Full list of fallbacks from MediaWiki message*.php

[In1quity]

No description provided.

[jwbth]

Cool. What's the best way to update it when an update is needed next time?

[In1quity]

I haven't really figured out how to do this. I think I'll just manually adjust the list from time to time, or use something like this (but this script forgets the quotes.):

const fs = require('fs');
const path = require('path');

const messagesDir = path.join(__dirname, 'messages'); //https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/HEAD/languages/messages
const outputFile = path.join(__dirname, 'data/languageFallbacks.mediawiki.json');
const output = {};

const fallbackRegex = /\$fallback\s*=\s*([^;]+);/;

fs.readdirSync(messagesDir).forEach(file => {
  if (!file.startsWith('Messages') || !file.endsWith('.php')) return;
  const code = file
    .replace(/^Messages/, '')
    .replace(/_/g, '-')
    .replace(/\.php$/, '')
    .toLowerCase();

  const content = fs.readFileSync(path.join(messagesDir, file), 'utf8');
  const match = content.match(fallbackRegex);

  if (match) {
    let value = match[1].trim();
    if (value.startsWith('[')) {
      // Array fallback: [ 'skr', 'ur' ]
      value = value
        .replace(/\[|\]|'|\s/g, '')
        .split(',')
        .filter(Boolean);
    } else if (value.startsWith("'")) {
      // Single fallback: 'ru'
      value = [value.replace(/'/g, '')];
    } else if (value.includes(',')) {
      // Comma-separated string: 'skr, ur, en'. NEEDTOFIX: forgot quotes
      value = value
        .replace(/'/g, '')
        .split(',')
        .map(s => s.trim())
        .filter(Boolean);
    } else {
      value = [];
    }
    output[code] = value;
  } else {
    output[code] = [];
  }
});

if (!fs.existsSync(path.join(__dirname, 'data'))) {
  fs.mkdirSync(path.join(__dirname, 'data'));
}

fs.writeFileSync(outputFile, JSON.stringify(output, null, 2), 'utf8');
console.log('languageFallbacks.mediawiki.json generated!');