fix(core): CLI command write-translations should extract translations…

… from @Docu… (#7996)

packages/docusaurus/src/commands/writeTranslations.ts

@@ -29,6 +29,14 @@ export type WriteTranslationsCLIOptions = Pick<
 > &
   WriteTranslationsOptions;
 
+function resolveThemeCommonLibDir(): string | undefined {
+  try {
+    return path.dirname(require.resolve('@docusaurus/theme-common'));
+  } catch {
+    return undefined;
+  }
+}
+
 /**
  * This is a hack, so that @docusaurus/theme-common translations are extracted!
  * A theme doesn't have a way to express that one of its dependency (like
@@ -37,14 +45,11 @@ export type WriteTranslationsCLIOptions = Pick<
  * We just make an exception and assume that user is using an official theme
  */
 async function getExtraSourceCodeFilePaths(): Promise<string[]> {
-  try {
-    const themeCommonSourceDir = path.dirname(
-      require.resolve('@docusaurus/theme-common/lib'),
-    );
-    return globSourceCodeFilePaths([themeCommonSourceDir]);
-  } catch {
+  const themeCommonLibDir = resolveThemeCommonLibDir();
+  if (!themeCommonLibDir) {
     return []; // User may not use a Docusaurus official theme? Quite unlikely...
   }
+  return globSourceCodeFilePaths([themeCommonLibDir]);
 }
 
 async function writePluginTranslationFiles({
@@ -108,6 +113,7 @@ Available locales are: ${context.i18n.locales.join(',')}.`,
     babelOptions,
     await getExtraSourceCodeFilePaths(),
   );
+
   const defaultCodeMessages = await getPluginsDefaultCodeTranslationMessages(
     plugins,
   );