import os.path
import subprocess

def get_latest_file_content(file_path="./cli.py", encoding="utf-8", tag_name=""):
    dirname = os.path.dirname(file_path)
    basename = os.path.basename(file_path)
    # 获取最近一次修改该文件的commit的ID
    heading = "HEAD"
    if tag_name:
        result = subprocess.run(
            ["git", "rev-list", "-n", "1", "tag-autolocalization", "--", basename],
            cwd=dirname,
            capture_output=True,
            text=True,
        )
        commit_id = result.stdout.replace('"', "").replace("'", "").strip()
        heading = commit_id if commit_id else heading
    result = subprocess.run(
        ["git", "show", f"{heading}:./{basename}"],
        cwd=dirname,
        capture_output=True,
        text=True,
        encoding=encoding,
    )
    return result.stdout


if __name__ == "__main__":
    print(get_latest_file_content("cli.py"))