Function isRepoShallow

packages/git/src/index.ts:139–168

({ cwd }: { cwd: string })

}

export async function isRepoShallow({ cwd }: { cwd: string }) {
  const isShallowRepoOutput = (
    await spawn("git", ["rev-parse", "--is-shallow-repository"], {
      cwd,
    })
  ).stdout
    .toString()
    .trim();

  if (isShallowRepoOutput === "--is-shallow-repository") {
    // We have an old version of Git (<2.15) which doesn't support `rev-parse --is-shallow-repository`
    // In that case, we'll test for the existence of .git/shallow.

    // Firstly, find the .git folder for the repo; note that this will be relative to the repo dir
    const gitDir = (
      await spawn("git", ["rev-parse", "--git-dir"], { cwd })
    ).stdout
      .toString()
      .trim();

    const fullGitDir = path.resolve(cwd, gitDir);

    // Check for the existence of <gitDir>/shallow
    return fs.existsSync(path.join(fullGitDir, "shallow"));
  } else {
    // We have a newer Git which supports `rev-parse --is-shallow-repository`. We'll use
    // the output of that instead of messing with .git/shallow in case that changes in the future.
    return isShallowRepoOutput === "true";
  }
}

export async function deepenCloneBy({ by, cwd }: { by: number; cwd: string }) {
  await spawn("git", ["fetch", `--deepen=${by}`], { cwd });