class Gem::Ext::Builder

# File lib/rubygems/ext/builder.rb, line 9
def self.class_name
  name =~ /Ext::(.*)Builder/
  $1.downcase
end

# File lib/rubygems/ext/builder.rb, line 14
def self.make(dest_path, results)
  unless File.exist? 'Makefile' then
    raise Gem::InstallError, "Makefile not found:\n\n#{results.join "\n"}"
  end

  # try to find make program from Ruby configure arguments first
  RbConfig::CONFIG['configure_args'] =~ /with-make-prog\=(\w+)/
  make_program = $1 || ENV['MAKE'] || ENV['make']
  unless make_program then
    make_program = (/mswin/ =~ RUBY_PLATFORM) ? 'nmake' : 'make'
  end

  destdir = '"DESTDIR=%s"' % ENV['DESTDIR'] if RUBY_VERSION > '2.0'

  ['', 'install'].each do |target|
    # Pass DESTDIR via command line to override what's in MAKEFLAGS
    cmd = [
      make_program,
      destdir,
      target
    ].join(' ').rstrip
    run(cmd, results, "make #{target}".rstrip)
  end
end

# File lib/rubygems/ext/builder.rb, line 39
def self.redirector
  '2>&1'
end

# File lib/rubygems/ext/builder.rb, line 43
def self.run(command, results, command_name = nil)
  verbose = Gem.configuration.really_verbose

  begin
    # TODO use Process.spawn when ruby 1.8 support is dropped.
    rubygems_gemdeps, ENV['RUBYGEMS_GEMDEPS'] = ENV['RUBYGEMS_GEMDEPS'], nil
    if verbose
      puts(command)
      system(command)
    else
      results << command
      results << %x`#{command} #{redirector}`
    end
  ensure
    ENV['RUBYGEMS_GEMDEPS'] = rubygems_gemdeps
  end

  unless $?.success? then
    results << "Building has failed. See above output for more information on the failure." if verbose
    raise Gem::InstallError, "#{command_name || class_name} failed:\n\n#{results.join "\n"}"
  end
end