# class Gem::Ext::Builder

### Public Class Methods

class_name() click to toggle source

    # File lib/rubygems/ext/builder.rb, line 15
    def self.class_name
      name =~ /Ext::(.*)Builder/
      $1.downcase
    end

make(dest_path, results, make_dir = Dir.pwd, sitedir = nil, targets = ["clean", "", "install"]) click to toggle source

    # File lib/rubygems/ext/builder.rb, line 20
    def self.make(dest_path, results, make_dir = Dir.pwd, sitedir = nil, targets = ["clean", "", "install"])
      unless File.exist? File.join(make_dir, "Makefile")
        raise Gem::InstallError, "Makefile not found"
      end

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

      # The installation of the bundled gems is failed when DESTDIR is empty in mswin platform.
      destdir = (/\bnmake/i !~ make_program_name || ENV["DESTDIR"] && ENV["DESTDIR"] != "") ? "DESTDIR=%s" % ENV["DESTDIR"] : ""

      env = [destdir]

      if sitedir
        env << "sitearchdir=%s" % sitedir
        env << "sitelibdir=%s" % sitedir
      end

      targets.each do |target|
        # Pass DESTDIR via command line to override what's in MAKEFLAGS
        cmd = [
          *make_program,
          *env,
          target,
        ].reject(&:empty?)
        begin
          run(cmd, results, "make #{target}".rstrip, make_dir)
        rescue Gem::InstallError
          raise unless target == "clean" # ignore clean failure
        end
      end
    end

new(spec, build_args = spec.build_args) click to toggle source

Creates a new extension builder for `spec`. If the `spec` does not yet have build arguments, saved, set `build_args` which is an ARGV-style array.

    # File lib/rubygems/ext/builder.rb, line 111
    def initialize(spec, build_args = spec.build_args)
      @spec       = spec
      @build_args = build_args
      @gem_dir    = spec.full_gem_path

      @ran_rake = false
    end

run(command, results, command_name = nil, dir = Dir.pwd, env = {}) { |status, results| ... } click to toggle source

    # File lib/rubygems/ext/builder.rb, line 58
    def self.run(command, results, command_name = nil, dir = Dir.pwd, env = {})
      verbose = Gem.configuration.really_verbose

      begin
        rubygems_gemdeps, ENV["RUBYGEMS_GEMDEPS"] = ENV["RUBYGEMS_GEMDEPS"], nil
        if verbose
          puts("current directory: #{dir}")
          p(command)
        end
        results << "current directory: #{dir}"
        require "shellwords"
        results << command.shelljoin

        require "open3"
        # Set $SOURCE_DATE_EPOCH for the subprocess.
        build_env = { "SOURCE_DATE_EPOCH" => Gem.source_date_epoch_string }.merge(env)
        output, status = begin
                           Open3.capture2e(build_env, *command, :chdir => dir)
                         rescue => error
                           raise Gem::InstallError, "#{command_name || class_name} failed#{error.message}"
                         end
        if verbose
          puts output
        else
          results << output
        end
      ensure
        ENV["RUBYGEMS_GEMDEPS"] = rubygems_gemdeps
      end

      unless status.success?
        results << "Building has failed. See above output for more information on the failure." if verbose
      end

      yield(status, results) if block_given?

      unless status.success?
        exit_reason =
          if status.exited?
            ", exit code #{status.exitstatus}"
          elsif status.signaled?
            ", uncaught signal #{status.termsig}"
          end

        raise Gem::InstallError, "#{command_name || class_name} failed#{exit_reason}"
      end
    end

### Public Instance Methods

build_extensions() click to toggle source

Builds extensions. Valid types of extensions are extconf.rb files, configure scripts and rakefiles or mkrf_conf files.

    # File lib/rubygems/ext/builder.rb, line 187
    def build_extensions
      return if @spec.extensions.empty?

      if @build_args.empty?
        say "Building native extensions. This could take a while..."
      else
        say "Building native extensions with: '#{@build_args.join ' '}'"
        say "This could take a while..."
      end

      dest_path = @spec.extension_dir

      require "fileutils"
      FileUtils.rm_f @spec.gem_build_complete_path

      @spec.extensions.each do |extension|
        break if @ran_rake

        build_extension extension, dest_path
      end

      FileUtils.touch @spec.gem_build_complete_path
    end