Unreal Engine

An Unreal plugin stores its version in its .uplugin file. A project keeps its version in Config/DefaultGame.ini, and the Android store fields live in Config/DefaultEngine.ini. dispat reads and writes all of these files, and it reads the plugin graph declared by a .uproject.

The short version

Treat a repository of plugins as a standard workspace. Define your packages in dispat.json:

dispat.json

{
  "packages": {
    "acmenet": {"path": "Plugins/AcmeNet", "autoVersion": {"enabled": true}},
    "acmeui": {"path": "Plugins/AcmeUI", "autoVersion": {"enabled": true}}
  }
}

Place each .uplugin directly in its package folder so the default manifest scope finds it. Commit your changes and run dispat to bump the versions.

$ git commit -m "feat(acmenet): reliable RPC batching"
$ dispat
12:50:45 INF ● changed bump=minor package=acmenet version="1.2.0 -> 1.3.0"
12:50:45 INF manifest reconciled manifest=AcmeNet.uplugin package=acmenet ranges=0 stage=version version=1.3.0 versionWritten=true
12:50:45 INF published package=acmenet tag=acmenet@1.3.0 version=1.3.0

What dispat reads

*.uplugin

{
  "FileVersion": 3,
  "Version": 7,
  "VersionName": "1.2.0",
  "FriendlyName": "Acme Networking",
  "Plugins": [
    { "Name": "ChaosVehiclesPlugin", "Enabled": true }
  ]
}

Field	Read as	Written by
the file's own name	the package's name	never
VersionName	the version	--set-version, and auto-versioning
Version	the build counter	--set-build
Plugins[].Name	dependencies, with no version	never

dispat uses the file's base name as the package name instead of FriendlyName. Other descriptors reference the plugin by this base name, and it matches the folder on disk. A workspace resolves this name directly.

dispat writes Version back as a bare integer because the engine's build tool expects that format. If a descriptor already formats the version as a string, dispat keeps that shape. It avoids reformatting existing files.

*.uproject

{
  "FileVersion": 3,
  "EngineAssociation": "5.4",
  "Plugins": [
    { "Name": "AcmeNet", "Enabled": true }
  ]
}

A project descriptor declares no version of its own. It declares which plugins it enables, and dispat treats these as dependency edges. Release AcmeNet first, then release the project that uses it, which dispat compute suggests automatically.

Config/DefaultGame.ini and Config/DefaultEngine.ini

[/Script/EngineSettings.GeneralProjectSettings]
ProjectName=Acme Game
ProjectVersion=1.2.0.0

[/Script/AndroidRuntimeSettings.AndroidRuntimeSettings]
StoreVersion=7
VersionDisplayName=1.2.0

ProjectVersion sets the version a packaged game reports at runtime. VersionDisplayName controls what the Play Store listing shows. StoreVersion provides the integer Google Play uses to order uploads.

Unreal writes ProjectVersion with four components. dispat keeps whatever text you provide because the engine reads that exact text. Normalising the text would cause disagreements with the engine.

Put both files inside a Config/ folder so dispat recognises them. A DefaultEngine.ini anywhere else acts as configuration, not a manifest.

Plugins have no versions, and that is fine

An Unreal descriptor names a plugin and stops there:

"Plugins": [{ "Name": "AcmeNet", "Enabled": true }]

The descriptor lacks version text because the engine resolves a plugin by name against the project and the engine itself. Ask dispat to write a version range for a plugin, and it reports the file as skipped, not missing:

$ dispat writer --set AcmeNet=1.3.0 Server.uproject
Server.uproject
1 manifest(s): 0 applied, 1 skipped, 0 missing

A skipped dependency exists but carries no version text for a writer to change. A missing dependency means the file does not declare it at all, creating a disagreement that fails a --strict run. Every healthy Unreal descriptor stays permanently in the skipped state, so warnings here would create noise.

A disabled plugin remains declared and still acts as a dependency edge. A build that turns the plugin back on requires a released version.

Build numbers for the stores

$ dispat writer --set-build "$GITHUB_RUN_NUMBER" \
    Plugins/AcmeNet/AcmeNet.uplugin \
    Config/DefaultEngine.ini

Run this command to bump the plugin's Version and the Android StoreVersion without changing any version strings. Both fields require integers. dispat refuses a version string before it even opens the file.

What dispat leaves alone

EngineAssociation pins the engine a project builds against. This represents a toolchain choice rather than a shipped artifact. dispat never reads or writes it, just as it ignores a Maven parent version.

*.Build.cs and *.Target.cs declare module dependencies in C#. dispat ignores them because they are source files, not manifests.

An array operation like +ProjectVersion= or .ProjectVersion= acts as a different declaration from a plain assignment. Unreal resolves the two differently. dispat writes the plain assignment and leaves the array operations alone.

The folders dispat stays out of

The Binaries, Intermediate, Saved, and DerivedDataCache folders hold generated copies of the descriptors. dispat never descends into any of them.

Where to go next

• Read Games for a repository that grows past one project.
• Check Unity and Godot for other game engines.
• Use compute to turn the plugin graph into configuration.