class ParallelTests::RSpec::Runner

def self.determine_executable
  cmd = if File.file?("script/spec")
    "script/spec"
  elsif ParallelTests.bundler_enabled?
    cmd = (run("bundle show rspec-core") =~ %r{Could not find gem.*} ? "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
  if $stdout.tty?
    {'RSPEC_COLOR' => "1"}
  else
    {}
  end
end

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

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

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

def self.runtime_log
  'tmp/parallel_runtime_rspec.log'
end

def self.spec_opts
  options_file = ['.rspec_parallel', 'spec/parallel_spec.opts', 'spec/spec.opts'].detect{|f| File.file?(f) }
  return unless options_file
  "-O #{options_file}"
end

def self.test_file_name
  "spec"
end

def self.test_suffix
  "_spec.rb"
end