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我试图制定一个取决于另一个任务的rake规则。它的工作原理如下图所示,如果我只用任务:具有任务依赖关系的Rake规则
task :foo do
@iv = 42
end
task :bar => :foo do
p @iv
end
Rake::Task[:bar].invoke
结果:
42
我希望能够使用规则,所以我可以使用正则表达式。但我发现了一个错误:
task :foo do
@iv = 42
end
rule /bar/ => :foo do
p @iv
end
Rake::Task["bar"].invoke
结果:
/Users/max/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task_manager.rb:284:in `block in make_sources': Don't know how to handle rule dependent: :foo (RuntimeError)
from /Users/max/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task_manager.rb:267:in `map'
from /Users/max/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task_manager.rb:267:in `make_sources'
from /Users/max/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task_manager.rb:245:in `attempt_rule'
from /Users/max/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task_manager.rb:130:in `block in enhance_with_matching_rule'
from /Users/max/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task_manager.rb:128:in `each'
from /Users/max/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task_manager.rb:128:in `enhance_with_matching_rule'
from /Users/max/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task_manager.rb:56:in `[]'
from /Users/max/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task.rb:361:in `[]'
from baz.rb:63:in `<main>'
如何使用依赖于其他任务的规则?
编辑:
由于此规则下面提到需要它的依赖作为一个字符串:
task :foo do
@iv = 42
end
rule /bar/ => "foo" do
p @iv
end
Rake::Task["bar"].invoke
#=> 42