Manifest Controller

This controller handles acquiring the various manifests and other relevant data required to install and launch the game.

Most projects will not need this controller directly. installGame calls it for you.

Functions

getCEObject (installObject)

Parameters:

• installObject: An object in the following format

{
  "version": "1.20.1",
  "loader": "forge",
  "lv": "release"
}

• version: Game Version
• loader: Game Loader (vanilla, forge, fabric or neoforge)
• lv: Loader Version. Use release for the recommended version

This function downloads the version spec from the resource server (RESOURCE_SERVER), along with the JVM, asset and library manifests, and converts them into a single CE Object.

The CE Object is cached in versions/<id>/version.ce in the Cauldron folder. If a matching cache is found it is returned without being rebuilt.

If the client is offline and no offline copy is found, the following error will occur.

This Profile Cannot be launched offline. Please Launch it Online first

If the version (or loader version) cannot be found, the following error will occur.

This Profile either does not exist or is not supported

whatIsThis (version, vanillaManifest)

Parameters:

• version: Game Version or alias
• vanillaManifest: Mojang’s version manifest

This function resolves version aliases.

• release / latest: Returns the latest release
• snapshot: Returns the latest snapshot
• Anything else is returned unchanged

Appendix

CE Object

{
  "libList": "Array of library paths to add to the classpath (Array)",
  "nativeList": "Array of native jar paths to extract (Array)",
  "loggingInfo": "Logging config file information (Object)",
  "installQueue": "Every file required for the installation in queue format (Array)",
  "jreVersion": "JVM Version Name (String)",
  "specPath": "Path of the version spec relative to the Cauldron folder (String)",
  "vanillaVersion": "Minecraft Version (String)",
  "loader": "Current Loader (String)",
  "lv": "Loader Version (String)",
  "specName": "Version ID (String)",
  "post": "Post processing data, or false if not required"
}

installQueue uses the queue format.

Folder Layout

Files are stored in the Cauldron folder (see grabPath).

Folder	Contents
versions/<id>	Version spec, client jar and version.ce cache
jvm/<name>	Java runtimes
assets/objects	Assets (1.7.3 and above)
assets/virtual/legacy	Legacy assets (1.6 to 1.7.2)
resources	Pre-1.6 assets
assets/log_configs	Logging configs
libraries	Libraries