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Support multiple environments in the same build

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评估

难度
5/5
预计耗时
一周以上
新手友好度
25/100
Issue 类型
功能
描述清晰度
基本清楚
活跃度
停滞
技术栈
angular, typescript

调研方向

从 angular-cli 对 --env 选项的处理以及构建配置入口开始。重现 issue 中描述的 locale 和浏览器配置文件用例,然后定义多个环境应如何组合,而不要求单独声明每个环境对。

由索引模型根据 Issue 内容生成。

描述

area: @angular-devkit/build-angular area: docs devkit/build-angular:browser freq3: high severity2: inconvenient type: faq type: RFC / discussion / question

Please provide us with the following information:

OS?

Mac OSX (Sierra)

Versions.
angular-cli: 1.0.0-beta.24
node: 6.9.2
os: darwin x64
@angular/common: 2.4.1
@angular/compiler: 2.4.1
@angular/core: 2.4.1
@angular/forms: 2.4.1
@angular/http: 2.4.1
@angular/platform-browser: 2.4.1
@angular/platform-browser-dynamic: 2.4.1
@angular/router: 3.4.1
@angular/compiler-cli: 2.4.1
This is a feature request

I started internationalizing my application, and I met the following problem: when generating the bundle for the French locale (for example), I should include the locale-specific fr.js script of moment.js. Other libraries could also provide locale-specific JS files, or could need code that is specific to that locale (to internationalize a datepicker, for example).

I think the best way to do that would be to create an 'fr' environment file, simply containing

import 'moment/locale/fr.js';

and to use --env fr. Unfortunately, there doesn't seem to be a way to specify two different environments. And I wouldn't like to create a dev-fr environment, a prod-fr environment, a dev-en environment, a prod-en environment, etc.

Another use-case for that would be to create separate bundles for browsers, containing the polyfills that are needed for different browsers, and thus be able to generate a production bundle, for the French locale, and the chrome browser. I'm sure other use-cases could exist.

So I think it would be nice if angular-cli allowed specifying several environments. This is BTW a feature that exists in other build tools (like Maven profiles, or gradle properties, for example)

What do you think? Is there another nice way to achieve that?

主要语言
TypeScript
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