feat: separate remove-unused command

common/translations-cli/removeUnused.js

@@ -0,0 +1,46 @@
+// @ts-check
+const { defaultExtractConfig } = require('./constants');
+const { extractAllTranslations } = require('./extract');
+const { getLanguageTranslations, getAllLanguages, setLanguageTranslations } = require('./helpers');
+
+const { directories, extensions } = defaultExtractConfig;
+
+/**
+ * @param {string} language
+ * @param {Record<string, string>} source
+ */
+function getUsedTranslations(language, source) {
+  const languageTranslations = getLanguageTranslations(language);
+
+  for (const key in languageTranslations) {
+    if (!(key in source)) {
+      delete languageTranslations[key];
+    }
+  }
+
+  return languageTranslations;
+}
+
+async function removeUnusedAllTranslations() {
+  const source = await extractAllTranslations(directories, extensions);
+  const languages = getAllLanguages();
+
+  for (const language of languages) {
+    const newTranslations = getUsedTranslations(language, source);
+    setLanguageTranslations(language, newTranslations);
+  }
+}
+
+/**
+ * @param {string} language
+ */
+async function removeUnusedForSignelLanguage(language) {
+  const source = await extractAllTranslations(directories, extensions);
+  const newTranslations = getUsedTranslations(language, source);
+  setLanguageTranslations(language, newTranslations);
+}
+
+module.exports = {
+  removeUnusedAllTranslations,
+  removeUnusedForSignelLanguage,
+};