Lingui JSON catalog format migration script v3 -> v4

migrate.ts

#!/usr/bin/env node

/* eslint-disable no-restricted-syntax, no-await-in-loop */

import crypto from 'node:crypto'
import fs from 'node:fs/promises'

// from https://github.com/lingui/js-lingui/blob/59f0eb3565611d5860c883aa42a20365392ca1d8/packages/message-utils/src/generateMessageId.ts
const UNIT_SEPARATOR = '\u001F'
function generateMessageId(msg, context = '') {
  return crypto
    .createHash('sha256')
    .update(msg + UNIT_SEPARATOR + (context || ''))
    .digest('base64')
    .slice(0, 6)
}

function printHelp() {
  process.stdout.write(
    [
      'Migrate Lingui’s JSON catalogues into new hash–based keys.',
      '',
      `Usage: ${process.argv.slice(0, 2).join(' ')} JSON_FILE...`,
      '',
    ].join('\n')
  )
}

const filePaths = process.argv.slice(2)
if (!filePaths.length) {
  printHelp()
  process.exit(64)
} else if (['-h', '--help'].includes(filePaths[0])) {
  printHelp()
  process.exit(0)
}

for (const filePath of filePaths) {
  const json = await fs.readFile(filePath, { encoding: 'utf-8' })
  const msgs = JSON.parse(json)
  const newMsgs = Object.fromEntries(
    Object.entries(msgs).map(([key, value]) => {
      if (value.message) {
        // Already in new format
        return [key, value]
      }
      const message = key
      const { translation, extractedComments: comments } = value
      return [
        generateMessageId(message),
        {
          translation,
          message,
          comments,
        },
      ]
    })
  )
  await fs.writeFile(filePath, JSON.stringify(newMsgs, null, 2))
}

process.stdout.write('Done. You probably want to run this now:\n')
process.stdout.write('npx lingui extract && npx lingui compile\n')