🎉 New script to find unused translations

frontend/scripts/find-unused-translations.js

@@ -0,0 +1,90 @@
+const fs = require('fs').promises;
+const gt = require("gettext-parser");
+const path = require('path');
+const util = require('node:util');
+const execFile = util.promisify(require('node:child_process').execFile);
+
+
+async function processMsgId(msgId){
+  return execFile('grep', ['-r', '-o', msgId, './src'])
+  .catch(()=> { return msgId})
+}
+
+
+async function processFile(f) {
+  const content = await fs.readFile(f);
+  const data = gt.po.parse(content, "utf-8")
+  const translations = data.translations[''];
+  const badIds = [];
+
+  for (const property in translations) {
+    const data = await processMsgId(translations[property].msgid);
+    if (data!=null && data.stdout === undefined){
+      badIds.push(data)
+    }
+  }
+
+  return badIds;
+}
+
+async function cleanFile(f, badIds) {
+  console.log ("\n\nDoing automatic cleanup")
+
+  const content = await fs.readFile(f);
+  const data = gt.po.parse(content, "utf-8");
+  const translations = data.translations[''];
+  const keys = Object.keys(translations);
+
+  for (const key of keys) {
+    property = translations[key];
+    if (badIds.includes(property.msgid)){
+      console.log ('----> deleting', property.msgid)
+      delete data.translations[''][key];
+    }
+  }
+
+  const buff = gt.po.compile(data, {sort: true});
+  await fs.writeFile(f, buff);
+}
+
+
+
+async function findExecutionTimeTranslations() {
+  const { stdout } = await execFile('grep', ['-r', '-h', '-F', '(tr (', './src']);
+  console.log(stdout);
+}
+
+async function welcome() {
+  console.log ('####################################################################')
+  console.log ('#                UNUSED TRANSLATIONS FINDER                        #')
+  console.log ('####################################################################')
+  console.log ('\n');
+  console.log ('DISCLAIMER: Some translations are only available at execution time.')
+  console.log ('            This finder can\'t process them, so there can be')
+  console.log ('            false positives.\n')
+  console.log ('            If you want to do an automatic clean anyway,')
+  console.log ('            call the script with:')
+  console.log ('            npm run find-unused-translations -- --clean')
+  console.log ('            For example:');
+  console.log ('--------------------------------------------------------------------');
+  await findExecutionTimeTranslations();
+  console.log ('--------------------------------------------------------------------');
+}
+
+
+const doCleanup = process.argv.slice(2)[0] == "--clean";
+
+
+;(async () => {
+  await welcome();
+  const target = path.normalize("./translations/en.po");
+  const badIds = await processFile(target);
+
+  if (doCleanup){
+    cleanFile(target, badIds);
+  } else {
+    for (const badId of badIds){
+      console.log(badId);
+    }
+  }
+})()