1 files changed, 160 insertions, 0 deletions
diff --git a/ruby_1_9_3/lib/rubygems/commands/dependency_command.rb b/ruby_1_9_3/lib/rubygems/commands/dependency_command.rb
new file mode 100644
index 0000000000..67cbbc1d5e
--- /dev/null
+++ b/ruby_1_9_3/lib/rubygems/commands/dependency_command.rb
@@ -0,0 +1,160 @@
+require 'rubygems/command'
+require 'rubygems/local_remote_options'
+require 'rubygems/version_option'
+
+class Gem::Commands::DependencyCommand < Gem::Command
+
+  include Gem::LocalRemoteOptions
+  include Gem::VersionOption
+
+  def initialize
+    super 'dependency',
+          'Show the dependencies of an installed gem',
+          :version => Gem::Requirement.default, :domain => :local
+
+    add_version_option
+    add_platform_option
+    add_prerelease_option
+
+    add_option('-R', '--[no-]reverse-dependencies',
+               'Include reverse dependencies in the output') do
+      |value, options|
+      options[:reverse_dependencies] = value
+    end
+
+    add_option('-p', '--pipe',
+               "Pipe Format (name --version ver)") do |value, options|
+      options[:pipe_format] = value
+    end
+
+    add_local_remote_options
+  end
+
+  def arguments # :nodoc:
+    "GEMNAME       name of gem to show dependencies for"
+  end
+
+  def defaults_str # :nodoc:
+    "--local --version '#{Gem::Requirement.default}' --no-reverse-dependencies"
+  end
+
+  def usage # :nodoc:
+    "#{program_name} GEMNAME"
+  end
+
+  def execute
+    if options[:reverse_dependencies] and remote? and not local? then
+      alert_error 'Only reverse dependencies for local gems are supported.'
+      terminate_interaction 1
+    end
+
+    options[:args] << '' if options[:args].empty?
+
+    pattern = if options[:args].length == 1 and
+                 options[:args].first =~ /\A\/(.*)\/(i)?\z/m then
+                flags = $2 ? Regexp::IGNORECASE : nil
+                Regexp.new $1, flags
+              else
+                /\A#{Regexp.union(*options[:args])}/
+              end
+
+    # TODO: deprecate for real damnit
+    dependency = Gem::Deprecate.skip_during {
+      Gem::Dependency.new pattern, options[:version]
+    }
+    dependency.prerelease = options[:prerelease]
+
+    specs = []
+
+    specs.concat dependency.matching_specs if local?
+
+    if remote? and not options[:reverse_dependencies] then
+      fetcher = Gem::SpecFetcher.fetcher
+
+      # REFACTOR: fetcher.find_specs_matching => specs
+      specs_and_sources = fetcher.find_matching(dependency,
+                                                dependency.specific?, true,
+                                                dependency.prerelease?)
+
+      specs.concat specs_and_sources.map { |spec_tuple, source_uri|
+        fetcher.fetch_spec spec_tuple, URI.parse(source_uri)
+      }
+    end
+
+    if specs.empty? then
+      patterns = options[:args].join ','
+      say "No gems found matching #{patterns} (#{options[:version]})" if
+        Gem.configuration.verbose
+
+      terminate_interaction 1
+    end
+
+    specs = specs.uniq.sort
+
+    reverse = Hash.new { |h, k| h[k] = [] }
+
+    if options[:reverse_dependencies] then
+      specs.each do |spec|
+        reverse[spec.full_name] = find_reverse_dependencies spec
+      end
+    end
+
+    if options[:pipe_format] then
+      specs.each do |spec|
+        unless spec.dependencies.empty?
+          spec.dependencies.sort_by { |dep| dep.name }.each do |dep|
+            say "#{dep.name} --version '#{dep.requirement}'"
+          end
+        end
+      end
+    else
+      response = ''
+
+      specs.each do |spec|
+        response << print_dependencies(spec)
+        unless reverse[spec.full_name].empty? then
+          response << "  Used by\n"
+          reverse[spec.full_name].each do |sp, dep|
+            response << "    #{sp} (#{dep})\n"
+          end
+        end
+        response << "\n"
+      end
+
+      say response
+    end
+  end
+
+  def print_dependencies(spec, level = 0)
+    response = ''
+    response << '  ' * level + "Gem #{spec.full_name}\n"
+    unless spec.dependencies.empty? then
+      spec.dependencies.sort_by { |dep| dep.name }.each do |dep|
+        response << '  ' * level + "  #{dep}\n"
+      end
+    end
+    response
+  end
+
+  ##
+  # Returns an Array of [specification, dep] that are satisfied by +spec+.
+
+  def find_reverse_dependencies(spec)
+    result = []
+
+    Gem::Specification.each do |sp|
+      sp.dependencies.each do |dep|
+        dep = Gem::Dependency.new(*dep) unless Gem::Dependency === dep
+
+        if spec.name == dep.name and
+           dep.requirement.satisfied_by?(spec.version) then
+          result << [sp.full_name, dep]
+        end
+      end
+    end
+
+    result
+  end
+
+end
+