Function mapGitError

packages/computer/src/git/cli.ts:2129–2146

* Map a `GitError` subclass to the standard `git: ` * stderr framing and a deterministic exit code: * * NotARepositoryError, AlreadyInitializedError, * MissingIdentityError, PathOutsideRepoError, * PathspecNotFoundError -> 128 * any other GitError

(subcommand: string, cause: unknown)

 * errors and 1 for "command ran but didn't succeed".
 */
function mapGitError(subcommand: string, cause: unknown): GitCliResult {
  if (cause instanceof NotARepositoryError) {
    return makeStderr(subcommand, cause.message, 128);
  }
  if (cause instanceof AlreadyInitializedError) {
    return makeStderr(subcommand, cause.message, 128);
  }
  if (cause instanceof MissingIdentityError) {
    return makeStderr(subcommand, cause.message, 128);
  }
  if (cause instanceof PathspecNotFoundError) {
    return makeStderr(subcommand, cause.message, 128);
  }
  if (cause instanceof GitError) {
    return makeStderr(subcommand, cause.message, 1);
  }
  return makeStderr(subcommand, errorMessage(cause), 1);
}

function makeStderr(subcommand: string, message: string, exitCode: number): GitCliResult {
  return { stdout: "", stderr: `git ${subcommand}: ${message}\n`, exitCode };