Import RubyGems trunk revision 1493.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13862 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/builder.rb

@@ -0,0 +1,81 @@
+#--
+# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
+# All rights reserved.
+# See LICENSE.txt for permissions.
+#++
+
+module Gem
+
+  ##
+  # The Builder class processes RubyGem specification files
+  # to produce a .gem file.
+  #
+  class Builder
+  
+    include UserInteraction
+    ##
+    # Constructs a builder instance for the provided specification
+    #
+    # spec:: [Gem::Specification] The specification instance
+    #
+    def initialize(spec)
+      require "yaml"
+      require "rubygems/package"
+      require "rubygems/security"
+
+      @spec = spec
+    end
+
+    ##
+    # Builds the gem from the specification.  Returns the name of the file
+    # written.
+    #
+    def build
+      @spec.mark_version
+      @spec.validate
+      @signer = sign
+      write_package
+      say success
+      @spec.file_name
+    end
+    
+    def success
+      <<-EOM
+  Successfully built RubyGem
+  Name: #{@spec.name}
+  Version: #{@spec.version}
+  File: #{@spec.full_name+'.gem'}
+EOM
+    end
+
+    private
+
+    def sign
+      # if the signing key was specified, then load the file, and swap
+      # to the public key (TODO: we should probably just omit the
+      # signing key in favor of the signing certificate, but that's for
+      # the future, also the signature algorithm should be configurable)
+      signer = nil
+      if @spec.respond_to?(:signing_key) && @spec.signing_key
+        signer = Gem::Security::Signer.new(@spec.signing_key, @spec.cert_chain)
+        @spec.signing_key = nil
+        @spec.cert_chain = signer.cert_chain.map { |cert| cert.to_s }
+      end
+      signer
+    end
+
+    def write_package
+      Package.open(@spec.file_name, "w", @signer) do |pkg|
+        pkg.metadata = @spec.to_yaml
+        @spec.files.each do |file|
+          next if File.directory? file
+          pkg.add_file_simple(file, File.stat(@spec.file_name).mode & 0777,
+                              File.size(file)) do |os|
+              os.write File.open(file, "rb"){|f|f.read}
+          end
+        end
+      end
+    end
+  end
+end
+