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AppState

Struct AppState 

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pub struct AppState;
Expand description

Zero-sized handle for the global launcher paths.

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impl AppState

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pub fn init(name: impl Into<String>) -> AppStateResult<()>

Initialises the global launcher paths. Call once at startup.

name becomes the per-launcher subdirectory under the OS- standard data/config/cache bases. Returns AppStateError::AlreadyInitialized on a second call.

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pub fn paths() -> &'static LauncherPaths

Returns the resolved launcher paths.

Panics with a clear message if Self::init hasn’t been called — that’s a programmer error, not a runtime condition.

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pub fn name() -> &'static str

Launcher name as supplied to Self::init.

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pub fn data_dir() -> &'static Path

Persistent data directory (instances live here).

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pub fn config_dir() -> &'static Path

User configuration directory (the bundled JRE lives here).

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pub fn cache_dir() -> &'static Path

Disposable cache directory.

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pub fn app_version() -> &'static str

Application version derived from CARGO_PKG_VERSION.

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pub fn client_id() -> &'static str

Per-install launcher client id, surfaced to the JVM as ${clientid}.

Persisted at <config_dir>/client_id so crash reports and Mojang telemetry stay correlated across sessions. On first call we read it from disk; on a missing/unreadable file we mint a fresh UUID v4 (RFC 4122) and write it back. Subsequent calls in the same process hit the in-memory cache.

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