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| /* eslint-disable no-restricted-syntax */ | |
| /** | |
| * This script will extract the internationalization messages from all components | |
| * and package them in the translation json files in the translations file. | |
| */ | |
| require('shelljs/global'); | |
| const fs = require('fs'); | |
| const nodeGlob = require('glob'); | |
| const { transform } = require('@babel/core'); | |
| const get = require('lodash/get'); | |
| const animateProgress = require('./helpers/progress'); | |
| const addCheckmark = require('./helpers/checkmark'); | |
| const { appLocales, DEFAULT_LOCALE } = require('../../app/i18n'); | |
| const babel = require('../../babel.config.js'); | |
| const { presets } = babel; | |
| let plugins = babel.plugins || []; | |
| plugins.push('react-intl'); | |
| // NOTE: styled-components plugin is filtered out as it creates errors when used with transform | |
| plugins = plugins.filter(p => p !== 'styled-components'); | |
| // Glob to match all js files except test files | |
| const FILES_TO_PARSE = 'app/**/!(*.test).js'; | |
| const newLine = () => process.stdout.write('\n'); | |
| // Progress Logger | |
| let progress; | |
| const task = message => { | |
| progress = animateProgress(message); | |
| process.stdout.write(message); | |
| return error => { | |
| if (error) { | |
| process.stderr.write(error); | |
| } | |
| clearTimeout(progress); | |
| return addCheckmark(() => newLine()); | |
| }; | |
| }; | |
| // Wrap async functions below into a promise | |
| const glob = pattern => | |
| new Promise((resolve, reject) => { | |
| nodeGlob( | |
| pattern, | |
| (error, value) => (error ? reject(error) : resolve(value)), | |
| ); | |
| }); | |
| const readFile = fileName => | |
| new Promise((resolve, reject) => { | |
| fs.readFile( | |
| fileName, | |
| 'utf8', | |
| (error, value) => (error ? reject(error) : resolve(value)), | |
| ); | |
| }); | |
| // Store existing translations into memory | |
| const oldLocaleMappings = []; | |
| const localeMappings = []; | |
| // Loop to run once per locale | |
| for (const locale of appLocales) { | |
| oldLocaleMappings[locale] = {}; | |
| localeMappings[locale] = {}; | |
| // File to store translation messages into | |
| const translationFileName = `app/translations/${locale}.json`; | |
| try { | |
| // Parse the old translation message JSON files | |
| const messages = JSON.parse(fs.readFileSync(translationFileName)); | |
| const messageKeys = Object.keys(messages); | |
| for (const messageKey of messageKeys) { | |
| oldLocaleMappings[locale][messageKey] = messages[messageKey]; | |
| } | |
| } catch (error) { | |
| if (error.code !== 'ENOENT') { | |
| process.stderr.write( | |
| `There was an error loading this translation file: ${translationFileName} | |
| \n${error}`, | |
| ); | |
| } | |
| } | |
| } | |
| const extractFromFile = async filename => { | |
| try { | |
| const code = await readFile(filename); | |
| const output = await transform(code, { filename, presets, plugins }); | |
| const messages = get(output, 'metadata.react-intl.messages', []); | |
| for (const message of messages) { | |
| for (const locale of appLocales) { | |
| const oldLocaleMapping = oldLocaleMappings[locale][message.id]; | |
| // Merge old translations into the babel extracted instances where react-intl is used | |
| const newMsg = locale === DEFAULT_LOCALE ? message.defaultMessage : ''; | |
| localeMappings[locale][message.id] = oldLocaleMapping || newMsg; | |
| } | |
| } | |
| } catch (error) { | |
| process.stderr.write(`\nError transforming file: ${filename}\n${error}\n`); | |
| } | |
| }; | |
| const memoryTask = glob(FILES_TO_PARSE); | |
| const memoryTaskDone = task('Storing language files in memory'); | |
| memoryTask.then(files => { | |
| memoryTaskDone(); | |
| const extractTask = Promise.all( | |
| files.map(fileName => extractFromFile(fileName)), | |
| ); | |
| const extractTaskDone = task('Run extraction on all files'); | |
| // Run extraction on all files that match the glob on line 16 | |
| extractTask.then(() => { | |
| extractTaskDone(); | |
| // Make the directory if it doesn't exist, especially for first run | |
| mkdir('-p', 'app/translations'); // eslint-disable-line | |
| let localeTaskDone; | |
| let translationFileName; | |
| for (const locale of appLocales) { | |
| translationFileName = `app/translations/${locale}.json`; | |
| localeTaskDone = task( | |
| `Writing translation messages for ${locale} to: ${translationFileName}`, | |
| ); | |
| // Sort the translation JSON file so that git diffing is easier | |
| // Otherwise the translation messages will jump around every time we extract | |
| const messages = {}; | |
| Object.keys(localeMappings[locale]) | |
| .sort() | |
| .forEach(key => { | |
| messages[key] = localeMappings[locale][key]; | |
| }); | |
| // Write to file the JSON representation of the translation messages | |
| const prettified = `${JSON.stringify(messages, null, 2)}\n`; | |
| try { | |
| fs.writeFileSync(translationFileName, prettified); | |
| localeTaskDone(); | |
| } catch (error) { | |
| localeTaskDone( | |
| `There was an error saving this translation file: ${translationFileName} | |
| \n${error}`, | |
| ); | |
| } | |
| } | |
| process.exit(); | |
| }); | |
| }); | |