我知道可以在Ruby gem中的许多地方定义Rake任务:
tasks/*.rake
lib/tasks/*.rake
我已经读过,当要在gem本身执行任务时,应该使用前两个。当希望公开任务时,似乎应该选择第三种选择。
网上有很多教程演示了使用Rails从gem加载Rake任务的各种方法,即利用Rails::RailTie
。
但是,我想找到一种在不需要Rails的情况下在另一个gem中使用依赖gem的任务的方法。
有一个简单的解决方案吗?有人会善意地描述正确的方法,或概述哪些方法可行?
我尝试创建一个文件bin/my-gem
,以便在系统上使用my-gem
执行Rake任务。我把以下内容放在里面;
#!/usr/bin/env ruby
require 'rubygems'
require 'rake'
task=ARGV[0]
spec = Gem::Specification.find_by_name('dsi_core')
Dir["#{spec.gem_dir}/lib/tasks/*.rake"].each {|file| puts file and Rake::load_rakefile(file)}
Rake::Task.clear # Avoid tasks being loaded several times in dev mode
Rake::Task[task].reenable # Support re-execution of a task.
Rake::Task[task].invoke
部分内容基于this SO post。
可悲的是,我做错了,因为在安装gem之后运行my-gem mytask
mytask
并在lib/test.rake
中定义,然后输出以下内容:
/var/lib/gems/1.8/gems/rake-0.9.2/lib/rake/task_manager.rb:49:in `[]': Don't know how to build task 'mytest' (RuntimeError)
from /var/lib/gems/1.8/gems/rake-0.9.2/lib/rake/task.rb:298:in `[]'
from /var/lib/gems/1.8/gems/my_gem-0.0.1/bin/my_gem:8
from /usr/local/bin/my_gem:19:in `load'
from /usr/local/bin/my_gem:19
答案 0 :(得分:13)
我找到了解决方案here的正文。我修改了它以支持带参数的任务规范,并增加了对cucumber
的支持。
所以..
在您的宝石中创建bin/my_gem
将此帖子底部的脚本粘贴到其中。有关示例用法,请参阅注释。
您的rake
任务必须位于Rakefile
。
或者,添加您的任务,例如到lib/tasks/*.rake
然后将以下内容添加到Rakefile
:
Dir.glob('lib/tasks/*.rake').each {|r| import r}
这是秘诀:
#!/usr/bin/env ruby
# Run rake tasks and cucumber features
# from my_gem once it's installed.
#
# Example:
#
# my_gem rake some-task
# my_gem rake some-task[args]
# my_gem cucumber feature1 feature2
#
# Note: cucumber features have '.feature' appended automatically,
# no need for you to do it ;)
#
# Author:: N David Brown
gem_dir = File.expand_path("..",File.dirname(__FILE__))
$LOAD_PATH.unshift gem_dir# Look in gem directory for resources first.
exec_type = ARGV[0]
if exec_type == 'rake' then
require 'rake'
require 'pp'
pwd=Dir.pwd
Dir.chdir(gem_dir) # We'll load rakefile from the gem's dir.
Rake.application.init
Rake.application.load_rakefile
Dir.chdir(pwd) # Revert to original pwd for any path args passed to task.
Rake.application.invoke_task(ARGV[1])
elsif exec_type == 'cucumber' then
require 'cucumber'
features = ARGV[1,].map{|feature| "#{gem_dir}/features/#{feature}.feature"}.join(' ')
runtime = Cucumber::Runtime.new
runtime.load_programming_language('rb')
pwd=Dir.pwd
Dir.chdir(gem_dir) # We'll load features from the gem's dir.
Cucumber::Cli::Main.new([features]).execute!(runtime)
Dir.chdir(pwd) # Revert to original pwd for convenience.
end
宾果! : - )
答案 1 :(得分:2)
这篇文章给了我一些提示,但也许对其他人来说,我遇到了一些依赖性问题。我终于找到了如何用bin / binstub做这个,而不需要rakefile。 My solution is posted on another SO question.