fix(build): use config output path as default

Author: filipesilva

packages/angular-cli/commands/build.ts

@@ -25,8 +25,8 @@ const BuildCommand = Command.extend({
       aliases: ['t', { 'dev': 'development' }, { 'prod': 'production' }]
     },
     { name: 'environment',    type: String,  default: '', aliases: ['e'] },
-    { name: 'output-path',    type: 'Path',  default: 'dist/',       aliases: ['o'] },
-    { name: 'watch',          type: Boolean, default: false,         aliases: ['w'] },
+    { name: 'output-path',    type: 'Path',  default: null, aliases: ['o'] },
+    { name: 'watch',          type: Boolean, default: false, aliases: ['w'] },
     { name: 'watcher',        type: String },
     { name: 'suppress-sizes', type: Boolean, default: false },
     { name: 'base-href',      type: String,  default: null, aliases: ['bh'] },

packages/angular-cli/commands/serve.ts

@@ -22,7 +22,6 @@ export interface ServeTaskOptions {
   liveReloadLiveCss?: boolean;
   target?: string;
   environment?: string;
-  outputPath?: string;
   ssl?: boolean;
   sslKey?: string;
   sslCert?: string;

packages/angular-cli/tasks/build-webpack.ts

@@ -5,22 +5,24 @@ import * as webpack from 'webpack';
 import { BuildOptions } from '../commands/build';
 import { NgCliWebpackConfig } from '../models/webpack-config';
 import { webpackOutputOptions } from '../models/';
+import { CliConfig } from '../models/config';
 
 // Configure build and output;
 let lastHash: any = null;
 
 export default <any>Task.extend({
-  // Options: String outputPath
   run: function (runTaskOptions: BuildOptions) {
 
     const project = this.cliProject;
 
-    rimraf.sync(path.resolve(project.root, runTaskOptions.outputPath));
+    const outputDir = runTaskOptions.outputPath || CliConfig.fromProject().config.apps[0].outDir;
+    rimraf.sync(path.resolve(project.root, outputDir));
+
     const config = new NgCliWebpackConfig(
       project,
       runTaskOptions.target,
       runTaskOptions.environment,
-      runTaskOptions.outputPath,
+      outputDir,
       runTaskOptions.baseHref
     ).config;