De-duplicate transifex *.po files.

clean_po.py

"""
Adapted from https://bugs.launchpad.net/ironic/+bug/1298645/comments/2
"""
import argparse
import os
import shutil
import tempfile


def patch_po_files(input_dir_name):
    affected_paths = []

    for root, dirs, files in os.walk(input_dir_name):
        for file_name in files:
            path = os.path.join(root, file_name)
            with open(path, "r") as input_file:
                with tempfile.NamedTemporaryFile(delete=False) as tmp_file:
                    matchee = '#~ msg'
                    match_yet = False
                    for line in input_file:
                        if match_yet:
                            continue
                        if not line.startswith(matchee):
                            tmp_file.write(line)
                        else:
                            match_yet = True

            shutil.move(tmp_file.name, path)
            affected_paths.append(path)

    return affected_paths


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='De-duplicate *.po files.')
    parser.add_argument('locale_dir')
    args = parser.parse_args()

    for path in patch_po_files(args.locale_dir):
        print('Patched: %s' % path)