Read bundled language packs directly from wp-files

apps/cli/lib/dependency-management/paths.ts

@@ -62,8 +62,10 @@ export function getSqliteCommandPath(): string {
 	return path.join( getWpFilesPath(), SQLITE_COMMAND_DIRNAME );
 }
 
+// Language packs ship read-only with the CLI bundle and are copied into each site's
+// `wp-content/languages/` directory on site create. No writable cache needed.
 export function getLanguagePacksPath(): string {
-	return path.join( getServerFilesPath(), 'language-packs' );
+	return path.join( getWpFilesPath(), 'latest', 'languages' );
 }
 
 // AI instructions ship read-only with the CLI bundle and are installed into each site's

apps/cli/lib/dependency-management/setup.ts

@@ -1,12 +1,9 @@
 import fs from 'fs';
 import path from 'path';
-import { LOCKFILE_STALE_TIME, LOCKFILE_WAIT_TIME } from '@studio/common/constants';
 import { recursiveCopyDirectory } from '@studio/common/lib/fs-utils';
-import { lockFileAsync, unlockFileAsync } from '@studio/common/lib/lockfile';
 import semver from 'semver';
 import { readCliConfig, updateCliConfigWithPartial } from 'cli/lib/cli-config/core';
-import { getLanguagePacksPath, getWordPressVersionPath, getWpFilesPath } from './paths';
-import { areDirectoriesDifferentBySizeAndMtime } from './utils';
+import { getWordPressVersionPath, getWpFilesPath } from './paths';
 import { getWordPressVersionFromInstallation, updateLatestWordPressVersion } from './wordpress';
 
 // Compare the WordPress version in the bundled `wp-files/latest/wordpress` directory (that ships
@@ -38,40 +35,9 @@ async function copyBundledLatestWpVersion() {
 	}
 }
 
-async function copyBundledLanguagePacks() {
-	const sourceLanguagePacksPath = path.join( getWpFilesPath(), 'latest', 'languages' );
-	if ( ! fs.existsSync( sourceLanguagePacksPath ) ) {
-		return;
-	}
-	const targetLanguagePacksPath = getLanguagePacksPath();
-	const lockPath = `${ targetLanguagePacksPath }.lock`;
-	await fs.promises.mkdir( path.dirname( lockPath ), { recursive: true } );
-	await lockFileAsync( lockPath, {
-		wait: LOCKFILE_WAIT_TIME,
-		stale: LOCKFILE_STALE_TIME,
-	} );
-	try {
-		const isSourceDirectoryDifferent = await areDirectoriesDifferentBySizeAndMtime(
-			sourceLanguagePacksPath,
-			targetLanguagePacksPath
-		);
-		if ( isSourceDirectoryDifferent ) {
-			try {
-				await fs.promises.rm( targetLanguagePacksPath, { recursive: true, force: true } );
-			} catch {
-				// Do nothing if the target directory is missing or corrupted
-			}
-			await recursiveCopyDirectory( sourceLanguagePacksPath, targetLanguagePacksPath );
-		}
-	} finally {
-		await unlockFileAsync( lockPath );
-	}
-}
-
 export async function setupServerFiles() {
 	const steps: [ string, () => Promise< void > ][] = [
 		[ 'WordPress version', copyBundledLatestWpVersion ],
-		[ 'language packs', copyBundledLanguagePacks ],
 	];
 
 	for ( const [ name, step ] of steps ) {

apps/cli/lib/language-packs.ts

@@ -1,6 +1,7 @@
 import fs from 'fs';
 import path from 'path';
 import { pathExists } from '@studio/common/lib/fs-utils';
+import { WP_LOCALES } from '@studio/common/lib/wp-locales';
 import { getLanguagePacksPath } from 'cli/lib/dependency-management/paths';
 
 /**
@@ -51,6 +52,12 @@ export async function copyLanguagePackToSite(
 	sitePath: string,
 	wpLocale: string
 ): Promise< boolean > {
+	// Translations are only bundled for `WP_LOCALES`; skip the readdir() calls over the
+	// ~1,400-entry bundled languages directories when no files could match anyway.
+	if ( ! WP_LOCALES.includes( wpLocale ) ) {
+		return false;
+	}
+
 	const languagePacksDir = getLanguagePacksPath();
 	if ( ! ( await pathExists( languagePacksDir ) ) ) {
 		return false;

apps/cli/migrations/04-cleanup-obsolete-server-files.ts

@@ -7,6 +7,7 @@
  *   - `phpmyadmin/` (phpMyAdmin)
  *   - `wp-cli.phar` (WP-CLI)
  *   - `wordpress-versions/latest/available-site-translations.json`
+ *   - `language-packs/` (WordPress translations, plus its lockfile)
  *
  * Safe to re-run: `needsToRun()` checks for the presence of any obsolete
  * entry, and `run()` tolerates missing paths.
@@ -31,6 +32,8 @@ function getObsoletePaths(): string[] {
 			'latest',
 			'available-site-translations.json'
 		),
+		path.join( serverFilesPath, 'language-packs' ),
+		path.join( serverFilesPath, 'language-packs.lock' ),
 	];
 }