Function applyLoginShellPath

packages/kaos/src/login-shell-path.ts:116–126

(deps: LoginShellPathDeps)

/** Probe the login shell and merge its PATH into `deps.env['PATH']`. */
export async function applyLoginShellPath(deps: LoginShellPathDeps): Promise<void> {
  const loginShellPath = await probeLoginShellPath(deps);
  if (loginShellPath === undefined) return;
  const currentPath = deps.env['PATH'];
  const merged = mergeLoginShellPath(currentPath, loginShellPath);
  // Only write when something was appended — an unset PATH must stay
  // unset (assigning '' would turn "implementation default search path"
  // into "cwd-only lookup"), and a set PATH must not be rewritten.
  if (merged === (currentPath ?? '')) return;
  deps.env['PATH'] = merged;
}

/**
 * Production convenience — apply the probe to `process.env` once per