Function runCatFile

packages/computer/src/git/cli.ts:1776–1816

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

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

async function runCatFile(
  client: GitClient,
  args: string[],
  input: GitCliInput,
): Promise<GitCliResult> {
  // `git cat-file -p <oid>` -- pretty-print the object's raw
  // bytes to stdout. Other forms (`-t`, `-s`) are out of scope.
  const parsed = parseFlags(args, {
    p: { kind: "bool" },
  });
  if ("error" in parsed) {
    return { stdout: "", stderr: `git cat-file: ${parsed.error}\n`, exitCode: 129 };
  }
  if (parsed.flags.p !== true) {
    return {
      stdout: "",
      stderr: "git cat-file: only -p is supported\n",
      exitCode: 129,
    };
  }
  if (parsed.positional.length !== 1) {
    return {
      stdout: "",
      stderr: "git cat-file: usage: git cat-file -p <oid>[:<path>]\n",
      exitCode: 129,
    };
  }
  // Support the <oid>:<path> shorthand for tree subreads.
  const spec = parsed.positional[0];
  const colon = spec.indexOf(":");
  const oid = colon === -1 ? spec : spec.slice(0, colon);
  const filepath = colon === -1 ? undefined : spec.slice(colon + 1);
  const dir = resolveDir(undefined, input.cwd);
  try {
    const result = await client.catFile({ dir, oid, filepath });
    const text = new TextDecoder("utf-8", { fatal: false }).decode(result.bytes);
    return { stdout: text, stderr: "", exitCode: 0 };
  } catch (cause) {
    return mapGitError("cat-file", cause);
  }
}

// ---------------------------------------------------------------
// update-ref