class ParallelSpecs

def self.color
  ($stdout.tty? ? 'RSPEC_COLOR=1 ; export RSPEC_COLOR ;' : '')
end

def self.executable
  cmd = if File.file?("script/spec")
    "script/spec"
  elsif bundler_enabled?
    cmd = (run("bundle show rspec") =~ %r{/rspec-1[^/]+$} ? "spec" : "rspec")
    "bundle exec #{cmd}"
  else
    %w[spec rspec].detect{|cmd| system "#{cmd} --version > /dev/null 2>&1" }
  end
  cmd or raise("Can't find executables rspec or spec")
end

def self.run(cmd)
  `#{cmd}`
end

def self.run_tests(test_files, process_number, options)
  exe = executable # its expensive with bundler, so do not call it twice
  cmd = "#{color} #{exe} #{options} #{spec_opts(exe)} #{test_files*' '}"
  execute_command(cmd, process_number)
end

def self.spec_opts(executable)
  opts = ['spec/parallel_spec.opts', 'spec/spec.opts'].detect{|f| File.file?(f) }
  return unless opts
  if executable =~ /\brspec\b/
    # RSpec2 does not handle -O, so we inline the options
    File.read(opts).tr("\n", ' ')
  else
    "-O #{opts}"
  end
end

def self.test_suffix
  "_spec.rb"
end