make_initrd.py

#!/usr/bin/env python3

import os
import sys
import tarfile

tar_output_file = sys.argv[1]
tar_sysroot_path = sys.argv[2]

print(f"Creating initrd from {tar_sysroot_path} to {tar_output_file}")
# Create tar file in USTAR format (UNIX standard tar)
with tarfile.open(tar_output_file, mode="w", format=tarfile.USTAR_FORMAT) as tar:
    # Change to the sysroot directory to make paths relative
    original_dir = os.getcwd()
    os.chdir(tar_sysroot_path)
    # Walk through all files and directories recursively
    for root, dirs, files in os.walk("."):
        for file in files:
            file_path = os.path.join(root, file)
            file_arc_path = f'/{os.path.relpath(file_path, tar_sysroot_path)}'
            file_arc_path = os.path.normpath(file_arc_path)
            print(f"Adding: {file_path} -> {file_arc_path}")
            tar.add(file_path, file_arc_path)
    # Return to the original directory
    os.chdir(original_dir)
print(f"Successfully created {tar_output_file}")