I'm using rake to help compile Coffeescript for a Chrome extension I'm writing.
My Rakefile looks like this:
COFFEE = FileList['src/*.coffee']
JS = COFFEE.ext 'js'
directory 'extension'
rule '.js' => ['.coffee', 'extension'] do |t|
`coffee -c -o extension #{t.source}`
end
desc "Build the extension in the 'extension' directory"
task :build => ['extension', JS] do
cp File.join('src', 'manifest.json'), 'extension'
end
When I only have one .coffee file in my src directory, there's no problem. But as soon as I have more than one .coffee files it errors:
$ rake build
> rake aborted!
> Don't know how to build task 'src/app.js src/background.js'
>
> Tasks: TOP => build
> (See full trace by running task with --trace)
Is it possible to specify a FileList as a dependency? How else would I tell rake that I want all my Coffeescript files compiled durring the build task?
Rake’s dependency list is an Array of task names. When you use a FileList as one of its elements, you nest arrays – effectively, this:
task :build => ['extension', ['src/app.js', 'src/background.js']] do
Rake just uses the String representation of all passed dependency Array elements, which is why it complains about being unable to build a 'src/app.js src/background.js' task (note how this is one string).
Splatting your FileList (or flattening the dependency Array) will solve the issue, i.e.:
task :build => ['extension', *JS] do
or
task :build => ['extension', JS].flatten do