feat(@angular-devkit/build-webpack): provide output path in builder results

This change adds the output path for the Webpack build directly to the result of the builder. This removes one of the reasons for using the Webpack JSON stats object which is expensive to generate.

Author: clydin

packages/angular_devkit/build_webpack/src/webpack-dev-server/index.ts

@@ -72,7 +72,7 @@ export function runWebpackDevServer(
   return createWebpack({ ...config, watch: false }).pipe(
     switchMap(webpackCompiler => new Observable<DevServerBuildOutput>(obs => {
       const server = createWebpackDevServer(webpackCompiler, devServerConfig);
-      let result: DevServerBuildOutput;
+      let result: Partial<DevServerBuildOutput>;
 
       webpackCompiler.hooks.done.tap('build-webpack', (stats) => {
         // Log stats.
@@ -82,6 +82,7 @@ export function runWebpackDevServer(
           ...result,
           emittedFiles: getEmittedFiles(stats.compilation),
           success: !stats.hasErrors(),
+          outputPath: stats.compilation.outputOptions.path,
         } as unknown as DevServerBuildOutput);
       });
 

packages/angular_devkit/build_webpack/src/webpack/index.ts

@@ -26,6 +26,7 @@ export interface WebpackFactory {
 export type BuildResult = BuilderOutput & {
   emittedFiles?: EmittedFiles[];
   webpackStats?: webpack.Stats.ToJsonOutput;
+  outputPath: string;
 };
 
 export function runWebpack(
@@ -77,6 +78,7 @@ export function runWebpack(
           success: !stats.hasErrors(),
           webpackStats: shouldProvideStats ? stats.toJson() : undefined,
           emittedFiles: getEmittedFiles(stats.compilation),
+          outputPath: stats.compilation.outputOptions.path,
         } as unknown as BuildResult);
 
         if (!config.watch) {