vite-plugin-checker/dist/checkers/tscUtils.js

Vite plugin that runs TypeScript type checker on a separate process.

//#region src/checkers/tscUtils.ts
/**
* Wrap a `SolutionBuilderWithWatchHost` so that when a referenced project's
* tsconfig fails to parse, we force `compilerOptions.noEmit` to `true` instead
* of letting TS fall back to defaults (which include `noEmit: false`).
*
* `createSolutionBuilderWithWatch` takes its emit decisions from each referenced
* project's own `compilerOptions`. If a referenced tsconfig is truncated or
* mid-write at the moment TS reads it (which can happen e.g. when a dev tool
* rewrites tsconfigs at runtime), TS falls back to default options — and the
* default is `noEmit: false`, so the build host writes `.js` files next to
* sources. See https://github.com/nuxt/nuxt/issues/32872.
*
* We deliberately only override when parsing produced errors: forcing
* `noEmit: true` on every parsed project would break valid `tsc --build`
* graphs, since composite referenced projects must emit declarations.
*/
function forceNoEmitOnSolutionBuilderHost(ts, host) {
	const parseConfigHost = {
		useCaseSensitiveFileNames: ts.sys.useCaseSensitiveFileNames,
		readDirectory: ts.sys.readDirectory,
		fileExists: ts.sys.fileExists,
		readFile: ts.sys.readFile,
		getCurrentDirectory: ts.sys.getCurrentDirectory,
		onUnRecoverableConfigFileDiagnostic: () => {}
	};
	const original = host.getParsedCommandLine?.bind(host);
	host.getParsedCommandLine = (fileName) => {
		const parsed = original ? original(fileName) : ts.getParsedCommandLineOfConfigFile(fileName, { tscBuild: true }, parseConfigHost);
		if (parsed && parsed.errors.length > 0) parsed.options.noEmit = true;
		return parsed;
	};
	return host;
}
//#endregion
export { forceNoEmitOnSolutionBuilderHost };

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