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refactor(@ngtools/webpack): support file replacement without copying

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This commit is contained in:
Charles Lyding 2018-07-09 09:18:40 -04:00 committed by Hans
parent 0bef5aa4be
commit 0a8a797268
1 changed files with 12 additions and 12 deletions
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24
packages/ngtools/webpack/src/angular_compiler_plugin.ts
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@ -6,6 +6,7 @@
* found in the LICENSE file at https://angular.io/license
*/
import { dirname, normalize, resolve, virtualFs } from '@angular-devkit/core';
import { NodeJsSyncHost } from '@angular-devkit/core/node';
import { ChildProcess, ForkOptions, fork } from 'child_process';
import * as fs from 'fs';
import * as path from 'path';
@ -288,11 +289,21 @@ export class AngularCompilerPlugin {
this._contextElementDependencyConstructor = options.contextElementDependencyConstructor
|| require('webpack/lib/dependencies/ContextElementDependency');
let host: virtualFs.Host<fs.Stats> = options.host || new NodeJsSyncHost();
if (options.hostReplacementPaths) {
const aliasHost = new virtualFs.AliasHost(host);
for (const from in options.hostReplacementPaths) {
aliasHost.aliases.set(normalize(from), normalize(options.hostReplacementPaths[from]));
}
host = aliasHost;
}
// Create the webpack compiler host.
const webpackCompilerHost = new WebpackCompilerHost(
this._compilerOptions,
this._basePath,
this._options.host,
host,
);
webpackCompilerHost.enableCaching();
@ -306,17 +317,6 @@ export class AngularCompilerPlugin {
tsHost: webpackCompilerHost,
}) as CompilerHost & WebpackCompilerHost;
// Override some files in the FileSystem with paths from the actual file system.
if (this._options.hostReplacementPaths) {
for (const filePath of Object.keys(this._options.hostReplacementPaths)) {
const replacementFilePath = this._options.hostReplacementPaths[filePath];
const content = this._compilerHost.readFile(replacementFilePath);
if (content) {
this._compilerHost.writeFile(filePath, content, false);
}
}
}
// Resolve mainPath if provided.
if (options.mainPath) {
this._mainPath = this._compilerHost.resolve(options.mainPath);