1 files changed, 145 insertions, 0 deletions
diff --git a/jni/ruby/lib/rubygems/commands/specification_command.rb b/jni/ruby/lib/rubygems/commands/specification_command.rb
new file mode 100644
index 0000000..3bc02a9
--- /dev/null
+++ b/jni/ruby/lib/rubygems/commands/specification_command.rb
@@ -0,0 +1,145 @@
+require 'rubygems/command'
+require 'rubygems/local_remote_options'
+require 'rubygems/version_option'
+require 'rubygems/package'
+
+class Gem::Commands::SpecificationCommand < Gem::Command
+
+  include Gem::LocalRemoteOptions
+  include Gem::VersionOption
+
+  def initialize
+    Gem.load_yaml
+
+    super 'specification', 'Display gem specification (in yaml)',
+          :domain => :local, :version => Gem::Requirement.default,
+          :format => :yaml
+
+    add_version_option('examine')
+    add_platform_option
+    add_prerelease_option
+
+    add_option('--all', 'Output specifications for all versions of',
+               'the gem') do |value, options|
+      options[:all] = true
+    end
+
+    add_option('--ruby', 'Output ruby format') do |value, options|
+      options[:format] = :ruby
+    end
+
+    add_option('--yaml', 'Output YAML format') do |value, options|
+      options[:format] = :yaml
+    end
+
+    add_option('--marshal', 'Output Marshal format') do |value, options|
+      options[:format] = :marshal
+    end
+
+    add_local_remote_options
+  end
+
+  def arguments # :nodoc:
+    <<-ARGS
+GEMFILE       name of gem to show the gemspec for
+FIELD         name of gemspec field to show
+    ARGS
+  end
+
+  def defaults_str # :nodoc:
+    "--local --version '#{Gem::Requirement.default}' --yaml"
+  end
+
+  def description # :nodoc:
+    <<-EOF
+The specification command allows you to extract the specification from
+a gem for examination.
+
+The specification can be output in YAML, ruby or Marshal formats.
+
+Specific fields in the specification can be extracted in YAML format:
+
+  $ gem spec rake summary
+  --- Ruby based make-like utility.
+  ...
+
+    EOF
+  end
+
+  def usage # :nodoc:
+    "#{program_name} [GEMFILE] [FIELD]"
+  end
+
+  def execute
+    specs = []
+    gem = options[:args].shift
+
+    unless gem then
+      raise Gem::CommandLineError,
+            "Please specify a gem name or file on the command line"
+    end
+
+    case v = options[:version]
+    when String
+      req = Gem::Requirement.create v
+    when Gem::Requirement
+      req = v
+    else
+      raise Gem::CommandLineError, "Unsupported version type: '#{v}'"
+    end
+
+    if !req.none? and options[:all]
+      alert_error "Specify --all or -v, not both"
+      terminate_interaction 1
+    end
+
+    if options[:all]
+      dep = Gem::Dependency.new gem
+    else
+      dep = Gem::Dependency.new gem, req
+    end
+
+    field = get_one_optional_argument
+
+    raise Gem::CommandLineError, "--ruby and FIELD are mutually exclusive" if
+      field and options[:format] == :ruby
+
+    if local? then
+      if File.exist? gem then
+        specs << Gem::Package.new(gem).spec rescue nil
+      end
+
+      if specs.empty? then
+        specs.push(*dep.matching_specs)
+      end
+    end
+
+    if remote? then
+      dep.prerelease = options[:prerelease]
+      found, _ = Gem::SpecFetcher.fetcher.spec_for_dependency dep
+
+      specs.push(*found.map { |spec,| spec })
+    end
+
+    if specs.empty? then
+      alert_error "No gem matching '#{dep}' found"
+      terminate_interaction 1
+    end
+
+    unless options[:all] then
+      specs = [specs.max_by { |s| s.version }]
+    end
+
+    specs.each do |s|
+      s = s.send field if field
+
+      say case options[:format]
+          when :ruby then s.to_ruby
+          when :marshal then Marshal.dump s
+          else s.to_yaml
+          end
+
+      say "\n"
+    end
+  end
+end