Function runSwitch

packages/computer/src/git/cli.ts:1287–1326

(
  client: GitClient,
  args: string[],
  input: GitCliInput,
)

// ---------------------------------------------------------------

async function runSwitch(
  client: GitClient,
  args: string[],
  input: GitCliInput,
): Promise<GitCliResult> {
  // `git switch [-c <new>] <branch> [<start>]`. The modern
  // spelling of `checkout` for branch movement; `-c` is the
  // `checkout -b` equivalent.
  const parsed = parseFlags(args, {
    c: { kind: "bool" },
  });
  if ("error" in parsed) {
    return { stdout: "", stderr: `git switch: ${parsed.error}\n`, exitCode: 129 };
  }
  const dir = resolveDir(undefined, input.cwd);

  if (parsed.flags.c === true) {
    if (parsed.positional.length === 0) {
      return { stdout: "", stderr: "git switch: -c requires a branch name\n", exitCode: 129 };
    }
    return createAndSwitch(client, dir, parsed.positional[0], parsed.positional[1], "switch");
  }

  if (parsed.positional.length === 0) {
    return { stdout: "", stderr: "git switch: missing <branch>\n", exitCode: 129 };
  }
  if (parsed.positional.length > 1) {
    return {
      stdout: "",
      stderr: `git switch: unexpected argument '${parsed.positional[1]}'\n`,
      exitCode: 129,
    };
  }
  try {
    await client.checkout({ dir, ref: parsed.positional[0] });
    return { stdout: "", stderr: "", exitCode: 0 };
  } catch (cause) {
    return mapGitError("switch", cause);
  }
}

/**
 * Create a branch (optionally at a start point) and move HEAD to