[vue-18n] Extracts i18n keys from vue files and add them to the locale files. Supports only "v-t" method keys (not "$t") and json locale files (not yaml).

update_vue-i18n_locale_files.py

#!/usr/bin/env python3

'''
BEWARE: Poorly tested. Use at your own risk.
It replaces json files content. Backup first!

For use with https://github.com/kazupon/vue-i18n
Extracts i18n keys from vue files and add them to the locale files.
Supports only "v-t" method keys (not "$t") and json locale files (not yaml).
Doesn't support dynamic keys (v-t="var"), only static (v-t="'word'").

Usage:
Place this file in the project's root folder, which contains the "src" folder.
Run.
'''

import re
import json
from pathlib import Path

base_path = Path('src')

# extract i18n keys from vue files
i18n_keys = []
vue_files = base_path.glob('**/*.vue')
for filepath in vue_files:
    with open(filepath, 'r') as fp:
        text = fp.read()
        i18n_keys += re.findall(r'v-t="\'(.+?)\'"', text)

locale_files = (base_path / 'locales').glob('**/*.json')
for filepath in locale_files:
    print('\nprocessing', filepath)

    with open(filepath, 'r') as fp:
        locale_data = json.load(fp)

    # add new keys
    changed = False
    for key in i18n_keys:
        if key not in locale_data:
            print('adding', key)
            locale_data[key] = ''
            changed = True

    # check if extraneous keys exist
    extraneous = set(locale_data) - set(i18n_keys)
    if extraneous:
        print('\npossible extraneous keys in', filepath)
        print('\n'.join(extraneous))

    # write modified file
    if changed:
        with open(filepath, 'w') as fp:
            json.dump(locale_data, fp, ensure_ascii=False, indent=True)
    else:
        print('nothing to do')