# frozen_string_literal: true require 'rubygems/command' require 'rubygems/package' class Gem::Commands::BuildCommand < Gem::Command def initialize super 'build', 'Build a gem from a gemspec' add_option '--force', 'skip validation of the spec' do |value, options| options[:force] = true end end def arguments # :nodoc: "GEMSPEC_FILE gemspec file name to build a gem for" end def description # :nodoc: <<-EOF The build command allows you to create a gem from a ruby gemspec. The best way to build a gem is to use a Rakefile and the Gem::PackageTask which ships with RubyGems. The gemspec can either be created by hand or extracted from an existing gem with gem spec: $ gem unpack my_gem-1.0.gem Unpacked gem: '.../my_gem-1.0' $ gem spec my_gem-1.0.gem --ruby > my_gem-1.0/my_gem-1.0.gemspec $ cd my_gem-1.0 [edit gem contents] $ gem build my_gem-1.0.gemspec EOF end def usage # :nodoc: "#{program_name} GEMSPEC_FILE" end def execute gemspec = get_one_gem_name unless File.exist? gemspec gemspec += '.gemspec' if File.exist? gemspec + '.gemspec' end if File.exist? gemspec then spec = Gem::Specification.load gemspec if spec then Gem::Package.build spec, options[:force] else alert_error "Error loading gemspec. Aborting." terminate_interaction 1 end else alert_error "Gemspec file not found: #{gemspec}" terminate_interaction 1 end end end