从Rake获取Ruby环境变量(Getting Ruby environment variables from Rake)

从Rake获取Ruby环境变量(Getting Ruby environment variables from Rake)

我有一个Rakefile，它具有部署或构建应用程序的任务。 这个Rakefile用于生产和开发。

我希望build任务知道环境是什么。 我可以在不运行参数的情况下完成这项工作吗？ 它可以通过环境变量来完成吗？

在开发过程中，我需要看起来像这样的任务：

task :build => :clean do compass compile -e development jekyll end

在生产中，像这样：

task :build => :clean do compass compile -e production jekyll end

I have a Rakefile which has tasks for deploying or building an application. This Rakefile is used in both production and development.

I would like the build task to know what the environment is. Can this be done without passing a parameter to the task when I run it? Can it be done with environment variables?

When in development, I need the task to look like this:

task :build => :clean do compass compile -e development jekyll end

And in production, like this:

task :build => :clean do compass compile -e production jekyll end

最满意答案

是的，你可以使用环境变量。 这是框架实现：

task :build do |t, args| puts "Current env is #{ENV['RAKE_ENV']}" end

用法：

% rake build Current env is % RAKE_ENV=development rake build Current env is development

Yes, you can use environment variables. Here's skeleton implementation:

task :build do |t, args| puts "Current env is #{ENV['RAKE_ENV']}" end

Usage:

% rake build Current env is % RAKE_ENV=development rake build Current env is development