class ParallelSpecs

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.rspec_1_color
  'RSPEC_COLOR=1 ; export RSPEC_COLOR ;' if $stdout.tty?
end

def self.rspec_2_color
  '--tty ' if $stdout.tty?
end

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

def self.run_tests(test_files, process_number, options)
  exe = executable # expensive, so we cache
  version = (exe =~ /\brspec\b/ ? 2 : 1)
  cmd = "#{rspec_1_color if version == 1}#{exe} #{options[:test_options]} #{rspec_2_color if version == 2}#{spec_opts(version)} #{test_files*' '}"
  execute_command(cmd, process_number, options)
end

def self.spec_opts(rspec_version)
  options_file = ['spec/parallel_spec.opts', 'spec/spec.opts'].detect{|f| File.file?(f) }
  return unless options_file
  if rspec_version == 2
    # does not handle -O, so we inline the options
    File.read(options_file).tr("\n", ' ')
  else
    "-O #{options_file}"
  end
end

def self.test_suffix
  "_spec.rb"
end