Import RubyGems trunk revision 1493.

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

lib/rubygems/commands/specification_command.rb

@@ -0,0 +1,72 @@
+require 'yaml'
+require 'rubygems/command'
+require 'rubygems/local_remote_options'
+require 'rubygems/version_option'
+require 'rubygems/source_info_cache'
+
+class Gem::Commands::SpecificationCommand < Gem::Command
+
+  include Gem::LocalRemoteOptions
+  include Gem::VersionOption
+
+  def initialize
+    super 'specification', 'Display gem specification (in yaml)',
+          :domain => :local, :version => Gem::Requirement.default
+
+    add_version_option('examine')
+    add_platform_option
+
+    add_option('--all', 'Output specifications for all versions of',
+               'the gem') do |value, options|
+      options[:all] = true
+    end
+
+    add_local_remote_options
+  end
+
+  def arguments # :nodoc:
+    "GEMFILE       name of gem to show the gemspec for"
+  end
+
+  def defaults_str # :nodoc:
+    "--local --version '#{Gem::Requirement.default}'"
+  end
+
+  def usage # :nodoc:
+    "#{program_name} [GEMFILE]"
+  end
+
+  def execute
+    specs = []
+    gem = get_one_gem_name
+
+    if local? then
+      source_index = Gem::SourceIndex.from_installed_gems
+      specs.push(*source_index.search(/\A#{gem}\z/, options[:version]))
+    end
+
+    if remote? then
+      alert_warning "Remote information is not complete\n\n"
+
+      Gem::SourceInfoCache.cache_data.each do |_,sice|
+        specs.push(*sice.source_index.search(gem, options[:version]))
+      end
+    end
+
+    if specs.empty? then
+      alert_error "Unknown gem '#{gem}'"
+      terminate_interaction 1
+    end
+
+    output = lambda { |spec| say spec.to_yaml; say "\n" }
+
+    if options[:all] then
+      specs.each(&output)
+    else
+      spec = specs.sort_by { |spec| spec.version }.last
+      output[spec]
+    end
+  end
+
+end
+