refactor(@angular-devkit/build-angular): remove unneeded 10.1 localize checks

Now that 11.0 is the minimum supported version, the 10.1 support checks for the `@angular/localize` package can be removed.

Author: clydin

packages/angular_devkit/build_angular/src/extract-i18n/index.ts

@@ -15,7 +15,6 @@ import { JsonObject } from '@angular-devkit/core';
 import type { ɵParsedMessage as LocalizeMessage } from '@angular/localize';
 import * as fs from 'fs';
 import * as path from 'path';
-import { gte as semverGte } from 'semver';
 import * as webpack from 'webpack';
 import { Schema as BrowserBuilderOptions } from '../browser/schema';
 import { ExecutionTransformer } from '../transforms';
@@ -212,16 +211,12 @@ export async function execute(
   );
 
   if (usingIvy) {
-    let validLocalizePackage = false;
     try {
-      const { version: localizeVersion } = require('@angular/localize/package.json');
-      validLocalizePackage = semverGte(localizeVersion, '10.1.0-next.0', { includePrerelease: true });
-    } catch {}
-
-    if (!validLocalizePackage) {
+      require.resolve('@angular/localize');
+    } catch {
       return {
         success: false,
-        error: `Ivy extraction requires the '@angular/localize' package version 10.1.0 or higher.`,
+        error: `Ivy extraction requires the '@angular/localize' package.`,
        };
     }
   }

packages/angular_devkit/build_angular/src/utils/process-bundle.ts

@@ -19,7 +19,6 @@ import templateBuilder from '@babel/template';
 import { createHash } from 'crypto';
 import * as fs from 'fs';
 import * as path from 'path';
-import { lt as semverLt } from 'semver';
 import { RawSourceMap, SourceMapConsumer, SourceMapGenerator } from 'source-map';
 import { minify } from 'terser';
 import * as v8 from 'v8';
@@ -884,26 +883,10 @@ function findLocalizePositions(
   return positions;
 }
 
-// TODO: Remove this for v11.
-// This check allows the CLI to support both FW 10.0 and 10.1
-let localizeOld: boolean | undefined;
-
 function unwrapTemplateLiteral(
   path: NodePath<types.TaggedTemplateExpression>,
   utils: LocalizeUtilities,
 ): [TemplateStringsArray, types.Expression[]] {
-  if (localizeOld === undefined) {
-    const { version: localizeVersion } = require('@angular/localize/package.json');
-    localizeOld = semverLt(localizeVersion, '10.1.0-rc.0', { includePrerelease: true });
-  }
-
-  if (localizeOld) {
-    // tslint:disable-next-line: no-any
-    const messageParts = utils.unwrapMessagePartsFromTemplateLiteral(path.node.quasi.quasis as any);
-
-    return [(messageParts as unknown) as TemplateStringsArray, path.node.quasi.expressions];
-  }
-
   const [messageParts] = utils.unwrapMessagePartsFromTemplateLiteral(
     path.get('quasi').get('quasis'),
   );
@@ -916,22 +899,6 @@ function unwrapLocalizeCall(
   path: NodePath<types.CallExpression>,
   utils: LocalizeUtilities,
 ): [TemplateStringsArray, types.Expression[]] {
-  if (localizeOld === undefined) {
-    const { version: localizeVersion } = require('@angular/localize/package.json');
-    localizeOld = semverLt(localizeVersion, '10.1.0-rc.0', { includePrerelease: true });
-  }
-
-  if (localizeOld) {
-    const messageParts = utils.unwrapMessagePartsFromLocalizeCall(path);
-    // tslint:disable-next-line: no-any
-    const expressions = utils.unwrapSubstitutionsFromLocalizeCall(path.node as any);
-
-    return [
-      (messageParts as unknown) as TemplateStringsArray,
-      (expressions as unknown) as types.Expression[],
-    ];
-  }
-
   const [messageParts] = utils.unwrapMessagePartsFromLocalizeCall(path);
   const [expressions] = utils.unwrapSubstitutionsFromLocalizeCall(path);
 

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

@@ -21,17 +21,10 @@ export default async function() {
 
   // Should fail with --ivy flag if `@angular/localize` is missing
   const { message: message1 } = await expectToFail(() => ng('xi18n'));
-  if (!message1.includes(`Ivy extraction requires the '@angular/localize' package version 10.1.0 or higher.`)) {
+  if (!message1.includes(`Ivy extraction requires the '@angular/localize' package.`)) {
     throw new Error('Expected localize package error message when missing');
   }
 
-  // Should fail with --ivy flag if `@angular/localize` is wrong version
-  await npm('install', '@angular/localize@9');
-  const { message: message2 } = await expectToFail(() => ng('xi18n', '--ivy'));
-  if (!message2.includes(`Ivy extraction requires the '@angular/localize' package version 10.1.0 or higher.`)) {
-    throw new Error('Expected localize package error message when wrong version');
-  }
-
   // Install correct version
   let localizeVersion = '@angular/localize@' + readNgVersion();
   if (getGlobalVariable('argv')['ng-snapshots']) {