Function getShellEnvironment

src/main/lib/git/shell-env.ts:74–162

()

 * Results are cached for 1 minute to avoid repeated operations.
 */
export async function getShellEnvironment(): Promise<Record<string, string>> {
	const now = Date.now();
	const ttl = isFallbackCache ? FALLBACK_CACHE_TTL_MS : CACHE_TTL_MS;
	if (cachedEnv && now - cacheTime < ttl) {
		// Return a copy to prevent caller mutations from corrupting cache
		return { ...cachedEnv };
	}

	// Windows: derive PATH without shell invocation
	// Git Bash PATH doesn't include Windows user paths, so we build it manually
	if (process.platform === "win32") {
		console.log(
			"[shell-env] Windows detected, deriving PATH without shell invocation",
		);
		const env: Record<string, string> = {
			...process.env,
			PATH: buildWindowsPath(),
			HOME: os.homedir(),
			USER: os.userInfo().username,
			USERPROFILE: os.homedir(),
		};

		// Ensure all values are strings
		const stringEnv: Record<string, string> = {};
		for (const [key, value] of Object.entries(env)) {
			if (typeof value === "string") {
				stringEnv[key] = value;
			}
		}

		cachedEnv = stringEnv;
		cacheTime = now;
		isFallbackCache = false;
		console.log(
			`[shell-env] Built Windows environment with ${Object.keys(stringEnv).length} vars`,
		);
		return { ...stringEnv };
	}

	// macOS/Linux: spawn login shell to get full environment
	const shell =
		process.env.SHELL ||
		(process.platform === "darwin" ? "/bin/zsh" : "/bin/bash");

	try {
		// Use -lc flags (not -ilc):
		// -l: login shell (sources .zprofile/.profile for PATH setup)
		// -c: execute command
		// Avoids -i (interactive) to skip TTY prompts and reduce latency
		const { stdout } = await execFileAsync(shell, ["-lc", "env"], {
			timeout: 10_000,
			env: {
				...process.env,
				HOME: os.homedir(),
			},
		});

		const env: Record<string, string> = {};