Children:
@@ -87,7 +90,8 @@ instances:
     Parent: id-3
     Properties:
       Value:
-        String: "File #0"
+        Type: String
+        Value: "File #0"
   id-5:
     Children: []
     ClassName: StringValue
@@ -98,7 +102,8 @@ instances:
     Parent: id-3
     Properties:
       Value:
-        String: "File #1"
+        Type: String
+        Value: "File #1"
   id-6:
     Children: []
     ClassName: StringValue
@@ -109,7 +114,8 @@ instances:
     Parent: id-3
     Properties:
       Value:
-        String: "File #2"
+        Type: String
+        Value: "File #2"
   id-7:
     Children: []
     ClassName: StringValue
@@ -120,7 +126,8 @@ instances:
     Parent: id-3
     Properties:
       Value:
-        String: "File #3"
+        Type: String
+        Value: "File #3"
   id-8:
     Children: []
     ClassName: StringValue
@@ -131,7 +138,8 @@ instances:
     Parent: id-3
     Properties:
       Value:
-        String: "File #4"
+        Type: String
+        Value: "File #4"
   id-9:
     Children: []
     ClassName: StringValue
@@ -142,7 +150,7 @@ instances:
     Parent: id-3
     Properties:
       Value:
-        String: "File #5"
+        Type: String
+        Value: "File #5"
 messageCursor: 1
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__move_folder_of_stuff_all.snap

@@ -10,7 +10,7 @@ instances:
     Metadata:
       ignoreUnknownInstances: false
     Name: move_folder_of_stuff
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties: {}
 messageCursor: 0
 sessionId: id-1

rojo-test/serve-test-snapshots/end_to_end__tests__serve__move_folder_of_stuff_info.snap

@@ -1,14 +1,10 @@
 ---
 source: tests/tests/serve.rs
 expression: redactions.redacted_yaml(info)
-
 ---
 expectedPlaceIds: ~
-gameId: ~
-placeId: ~
 projectName: move_folder_of_stuff
-protocolVersion: 4
+protocolVersion: 3
 rootInstanceId: id-2
 serverVersion: "[server-version]"
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__move_folder_of_stuff_subscribe.snap

@@ -1,7 +1,6 @@
 ---
 source: tests/tests/serve.rs
 expression: "subscribe_response.intern_and_redact(&mut redactions, ())"
-
 ---
 messageCursor: 1
 messages:
@@ -16,7 +15,8 @@ messages:
         Parent: id-3
         Properties:
           Value:
-            String: "File #6"
+            Type: String
+            Value: "File #6"
       id-11:
         Children: []
         ClassName: StringValue
@@ -27,7 +27,8 @@ messages:
         Parent: id-3
         Properties:
           Value:
-            String: "File #7"
+            Type: String
+            Value: "File #7"
       id-12:
         Children: []
         ClassName: StringValue
@@ -38,7 +39,8 @@ messages:
         Parent: id-3
         Properties:
           Value:
-            String: "File #8"
+            Type: String
+            Value: "File #8"
       id-13:
         Children: []
         ClassName: StringValue
@@ -49,7 +51,8 @@ messages:
         Parent: id-3
         Properties:
           Value:
-            String: "File #9"
+            Type: String
+            Value: "File #9"
       id-3:
         Children:
           - id-4
@@ -79,7 +82,8 @@ messages:
         Parent: id-3
         Properties:
           Value:
-            String: "File #0"
+            Type: String
+            Value: "File #0"
       id-5:
         Children: []
         ClassName: StringValue
@@ -90,7 +94,8 @@ messages:
         Parent: id-3
         Properties:
           Value:
-            String: "File #1"
+            Type: String
+            Value: "File #1"
       id-6:
         Children: []
         ClassName: StringValue
@@ -101,7 +106,8 @@ messages:
         Parent: id-3
         Properties:
           Value:
-            String: "File #2"
+            Type: String
+            Value: "File #2"
       id-7:
         Children: []
         ClassName: StringValue
@@ -112,7 +118,8 @@ messages:
         Parent: id-3
         Properties:
           Value:
-            String: "File #3"
+            Type: String
+            Value: "File #3"
       id-8:
         Children: []
         ClassName: StringValue
@@ -123,7 +130,8 @@ messages:
         Parent: id-3
         Properties:
           Value:
-            String: "File #4"
+            Type: String
+            Value: "File #4"
       id-9:
         Children: []
         ClassName: StringValue
@@ -134,8 +142,8 @@ messages:
         Parent: id-3
         Properties:
           Value:
-            String: "File #5"
+            Type: String
+            Value: "File #5"
     removed: []
     updated: []
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__remove_file_all-2.snap

@@ -10,7 +10,7 @@ instances:
     Metadata:
       ignoreUnknownInstances: false
     Name: remove_file
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties: {}
 messageCursor: 1
 sessionId: id-1

rojo-test/serve-test-snapshots/end_to_end__tests__serve__remove_file_all.snap

@@ -1,7 +1,6 @@
 ---
 source: tests/tests/serve.rs
 expression: "read_response.intern_and_redact(&mut redactions, root_id)"
-
 ---
 instances:
   id-2:
@@ -12,7 +11,7 @@ instances:
     Metadata:
       ignoreUnknownInstances: false
     Name: remove_file
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties: {}
   id-3:
     Children: []
@@ -24,7 +23,7 @@ instances:
     Parent: id-2
     Properties:
       Value:
-        String: This file will be removed!
+        Type: String
+        Value: This file will be removed!
 messageCursor: 0
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__remove_file_info.snap

@@ -1,14 +1,10 @@
 ---
 source: tests/tests/serve.rs
 expression: redactions.redacted_yaml(info)
-
 ---
 expectedPlaceIds: ~
-gameId: ~
-placeId: ~
 projectName: remove_file
-protocolVersion: 4
+protocolVersion: 3
 rootInstanceId: id-2
 serverVersion: "[server-version]"
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__scripts_all-2.snap

@@ -1,7 +1,6 @@
 ---
 source: tests/tests/serve.rs
 expression: "read_response.intern_and_redact(&mut redactions, root_id)"
-
 ---
 instances:
   id-2:
@@ -13,7 +12,7 @@ instances:
     Metadata:
       ignoreUnknownInstances: false
     Name: scripts
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties: {}
   id-3:
     Children: []
@@ -25,7 +24,8 @@ instances:
     Parent: id-2
     Properties:
       Source:
-        String: "-- Hello, from bar!"
+        Type: String
+        Value: "-- Hello, from bar!"
   id-4:
     Children: []
     ClassName: ModuleScript
@@ -36,7 +36,7 @@ instances:
     Parent: id-2
     Properties:
       Source:
-        String: Updated foo!
+        Type: String
+        Value: Updated foo!
 messageCursor: 1
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__scripts_all.snap

@@ -1,7 +1,6 @@
 ---
 source: tests/tests/serve.rs
 expression: "read_response.intern_and_redact(&mut redactions, root_id)"
-
 ---
 instances:
   id-2:
@@ -13,7 +12,7 @@ instances:
     Metadata:
       ignoreUnknownInstances: false
     Name: scripts
-    Parent: "00000000000000000000000000000000"
+    Parent: ~
     Properties: {}
   id-3:
     Children: []
@@ -25,7 +24,8 @@ instances:
     Parent: id-2
     Properties:
       Source:
-        String: "-- Hello, from bar!"
+        Type: String
+        Value: "-- Hello, from bar!"
   id-4:
     Children: []
     ClassName: ModuleScript
@@ -36,7 +36,7 @@ instances:
     Parent: id-2
     Properties:
       Source:
-        String: "-- Hello, from foo!"
+        Type: String
+        Value: "-- Hello, from foo!"
 messageCursor: 0
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__scripts_info.snap

@@ -1,14 +1,10 @@
 ---
 source: tests/tests/serve.rs
 expression: redactions.redacted_yaml(info)
-
 ---
 expectedPlaceIds: ~
-gameId: ~
-placeId: ~
 projectName: scripts
-protocolVersion: 4
+protocolVersion: 3
 rootInstanceId: id-2
 serverVersion: "[server-version]"
 sessionId: id-1
-

rojo-test/serve-test-snapshots/end_to_end__tests__serve__scripts_subscribe.snap

@@ -1,7 +1,6 @@
 ---
 source: tests/tests/serve.rs
 expression: "subscribe_response.intern_and_redact(&mut redactions, ())"
-
 ---
 messageCursor: 1
 messages:
@@ -13,7 +12,7 @@ messages:
         changedName: ~
         changedProperties:
           Source:
-            String: Updated foo!
+            Type: String
+            Value: Updated foo!
         id: id-4
 sessionId: id-1
-

src/bin.rs

@@ -3,7 +3,20 @@ use std::{env, panic, process};
 use backtrace::Backtrace;
 use structopt::StructOpt;
 
-use librojo::cli::Options;
+use librojo::cli::{self, GlobalOptions, Options, Subcommand};
+
+fn run(global: GlobalOptions, subcommand: Subcommand) -> anyhow::Result<()> {
+    match subcommand {
+        Subcommand::Init(init_options) => cli::init(init_options)?,
+        Subcommand::Serve(serve_options) => cli::serve(global, serve_options)?,
+        Subcommand::Build(build_options) => cli::build(build_options)?,
+        Subcommand::Upload(upload_options) => cli::upload(upload_options)?,
+        Subcommand::Doc => cli::doc()?,
+        Subcommand::Plugin(plugin_options) => cli::plugin(plugin_options)?,
+    }
+
+    Ok(())
+}
 
 fn main() {
     panic::set_hook(Box::new(|panic_info| {
@@ -68,7 +81,7 @@ fn main() {
         .write_style(options.global.color.into())
         .init();
 
-    if let Err(err) = options.run() {
+    if let Err(err) = run(options.global, options.subcommand) {
         log::error!("{:?}", err);
         process::exit(1);
     }

src/change_processor.rs

@@ -6,7 +6,7 @@ use std::{
 use crossbeam_channel::{select, Receiver, RecvError, Sender};
 use jod_thread::JoinHandle;
 use memofs::{IoResultExt, Vfs, VfsEvent};
-use rbx_dom_weak::types::{Ref, Variant};
+use rbx_dom_weak::{RbxId, RbxValue};
 
 use crate::{
     message_queue::MessageQueue,
@@ -16,9 +16,6 @@ use crate::{
     snapshot_middleware::{snapshot_from_vfs, snapshot_project_node},
 };
 
-/// Processes file change events, updates the DOM, and sends those updates
-/// through a channel for other stuff to consume.
-///
 /// Owns the connection between Rojo's VFS and its DOM by holding onto another
 /// thread that processes messages.
 ///
@@ -182,7 +179,7 @@ impl JobThreadContext {
                             InstigatingSource::Path(path) => fs::remove_file(path).unwrap(),
                             InstigatingSource::ProjectNode(_, _, _, _) => {
                                 log::warn!(
-                                    "Cannot remove instance {:?}, it's from a project file",
+                                    "Cannot remove instance {}, it's from a project file",
                                     id
                                 );
                             }
@@ -190,12 +187,12 @@ impl JobThreadContext {
                     } else {
                         // TODO
                         log::warn!(
-                            "Cannot remove instance {:?}, it is not an instigating source.",
+                            "Cannot remove instance {}, it is not an instigating source.",
                             id
                         );
                     }
                 } else {
-                    log::warn!("Cannot remove instance {:?}, it does not exist.", id);
+                    log::warn!("Cannot remove instance {}, it does not exist.", id);
                 }
             }
 
@@ -222,7 +219,7 @@ impl JobThreadContext {
                             {
                                 match instigating_source {
                                     InstigatingSource::Path(path) => {
-                                        if let Some(Variant::String(value)) = changed_value {
+                                        if let Some(RbxValue::String { value }) = changed_value {
                                             fs::write(path, value).unwrap();
                                         } else {
                                             log::warn!("Cannot change Source to non-string value.");
@@ -230,14 +227,14 @@ impl JobThreadContext {
                                     }
                                     InstigatingSource::ProjectNode(_, _, _, _) => {
                                         log::warn!(
-                                            "Cannot remove instance {:?}, it's from a project file",
+                                            "Cannot remove instance {}, it's from a project file",
                                             id
                                         );
                                     }
                                 }
                             } else {
                                 log::warn!(
-                                    "Cannot update instance {:?}, it is not an instigating source.",
+                                    "Cannot update instance {}, it is not an instigating source.",
                                     id
                                 );
                             }
@@ -246,7 +243,7 @@ impl JobThreadContext {
                         }
                     }
                 } else {
-                    log::warn!("Cannot update instance {:?}, it does not exist.", id);
+                    log::warn!("Cannot update instance {}, it does not exist.", id);
                 }
             }
 
@@ -257,7 +254,7 @@ impl JobThreadContext {
     }
 }
 
-fn compute_and_apply_changes(tree: &mut RojoTree, vfs: &Vfs, id: Ref) -> Option<AppliedPatchSet> {
+fn compute_and_apply_changes(tree: &mut RojoTree, vfs: &Vfs, id: RbxId) -> Option<AppliedPatchSet> {
     let metadata = tree
         .get_metadata(id)
         .expect("metadata missing for instance present in tree");
@@ -266,7 +263,7 @@ fn compute_and_apply_changes(tree: &mut RojoTree, vfs: &Vfs, id: Ref) -> Option<
         Some(path) => path,
         None => {
             log::error!(
-                "Instance {:?} did not have an instigating source, but was considered for an update.",
+                "Instance {} did not have an instigating source, but was considered for an update.",
                 id
             );
             log::error!("This is a bug. Please file an issue!");

src/cli/build.rs

@@ -1,88 +1,24 @@
 use std::{
+    fs::File,
     io::{BufWriter, Write},
-    path::{Path, PathBuf},
 };
 
-use anyhow::Context;
-use fs_err::File;
 use memofs::Vfs;
-use structopt::StructOpt;
+use thiserror::Error;
 use tokio::runtime::Runtime;
 
-use crate::serve_session::ServeSession;
+use crate::{cli::BuildCommand, serve_session::ServeSession, snapshot::RojoTree};
 
-use super::resolve_path;
-
-const UNKNOWN_OUTPUT_KIND_ERR: &str = "Could not detect what kind of file to build. \
-                                       Expected output file to end in .rbxl, .rbxlx, .rbxm, or .rbxmx.";
-
-/// Generates a model or place file from the Rojo project.
-#[derive(Debug, StructOpt)]
-pub struct BuildCommand {
-    /// Path to the project to serve. Defaults to the current directory.
-    #[structopt(default_value = "")]
-    pub project: PathBuf,
-
-    /// Where to output the result.
-    ///
-    /// Should end in .rbxm, .rbxl, .rbxmx, or .rbxlx.
-    #[structopt(long, short)]
-    pub output: PathBuf,
-
-    /// Whether to automatically rebuild when any input files change.
-    #[structopt(long)]
-    pub watch: bool,
-}
-
-impl BuildCommand {
-    pub fn run(self) -> anyhow::Result<()> {
-        let project_path = resolve_path(&self.project);
-
-        let output_kind = detect_output_kind(&self.output).context(UNKNOWN_OUTPUT_KIND_ERR)?;
-
-        log::trace!("Constructing in-memory filesystem");
-        let vfs = Vfs::new_default();
-        vfs.set_watch_enabled(self.watch);
-
-        let session = ServeSession::new(vfs, &project_path)?;
-        let mut cursor = session.message_queue().cursor();
-
-        write_model(&session, &self.output, output_kind)?;
-
-        if self.watch {
-            let rt = Runtime::new().unwrap();
-
-            loop {
-                let receiver = session.message_queue().subscribe(cursor);
-                let (new_cursor, _patch_set) = rt.block_on(receiver).unwrap();
-                cursor = new_cursor;
-
-                write_model(&session, &self.output, output_kind)?;
-            }
-        }
-
-        Ok(())
-    }
-}
-
-/// The different kinds of output that Rojo can build to.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 enum OutputKind {
-    /// An XML model file.
     Rbxmx,
-
-    /// An XML place file.
     Rbxlx,
-
-    /// A binary model file.
     Rbxm,
-
-    /// A binary place file.
     Rbxl,
 }
 
-fn detect_output_kind(output: &Path) -> Option<OutputKind> {
+fn detect_output_kind(options: &BuildCommand) -> Option<OutputKind> {
-    let extension = output.extension()?.to_str()?;
+    let extension = options.output.extension()?.to_str()?;
 
     match extension {
         "rbxlx" => Some(OutputKind::Rbxlx),
@@ -93,33 +29,57 @@ fn detect_output_kind(output: &Path) -> Option<OutputKind> {
     }
 }
 
+#[derive(Debug, Error)]
+enum Error {
+    #[error("Could not detect what kind of file to build. Expected output file to end in .rbxl, .rbxlx, .rbxm, or .rbxmx.")]
+    UnknownOutputKind,
+}
+
 fn xml_encode_config() -> rbx_xml::EncodeOptions {
     rbx_xml::EncodeOptions::new().property_behavior(rbx_xml::EncodePropertyBehavior::WriteUnknown)
 }
 
-fn write_model(
+pub fn build(options: BuildCommand) -> Result<(), anyhow::Error> {
-    session: &ServeSession,
+    log::trace!("Constructing in-memory filesystem");
-    output: &Path,
+
-    output_kind: OutputKind,
+    let vfs = Vfs::new_default();
-) -> anyhow::Result<()> {
+    vfs.set_watch_enabled(options.watch);
-    println!("Building project '{}'", session.project_name());
+
+    let session = ServeSession::new(vfs, &options.absolute_project())?;
+    let mut cursor = session.message_queue().cursor();
+
+    {
+        let tree = session.tree();
+        write_model(&tree, &options)?;
+    }
+
+    if options.watch {
+        let mut rt = Runtime::new().unwrap();
+
+        loop {
+            let receiver = session.message_queue().subscribe(cursor);
+            let (new_cursor, _patch_set) = rt.block_on(receiver).unwrap();
+            cursor = new_cursor;
+
+            let tree = session.tree();
+            write_model(&tree, &options)?;
+        }
+    }
+
+    Ok(())
+}
+
+fn write_model(tree: &RojoTree, options: &BuildCommand) -> Result<(), anyhow::Error> {
+    let output_kind = detect_output_kind(&options).ok_or(Error::UnknownOutputKind)?;
+    log::debug!("Hoping to generate file of type {:?}", output_kind);
 
-    let tree = session.tree();
     let root_id = tree.get_root_id();
 
     log::trace!("Opening output file for write");
-    let mut file = BufWriter::new(File::create(output)?);
+    let file = File::create(&options.output)?;
+    let mut file = BufWriter::new(file);
 
     match output_kind {
-        OutputKind::Rbxm => {
-            rbx_binary::to_writer(&mut file, tree.inner(), &[root_id])?;
-        }
-        OutputKind::Rbxl => {
-            let root_instance = tree.get_instance(root_id).unwrap();
-            let top_level_ids = root_instance.children();
-
-            rbx_binary::to_writer(&mut file, tree.inner(), top_level_ids)?;
-        }
         OutputKind::Rbxmx => {
             // Model files include the root instance of the tree and all its
             // descendants.
@@ -128,22 +88,36 @@ fn write_model(
         }
         OutputKind::Rbxlx => {
             // Place files don't contain an entry for the DataModel, but our
-            // WeakDom representation does.
+            // RbxTree representation does.
 
             let root_instance = tree.get_instance(root_id).unwrap();
             let top_level_ids = root_instance.children();
 
             rbx_xml::to_writer(&mut file, tree.inner(), top_level_ids, xml_encode_config())?;
         }
+        OutputKind::Rbxm => {
+            rbx_binary::encode(tree.inner(), &[root_id], &mut file)?;
+        }
+        OutputKind::Rbxl => {
+            log::warn!("Support for building binary places (rbxl) is still experimental.");
+            log::warn!("Using the XML place format (rbxlx) is recommended instead.");
+            log::warn!("For more info, see https://github.com/rojo-rbx/rojo/issues/180");
+
+            let root_instance = tree.get_instance(root_id).unwrap();
+            let top_level_ids = root_instance.children();
+
+            rbx_binary::encode(tree.inner(), top_level_ids, &mut file)?;
+        }
     }
 
     file.flush()?;
 
-    let filename = output
+    let filename = options
+        .output
         .file_name()
         .and_then(|name| name.to_str())
         .unwrap_or("<invalid utf-8>");
-    println!("Built project to {}", filename);
+    log::info!("Built project to {}", filename);
 
     Ok(())
 }

src/cli/doc.rs

@@ -1,12 +1,4 @@
-use structopt::StructOpt;
+pub fn doc() -> Result<(), anyhow::Error> {
-
+    opener::open("https://rojo.space/docs")?;
-/// Open Rojo's documentation in your browser.
+    Ok(())
-#[derive(Debug, StructOpt)]
-pub struct DocCommand {}
-
-impl DocCommand {
-    pub fn run(self) -> anyhow::Result<()> {
-        opener::open("https://rojo.space/docs")?;
-        Ok(())
-    }
 }

src/cli/fmt_project.rs

@@ -1,29 +0,0 @@
-use std::path::PathBuf;
-
-use anyhow::Context;
-use structopt::StructOpt;
-
-use crate::project::Project;
-
-/// Reformat a Rojo project using the standard JSON formatting rules.
-#[derive(Debug, StructOpt)]
-pub struct FmtProjectCommand {
-    /// Path to the project to format. Defaults to the current directory.
-    #[structopt(default_value = "")]
-    pub project: PathBuf,
-}
-
-impl FmtProjectCommand {
-    pub fn run(self) -> anyhow::Result<()> {
-        let project = Project::load_fuzzy(&self.project)?
-            .context("A project file is required to run 'rojo fmt-project'")?;
-
-        let serialized = serde_json::to_string_pretty(&project)
-            .context("could not re-encode project file as JSON")?;
-
-        fs_err::write(&project.file_location, &serialized)
-            .context("could not write back to project file")?;
-
-        Ok(())
-    }
-}

src/cli/init.rs

@@ -1,14 +1,13 @@
-use std::io::{self, Write};
+use std::{
-use std::path::{Path, PathBuf};
+    fs::{self, OpenOptions},
-use std::process::{Command, Stdio};
+    io::{self, Write},
-use std::str::FromStr;
+    path::Path,
+    process::{Command, Stdio},
+};
 
-use anyhow::{bail, format_err};
+use thiserror::Error;
-use fs_err as fs;
-use fs_err::OpenOptions;
-use structopt::StructOpt;
 
-use super::resolve_path;
+use crate::cli::{InitCommand, InitKind};
 
 static MODEL_PROJECT: &str =
     include_str!("../../assets/default-model-project/default.project.json");
@@ -21,71 +20,37 @@ static PLACE_PROJECT: &str =
 static PLACE_README: &str = include_str!("../../assets/default-place-project/README.md");
 static PLACE_GIT_IGNORE: &str = include_str!("../../assets/default-place-project/gitignore.txt");
 
-/// Initializes a new Rojo project.
+#[derive(Debug, Error)]
-#[derive(Debug, StructOpt)]
+enum Error {
-pub struct InitCommand {
+    #[error("A project file named default.project.json already exists in this folder")]
-    /// Path to the place to create the project. Defaults to the current directory.
+    AlreadyExists,
-    #[structopt(default_value = "")]
-    pub path: PathBuf,
 
-    /// The kind of project to create, 'place' or 'model'. Defaults to place.
+    #[error("git init failed")]
-    #[structopt(long, default_value = "place")]
+    GitInit,
-    pub kind: InitKind,
 }
 
-impl InitCommand {
+pub fn init(options: InitCommand) -> Result<(), anyhow::Error> {
-    pub fn run(self) -> anyhow::Result<()> {
+    let base_path = options.absolute_path();
-        let base_path = resolve_path(&self.path);
+    fs::create_dir_all(&base_path)?;
-        fs::create_dir_all(&base_path)?;
 
-        let canonical = fs::canonicalize(&base_path)?;
+    let canonical = fs::canonicalize(&base_path)?;
-        let project_name = canonical
+    let project_name = canonical
-            .file_name()
+        .file_name()
-            .and_then(|name| name.to_str())
+        .and_then(|name| name.to_str())
-            .unwrap_or("new-project");
+        .unwrap_or("new-project");
 
-        let project_params = ProjectParams {
+    let project_params = ProjectParams {
-            name: project_name.to_owned(),
+        name: project_name.to_owned(),
-        };
+    };
 
-        match self.kind {
+    match options.kind {
-            InitKind::Place => init_place(&base_path, project_params)?,
+        InitKind::Place => init_place(&base_path, project_params),
-            InitKind::Model => init_model(&base_path, project_params)?,
+        InitKind::Model => init_model(&base_path, project_params),
-        }
-
-        println!("Created project successfully.");
-
-        Ok(())
     }
 }
 
-/// The templates we support for initializing a Rojo project.
+fn init_place(base_path: &Path, project_params: ProjectParams) -> Result<(), anyhow::Error> {
-#[derive(Debug, Clone, Copy)]
+    eprintln!("Creating new place project '{}'", project_params.name);
-pub enum InitKind {
-    /// A place that contains a baseplate.
-    Place,
-
-    /// An empty model, suitable for a library or plugin.
-    Model,
-}
-
-impl FromStr for InitKind {
-    type Err = anyhow::Error;
-
-    fn from_str(source: &str) -> Result<Self, Self::Err> {
-        match source {
-            "place" => Ok(InitKind::Place),
-            "model" => Ok(InitKind::Model),
-            _ => Err(format_err!(
-                "Invalid init kind '{}'. Valid kinds are: place, model",
-                source
-            )),
-        }
-    }
-}
-
-fn init_place(base_path: &Path, project_params: ProjectParams) -> anyhow::Result<()> {
-    println!("Creating new place project '{}'", project_params.name);
 
     let project_file = project_params.render_template(PLACE_PROJECT);
     try_create_project(base_path, &project_file)?;
@@ -123,11 +88,13 @@ fn init_place(base_path: &Path, project_params: ProjectParams) -> anyhow::Result
     let git_ignore = project_params.render_template(PLACE_GIT_IGNORE);
     try_git_init(base_path, &git_ignore)?;
 
+    eprintln!("Created project successfully.");
+
     Ok(())
 }
 
-fn init_model(base_path: &Path, project_params: ProjectParams) -> anyhow::Result<()> {
+fn init_model(base_path: &Path, project_params: ProjectParams) -> Result<(), anyhow::Error> {
-    println!("Creating new model project '{}'", project_params.name);
+    eprintln!("Creating new model project '{}'", project_params.name);
 
     let project_file = project_params.render_template(MODEL_PROJECT);
     try_create_project(base_path, &project_file)?;
@@ -144,6 +111,8 @@ fn init_model(base_path: &Path, project_params: ProjectParams) -> anyhow::Result
     let git_ignore = project_params.render_template(MODEL_GIT_IGNORE);
     try_git_init(base_path, &git_ignore)?;
 
+    eprintln!("Created project successfully.");
+
     Ok(())
 }
 
@@ -169,7 +138,7 @@ fn try_git_init(path: &Path, git_ignore: &str) -> Result<(), anyhow::Error> {
         let status = Command::new("git").arg("init").current_dir(path).status()?;
 
         if !status.success() {
-            bail!("git init failed: status code {:?}", status.code());
+            return Err(Error::GitInit.into());
         }
     }
 
@@ -226,15 +195,13 @@ fn try_create_project(base_path: &Path, contents: &str) -> Result<(), anyhow::Er
     let file_res = OpenOptions::new()
         .write(true)
         .create_new(true)
-        .open(&project_path);
+        .open(project_path);
 
     let mut file = match file_res {
         Ok(file) => file,
         Err(err) => {
             return match err.kind() {
-                io::ErrorKind::AlreadyExists => {
+                io::ErrorKind::AlreadyExists => Err(Error::AlreadyExists.into()),
-                    bail!("Project file already exists: {}", project_path.display())
-                }
                 _ => Err(err.into()),
             }
         }

src/cli/mod.rs

@@ -2,24 +2,30 @@
 
 mod build;
 mod doc;
-mod fmt_project;
 mod init;
 mod plugin;
 mod serve;
 mod upload;
 
-use std::{borrow::Cow, env, path::Path, str::FromStr};
+use std::{
+    borrow::Cow,
+    env,
+    error::Error,
+    fmt,
+    net::IpAddr,
+    path::{Path, PathBuf},
+    str::FromStr,
+};
 
 use structopt::StructOpt;
 use thiserror::Error;
 
-pub use self::build::BuildCommand;
+pub use self::build::*;
-pub use self::doc::DocCommand;
+pub use self::doc::*;
-pub use self::fmt_project::FmtProjectCommand;
+pub use self::init::*;
-pub use self::init::{InitCommand, InitKind};
+pub use self::plugin::*;
-pub use self::plugin::{PluginCommand, PluginSubcommand};
+pub use self::serve::*;
-pub use self::serve::ServeCommand;
+pub use self::upload::*;
-pub use self::upload::UploadCommand;
 
 /// Command line options that Rojo accepts, defined using the structopt crate.
 #[derive(Debug, StructOpt)]
@@ -33,20 +39,6 @@ pub struct Options {
     pub subcommand: Subcommand,
 }
 
-impl Options {
-    pub fn run(self) -> anyhow::Result<()> {
-        match self.subcommand {
-            Subcommand::Init(subcommand) => subcommand.run(),
-            Subcommand::Serve(subcommand) => subcommand.run(self.global),
-            Subcommand::Build(subcommand) => subcommand.run(),
-            Subcommand::Upload(subcommand) => subcommand.run(),
-            Subcommand::FmtProject(subcommand) => subcommand.run(),
-            Subcommand::Doc(subcommand) => subcommand.run(),
-            Subcommand::Plugin(subcommand) => subcommand.run(),
-        }
-    }
-}
-
 #[derive(Debug, StructOpt)]
 pub struct GlobalOptions {
     /// Sets verbosity level. Can be specified multiple times.
@@ -108,19 +100,218 @@ pub struct ColorChoiceParseError {
 
 #[derive(Debug, StructOpt)]
 pub enum Subcommand {
+    /// Creates a new Rojo project.
     Init(InitCommand),
+
+    /// Serves the project's files for use with the Rojo Studio plugin.
     Serve(ServeCommand),
+
+    /// Generates a model or place file from the project.
     Build(BuildCommand),
+
+    /// Generates a place or model file out of the project and uploads it to Roblox.
     Upload(UploadCommand),
-    FmtProject(FmtProjectCommand),
+
-    Doc(DocCommand),
+    /// Open Rojo's documentation in your browser.
+    Doc,
+
+    /// Manages Rojo's Roblox Studio plugin.
     Plugin(PluginCommand),
 }
 
-pub(super) fn resolve_path(path: &Path) -> Cow<'_, Path> {
+/// Initializes a new Rojo project.
+#[derive(Debug, StructOpt)]
+pub struct InitCommand {
+    /// Path to the place to create the project. Defaults to the current directory.
+    #[structopt(default_value = "")]
+    pub path: PathBuf,
+
+    /// The kind of project to create, 'place' or 'model'. Defaults to place.
+    #[structopt(long, default_value = "place")]
+    pub kind: InitKind,
+}
+
+impl InitCommand {
+    pub fn absolute_path(&self) -> Cow<'_, Path> {
+        resolve_path(&self.path)
+    }
+}
+
+/// The templates we support for initializing a Rojo project.
+#[derive(Debug, Clone, Copy)]
+pub enum InitKind {
+    /// A place that matches what File -> New does in Roblox Studio.
+    Place,
+
+    /// An empty model, suitable for a library or plugin.
+    Model,
+}
+
+impl FromStr for InitKind {
+    type Err = InitKindParseError;
+
+    fn from_str(source: &str) -> Result<Self, Self::Err> {
+        match source {
+            "place" => Ok(InitKind::Place),
+            "model" => Ok(InitKind::Model),
+            _ => Err(InitKindParseError {
+                attempted: source.to_owned(),
+            }),
+        }
+    }
+}
+
+/// Error type for failing to parse an `InitKind`.
+#[derive(Debug)]
+pub struct InitKindParseError {
+    attempted: String,
+}
+
+impl Error for InitKindParseError {}
+
+impl fmt::Display for InitKindParseError {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            formatter,
+            "Invalid init kind '{}'. Valid kinds are: place, model",
+            self.attempted
+        )
+    }
+}
+
+/// Expose a Rojo project through a web server that can communicate with the
+/// Rojo Roblox Studio plugin, or be visited by the user in the browser.
+#[derive(Debug, StructOpt)]
+pub struct ServeCommand {
+    /// Path to the project to serve. Defaults to the current directory.
+    #[structopt(default_value = "")]
+    pub project: PathBuf,
+
+    /// The IP address to listen on. Defaults to `127.0.0.1`.
+    #[structopt(long)]
+    pub address: Option<IpAddr>,
+
+    /// The port to listen on. Defaults to the project's preference, or `34872` if
+    /// it has none.
+    #[structopt(long)]
+    pub port: Option<u16>,
+}
+
+impl ServeCommand {
+    pub fn absolute_project(&self) -> Cow<'_, Path> {
+        resolve_path(&self.project)
+    }
+}
+
+/// Build a Rojo project into a file.
+#[derive(Debug, StructOpt)]
+pub struct BuildCommand {
+    /// Path to the project to serve. Defaults to the current directory.
+    #[structopt(default_value = "")]
+    pub project: PathBuf,
+
+    /// Where to output the result.
+    #[structopt(long, short)]
+    pub output: PathBuf,
+
+    /// Whether to automatically rebuild when any input files change.
+    #[structopt(long)]
+    pub watch: bool,
+}
+
+impl BuildCommand {
+    pub fn absolute_project(&self) -> Cow<'_, Path> {
+        resolve_path(&self.project)
+    }
+}
+
+/// Build and upload a Rojo project to Roblox.com.
+#[derive(Debug, StructOpt)]
+pub struct UploadCommand {
+    /// Path to the project to upload. Defaults to the current directory.
+    #[structopt(default_value = "")]
+    pub project: PathBuf,
+
+    /// Authenication cookie to use. If not specified, Rojo will attempt to find one from the system automatically.
+    #[structopt(long)]
+    pub cookie: Option<String>,
+
+    /// Asset ID to upload to.
+    #[structopt(long = "asset_id")]
+    pub asset_id: u64,
+}
+
+impl UploadCommand {
+    pub fn absolute_project(&self) -> Cow<'_, Path> {
+        resolve_path(&self.project)
+    }
+}
+
+/// The kind of asset to upload to the website. Affects what endpoints Rojo uses
+/// and changes how the asset is built.
+#[derive(Debug, Clone, Copy)]
+pub enum UploadKind {
+    /// Upload to a place.
+    Place,
+
+    /// Upload to a model-like asset, like a Model, Plugin, or Package.
+    Model,
+}
+
+impl FromStr for UploadKind {
+    type Err = UploadKindParseError;
+
+    fn from_str(source: &str) -> Result<Self, Self::Err> {
+        match source {
+            "place" => Ok(UploadKind::Place),
+            "model" => Ok(UploadKind::Model),
+            _ => Err(UploadKindParseError {
+                attempted: source.to_owned(),
+            }),
+        }
+    }
+}
+
+/// Error type for failing to parse an `UploadKind`.
+#[derive(Debug)]
+pub struct UploadKindParseError {
+    attempted: String,
+}
+
+impl Error for UploadKindParseError {}
+
+impl fmt::Display for UploadKindParseError {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            formatter,
+            "Invalid upload kind '{}'. Valid kinds are: place, model",
+            self.attempted
+        )
+    }
+}
+
+fn resolve_path(path: &Path) -> Cow<'_, Path> {
     if path.is_absolute() {
         Cow::Borrowed(path)
     } else {
         Cow::Owned(env::current_dir().unwrap().join(path))
     }
 }
+
+#[derive(Debug, StructOpt)]
+pub enum PluginSubcommand {
+    /// Install the plugin in Roblox Studio's plugins folder. If the plugin is
+    /// already installed, installing it again will overwrite the current plugin
+    /// file.
+    Install,
+
+    /// Removes the plugin if it is installed.
+    Uninstall,
+}
+
+/// Install Rojo's plugin.
+#[derive(Debug, StructOpt)]
+pub struct PluginCommand {
+    #[structopt(subcommand)]
+    subcommand: PluginSubcommand,
+}

src/cli/plugin.rs

@@ -3,50 +3,26 @@ use std::{
     io::BufWriter,
 };
 
+use anyhow::Result;
 use memofs::{InMemoryFs, Vfs, VfsSnapshot};
 use roblox_install::RobloxStudio;
-use structopt::StructOpt;
 
-use crate::serve_session::ServeSession;
+use crate::{
+    cli::{PluginCommand, PluginSubcommand},
+    serve_session::ServeSession,
+};
 
 static PLUGIN_BINCODE: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/plugin.bincode"));
 static PLUGIN_FILE_NAME: &str = "RojoManagedPlugin.rbxm";
 
-/// Install Rojo's plugin.
+pub fn plugin(options: PluginCommand) -> Result<()> {
-#[derive(Debug, StructOpt)]
+    match options.subcommand {
-pub struct PluginCommand {
+        PluginSubcommand::Install => install_plugin(),
-    #[structopt(subcommand)]
+        PluginSubcommand::Uninstall => uninstall_plugin(),
-    subcommand: PluginSubcommand,
-}
-
-/// Manages Rojo's Roblox Studio plugin.
-#[derive(Debug, StructOpt)]
-pub enum PluginSubcommand {
-    /// Install the plugin in Roblox Studio's plugins folder. If the plugin is
-    /// already installed, installing it again will overwrite the current plugin
-    /// file.
-    Install,
-
-    /// Removes the plugin if it is installed.
-    Uninstall,
-}
-
-impl PluginCommand {
-    pub fn run(self) -> anyhow::Result<()> {
-        self.subcommand.run()
     }
 }
 
-impl PluginSubcommand {
+pub fn install_plugin() -> Result<()> {
-    pub fn run(self) -> anyhow::Result<()> {
-        match self {
-            PluginSubcommand::Install => install_plugin(),
-            PluginSubcommand::Uninstall => uninstall_plugin(),
-        }
-    }
-}
-
-fn install_plugin() -> anyhow::Result<()> {
     let plugin_snapshot: VfsSnapshot = bincode::deserialize(PLUGIN_BINCODE)
         .expect("Rojo's plugin was not properly packed into Rojo's binary");
 
@@ -73,12 +49,12 @@ fn install_plugin() -> anyhow::Result<()> {
     let tree = session.tree();
     let root_id = tree.get_root_id();
 
-    rbx_binary::to_writer(&mut file, tree.inner(), &[root_id])?;
+    rbx_binary::encode(tree.inner(), &[root_id], &mut file)?;
 
     Ok(())
 }
 
-fn uninstall_plugin() -> anyhow::Result<()> {
+fn uninstall_plugin() -> Result<()> {
     let studio = RobloxStudio::locate()?;
 
     let plugin_path = studio.plugins_path().join(PLUGIN_FILE_NAME);

src/cli/serve.rs

@@ -1,73 +1,52 @@
 use std::{
     io::{self, Write},
-    net::{IpAddr, Ipv4Addr},
+    net::IpAddr,
-    path::PathBuf,
+    net::Ipv4Addr,
     sync::Arc,
 };
 
+use anyhow::Result;
 use memofs::Vfs;
-use structopt::StructOpt;
 use termcolor::{BufferWriter, Color, ColorChoice, ColorSpec, WriteColor};
 
-use crate::{serve_session::ServeSession, web::LiveServer};
+use crate::{
-
+    cli::{GlobalOptions, ServeCommand},
-use super::{resolve_path, GlobalOptions};
+    serve_session::ServeSession,
+    web::LiveServer,
+};
 
 const DEFAULT_BIND_ADDRESS: Ipv4Addr = Ipv4Addr::new(127, 0, 0, 1);
 const DEFAULT_PORT: u16 = 34872;
 
-/// Expose a Rojo project to the Rojo Studio plugin.
+pub fn serve(global: GlobalOptions, options: ServeCommand) -> Result<()> {
-#[derive(Debug, StructOpt)]
+    let vfs = Vfs::new_default();
-pub struct ServeCommand {
-    /// Path to the project to serve. Defaults to the current directory.
-    #[structopt(default_value = "")]
-    pub project: PathBuf,
 
-    /// The IP address to listen on. Defaults to `127.0.0.1`.
+    let session = Arc::new(ServeSession::new(vfs, &options.absolute_project())?);
-    #[structopt(long)]
-    pub address: Option<IpAddr>,
 
-    /// The port to listen on. Defaults to the project's preference, or `34872` if
+    let ip = options.address.unwrap_or(DEFAULT_BIND_ADDRESS.into());
-    /// it has none.
-    #[structopt(long)]
-    pub port: Option<u16>,
-}
 
-impl ServeCommand {
+    let port = options
-    pub fn run(self, global: GlobalOptions) -> anyhow::Result<()> {
+        .port
-        let project_path = resolve_path(&self.project);
+        .or_else(|| session.project_port())
+        .unwrap_or(DEFAULT_PORT);
 
-        let vfs = Vfs::new_default();
+    let server = LiveServer::new(session);
 
-        let session = Arc::new(ServeSession::new(vfs, &project_path)?);
+    let _ = show_start_message(ip, port, global.color.into());
+    server.start((ip, port).into());
 
-        let ip = self.address.unwrap_or(DEFAULT_BIND_ADDRESS.into());
+    Ok(())
-
-        let port = self
-            .port
-            .or_else(|| session.project_port())
-            .unwrap_or(DEFAULT_PORT);
-
-        let server = LiveServer::new(session);
-
-        let _ = show_start_message(ip, port, global.color.into());
-        server.start((ip, port).into());
-
-        Ok(())
-    }
 }
 
 fn show_start_message(bind_address: IpAddr, port: u16, color: ColorChoice) -> io::Result<()> {
-    let mut green = ColorSpec::new();
-    green.set_fg(Some(Color::Green)).set_bold(true);
-
     let writer = BufferWriter::stdout(color);
     let mut buffer = writer.buffer();
 
     writeln!(&mut buffer, "Rojo server listening:")?;
 
     write!(&mut buffer, "  Address: ")?;
-    buffer.set_color(&green)?;
+    buffer.set_color(ColorSpec::new().set_fg(Some(Color::Green)).set_bold(true))?;
+
     if bind_address.is_loopback() {
         writeln!(&mut buffer, "localhost")?;
     } else {
@@ -76,7 +55,7 @@ fn show_start_message(bind_address: IpAddr, port: u16, color: ColorChoice) -> io
 
     buffer.set_color(&ColorSpec::new())?;
     write!(&mut buffer, "  Port:    ")?;
-    buffer.set_color(&green)?;
+    buffer.set_color(ColorSpec::new().set_fg(Some(Color::Green)).set_bold(true))?;
     writeln!(&mut buffer, "{}", port)?;
 
     writeln!(&mut buffer)?;
@@ -84,7 +63,7 @@ fn show_start_message(bind_address: IpAddr, port: u16, color: ColorChoice) -> io
     buffer.set_color(&ColorSpec::new())?;
     write!(&mut buffer, "Visit ")?;
 
-    buffer.set_color(&green)?;
+    buffer.set_color(ColorSpec::new().set_fg(Some(Color::Green)).set_bold(true))?;
     write!(&mut buffer, "http://localhost:{}/", port)?;
 
     buffer.set_color(&ColorSpec::new())?;

src/cli/upload.rs

@@ -1,87 +1,50 @@
-use std::path::PathBuf;
-use std::str::FromStr;
-
-use anyhow::{bail, format_err, Context};
 use memofs::Vfs;
 use reqwest::{
     header::{ACCEPT, CONTENT_TYPE, COOKIE, USER_AGENT},
     StatusCode,
 };
-use structopt::StructOpt;
+use thiserror::Error;
 
-use crate::{auth_cookie::get_auth_cookie, serve_session::ServeSession};
+use crate::{auth_cookie::get_auth_cookie, cli::UploadCommand, serve_session::ServeSession};
 
-use super::resolve_path;
+#[derive(Debug, Error)]
+enum Error {
+    #[error("Rojo could not find your Roblox auth cookie. Please pass one via --cookie.")]
+    NeedAuthCookie,
 
-/// Builds the project and uploads it to Roblox.
+    #[error("The Roblox API returned an unexpected error: {body}")]
-#[derive(Debug, StructOpt)]
+    RobloxApi { body: String },
-pub struct UploadCommand {
-    /// Path to the project to upload. Defaults to the current directory.
-    #[structopt(default_value = "")]
-    pub project: PathBuf,
-
-    /// Authenication cookie to use. If not specified, Rojo will attempt to find one from the system automatically.
-    #[structopt(long)]
-    pub cookie: Option<String>,
-
-    /// Asset ID to upload to.
-    #[structopt(long = "asset_id")]
-    pub asset_id: u64,
 }
 
-impl UploadCommand {
+pub fn upload(options: UploadCommand) -> Result<(), anyhow::Error> {
-    pub fn run(self) -> Result<(), anyhow::Error> {
+    let cookie = options
-        let project_path = resolve_path(&self.project);
+        .cookie
+        .clone()
+        .or_else(get_auth_cookie)
+        .ok_or(Error::NeedAuthCookie)?;
 
-        let cookie = self.cookie.or_else(get_auth_cookie).context(
+    let vfs = Vfs::new_default();
-            "Rojo could not find your Roblox auth cookie. Please pass one via --cookie.",
-        )?;
 
-        let vfs = Vfs::new_default();
+    let session = ServeSession::new(vfs, &options.absolute_project())?;
 
-        let session = ServeSession::new(vfs, project_path)?;
+    let tree = session.tree();
+    let inner_tree = tree.inner();
+    let root_id = inner_tree.get_root_id();
+    let root_instance = inner_tree.get_instance(root_id).unwrap();
 
-        let tree = session.tree();
+    let encode_ids = match root_instance.class_name.as_str() {
-        let inner_tree = tree.inner();
+        "DataModel" => root_instance.get_children_ids().to_vec(),
-        let root = inner_tree.root();
+        _ => vec![root_id],
+    };
 
-        let encode_ids = match root.class.as_str() {
+    let mut buffer = Vec::new();
-            "DataModel" => root.children().to_vec(),
-            _ => vec![root.referent()],
-        };
 
-        let mut buffer = Vec::new();
+    log::trace!("Encoding XML model");
+    let config = rbx_xml::EncodeOptions::new()
+        .property_behavior(rbx_xml::EncodePropertyBehavior::WriteUnknown);
 
-        log::trace!("Encoding binary model");
+    rbx_xml::to_writer(&mut buffer, tree.inner(), &encode_ids, config)?;
-        rbx_binary::to_writer(&mut buffer, tree.inner(), &encode_ids)?;
+    do_upload(buffer, options.asset_id, &cookie)
-        do_upload(buffer, self.asset_id, &cookie)
-    }
-}
-
-/// The kind of asset to upload to the website. Affects what endpoints Rojo uses
-/// and changes how the asset is built.
-#[derive(Debug, Clone, Copy)]
-enum UploadKind {
-    /// Upload to a place.
-    Place,
-
-    /// Upload to a model-like asset, like a Model, Plugin, or Package.
-    Model,
-}
-
-impl FromStr for UploadKind {
-    type Err = anyhow::Error;
-
-    fn from_str(source: &str) -> Result<Self, Self::Err> {
-        match source {
-            "place" => Ok(UploadKind::Place),
-            "model" => Ok(UploadKind::Model),
-            attempted => Err(format_err!(
-                "Invalid upload kind '{}'. Valid kinds are: place, model",
-                attempted
-            )),
-        }
-    }
 }
 
 fn do_upload(buffer: Vec<u8>, asset_id: u64, cookie: &str) -> anyhow::Result<()> {
@@ -117,10 +80,10 @@ fn do_upload(buffer: Vec<u8>, asset_id: u64, cookie: &str) -> anyhow::Result<()>
 
     let status = response.status();
     if !status.is_success() {
-        bail!(
+        return Err(Error::RobloxApi {
-            "The Roblox API returned an unexpected error: {}",
+            body: response.text()?,
-            response.text()?
+        }
-        );
+        .into());
     }
 
     Ok(())

src/lib.rs

@@ -15,7 +15,6 @@ mod message_queue;
 mod multimap;
 mod path_serializer;
 mod project;
-mod resolution;
 mod serve_session;
 mod session_id;
 mod snapshot;

src/lua_ast.rs

@@ -1,5 +1,4 @@
-//! Defines module for defining a small Lua AST for simple codegen. Rojo uses
+//! Defines module for defining a small Lua AST for simple codegen.
-//! this module to convert JSON into generated Lua code.
 
 use std::{
     fmt::{self, Write},

src/message_queue.rs

@@ -1,6 +1,26 @@
 use std::sync::{Mutex, RwLock};
 
-use futures::channel::oneshot;
+use futures::sync::oneshot;
+
+struct Listener<T> {
+    sender: oneshot::Sender<(u32, Vec<T>)>,
+    cursor: u32,
+}
+
+fn fire_listener_if_ready<T: Clone>(
+    messages: &[T],
+    listener: Listener<T>,
+) -> Result<(), Listener<T>> {
+    let current_cursor = messages.len() as u32;
+
+    if listener.cursor < current_cursor {
+        let new_messages = messages[(listener.cursor as usize)..].to_vec();
+        let _ = listener.sender.send((current_cursor, new_messages));
+        Ok(())
+    } else {
+        Err(listener)
+    }
+}
 
 /// A message queue with persistent history that can be subscribed to.
 ///
@@ -77,23 +97,3 @@ impl<T: Clone> MessageQueue<T> {
         self.messages.read().unwrap().len() as u32
     }
 }
-
-struct Listener<T> {
-    sender: oneshot::Sender<(u32, Vec<T>)>,
-    cursor: u32,
-}
-
-fn fire_listener_if_ready<T: Clone>(
-    messages: &[T],
-    listener: Listener<T>,
-) -> Result<(), Listener<T>> {
-    let current_cursor = messages.len() as u32;
-
-    if listener.cursor < current_cursor {
-        let new_messages = messages[(listener.cursor as usize)..].to_vec();
-        let _ = listener.sender.send((current_cursor, new_messages));
-        Ok(())
-    } else {
-        Err(listener)
-    }
-}

src/project.rs

@@ -4,10 +4,11 @@ use std::{
     path::{Path, PathBuf},
 };
 
+use rbx_dom_weak::UnresolvedRbxValue;
 use serde::{Deserialize, Serialize};
 use thiserror::Error;
 
-use crate::{glob::Glob, resolution::UnresolvedValue};
+use crate::glob::Glob;
 
 static PROJECT_FILENAME: &str = "default.project.json";
 
@@ -57,16 +58,6 @@ pub struct Project {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub serve_place_ids: Option<HashSet<u64>>,
 
-    /// If specified, sets the current place's place ID when connecting to the
-    /// Rojo server from Roblox Studio.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub place_id: Option<u64>,
-
-    /// If specified, sets the current place's game ID when connecting to the
-    /// Rojo server from Roblox Studio.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub game_id: Option<u64>,
-
     /// A list of globs, relative to the folder the project file is in, that
     /// match files that should be excluded if Rojo encounters them.
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
@@ -192,7 +183,7 @@ pub struct ProjectNode {
         default,
         skip_serializing_if = "HashMap::is_empty"
     )]
-    pub properties: HashMap<String, UnresolvedValue>,
+    pub properties: HashMap<String, UnresolvedRbxValue>,
 
     /// Defines the behavior when Rojo encounters unknown instances in Roblox
     /// Studio during live sync. `$ignoreUnknownInstances` should be considered

src/resolution.rs

@@ -1,273 +0,0 @@
-use std::borrow::Borrow;
-
-use anyhow::format_err;
-use rbx_dom_weak::types::{Color3, Content, Enum, Variant, VariantType, Vector2, Vector3};
-use rbx_reflection::{DataType, PropertyDescriptor};
-use serde::{Deserialize, Serialize};
-
-/// A user-friendly version of `Variant` that supports specifying ambiguous
-/// values. Ambiguous values need a reflection database to be resolved to a
-/// usable value.
-///
-/// This type is used in Rojo projects and JSON models to make specifying the
-/// most common types of properties, like strings or vectors, much easier.
-#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
-#[serde(untagged)]
-pub enum UnresolvedValue {
-    FullyQualified(Variant),
-    Ambiguous(AmbiguousValue),
-}
-
-impl UnresolvedValue {
-    pub fn resolve(self, class_name: &str, prop_name: &str) -> anyhow::Result<Variant> {
-        match self {
-            UnresolvedValue::FullyQualified(full) => Ok(full),
-            UnresolvedValue::Ambiguous(partial) => partial.resolve(class_name, prop_name),
-        }
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
-#[serde(untagged)]
-pub enum AmbiguousValue {
-    Bool(bool),
-    String(String),
-    Number(f64),
-    Array2([f64; 2]),
-    Array3([f64; 3]),
-    Array4([f64; 4]),
-}
-
-impl AmbiguousValue {
-    pub fn resolve(self, class_name: &str, prop_name: &str) -> anyhow::Result<Variant> {
-        let property = find_descriptor(class_name, prop_name)
-            .ok_or_else(|| format_err!("Unknown property {}.{}", class_name, prop_name))?;
-
-        match &property.data_type {
-            DataType::Enum(enum_name) => {
-                let database = rbx_reflection_database::get();
-
-                let enum_descriptor = database.enums.get(enum_name).ok_or_else(|| {
-                    format_err!("Unknown enum {}. This is a Rojo bug!", enum_name)
-                })?;
-
-                let error = |what: &str| {
-                    let mut all_values = enum_descriptor
-                        .items
-                        .keys()
-                        .map(|value| value.borrow())
-                        .collect::<Vec<_>>();
-                    all_values.sort();
-
-                    let examples = nonexhaustive_list(&all_values);
-
-                    format_err!(
-                        "Invalid value for property {}.{}. Got {} but \
-                         expected a member of the {} enum such as {}",
-                        class_name,
-                        prop_name,
-                        what,
-                        enum_name,
-                        examples,
-                    )
-                };
-
-                let value = match self {
-                    AmbiguousValue::String(value) => value,
-                    unresolved => return Err(error(unresolved.describe())),
-                };
-
-                let resolved = enum_descriptor
-                    .items
-                    .get(value.as_str())
-                    .ok_or_else(|| error(value.as_str()))?;
-
-                Ok(Enum::from_u32(*resolved).into())
-            }
-            DataType::Value(variant_ty) => match (variant_ty, self) {
-                (VariantType::Bool, AmbiguousValue::Bool(value)) => Ok(value.into()),
-
-                (VariantType::Float32, AmbiguousValue::Number(value)) => Ok((value as f32).into()),
-                (VariantType::Float64, AmbiguousValue::Number(value)) => Ok(value.into()),
-                (VariantType::Int32, AmbiguousValue::Number(value)) => Ok((value as i32).into()),
-                (VariantType::Int64, AmbiguousValue::Number(value)) => Ok((value as i64).into()),
-
-                (VariantType::String, AmbiguousValue::String(value)) => Ok(value.into()),
-                (VariantType::Content, AmbiguousValue::String(value)) => {
-                    Ok(Content::from(value).into())
-                }
-
-                (VariantType::Vector2, AmbiguousValue::Array2(value)) => {
-                    Ok(Vector2::new(value[0] as f32, value[1] as f32).into())
-                }
-
-                (VariantType::Vector3, AmbiguousValue::Array3(value)) => {
-                    Ok(Vector3::new(value[0] as f32, value[1] as f32, value[2] as f32).into())
-                }
-
-                (VariantType::Color3, AmbiguousValue::Array3(value)) => {
-                    Ok(Color3::new(value[0] as f32, value[1] as f32, value[2] as f32).into())
-                }
-
-                (_, unresolved) => Err(format_err!(
-                    "Wrong type of value for property {}.{}. Expected {:?}, got {}",
-                    class_name,
-                    prop_name,
-                    variant_ty,
-                    unresolved.describe(),
-                )),
-            },
-            _ => Err(format_err!(
-                "Unknown data type for property {}.{}",
-                class_name,
-                prop_name
-            )),
-        }
-    }
-
-    fn describe(&self) -> &'static str {
-        match self {
-            AmbiguousValue::Bool(_) => "a bool",
-            AmbiguousValue::String(_) => "a string",
-            AmbiguousValue::Number(_) => "a number",
-            AmbiguousValue::Array2(_) => "an array of two numbers",
-            AmbiguousValue::Array3(_) => "an array of three numbers",
-            AmbiguousValue::Array4(_) => "an array of four numbers",
-        }
-    }
-}
-
-fn find_descriptor(
-    class_name: &str,
-    prop_name: &str,
-) -> Option<&'static PropertyDescriptor<'static>> {
-    let database = rbx_reflection_database::get();
-    let mut current_class_name = class_name;
-
-    loop {
-        let class = database.classes.get(current_class_name)?;
-        if let Some(descriptor) = class.properties.get(prop_name) {
-            return Some(descriptor);
-        }
-
-        current_class_name = class.superclass.as_deref()?;
-    }
-}
-
-/// Outputs a string containing up to MAX_ITEMS entries from the given list. If
-/// there are more than MAX_ITEMS items, the number of remaining items will be
-/// listed.
-fn nonexhaustive_list(values: &[&str]) -> String {
-    use std::fmt::Write;
-
-    const MAX_ITEMS: usize = 8;
-
-    let mut output = String::new();
-
-    let last_index = values.len() - 1;
-    let main_length = last_index.min(9);
-
-    let main_list = &values[..main_length];
-    for value in main_list {
-        output.push_str(value);
-        output.push_str(", ");
-    }
-
-    if values.len() > MAX_ITEMS {
-        write!(output, "or {} more", values.len() - main_length).unwrap();
-    } else {
-        output.push_str("or ");
-        output.push_str(values[values.len() - 1]);
-    }
-
-    output
-}
-
-#[cfg(test)]
-mod test {
-    use super::*;
-
-    fn resolve(class: &str, prop: &str, json_value: &str) -> Variant {
-        let unresolved: UnresolvedValue = serde_json::from_str(json_value).unwrap();
-        unresolved.resolve(class, prop).unwrap()
-    }
-
-    #[test]
-    fn bools() {
-        assert_eq!(resolve("BoolValue", "Value", "false"), Variant::Bool(false));
-
-        // Script.Disabled is inherited from BaseScript
-        assert_eq!(resolve("Script", "Disabled", "true"), Variant::Bool(true));
-    }
-
-    #[test]
-    fn strings() {
-        // String literals can stay as strings
-        assert_eq!(
-            resolve("StringValue", "Value", "\"Hello!\""),
-            Variant::String("Hello!".into()),
-        );
-
-        // String literals can also turn into Content
-        assert_eq!(
-            resolve("Sky", "MoonTextureId", "\"rbxassetid://12345\""),
-            Variant::Content("rbxassetid://12345".into()),
-        );
-
-        // What about BinaryString values? For forward-compatibility reasons, we
-        // don't support any shorthands for BinaryString.
-        //
-        // assert_eq!(
-        //     resolve("Folder", "Tags", "\"a\\u0000b\\u0000c\""),
-        //     Variant::BinaryString(b"a\0b\0c".to_vec().into()),
-        // );
-    }
-
-    #[test]
-    fn numbers() {
-        assert_eq!(
-            resolve("Part", "CollisionGroupId", "123"),
-            Variant::Int32(123),
-        );
-
-        assert_eq!(
-            resolve("Folder", "SourceAssetId", "532413"),
-            Variant::Int64(532413),
-        );
-
-        assert_eq!(resolve("Part", "Transparency", "1"), Variant::Float32(1.0));
-        assert_eq!(resolve("NumberValue", "Value", "1"), Variant::Float64(1.0));
-    }
-
-    #[test]
-    fn vectors() {
-        assert_eq!(
-            resolve("ParticleEmitter", "SpreadAngle", "[1, 2]"),
-            Variant::Vector2(Vector2::new(1.0, 2.0)),
-        );
-
-        assert_eq!(
-            resolve("Part", "Position", "[4, 5, 6]"),
-            Variant::Vector3(Vector3::new(4.0, 5.0, 6.0)),
-        );
-    }
-
-    #[test]
-    fn colors() {
-        assert_eq!(
-            resolve("Part", "Color", "[1, 1, 1]"),
-            Variant::Color3(Color3::new(1.0, 1.0, 1.0)),
-        );
-
-        // There aren't any user-facing Color3uint8 properties. If there are
-        // some, we should treat them the same in the future.
-    }
-
-    #[test]
-    fn enums() {
-        assert_eq!(
-            resolve("Lighting", "Technology", "\"Voxel\""),
-            Variant::Enum(Enum::from_u32(1)),
-        );
-    }
-}

src/serve_session.rs

@@ -10,6 +10,7 @@ use std::{
 use crossbeam_channel::Sender;
 use memofs::IoResultExt;
 use memofs::Vfs;
+use rbx_dom_weak::RbxInstanceProperties;
 use thiserror::Error;
 
 use crate::{
@@ -18,15 +19,13 @@ use crate::{
     project::{Project, ProjectError},
     session_id::SessionId,
     snapshot::{
-        apply_patch_set, compute_patch_set, AppliedPatchSet, InstanceContext, InstanceSnapshot,
+        apply_patch_set, compute_patch_set, AppliedPatchSet, InstanceContext,
-        PatchSet, RojoTree,
+        InstancePropertiesWithMeta, PatchSet, RojoTree,
     },
     snapshot_middleware::snapshot_from_vfs,
 };
 
-/// Contains all of the state for a Rojo serve session. A serve session is used
+/// Contains all of the state for a Rojo serve session.
-/// when we need to build a Rojo tree and possibly rebuild it when input files
-/// change.
 ///
 /// Nothing here is specific to any Rojo interface. Though the primary way to
 /// interact with a serve session is Rojo's HTTP right now, there's no reason
@@ -119,7 +118,14 @@ impl ServeSession {
             }
         };
 
-        let mut tree = RojoTree::new(InstanceSnapshot::new());
+        let mut tree = RojoTree::new(InstancePropertiesWithMeta {
+            properties: RbxInstanceProperties {
+                name: "ROOT".to_owned(),
+                class_name: "Folder".to_owned(),
+                properties: Default::default(),
+            },
+            metadata: Default::default(),
+        });
 
         let root_id = tree.get_root_id();
 
@@ -197,14 +203,6 @@ impl ServeSession {
         self.root_project.serve_port
     }
 
-    pub fn place_id(&self) -> Option<u64> {
-        self.root_project.place_id
-    }
-
-    pub fn game_id(&self) -> Option<u64> {
-        self.root_project.game_id
-    }
-
     pub fn start_time(&self) -> Instant {
         self.start_time
     }

src/snapshot/instance_snapshot.rs

@@ -2,10 +2,7 @@
 
 use std::{borrow::Cow, collections::HashMap};
 
-use rbx_dom_weak::{
+use rbx_dom_weak::{RbxId, RbxTree, RbxValue};
-    types::{Ref, Variant},
-    WeakDom,
-};
 use serde::{Deserialize, Serialize};
 
 use super::InstanceMetadata;
@@ -14,12 +11,11 @@ use super::InstanceMetadata;
 ///
 // Possible future improvements:
 // - Use refcounted/interned strings
-// - Replace use of Variant with a sum of Variant + borrowed value
+// - Replace use of RbxValue with a sum of RbxValue + borrowed value
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct InstanceSnapshot {
-    // FIXME: Don't use Option<Ref> anymore!
     /// A temporary ID applied to the snapshot that's used for Ref properties.
-    pub snapshot_id: Option<Ref>,
+    pub snapshot_id: Option<RbxId>,
 
     /// Rojo-specific metadata associated with the instance.
     pub metadata: InstanceMetadata,
@@ -31,7 +27,7 @@ pub struct InstanceSnapshot {
     pub class_name: Cow<'static, str>,
 
     /// All other properties of the instance, weakly-typed.
-    pub properties: HashMap<String, Variant>,
+    pub properties: HashMap<String, RbxValue>,
 
     /// The children of the instance represented as more snapshots.
     ///
@@ -65,16 +61,7 @@ impl InstanceSnapshot {
         }
     }
 
-    pub fn property<K, V>(mut self, key: K, value: V) -> Self
+    pub fn properties(self, properties: impl Into<HashMap<String, RbxValue>>) -> Self {
-    where
-        K: Into<String>,
-        V: Into<Variant>,
-    {
-        self.properties.insert(key.into(), value.into());
-        self
-    }
-
-    pub fn properties(self, properties: impl Into<HashMap<String, Variant>>) -> Self {
         Self {
             properties: properties.into(),
             ..self
@@ -88,13 +75,6 @@ impl InstanceSnapshot {
         }
     }
 
-    pub fn snapshot_id(self, snapshot_id: Option<Ref>) -> Self {
-        Self {
-            snapshot_id,
-            ..self
-        }
-    }
-
     pub fn metadata(self, metadata: impl Into<InstanceMetadata>) -> Self {
         Self {
             metadata: metadata.into(),
@@ -102,13 +82,15 @@ impl InstanceSnapshot {
         }
     }
 
-    pub fn from_tree(tree: &WeakDom, id: Ref) -> Self {
+    pub fn from_tree(tree: &RbxTree, id: RbxId) -> Self {
-        let instance = tree.get_by_ref(id).expect("instance did not exist in tree");
+        let instance = tree
+            .get_instance(id)
+            .expect("instance did not exist in tree");
 
         let children = instance
-            .children()
+            .get_children_ids()
             .iter()
-            .copied()
+            .cloned()
             .map(|id| Self::from_tree(tree, id))
             .collect();
 
@@ -116,7 +98,7 @@ impl InstanceSnapshot {
             snapshot_id: Some(id),
             metadata: InstanceMetadata::default(),
             name: Cow::Owned(instance.name.clone()),
-            class_name: Cow::Owned(instance.class.clone()),
+            class_name: Cow::Owned(instance.class_name.clone()),
             properties: instance.properties.clone(),
             children,
         }

src/snapshot/patch.rs

@@ -2,19 +2,19 @@
 
 use std::collections::HashMap;
 
-use rbx_dom_weak::types::{Ref, Variant};
+use rbx_dom_weak::{RbxId, RbxValue};
 use serde::{Deserialize, Serialize};
 
 use super::{InstanceMetadata, InstanceSnapshot};
 
-/// A set of different kinds of patches that can be applied to an WeakDom.
+/// A set of different kinds of patches that can be applied to an RbxTree.
 ///
 /// These patches shouldn't be persisted: there's no mechanism in place to make
 /// sure that another patch wasn't applied before this one that could cause a
 /// conflict!
 #[derive(Debug, Default, Clone, PartialEq, Serialize, Deserialize)]
 pub struct PatchSet {
-    pub removed_instances: Vec<Ref>,
+    pub removed_instances: Vec<RbxId>,
     pub added_instances: Vec<PatchAdd>,
     pub updated_instances: Vec<PatchUpdate>,
 }
@@ -32,20 +32,20 @@ impl<'a> PatchSet {
 /// A patch containing an instance that was added to the tree.
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct PatchAdd {
-    pub parent_id: Ref,
+    pub parent_id: RbxId,
     pub instance: InstanceSnapshot,
 }
 
 /// A patch indicating that properties of an instance changed.
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct PatchUpdate {
-    pub id: Ref,
+    pub id: RbxId,
     pub changed_name: Option<String>,
     pub changed_class_name: Option<String>,
 
     /// Contains all changed properties. If a property is assigned to `None`,
     /// then that property has been removed.
-    pub changed_properties: HashMap<String, Option<Variant>>,
+    pub changed_properties: HashMap<String, Option<RbxValue>>,
 
     /// Changed Rojo-specific metadata, if any of it changed.
     pub changed_metadata: Option<InstanceMetadata>,
@@ -63,8 +63,8 @@ pub struct PatchUpdate {
 // current values in all fields.
 #[derive(Debug, Clone, Default, Serialize, Deserialize)]
 pub struct AppliedPatchSet {
-    pub removed: Vec<Ref>,
+    pub removed: Vec<RbxId>,
-    pub added: Vec<Ref>,
+    pub added: Vec<RbxId>,
     pub updated: Vec<AppliedPatchUpdate>,
 }
 
@@ -80,17 +80,17 @@ impl AppliedPatchSet {
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct AppliedPatchUpdate {
-    pub id: Ref,
+    pub id: RbxId,
 
     // TODO: Store previous values in order to detect application conflicts
     pub changed_name: Option<String>,
     pub changed_class_name: Option<String>,
-    pub changed_properties: HashMap<String, Option<Variant>>,
+    pub changed_properties: HashMap<String, Option<RbxValue>>,
     pub changed_metadata: Option<InstanceMetadata>,
 }
 
 impl AppliedPatchUpdate {
-    pub fn new(id: Ref) -> Self {
+    pub fn new(id: RbxId) -> Self {
         Self {
             id,
             changed_name: None,

src/snapshot/patch_apply.rs

@@ -2,11 +2,11 @@
 
 use std::collections::HashMap;
 
-use rbx_dom_weak::types::{Ref, Variant};
+use rbx_dom_weak::{RbxId, RbxInstanceProperties, RbxValue};
 
 use super::{
     patch::{AppliedPatchSet, AppliedPatchUpdate, PatchSet, PatchUpdate},
-    InstanceSnapshot, RojoTree,
+    InstancePropertiesWithMeta, InstanceSnapshot, RojoTree,
 };
 
 /// Consumes the input `PatchSet`, applying all of its prescribed changes to the
@@ -37,7 +37,7 @@ pub fn apply_patch_set(tree: &mut RojoTree, patch_set: PatchSet) -> AppliedPatch
 struct PatchApplyContext {
     /// A map from transient snapshot IDs (generated by snapshot middleware) to
     /// instance IDs in the actual tree. These are both the same data type so
-    /// that they fit into the same `Variant::Ref` type.
+    /// that they fit into the same `RbxValue::Ref` type.
     ///
     /// At this point in the patch process, IDs in instance properties have been
     /// partially translated from 'snapshot space' into 'tree space' by the
@@ -53,7 +53,7 @@ struct PatchApplyContext {
     /// #2 should not occur in well-formed projects, but is indistinguishable
     /// from #1 right now. It could happen if two model files try to reference
     /// eachother.
-    snapshot_id_to_instance_id: HashMap<Ref, Ref>,
+    snapshot_id_to_instance_id: HashMap<RbxId, RbxId>,
 
     /// The properties of instances added by the current `PatchSet`.
     ///
@@ -68,7 +68,7 @@ struct PatchApplyContext {
     ///
     /// This doesn't affect updated instances, since they're always applied
     /// after we've added all the instances from the patch.
-    added_instance_properties: HashMap<Ref, HashMap<String, Variant>>,
+    added_instance_properties: HashMap<RbxId, HashMap<String, RbxValue>>,
 
     /// The current applied patch result, describing changes made to the tree.
     applied_patch_set: AppliedPatchSet,
@@ -93,10 +93,11 @@ fn finalize_patch_application(context: PatchApplyContext, tree: &mut RojoTree) -
             .expect("Invalid instance ID in deferred property map");
 
         for (key, mut property_value) in properties {
-            if let Variant::Ref(referent) = property_value {
+            if let RbxValue::Ref { value: Some(id) } = property_value {
-                if let Some(&instance_referent) = context.snapshot_id_to_instance_id.get(&referent)
+                if let Some(&instance_id) = context.snapshot_id_to_instance_id.get(&id) {
-                {
+                    property_value = RbxValue::Ref {
-                    property_value = Variant::Ref(instance_referent);
+                        value: Some(instance_id),
+                    };
                 }
             }
 
@@ -107,40 +108,50 @@ fn finalize_patch_application(context: PatchApplyContext, tree: &mut RojoTree) -
     context.applied_patch_set
 }
 
-fn apply_remove_instance(context: &mut PatchApplyContext, tree: &mut RojoTree, removed_id: Ref) {
+fn apply_remove_instance(context: &mut PatchApplyContext, tree: &mut RojoTree, removed_id: RbxId) {
-    tree.remove(removed_id);
+    match tree.remove_instance(removed_id) {
-    context.applied_patch_set.removed.push(removed_id);
+        Some(_) => context.applied_patch_set.removed.push(removed_id),
+        None => {
+            log::warn!(
+                "Patch misapplication: Tried to remove instance {} but it did not exist.",
+                removed_id
+            );
+        }
+    }
 }
 
 fn apply_add_child(
     context: &mut PatchApplyContext,
     tree: &mut RojoTree,
-    parent_id: Ref,
+    parent_id: RbxId,
     snapshot: InstanceSnapshot,
 ) {
-    let snapshot_id = snapshot.snapshot_id;
+    let properties = InstancePropertiesWithMeta {
-    let properties = snapshot.properties;
+        properties: RbxInstanceProperties {
-    let children = snapshot.children;
+            name: snapshot.name.into_owned(),
+            class_name: snapshot.class_name.into_owned(),
 
-    // Property application is deferred until after all children
+            // Property assignment is deferred until after we know about all
-    // are constructed. This helps apply referents correctly.
+            // instances in this patch. See `PatchApplyContext` for details.
-    let remaining_snapshot = InstanceSnapshot::new()
+            properties: HashMap::new(),
-        .name(snapshot.name)
+        },
-        .class_name(snapshot.class_name)
+        metadata: snapshot.metadata,
-        .metadata(snapshot.metadata)
+    };
-        .snapshot_id(snapshot.snapshot_id);
+
+    let id = tree.insert_instance(properties, parent_id);
 
-    let id = tree.insert_instance(parent_id, remaining_snapshot);
     context.applied_patch_set.added.push(id);
 
-    context.added_instance_properties.insert(id, properties);
+    context
+        .added_instance_properties
+        .insert(id, snapshot.properties);
 
-    if let Some(snapshot_id) = snapshot_id {
+    if let Some(snapshot_id) = snapshot.snapshot_id {
         context.snapshot_id_to_instance_id.insert(snapshot_id, id);
     }
 
-    for child in children {
+    for child_snapshot in snapshot.children {
-        apply_add_child(context, tree, id, child);
+        apply_add_child(context, tree, id, child_snapshot);
     }
 }
 
@@ -156,7 +167,7 @@ fn apply_update_child(context: &mut PatchApplyContext, tree: &mut RojoTree, patc
         Some(instance) => instance,
         None => {
             log::warn!(
-                "Patch misapplication: Instance {:?}, referred to by update patch, did not exist.",
+                "Patch misapplication: Instance {}, referred to by update patch, did not exist.",
                 patch.id
             );
             return;
@@ -178,24 +189,23 @@ fn apply_update_child(context: &mut PatchApplyContext, tree: &mut RojoTree, patc
             // Ref values need to be potentially rewritten from snapshot IDs to
             // instance IDs if they referred to an instance that was created as
             // part of this patch.
-            Some(Variant::Ref(referent)) => {
+            Some(RbxValue::Ref { value: Some(id) }) => {
-                if referent.is_none() {
-                    continue;
-                }
-
                 // If our ID is not found in this map, then it either refers to
                 // an existing instance NOT added by this patch, or there was an
                 // error. See `PatchApplyContext::snapshot_id_to_instance_id`
                 // for more info.
-                let new_referent = context
+                let new_id = context
                     .snapshot_id_to_instance_id
-                    .get(&referent)
+                    .get(&id)
                     .copied()
-                    .unwrap_or(referent);
+                    .unwrap_or(id);
 
-                instance
+                instance.properties_mut().insert(
-                    .properties_mut()
+                    key.clone(),
-                    .insert(key.clone(), Variant::Ref(new_referent));
+                    RbxValue::Ref {
+                        value: Some(new_id),
+                    },
+                );
             }
             Some(ref value) => {
                 instance.properties_mut().insert(key.clone(), value.clone());
@@ -215,10 +225,10 @@ fn apply_update_child(context: &mut PatchApplyContext, tree: &mut RojoTree, patc
 mod test {
     use super::*;
 
-    use std::borrow::Cow;
+    use std::{borrow::Cow, collections::HashMap};
 
     use maplit::hashmap;
-    use rbx_dom_weak::types::Variant;
+    use rbx_dom_weak::RbxValue;
 
     use super::super::PatchAdd;
 
@@ -226,7 +236,14 @@ mod test {
     fn add_from_empty() {
         let _ = env_logger::try_init();
 
-        let mut tree = RojoTree::new(InstanceSnapshot::new());
+        let mut tree = RojoTree::new(InstancePropertiesWithMeta {
+            properties: RbxInstanceProperties {
+                name: "Folder".to_owned(),
+                class_name: "Folder".to_owned(),
+                properties: HashMap::new(),
+            },
+            metadata: Default::default(),
+        });
 
         let root_id = tree.get_root_id();
 
@@ -236,7 +253,7 @@ mod test {
             name: Cow::Borrowed("Foo"),
             class_name: Cow::Borrowed("Bar"),
             properties: hashmap! {
-                "Baz".to_owned() => Variant::Int32(5),
+                "Baz".to_owned() => RbxValue::Int32 { value: 5 },
             },
             children: Vec::new(),
         };
@@ -265,14 +282,18 @@ mod test {
     fn update_existing() {
         let _ = env_logger::try_init();
 
-        let mut tree = RojoTree::new(
+        let mut tree = RojoTree::new(InstancePropertiesWithMeta {
-            InstanceSnapshot::new()
+            properties: RbxInstanceProperties {
-                .class_name("OldClassName")
+                name: "OldName".to_owned(),
-                .name("OldName")
+                class_name: "OldClassName".to_owned(),
-                .property("Foo", 7i32)
+                properties: hashmap! {
-                .property("Bar", 3i32)
+                    "Foo".to_owned() => RbxValue::Int32 { value: 7 },
-                .property("Unchanged", -5i32),
+                    "Bar".to_owned() => RbxValue::Int32 { value: 3 },
-        );
+                    "Unchanged".to_owned() => RbxValue::Int32 { value: -5 },
+                },
+            },
+            metadata: Default::default(),
+        });
 
         let root_id = tree.get_root_id();
 
@@ -282,13 +303,13 @@ mod test {
             changed_class_name: Some("NewClassName".to_owned()),
             changed_properties: hashmap! {
                 // The value of Foo has changed
-                "Foo".to_owned() => Some(Variant::Int32(8)),
+                "Foo".to_owned() => Some(RbxValue::Int32 { value: 8 }),
 
                 // Bar has been deleted
                 "Bar".to_owned() => None,
 
                 // Baz has been added
-                "Baz".to_owned() => Some(Variant::Int32(10)),
+                "Baz".to_owned() => Some(RbxValue::Int32 { value: 10 }),
             },
             changed_metadata: None,
         };
@@ -301,9 +322,9 @@ mod test {
         apply_patch_set(&mut tree, patch_set);
 
         let expected_properties = hashmap! {
-            "Foo".to_owned() => Variant::Int32(8),
+            "Foo".to_owned() => RbxValue::Int32 { value: 8 },
-            "Baz".to_owned() => Variant::Int32(10),
+            "Baz".to_owned() => RbxValue::Int32 { value: 10 },
-            "Unchanged".to_owned() => Variant::Int32(-5),
+            "Unchanged".to_owned() => RbxValue::Int32 { value: -5 },
         };
 
         let root_instance = tree.get_instance(root_id).unwrap();

src/snapshot/patch_compute.rs

@@ -3,14 +3,14 @@
 
 use std::collections::{HashMap, HashSet};
 
-use rbx_dom_weak::types::{Ref, Variant};
+use rbx_dom_weak::{RbxId, RbxValue};
 
 use super::{
     patch::{PatchAdd, PatchSet, PatchUpdate},
     InstanceSnapshot, InstanceWithMeta, RojoTree,
 };
 
-pub fn compute_patch_set(snapshot: &InstanceSnapshot, tree: &RojoTree, id: Ref) -> PatchSet {
+pub fn compute_patch_set(snapshot: &InstanceSnapshot, tree: &RojoTree, id: RbxId) -> PatchSet {
     let mut patch_set = PatchSet::new();
     let mut context = ComputePatchContext::default();
 
@@ -26,15 +26,17 @@ pub fn compute_patch_set(snapshot: &InstanceSnapshot, tree: &RojoTree, id: Ref)
 
 #[derive(Default)]
 struct ComputePatchContext {
-    snapshot_id_to_instance_id: HashMap<Ref, Ref>,
+    snapshot_id_to_instance_id: HashMap<RbxId, RbxId>,
 }
 
 fn rewrite_refs_in_updates(context: &ComputePatchContext, updates: &mut [PatchUpdate]) {
     for update in updates {
         for property_value in update.changed_properties.values_mut() {
-            if let Some(Variant::Ref(referent)) = property_value {
+            if let Some(RbxValue::Ref { value: Some(id) }) = property_value {
-                if let Some(&instance_ref) = context.snapshot_id_to_instance_id.get(referent) {
+                if let Some(&instance_id) = context.snapshot_id_to_instance_id.get(id) {
-                    *property_value = Some(Variant::Ref(instance_ref));
+                    *property_value = Some(RbxValue::Ref {
+                        value: Some(instance_id),
+                    });
                 }
             }
         }
@@ -49,9 +51,11 @@ fn rewrite_refs_in_additions(context: &ComputePatchContext, additions: &mut [Pat
 
 fn rewrite_refs_in_snapshot(context: &ComputePatchContext, snapshot: &mut InstanceSnapshot) {
     for property_value in snapshot.properties.values_mut() {
-        if let Variant::Ref(referent) = property_value {
+        if let RbxValue::Ref { value: Some(id) } = property_value {
-            if let Some(&instance_referent) = context.snapshot_id_to_instance_id.get(referent) {
+            if let Some(&instance_id) = context.snapshot_id_to_instance_id.get(id) {
-                *property_value = Variant::Ref(instance_referent);
+                *property_value = RbxValue::Ref {
+                    value: Some(instance_id),
+                };
             }
         }
     }
@@ -65,7 +69,7 @@ fn compute_patch_set_internal(
     context: &mut ComputePatchContext,
     snapshot: &InstanceSnapshot,
     tree: &RojoTree,
-    id: Ref,
+    id: RbxId,
     patch_set: &mut PatchSet,
 ) {
     if let Some(snapshot_id) = snapshot.snapshot_id {
@@ -150,7 +154,7 @@ fn compute_children_patches(
     context: &mut ComputePatchContext,
     snapshot: &InstanceSnapshot,
     tree: &RojoTree,
-    id: Ref,
+    id: RbxId,
     patch_set: &mut PatchSet,
 ) {
     let instance = tree
@@ -220,6 +224,9 @@ mod test {
     use std::borrow::Cow;
 
     use maplit::hashmap;
+    use rbx_dom_weak::RbxInstanceProperties;
+
+    use super::super::InstancePropertiesWithMeta;
 
     /// This test makes sure that rewriting refs in instance update patches to
     /// instances that already exists works. We should be able to correlate the
@@ -227,17 +234,26 @@ mod test {
     /// value before returning from compute_patch_set.
     #[test]
     fn rewrite_ref_existing_instance_update() {
-        let tree = RojoTree::new(InstanceSnapshot::new().name("foo").class_name("foo"));
+        let tree = RojoTree::new(InstancePropertiesWithMeta {
+            properties: RbxInstanceProperties {
+                name: "foo".to_owned(),
+                class_name: "foo".to_owned(),
+                properties: HashMap::new(),
+            },
+            metadata: Default::default(),
+        });
 
         let root_id = tree.get_root_id();
 
         // This snapshot should be identical to the existing tree except for the
         // addition of a prop named Self, which is a self-referential Ref.
-        let snapshot_id = Ref::new();
+        let snapshot_id = RbxId::new();
         let snapshot = InstanceSnapshot {
             snapshot_id: Some(snapshot_id),
             properties: hashmap! {
-                "Self".to_owned() => Variant::Ref(snapshot_id),
+                "Self".to_owned() => RbxValue::Ref {
+                    value: Some(snapshot_id),
+                }
             },
 
             metadata: Default::default(),
@@ -254,7 +270,9 @@ mod test {
                 changed_name: None,
                 changed_class_name: None,
                 changed_properties: hashmap! {
-                    "Self".to_owned() => Some(Variant::Ref(root_id)),
+                    "Self".to_owned() => Some(RbxValue::Ref {
+                        value: Some(root_id),
+                    }),
                 },
                 changed_metadata: None,
             }],
@@ -270,17 +288,26 @@ mod test {
     /// one.
     #[test]
     fn rewrite_ref_existing_instance_addition() {
-        let tree = RojoTree::new(InstanceSnapshot::new().name("foo").class_name("foo"));
+        let tree = RojoTree::new(InstancePropertiesWithMeta {
+            properties: RbxInstanceProperties {
+                name: "foo".to_owned(),
+                class_name: "foo".to_owned(),
+                properties: HashMap::new(),
+            },
+            metadata: Default::default(),
+        });
 
         let root_id = tree.get_root_id();
 
         // This patch describes the existing instance with a new child added.
-        let snapshot_id = Ref::new();
+        let snapshot_id = RbxId::new();
         let snapshot = InstanceSnapshot {
             snapshot_id: Some(snapshot_id),
             children: vec![InstanceSnapshot {
                 properties: hashmap! {
-                    "Self".to_owned() => Variant::Ref(snapshot_id),
+                    "Self".to_owned() => RbxValue::Ref {
+                        value: Some(snapshot_id),
+                    },
                 },
 
                 snapshot_id: None,
@@ -305,7 +332,9 @@ mod test {
                     snapshot_id: None,
                     metadata: Default::default(),
                     properties: hashmap! {
-                        "Self".to_owned() => Variant::Ref(root_id),
+                        "Self".to_owned() => RbxValue::Ref {
+                            value: Some(root_id),
+                        },
                     },
                     name: Cow::Borrowed("child"),
                     class_name: Cow::Borrowed("child"),

src/snapshot/tests/apply.rs

@@ -1,10 +1,11 @@
 use insta::assert_yaml_snapshot;
 use maplit::hashmap;
+use rbx_dom_weak::{RbxInstanceProperties, RbxValue};
 
 use rojo_insta_ext::RedactionMap;
 
 use crate::{
-    snapshot::{apply_patch_set, InstanceSnapshot, PatchSet, PatchUpdate, RojoTree},
+    snapshot::{apply_patch_set, InstancePropertiesWithMeta, PatchSet, PatchUpdate, RojoTree},
     tree_view::{intern_tree, view_tree},
 };
 
@@ -48,7 +49,9 @@ fn add_property() {
             changed_name: None,
             changed_class_name: None,
             changed_properties: hashmap! {
-                "Foo".to_owned() => Some("Value of Foo".into()),
+                "Foo".to_owned() => Some(RbxValue::String {
+                    value: "Value of Foo".to_owned(),
+                }),
             },
             changed_metadata: None,
         }],
@@ -75,9 +78,12 @@ fn remove_property() {
         let root_id = tree.get_root_id();
         let mut root_instance = tree.get_instance_mut(root_id).unwrap();
 
-        root_instance
+        root_instance.properties_mut().insert(
-            .properties_mut()
+            "Foo".to_owned(),
-            .insert("Foo".to_owned(), "Should be removed".into());
+            RbxValue::String {
+                value: "Should be removed".to_owned(),
+            },
+        );
     }
 
     let tree_view = view_tree(&tree, &mut redactions);
@@ -106,5 +112,12 @@ fn remove_property() {
 }
 
 fn empty_tree() -> RojoTree {
-    RojoTree::new(InstanceSnapshot::new().name("ROOT").class_name("ROOT"))
+    RojoTree::new(InstancePropertiesWithMeta {
+        properties: RbxInstanceProperties {
+            name: "ROOT".to_owned(),
+            class_name: "ROOT".to_owned(),
+            properties: Default::default(),
+        },
+        metadata: Default::default(),
+    })
 }

src/snapshot/tests/compute.rs

@@ -2,10 +2,11 @@ use std::borrow::Cow;
 
 use insta::assert_yaml_snapshot;
 use maplit::hashmap;
+use rbx_dom_weak::{RbxInstanceProperties, RbxValue};
 
 use rojo_insta_ext::RedactionMap;
 
-use crate::snapshot::{compute_patch_set, InstanceSnapshot, RojoTree};
+use crate::snapshot::{compute_patch_set, InstancePropertiesWithMeta, InstanceSnapshot, RojoTree};
 
 #[test]
 fn set_name_and_class_name() {
@@ -42,7 +43,9 @@ fn set_property() {
         name: Cow::Borrowed("ROOT"),
         class_name: Cow::Borrowed("ROOT"),
         properties: hashmap! {
-            "PropertyName".to_owned() => "Hello, world!".into(),
+            "PropertyName".to_owned() => RbxValue::String {
+                value: "Hello, world!".to_owned(),
+            },
         },
         children: Vec::new(),
     };
@@ -65,7 +68,9 @@ fn remove_property() {
         let mut root_instance = tree.get_instance_mut(root_id).unwrap();
         root_instance.properties_mut().insert(
             "Foo".to_owned(),
-            "This should be removed by the patch.".into(),
+            RbxValue::String {
+                value: "This should be removed by the patch.".to_owned(),
+            },
         );
     }
 
@@ -123,8 +128,15 @@ fn remove_child() {
     {
         let root_id = tree.get_root_id();
         let new_id = tree.insert_instance(
+            InstancePropertiesWithMeta {
+                properties: RbxInstanceProperties {
+                    name: "Should not appear in snapshot".to_owned(),
+                    class_name: "Folder".to_owned(),
+                    properties: Default::default(),
+                },
+                metadata: Default::default(),
+            },
             root_id,
-            InstanceSnapshot::new().name("Should not appear in snapshot"),
         );
 
         redactions.intern(new_id);
@@ -146,5 +158,12 @@ fn remove_child() {
 }
 
 fn empty_tree() -> RojoTree {
-    RojoTree::new(InstanceSnapshot::new().name("ROOT").class_name("ROOT"))
+    RojoTree::new(InstancePropertiesWithMeta {
+        properties: RbxInstanceProperties {
+            name: "ROOT".to_owned(),
+            class_name: "ROOT".to_owned(),
+            properties: Default::default(),
+        },
+        metadata: Default::default(),
+    })
 }

src/snapshot/tests/snapshots/librojo__snapshot__tests__apply__add_property-2.snap

@@ -1,7 +1,6 @@
 ---
 source: src/snapshot/tests/apply.rs
 expression: applied_patch_value
-
 ---
 removed: []
 added: []
@@ -11,6 +10,6 @@ updated:
     changed_class_name: ~
     changed_properties:
       Foo:
-        String: Value of Foo
+        Type: String
+        Value: Value of Foo
     changed_metadata: ~
-

src/snapshot/tests/snapshots/librojo__snapshot__tests__apply__add_property.snap

@@ -1,17 +1,16 @@
 ---
 source: src/snapshot/tests/apply.rs
 expression: tree_view
-
 ---
 id: id-1
 name: ROOT
 class_name: ROOT
 properties:
   Foo:
-    String: Value of Foo
+    Type: String
+    Value: Value of Foo
 metadata:
   ignore_unknown_instances: false
   relevant_paths: []
   context: {}
 children: []
-

src/snapshot/tests/snapshots/librojo__snapshot__tests__apply__remove_property_initial.snap

@@ -1,17 +1,16 @@
 ---
 source: src/snapshot/tests/apply.rs
 expression: tree_view
-
 ---
 id: id-1
 name: ROOT
 class_name: ROOT
 properties:
   Foo:
-    String: Should be removed
+    Type: String
+    Value: Should be removed
 metadata:
   ignore_unknown_instances: false
   relevant_paths: []
   context: {}
 children: []
-

src/snapshot/tests/snapshots/librojo__snapshot__tests__compute__set_property.snap

@@ -1,7 +1,6 @@
 ---
 source: src/snapshot/tests/compute.rs
 expression: patch_value
-
 ---
 removed_instances: []
 added_instances: []
@@ -11,6 +10,6 @@ updated_instances:
     changed_class_name: ~
     changed_properties:
       PropertyName:
-        String: "Hello, world!"
+        Type: String
+        Value: "Hello, world!"
     changed_metadata: ~
-

src/snapshot/tree.rs

@@ -1,29 +1,26 @@
 use std::{
-    collections::{HashMap, VecDeque},
+    collections::HashMap,
     path::{Path, PathBuf},
 };
 
-use rbx_dom_weak::{
+use rbx_dom_weak::{Descendants, RbxId, RbxInstance, RbxInstanceProperties, RbxTree, RbxValue};
-    types::{Ref, Variant},
-    Instance, InstanceBuilder, WeakDom,
-};
 
 use crate::multimap::MultiMap;
 
-use super::{InstanceMetadata, InstanceSnapshot};
+use super::InstanceMetadata;
 
-/// An expanded variant of rbx_dom_weak's `WeakDom` that tracks additional
+/// An expanded variant of rbx_dom_weak's `RbxTree` that tracks additional
 /// metadata per instance that's Rojo-specific.
 ///
 /// This tree is also optimized for doing fast incremental updates and patches.
 #[derive(Debug)]
 pub struct RojoTree {
     /// Contains the instances without their Rojo-specific metadata.
-    inner: WeakDom,
+    inner: RbxTree,
 
     /// Metadata associated with each instance that is kept up-to-date with the
     /// set of actual instances.
-    metadata_map: HashMap<Ref, InstanceMetadata>,
+    metadata_map: HashMap<RbxId, InstanceMetadata>,
 
     /// A multimap from source paths to all of the root instances that were
     /// constructed from that path.
@@ -32,42 +29,31 @@ pub struct RojoTree {
     /// value portion of the map is also a set in order to support the same path
     /// appearing multiple times in the same Rojo project. This is sometimes
     /// called "path aliasing" in various Rojo documentation.
-    path_to_ids: MultiMap<PathBuf, Ref>,
+    path_to_ids: MultiMap<PathBuf, RbxId>,
 }
 
 impl RojoTree {
-    pub fn new(snapshot: InstanceSnapshot) -> RojoTree {
+    pub fn new(root: InstancePropertiesWithMeta) -> RojoTree {
-        let root_builder = InstanceBuilder::new(snapshot.class_name.to_owned())
-            .with_name(snapshot.name.to_owned())
-            .with_properties(snapshot.properties);
-
         let mut tree = RojoTree {
-            inner: WeakDom::new(root_builder),
+            inner: RbxTree::new(root.properties),
             metadata_map: HashMap::new(),
             path_to_ids: MultiMap::new(),
         };
 
-        let root_ref = tree.inner.root_ref();
+        tree.insert_metadata(tree.inner.get_root_id(), root.metadata);
-
-        tree.insert_metadata(root_ref, snapshot.metadata);
-
-        for child in snapshot.children {
-            tree.insert_instance(root_ref, child);
-        }
-
         tree
     }
 
-    pub fn inner(&self) -> &WeakDom {
+    pub fn inner(&self) -> &RbxTree {
         &self.inner
     }
 
-    pub fn get_root_id(&self) -> Ref {
+    pub fn get_root_id(&self) -> RbxId {
-        self.inner.root_ref()
+        self.inner.get_root_id()
     }
 
-    pub fn get_instance(&self, id: Ref) -> Option<InstanceWithMeta> {
+    pub fn get_instance(&self, id: RbxId) -> Option<InstanceWithMeta> {
-        if let Some(instance) = self.inner.get_by_ref(id) {
+        if let Some(instance) = self.inner.get_instance(id) {
             let metadata = self.metadata_map.get(&id).unwrap();
 
             Some(InstanceWithMeta { instance, metadata })
@@ -76,8 +62,8 @@ impl RojoTree {
         }
     }
 
-    pub fn get_instance_mut(&mut self, id: Ref) -> Option<InstanceWithMetaMut> {
+    pub fn get_instance_mut(&mut self, id: RbxId) -> Option<InstanceWithMetaMut> {
-        if let Some(instance) = self.inner.get_by_ref_mut(id) {
+        if let Some(instance) = self.inner.get_instance_mut(id) {
             let metadata = self.metadata_map.get_mut(&id).unwrap();
 
             Some(InstanceWithMetaMut { instance, metadata })
@@ -86,38 +72,38 @@ impl RojoTree {
         }
     }
 
-    pub fn insert_instance(&mut self, parent_ref: Ref, snapshot: InstanceSnapshot) -> Ref {
+    pub fn insert_instance(
-        let builder = InstanceBuilder::new(snapshot.class_name.to_owned())
+        &mut self,
-            .with_name(snapshot.name.to_owned())
+        properties: InstancePropertiesWithMeta,
-            .with_properties(snapshot.properties);
+        parent_id: RbxId,
-
+    ) -> RbxId {
-        let referent = self.inner.insert(parent_ref, builder);
+        let id = self.inner.insert_instance(properties.properties, parent_id);
-        self.insert_metadata(referent, snapshot.metadata);
+        self.insert_metadata(id, properties.metadata);
-
+        id
-        for child in snapshot.children {
-            self.insert_instance(referent, child);
-        }
-
-        referent
     }
 
-    pub fn remove(&mut self, id: Ref) {
+    pub fn remove_instance(&mut self, id: RbxId) -> Option<RojoTree> {
-        let mut to_move = VecDeque::new();
+        if let Some(inner) = self.inner.remove_instance(id) {
-        to_move.push_back(id);
+            let mut metadata_map = HashMap::new();
+            let mut path_to_ids = MultiMap::new();
 
-        while let Some(id) = to_move.pop_front() {
+            self.move_metadata(id, &mut metadata_map, &mut path_to_ids);
-            self.remove_metadata(id);
+            for instance in inner.descendants(id) {
-
+                self.move_metadata(instance.get_id(), &mut metadata_map, &mut path_to_ids);
-            if let Some(instance) = self.inner.get_by_ref(id) {
-                to_move.extend(instance.children().iter().copied());
             }
-        }
 
-        self.inner.destroy(id);
+            Some(RojoTree {
+                inner,
+                metadata_map,
+                path_to_ids,
+            })
+        } else {
+            None
+        }
     }
 
     /// Replaces the metadata associated with the given instance ID.
-    pub fn update_metadata(&mut self, id: Ref, metadata: InstanceMetadata) {
+    pub fn update_metadata(&mut self, id: RbxId, metadata: InstanceMetadata) {
         use std::collections::hash_map::Entry;
 
         match self.metadata_map.entry(id) {
@@ -145,22 +131,22 @@ impl RojoTree {
         }
     }
 
-    pub fn descendants(&self, id: Ref) -> RojoDescendants<'_> {
+    pub fn descendants(&self, id: RbxId) -> RojoDescendants<'_> {
-        let mut queue = VecDeque::new();
+        RojoDescendants {
-        queue.push_back(id);
+            inner: self.inner.descendants(id),
-
+            tree: self,
-        RojoDescendants { queue, tree: self }
+        }
     }
 
-    pub fn get_ids_at_path(&self, path: &Path) -> &[Ref] {
+    pub fn get_ids_at_path(&self, path: &Path) -> &[RbxId] {
         self.path_to_ids.get(path)
     }
 
-    pub fn get_metadata(&self, id: Ref) -> Option<&InstanceMetadata> {
+    pub fn get_metadata(&self, id: RbxId) -> Option<&InstanceMetadata> {
         self.metadata_map.get(&id)
     }
 
-    fn insert_metadata(&mut self, id: Ref, metadata: InstanceMetadata) {
+    fn insert_metadata(&mut self, id: RbxId, metadata: InstanceMetadata) {
         for path in &metadata.relevant_paths {
             self.path_to_ids.insert(path.clone(), id);
         }
@@ -170,17 +156,25 @@ impl RojoTree {
 
     /// Moves the Rojo metadata from the instance with the given ID from this
     /// tree into some loose maps.
-    fn remove_metadata(&mut self, id: Ref) {
+    fn move_metadata(
+        &mut self,
+        id: RbxId,
+        metadata_map: &mut HashMap<RbxId, InstanceMetadata>,
+        path_to_ids: &mut MultiMap<PathBuf, RbxId>,
+    ) {
         let metadata = self.metadata_map.remove(&id).unwrap();
 
         for path in &metadata.relevant_paths {
             self.path_to_ids.remove(path, id);
+            path_to_ids.insert(path.clone(), id);
         }
+
+        metadata_map.insert(id, metadata);
     }
 }
 
 pub struct RojoDescendants<'a> {
-    queue: VecDeque<Ref>,
+    inner: Descendants<'a>,
     tree: &'a RojoTree,
 }
 
@@ -188,43 +182,50 @@ impl<'a> Iterator for RojoDescendants<'a> {
     type Item = InstanceWithMeta<'a>;
 
     fn next(&mut self) -> Option<Self::Item> {
-        let id = self.queue.pop_front()?;
+        let instance = self.inner.next()?;
-
-        let instance = self
-            .tree
-            .inner
-            .get_by_ref(id)
-            .expect("Instance did not exist");
-
         let metadata = self
             .tree
-            .get_metadata(instance.referent())
+            .get_metadata(instance.get_id())
             .expect("Metadata did not exist for instance");
 
-        self.queue.extend(instance.children().iter().copied());
-
         Some(InstanceWithMeta { instance, metadata })
     }
 }
 
-/// RojoTree's equivalent of `&'a Instance`.
+/// RojoTree's equivalent of `RbxInstanceProperties`.
+#[derive(Debug, Clone)]
+pub struct InstancePropertiesWithMeta {
+    pub properties: RbxInstanceProperties,
+    pub metadata: InstanceMetadata,
+}
+
+impl InstancePropertiesWithMeta {
+    pub fn new(properties: RbxInstanceProperties, metadata: InstanceMetadata) -> Self {
+        InstancePropertiesWithMeta {
+            properties,
+            metadata,
+        }
+    }
+}
+
+/// RojoTree's equivalent of `&'a RbxInstance`.
 ///
 /// This has to be a value type for RojoTree because the instance and metadata
 /// are stored in different places. The mutable equivalent is
 /// `InstanceWithMetaMut`.
 #[derive(Debug, Clone, Copy)]
 pub struct InstanceWithMeta<'a> {
-    instance: &'a Instance,
+    instance: &'a RbxInstance,
     metadata: &'a InstanceMetadata,
 }
 
 impl<'a> InstanceWithMeta<'a> {
-    pub fn id(&self) -> Ref {
+    pub fn id(&self) -> RbxId {
-        self.instance.referent()
+        self.instance.get_id()
     }
 
-    pub fn parent(&self) -> Ref {
+    pub fn parent(&self) -> Option<RbxId> {
-        self.instance.parent()
+        self.instance.get_parent_id()
     }
 
     pub fn name(&self) -> &'a str {
@@ -232,15 +233,15 @@ impl<'a> InstanceWithMeta<'a> {
     }
 
     pub fn class_name(&self) -> &'a str {
-        &self.instance.class
+        &self.instance.class_name
     }
 
-    pub fn properties(&self) -> &'a HashMap<String, Variant> {
+    pub fn properties(&self) -> &'a HashMap<String, RbxValue> {
         &self.instance.properties
     }
 
-    pub fn children(&self) -> &'a [Ref] {
+    pub fn children(&self) -> &'a [RbxId] {
-        self.instance.children()
+        self.instance.get_children_ids()
     }
 
     pub fn metadata(&self) -> &'a InstanceMetadata {
@@ -248,20 +249,20 @@ impl<'a> InstanceWithMeta<'a> {
     }
 }
 
-/// RojoTree's equivalent of `&'a mut Instance`.
+/// RojoTree's equivalent of `&'a mut RbxInstance`.
 ///
 /// This has to be a value type for RojoTree because the instance and metadata
 /// are stored in different places. The immutable equivalent is
 /// `InstanceWithMeta`.
 #[derive(Debug)]
 pub struct InstanceWithMetaMut<'a> {
-    instance: &'a mut Instance,
+    instance: &'a mut RbxInstance,
     metadata: &'a mut InstanceMetadata,
 }
 
 impl InstanceWithMetaMut<'_> {
-    pub fn id(&self) -> Ref {
+    pub fn id(&self) -> RbxId {
-        self.instance.referent()
+        self.instance.get_id()
     }
 
     pub fn name(&self) -> &str {
@@ -273,23 +274,23 @@ impl InstanceWithMetaMut<'_> {
     }
 
     pub fn class_name(&self) -> &str {
-        &self.instance.class
+        &self.instance.class_name
     }
 
     pub fn class_name_mut(&mut self) -> &mut String {
-        &mut self.instance.class
+        &mut self.instance.class_name
     }
 
-    pub fn properties(&self) -> &HashMap<String, Variant> {
+    pub fn properties(&self) -> &HashMap<String, RbxValue> {
         &self.instance.properties
     }
 
-    pub fn properties_mut(&mut self) -> &mut HashMap<String, Variant> {
+    pub fn properties_mut(&mut self) -> &mut HashMap<String, RbxValue> {
         &mut self.instance.properties
     }
 
-    pub fn children(&self) -> &[Ref] {
+    pub fn children(&self) -> &[RbxId] {
-        self.instance.children()
+        self.instance.get_children_ids()
     }
 
     pub fn metadata(&self) -> &InstanceMetadata {

src/snapshot_middleware/csv.rs

@@ -3,6 +3,7 @@ use std::{collections::BTreeMap, path::Path};
 use anyhow::Context;
 use maplit::hashmap;
 use memofs::{IoResultExt, Vfs};
+use rbx_dom_weak::RbxValue;
 use serde::Serialize;
 
 use crate::snapshot::{InstanceContext, InstanceMetadata, InstanceSnapshot};
@@ -29,7 +30,9 @@ pub fn snapshot_csv(
         .name(instance_name)
         .class_name("LocalizationTable")
         .properties(hashmap! {
-            "Contents".to_owned() => table_contents.into(),
+            "Contents".to_owned() => RbxValue::String {
+                value: table_contents,
+            },
         })
         .metadata(
             InstanceMetadata::new()
@@ -38,8 +41,8 @@ pub fn snapshot_csv(
         );
 
     if let Some(meta_contents) = vfs.read(&meta_path).with_not_found()? {
-        let mut metadata = AdjacentMetadata::from_slice(&meta_contents, meta_path)?;
+        let mut metadata = AdjacentMetadata::from_slice(&meta_contents, &meta_path)?;
-        metadata.apply_all(&mut snapshot)?;
+        metadata.apply_all(&mut snapshot);
     }
 
     Ok(Some(snapshot))

src/snapshot_middleware/dir.rs

@@ -60,8 +60,8 @@ pub fn snapshot_dir(context: &InstanceContext, vfs: &Vfs, path: &Path) -> Snapsh
         );
 
     if let Some(meta_contents) = vfs.read(&meta_path).with_not_found()? {
-        let mut metadata = DirectoryMetadata::from_slice(&meta_contents, meta_path)?;
+        let mut metadata = DirectoryMetadata::from_slice(&meta_contents, &meta_path)?;
-        metadata.apply_all(&mut snapshot)?;
+        metadata.apply_all(&mut snapshot);
     }
 
     Ok(Some(snapshot))

src/snapshot_middleware/json.rs

@@ -3,6 +3,7 @@ use std::path::Path;
 use anyhow::Context;
 use maplit::hashmap;
 use memofs::{IoResultExt, Vfs};
+use rbx_dom_weak::RbxValue;
 
 use crate::{
     lua_ast::{Expression, Statement},
@@ -25,7 +26,9 @@ pub fn snapshot_json(
     let as_lua = json_to_lua(value).to_string();
 
     let properties = hashmap! {
-        "Source".to_owned() => as_lua.into(),
+        "Source".to_owned() => RbxValue::String {
+            value: as_lua,
+        },
     };
 
     let meta_path = path.with_file_name(format!("{}.meta.json", instance_name));
@@ -42,8 +45,8 @@ pub fn snapshot_json(
         );
 
     if let Some(meta_contents) = vfs.read(&meta_path).with_not_found()? {
-        let mut metadata = AdjacentMetadata::from_slice(&meta_contents, meta_path)?;
+        let mut metadata = AdjacentMetadata::from_slice(&meta_contents, &meta_path)?;
-        metadata.apply_all(&mut snapshot)?;
+        metadata.apply_all(&mut snapshot);
     }
 
     Ok(Some(snapshot))