Search code examples
ruby-on-railsrubyrake

Specifying a task-dependency in a rake rule

I have a rake rule transforming files that also needs to depend on the :environment (meta-)task. However, I keep running into errors. The rule looks as follows:

task :parse => SOURCE_FILES.ext(".md")
rule ".md" => ->(f){ source_for_md(f) } do |t|
  `do stuff ${t.source}`
end

I have tried rule ".md" => [:environment, ->(f){ source_for_md(f)] }

which results in the error:

Don't know how to handle rule dependent: :environment

I have also tried to define the depency upstream in the :parse task:

task parse: [:environment, SOURCE_FILES.ext(".md")]

... with no luck.

Solution

  • A workaround that is only slightly inelegant: moving the dependency a further level up in the chain works:

    task do_parse: [:environment, :parse]
task :parse => SOURCE_FILES.ext(".md")
rule ".md" => ->(f){ source_for_md(f) } do |t|
  `do stuff ${t.source}`
end