例如https://github.com/locomotivecms/wagon/blob/master/rakefile#l23
desc 'build the gem and release it to rubygems.org'
task release: :gem do
sh "gem push pkg/locomotivecms_wagon-#{gemspec.version}.gem"
end
当我运行rake --task
时,它返回为描述。
rake clobber_package # Remove package products
rake gem # Build the gem file locomotivecms_wagon-2.2.0.beta1.gem
rake package # Build all the packages
rake release # build the gem and release it to rubygems.org
rake repackage # Force a rebuild of the package files
rake spec # Run RSpec code examples
rake spec:integration # Run RSpec code examples
rake spec:unit # Run RSpec code examples
但是我不明白他们如何进行描述,不是每次描述打电话时都会替换它吗?他们如何知道特定描述属于特定任务?
想象具有状态(非常幼稚的实现)的简单DSL :
@tasks = []
@current = nil
def desc text
@current = Task.new(desc: text)
end
def task params, &cb
@current.update(params)
yield
....
@tasks << @current
@current = nil
end
上面的代码需要其他检查等,但是想法是:状态DSL用其描述收集任务。