feat(@angular-devkit/build-angular): optimize i18n localize usage in source locale

Author: clydin

packages/angular_devkit/build_angular/package.json

@@ -98,7 +98,7 @@
   },
   "peerDependencies": {
     "@angular/compiler-cli": ">=9.0.0-beta < 10",
-    "@angular/localize": "^9.0.0-next.10",
+    "@angular/localize": "^9.0.0-next.11",
     "typescript": ">=3.6 < 3.7"
   },
   "peerDependenciesMeta": {

packages/angular_devkit/build_angular/src/browser/index.ts

@@ -459,30 +459,15 @@ export function buildWebpackBrowser(
 
                 const diagnostics = new localizeDiag.Diagnostics();
                 const translationFilePaths = [];
-                let copySourceLocale = false;
+                let handleSourceLocale = false;
                 for (const locale of i18n.inlineLocales) {
                   if (locale === i18n.sourceLocale) {
-                    copySourceLocale = true;
+                    handleSourceLocale = true;
                     continue;
                   }
                   translationFilePaths.push(i18n.locales[locale].file);
                 }
 
-                if (copySourceLocale) {
-                  await copyAssets(
-                    [
-                      {
-                        glob: '**/*',
-                        // tslint:disable-next-line: no-non-null-assertion
-                        input: webpackStats.outputPath!,
-                        output: i18n.sourceLocale,
-                      },
-                    ],
-                    [baseOutputPath],
-                    '',
-                  );
-                }
-
                 if (translationFilePaths.length > 0) {
                   const sourceFilePaths = [];
                   for (const result of processResults) {
@@ -503,6 +488,7 @@ export function buildWebpackBrowser(
                         path.join(baseOutputPath, locale, relativePath),
                       diagnostics,
                       missingTranslation: options.i18nMissingTranslation || 'warning',
+                      sourceLocale: handleSourceLocale ? i18n.sourceLocale : undefined,
                     });
                   } catch (err) {
                     context.logger.error('Localized bundle generation failed: ' + err.message);

tests/legacy-cli/e2e/tests/i18n/ivy-localize.ts

@@ -25,10 +25,6 @@ export default async function() {
   }
   await npm('install', `${localizeVersion}`);
 
-  // Temporarily add the localize "polyfill" -- release version will not need this
-  // TODO: Remove after next framework release
-  await appendToFile('src/polyfills.ts', '\nimport "@angular/localize/init";');
-
   const baseDir = 'dist/test-project';
 
   // Set configurations for each locale.
@@ -108,6 +104,8 @@ export default async function() {
   for (const { lang, translation } of langTranslations) {
     await expectFileToMatch(`${baseDir}/${lang}/main-es5.js`, translation);
     await expectFileToMatch(`${baseDir}/${lang}/main-es2015.js`, translation);
+    await expectToFail(() => expectFileToMatch(`${baseDir}/${lang}/main-es5.js`, '$localize'));
+    await expectToFail(() => expectFileToMatch(`${baseDir}/${lang}/main-es2015.js`, '$localize'));
 
     // Ivy i18n doesn't yet work with `ng serve` so we must use a separate server.
     const app = express();