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/fetch_command.rb

@@ -0,0 +1,62 @@
+require 'rubygems/command'
+require 'rubygems/local_remote_options'
+require 'rubygems/version_option'
+require 'rubygems/source_info_cache'
+
+class Gem::Commands::FetchCommand < Gem::Command
+
+  include Gem::LocalRemoteOptions
+  include Gem::VersionOption
+
+  def initialize
+    super 'fetch', 'Download a gem and place it in the current directory'
+
+    add_bulk_threshold_option
+    add_proxy_option
+    add_source_option
+
+    add_version_option
+    add_platform_option
+  end
+
+  def arguments # :nodoc:
+    'GEMNAME       name of gem to download'
+  end
+
+  def defaults_str # :nodoc:
+    "--version '#{Gem::Requirement.default}'"
+  end
+
+  def usage # :nodoc:
+    "#{program_name} GEMNAME [GEMNAME ...]"
+  end
+
+  def execute
+    version = options[:version] || Gem::Requirement.default
+
+    gem_names = get_all_gem_names
+
+    gem_names.each do |gem_name|
+      dep = Gem::Dependency.new gem_name, version
+      specs_and_sources = Gem::SourceInfoCache.search_with_source dep, true
+
+      specs_and_sources.sort_by { |spec,| spec.version }
+
+      spec, source_uri = specs_and_sources.last
+
+      gem_file = "#{spec.full_name}.gem"
+
+      gem_path = File.join source_uri, 'gems', gem_file
+
+      gem = Gem::RemoteFetcher.fetcher.fetch_path gem_path
+
+      File.open gem_file, 'wb' do |fp|
+        fp.write gem
+      end
+
+      say "Downloaded #{gem_file}"
+    end
+  end
+
+end
+