1 files changed, 60 insertions, 0 deletions
diff --git a/jni/ruby/lib/rubygems/commands/build_command.rb b/jni/ruby/lib/rubygems/commands/build_command.rb
new file mode 100644
index 0000000..d975429
--- /dev/null
+++ b/jni/ruby/lib/rubygems/commands/build_command.rb
@@ -0,0 +1,60 @@
+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
+
+    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
+