@angular-devkit/build-angular
Version:
Angular Webpack Build Facade
81 lines (80 loc) • 3.29 kB
JavaScript
;
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.dev/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.OccurrencesPlugin = void 0;
const PLUGIN_NAME = 'angular-occurrences-plugin';
class OccurrencesPlugin {
options;
constructor(options) {
this.options = options;
}
apply(compiler) {
compiler.hooks.thisCompilation.tap(PLUGIN_NAME, (compilation) => {
compilation.hooks.processAssets.tapPromise({
name: PLUGIN_NAME,
stage: compiler.webpack.Compilation.PROCESS_ASSETS_STAGE_ANALYSE,
}, async (compilationAssets) => {
for (const assetName of Object.keys(compilationAssets)) {
if (!assetName.endsWith('.js')) {
continue;
}
const scriptAsset = compilation.getAsset(assetName);
if (!scriptAsset || scriptAsset.source.size() <= 0) {
continue;
}
const src = scriptAsset.source.source().toString('utf-8');
let ngComponentCount = 0;
if (!this.options.aot) {
// Count the number of `Component({` strings (case sensitive), which happens in __decorate().
ngComponentCount += this.countOccurrences(src, 'Component({');
}
if (this.options.scriptsOptimization) {
// for ascii_only true
ngComponentCount += this.countOccurrences(src, '.\\u0275cmp', false);
}
else {
// For Ivy we just count ɵcmp.src
ngComponentCount += this.countOccurrences(src, '.ɵcmp', true);
}
compilation.updateAsset(assetName, (s) => s, (assetInfo) => ({
...assetInfo,
ngComponentCount,
}));
}
});
});
}
countOccurrences(source, match, wordBreak = false) {
let count = 0;
// We condition here so branch prediction happens out of the loop, not in it.
if (wordBreak) {
const re = /\w/;
for (let pos = source.lastIndexOf(match); pos >= 0; pos = source.lastIndexOf(match, pos)) {
if (!(re.test(source[pos - 1] || '') || re.test(source[pos + match.length] || ''))) {
count++; // 1 match, AH! AH! AH! 2 matches, AH! AH! AH!
}
pos -= match.length;
if (pos < 0) {
break;
}
}
}
else {
for (let pos = source.lastIndexOf(match); pos >= 0; pos = source.lastIndexOf(match, pos)) {
count++; // 1 match, AH! AH! AH! 2 matches, AH! AH! AH!
pos -= match.length;
if (pos < 0) {
break;
}
}
}
return count;
}
}
exports.OccurrencesPlugin = OccurrencesPlugin;