rojo/docs/sync-details.md

This page aims to describe how Rojo turns files on the filesystem into Roblox objects.

Overview

File Name	Instance Type
any directory	Folder
*.server.lua	Script
*.client.lua	LocalScript
*.lua	ModuleScript
*.csv	LocalizationTable
*.txt	StringValue
*.model.json	Any
*.rbxm	Any
*.rbxmx	Any

Limitations

Not all property types can be synced by Rojo in real-time due to limitations of the Roblox Studio plugin API. In these cases, you can usually generate a place file and open it when you start working on a project.

Some common cases you might hit are:

• Binary data (Terrain, CSG, CollectionService tags)
• MeshPart.MeshId
• HttpService.HttpEnabled

For a list of all property types that Rojo can reason about, both when live-syncing and when building place files, look at rbx_tree's type coverage documentation.

Folders

Any directory on the filesystem will turn into a Folder instance unless it contains an 'init' script, described below.

Scripts

The default script type in Rojo projects is ModuleScript, since most scripts in well-structued Roblox projects will be modules.

If a directory contains a file named init.server.lua, init.client.lua, or init.lua, that folder will be transformed into a *Script instance with the contents of the 'init' file. This can be used to create scripts inside of scripts.

For example, these files:

Will turn into these instances in Roblox:

Localization Tables

Any CSV files are transformed into LocalizationTable instances. Rojo expects these files to follow the same format that Roblox does when importing and exporting localization information.

Plain Text Files

Plain text files (.txt) files are transformed into StringValue instances. This is useful for bringing in text data that can be read by scripts at runtime.

JSON Models

Files ending in .model.json can be used to describe simple models. They're designed to be hand-written and are useful for instances like RemoteEvent.

A JSON model describing a folder containing a Part and a RemoteEvent could be described as:

{
    "Name": "My Cool Model",
    "ClassName": "Folder",
    "Children": [
        {
            "Name": "RootPart",
            "ClassName": "Part",
            "Properties": {
                "Size": {
                    "Type": "Vector3",
                    "Value": [4, 4, 4]
                }
            }
        },
        {
            "Name": "SendMoney",
            "ClassName": "RemoteEvent"
        }
    ]
}

It would turn into instances in this shape:

Binary and XML Models

Rojo supports both binary (.rbxm) and XML (.rbxmx) models generated by Roblox Studio or another tool.

Not all property types are supported!

For a rundown of supported types, see:

• rbxm Type Coverage
• rbxmx Type Coverage