require 'pathname'

module Overcommit::Hook::PreCommit
  # Ensure the livescript source files are compiled.
  # Also make sure they're included in the commit.
  class EnsureLivescriptCompiled < Base
    def compiled_path ls
      ls.sub('livescript/', 'public/js/').sub(/\.ls$/, '.js')
    end

    def relative path
      Pathname.new(path).relative_path_from Pathname.getwd
    end

    def check_file lsfile
      compiled = compiled_path lsfile

      return "#{relative compiled}: older than #{relative lsfile}.
          $ ./compile_ls &" if File.stat(lsfile) > File.stat(compiled)

      return "#{relative lsfile}: compiled file not added.
          $ git add #{relative compiled}" unless modified_files.include? compiled
    end

    def run
      errs = applicable_files.map(&method(:check_file)).compact
      return :bad, errs.join('\n') unless errs.empty?
      :good
    end
  end
end