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overleaf/services/web/scripts/translations/checkVariables.js

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const fs = require('fs')
const Path = require('path')
const GLOBALS = ['__appName__']
const LOCALES = Path.join(__dirname, '../../locales')
const baseLocalePath = Path.join(LOCALES, 'en.json')
const baseLocale = JSON.parse(fs.readFileSync(baseLocalePath, 'utf-8'))
const baseLocaleKeys = Object.keys(baseLocale)
const IGNORE_ORPHANED_TRANSLATIONS = process.argv.includes(
'--ignore-orphaned-translations'
)
const IGNORE_NESTING_FOR = {
over_x_templates_easy_getting_started: ['__templates__'],
all_packages_and_templates: ['__templatesLink__'],
}
function fetchKeys(str) {
const matches = str.matchAll(/__.*?__/g)
if (matches.length === 0) {
return []
}
return Array.from(matches).map(match => match[0])
}
function difference(key, base, target) {
const nesting = IGNORE_NESTING_FOR[key] || []
const keysInBaseButNotInTarget = base.filter(
key => !target.includes(key) && !nesting.includes(key)
)
const keysInTargetButNotInBase = target.filter(
key => !base.includes(key) && !GLOBALS.includes(key)
)
return {
keysInBaseButNotInTarget,
keysInTargetButNotInBase,
}
}
let violations = 0
for (const localeName of fs.readdirSync(LOCALES)) {
if (localeName === 'README.md') continue
const localePath = Path.join(LOCALES, localeName)
const locale = JSON.parse(fs.readFileSync(localePath, 'utf-8'))
for (const key of Object.keys(locale)) {
if (!baseLocaleKeys.includes(key)) {
if (IGNORE_ORPHANED_TRANSLATIONS) continue
violations += 1
console.warn(`[${localeName}] Orphaned key "${key}" not found in en.json`)
continue
}
const keysInTranslation = fetchKeys(locale[key])
const keysInBase = fetchKeys(baseLocale[key])
const { keysInBaseButNotInTarget, keysInTargetButNotInBase } = difference(
key,
keysInBase,
keysInTranslation
)
if (keysInBaseButNotInTarget.length) {
violations += keysInBaseButNotInTarget.length
console.warn(
`[${localeName}] Missing variables in key "${key}":`,
keysInBaseButNotInTarget
)
}
if (keysInTargetButNotInBase.length) {
violations += keysInTargetButNotInBase.length
console.warn(
`[${localeName}] Extra variables in key "${key}":`,
keysInTargetButNotInBase
)
}
}
}
if (violations) {
console.warn('Variables are not in sync between translations.')
process.exit(1)
} else {
console.log('Variables are in sync.')
process.exit(0)
}