Revert "build: generate alias locale data for closure locale (#42230)" (#42583)

This reverts commit 044e0229bd.

PR Close #42583

packages/common/locales/generate-locales-tool/cldr-data.ts

@@ -31,9 +31,6 @@ const CLDR_DATA_GLOBS = [
 /** Path to the CLDR available locales file. */
 const CLDR_AVAILABLE_LOCALES_PATH = 'cldr-core-37.0.0/availableLocales.json';
 
-/** Path to the CLDR locale aliases file. */
-const CLDR_LOCALE_ALIASES_PATH = 'cldr-core-37.0.0/supplemental/aliases.json';
-
 /**
  * Instance providing access to a locale's CLDR data. This type extends the `cldrjs`
  * instance type with the missing `bundle` attribute property.
@@ -48,13 +45,6 @@ export type CldrLocaleData = CldrStatic&{
   }
 };
 
-/**
- * Possible reasons for an alias in the CLDR supplemental data. See:
- * https://unicode.org/reports/tr35/tr35-info.html#Appendix_Supplemental_Metadata.
- */
-export type CldrLocaleAliasReason =
-    'deprecated'|'overlong'|'macrolanguage'|'legacy'|'bibliographic';
-
 /**
  * Class that provides access to the CLDR data downloaded as part of
  * the `@cldr_data` Bazel repository.
@@ -87,16 +77,6 @@ export class CldrData {
     return localeData;
   }
 
-  /**
-   * Gets the CLDR language aliases.
-   * http://cldr.unicode.org/index/cldr-spec/language-tag-equivalences.
-   */
-  getLanguageAliases():
-      {[localeName: string]: {_reason: CldrLocaleAliasReason, _replacement: string}} {
-    return require(`${this.cldrDataDir}/${CLDR_LOCALE_ALIASES_PATH}`)
-        .supplemental.metadata.alias.languageAlias;
-  }
-
   /** Gets a list of all locales CLDR provides data for. */
   private _getAvailableLocales(): CldrLocaleData[] {
     const allLocales =

packages/common/locales/generate-locales-tool/closure-locale-file.ts

@@ -6,45 +6,35 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {CldrData, CldrLocaleData} from './cldr-data';
+import {CldrStatic} from 'cldrjs';
+
+import {CldrData} from './cldr-data';
 import {fileHeader} from './file-header';
 import {BaseCurrencies} from './locale-base-currencies';
 import {generateLocale} from './locale-file';
 
-interface ClosureLocale {
-  /** Locale name to match with a Closure-supported locale. */
-  closureLocaleName: string;
-  /** Locale data. Can have a different locale name if this captures an aliased locale. */
-  data: CldrLocaleData;
-}
-
 /**
  * Generate a file that contains all locale to import for closure.
  * Tree shaking will only keep the data for the `goog.LOCALE` locale.
  */
 export function generateClosureLocaleFile(cldrData: CldrData, baseCurrencies: BaseCurrencies) {
-  const locales: ClosureLocale[] =
-      [...cldrData.availableLocales.map(data => ({closureLocaleName: data.locale, data}))];
-  const aliases = cldrData.getLanguageAliases();
+  const locales = cldrData.availableLocales;
 
-  // We also generate locale data for aliases known within CLDR. Closure compiler does not
-  // limit its locale identifiers to CLDR-canonical identifiers/or BCP47 identifiers.
-  // To ensure deprecated/historical locale identifiers which are supported by Closure
-  // can work with closure-compiled Angular applications, we respect CLDR locale aliases.
-  for (const [aliasName, data] of Object.entries(aliases)) {
-    // We skip bibliographic aliases as those have never been supported by Closure compiler.
-    if (data._reason === 'bibliographic') {
-      continue;
-    }
+  function generateLocaleConstant(localeData: CldrStatic): string {
+    const locale = localeData.locale;
+    const localeNameFormattedForJs = formatLocale(locale);
+    return generateLocale(locale, localeData, baseCurrencies)
+        .replace(`${fileHeader}\n`, '')
+        .replace('export default ', `export const locale_${localeNameFormattedForJs} = `)
+        .replace('function plural', `function plural_${localeNameFormattedForJs}`)
+        .replace(/,\s+plural/, `, plural_${localeNameFormattedForJs}`)
+        .replace(/\s*const u = undefined;\s*/, '');
+  }
 
-    const localeData = cldrData.getLocaleData(data._replacement);
-
-    // If CLDR does not provide data for the replacement locale, we skip this alias.
-    if (localeData === null) {
-      continue;
-    }
-
-    locales.push({closureLocaleName: aliasName, data: localeData});
+  function generateCase(localeName: string) {
+    return `case '${localeName}':\n` +
+        `l = locale_${formatLocale(localeName)};\n` +
+        `break;\n`;
   }
 
   return `${fileHeader}
@@ -58,28 +48,12 @@ ${locales.map(locale => `${generateLocaleConstant(locale)}`).join('\n')}
 let l: any;
 
 switch (goog.LOCALE) {
-${locales.map(locale => generateCase(locale)).join('')}}
+${locales.map(localeData => generateCase(localeData.locale)).join('')}}
 
 if (l) {
   registerLocaleData(l);
 }
 `;
-
-  function generateLocaleConstant(locale: ClosureLocale): string {
-    const localeNameFormattedForJs = formatLocale(locale.closureLocaleName);
-    return generateLocale(locale.closureLocaleName, locale.data, baseCurrencies)
-        .replace(`${fileHeader}\n`, '')
-        .replace('export default ', `export const locale_${localeNameFormattedForJs} = `)
-        .replace('function plural', `function plural_${localeNameFormattedForJs}`)
-        .replace(/,\s+plural/, `, plural_${localeNameFormattedForJs}`)
-        .replace(/\s*const u = undefined;\s*/, '');
-  }
-
-  function generateCase(locale: ClosureLocale) {
-    return `case '${locale.closureLocaleName}':\n` +
-        `l = locale_${formatLocale(locale.closureLocaleName)};\n` +
-        `break;\n`;
-  }
 }
 
 function formatLocale(locale: string): string {

packages/common/locales/generate-locales-tool/locale-file.ts

@@ -23,7 +23,7 @@ export function generateLocale(
   return `${fileHeader}
 const u = undefined;
 
-${getPluralFunction(localeData)}
+${getPluralFunction(locale)}
 
 export default ${generateBasicLocaleString(locale, localeData, baseCurrencies)};
 `;

packages/common/locales/generate-locales-tool/locale-global-file.ts

@@ -27,7 +27,7 @@ export function generateLocaleGlobalFile(
     global.ng.common = global.ng.common || {};
     global.ng.common.locales = global.ng.common.locales || {};
     const u = undefined;
-    ${getPluralFunction(localeData, false)}
+    ${getPluralFunction(locale, false)}
     global.ng.common.locales['${normalizeLocale(locale)}'] = ${data};
   })(typeof globalThis !== 'undefined' && globalThis || typeof global !== 'undefined' && global || typeof window !== 'undefined' && window);
     `;

packages/common/locales/generate-locales-tool/plural-function.ts

@@ -5,7 +5,6 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-import {CldrLocaleData} from './cldr-data';
 
 // There are no types available for `cldr`.
 const cldr = require('cldr');
@@ -15,13 +14,8 @@ const cldr = require('cldr');
  * TODO(ocombe): replace "cldr" extractPluralRuleFunction with our own extraction using "CldrJS"
  * because the 2 libs can become out of sync if they use different versions of the cldr database
  */
-export function getPluralFunction(localeData: CldrLocaleData, withTypes = true) {
-  // We use the resolved bundle for extracting the plural function. This matches with the
-  // lookup logic used by other extractions in the tool (using `cldrjs`), and also ensures
-  // we follow the CLDR-specified bundle lookup algorithm. A language does not necessarily
-  // resolve directly to a bundle CLDR provides data for.
-  const bundleName = localeData.attributes.bundle;
-  let fn = cldr.extractPluralRuleFunction(bundleName).toString();
+export function getPluralFunction(locale: string, withTypes = true) {
+  let fn = cldr.extractPluralRuleFunction(locale).toString();
 
   const numberType = withTypes ? ': number' : '';
   fn =