266cc9b162
This commit changes the `PartialComponentLinker` to use the original source of an external template when compiling, if available, to ensure that the source-mapping of the final linked code is accurate. If the linker is given a file-system and logger, then it will attempt to compute the original source of external templates so that the final linked code references the correct template source. PR Close #40237
80 lines
2.8 KiB
TypeScript
80 lines
2.8 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {PluginObj, transformSync} from '@babel/core';
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import * as ts from 'typescript';
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import {needsLinking} from '../../../linker';
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import {createEs2015LinkerPlugin} from '../../../linker/babel';
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import {MockFileSystemNative} from '../../../src/ngtsc/file_system/testing';
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import {MockLogger} from '../../../src/ngtsc/logging/testing';
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import {compileFiles, CompileFn, setCompileFn} from '../mock_compile';
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/**
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* A function to compile the given code in two steps:
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*
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* - first compile the code in partial mode
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* - then compile the partially compiled code using the linker
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*
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* This should produce the same output as the full AOT compilation
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*/
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const linkedCompile: CompileFn = (data, angularFiles, options) => {
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if (options !== undefined && options.target !== undefined &&
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options.target < ts.ScriptTarget.ES2015) {
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pending('ES5 is not supported in the partial compilation tests');
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throw new Error('ES5 is not supported in the partial compilation tests');
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}
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const compiledFiles = compileFiles(data, angularFiles, {...options, compilationMode: 'partial'});
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const fileSystem = new MockFileSystemNative();
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const logger = new MockLogger();
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const linkerPlugin = createEs2015LinkerPlugin({
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fileSystem,
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logger,
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// enableI18nLegacyMessageIdFormat defaults to false in `compileFiles`.
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enableI18nLegacyMessageIdFormat: false,
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...options,
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});
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const source =
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compiledFiles
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.map(file => applyLinker({path: file.fileName, source: file.source}, linkerPlugin))
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.join('\n');
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return {source};
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};
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/**
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* Runs the provided code through the Babel linker plugin, if the file has the .js extension.
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*
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* @param file The absolute file path and its source to be transformed using the linker.
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* @param linkerPlugin The linker plugin to apply.
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* @returns The file's source content, which has been transformed using the linker if necessary.
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*/
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function applyLinker(file: {path: string; source: string}, linkerPlugin: PluginObj): string {
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if (!file.path.endsWith('.js') || !needsLinking(file.path, file.source)) {
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return file.source;
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}
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const result = transformSync(file.source, {
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filename: file.path,
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plugins: [linkerPlugin],
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parserOpts: {sourceType: 'unambiguous'},
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});
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if (result === null) {
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throw fail('Babel transform did not have output');
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}
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if (result.code == null) {
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throw fail('Babel transform result does not have any code');
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}
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return result.code;
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}
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// Update the function that will do the compiling with this specialised version that
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// runs the prelink and postlink parts of AOT compilation, to check it produces the
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// same result as a normal full AOT compile.
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setCompileFn(linkedCompile);
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