Merge pull request #12230 from wfjsw/git-clone-autofix

    return result.returncode == 0

def git_fix_workspace(dir, name):

    run(f'"{git}" -C "{dir}" fetch --refetch --no-auto-gc', f"Fetching all contents for {name}", f"Couldn't fetch {name}", live=True)

    run(f'"{git}" -C "{dir}" gc --aggressive --prune=now', f"Pruning {name}", f"Couldn't prune {name}", live=True)

    return

def git_clone(url, dir, name, commithash=None):

    # TODO clone into temporary dir and move if successful

        if commithash is None:

            return

        current_hash = run(f'"{git}" -C "{dir}" rev-parse HEAD', None, f"Couldn't determine {name}'s hash: {commithash}", live=False).strip()

        try:

            current_hash = subprocess.check_output([git, "-C", dir, "rev-parse", "HEAD"], shell=False, encoding='utf8').strip()

            if current_hash == commithash:

                return

        except Exception:

            print(f"Unable to determine {name}'s hash, attempting autofix...")

            git_fix_workspace(dir, name)

            current_hash = subprocess.check_output([git, "-C", dir, "rev-parse", "HEAD"], shell=False, encoding='utf8').strip()

            if current_hash == commithash:

                return

        run(f'"{git}" -C "{dir}" fetch', f"Fetching updates for {name}...", f"Couldn't fetch {name}")

        try:

            run(f'"{git}" -C "{dir}" checkout {commithash}', f"Checking out commit for {name} with hash: {commithash}...", f"Couldn't checkout commit {commithash} for {name}", live=True)

        except RuntimeError:

            print(f"Unable to checkout {name} with hash {commithash}, attempting autofix...")

            git_fix_workspace(dir, name)

            run(f'"{git}" -C "{dir}" checkout {commithash}', f"Checking out commit for {name} with hash: {commithash}...", f"Couldn't checkout commit {commithash} for {name}", live=True)

        return

    run(f'"{git}" clone "{url}" "{dir}"', f"Cloning {name} into {dir}...", f"Couldn't clone {name}", live=True)