How to use specification method of Gem Package

Best Rr_ruby code snippet using Gem.specification

gem_dependency.rb

Source:gem_dependency.rb

...27      directory_name_parts = File.basename(directory_name).split('-')28      name    = directory_name_parts[0..-2].join('-')29      version = directory_name_parts.last30      result = self.new(name, :version => version)31      spec_filename = File.join(directory_name, '.specification')32      if load_spec33        raise "Missing specification file in #{File.dirname(spec_filename)}. Perhaps you need to do a 'rake gems:refresh_specs'?" unless File.exists?(spec_filename)34        spec = YAML::load_file(spec_filename)35        result.specification = spec36      end37      result38    rescue ArgumentError => e39      raise "Unable to determine gem name and version from '#{directory_name}'"40    end41    def initialize(name, options = {})42      require 'rubygems' unless Object.const_defined?(:Gem)43      if options[:requirement]44        req = options[:requirement]45      elsif options[:version]46        req = Gem::Requirement.create(options[:version])47      else48        req = Gem::Requirement.default49      end50      @lib      = options[:lib]51      @source   = options[:source]52      @loaded   = @frozen = @load_paths_added = false53      super(name, req)54    end55    def add_load_paths56      self.class.add_frozen_gem_path57      return if @loaded || @load_paths_added58      if framework_gem?59        @load_paths_added = @loaded = @frozen = true60        return61      end62      gem self63      @spec = Gem.loaded_specs[name]64      @frozen = @spec.loaded_from.include?(self.class.unpacked_path) if @spec65      @load_paths_added = true66    rescue Gem::LoadError67    end68    def dependencies69      return [] if framework_gem?70      return [] unless installed?71      specification.dependencies.reject do |dependency|72        dependency.type == :development73      end.map do |dependency|74        GemDependency.new(dependency.name, :requirement => dependency.version_requirements)75      end76    end77    def specification78      # code repeated from Gem.activate. Find a matching spec, or the currently loaded version.79      # error out if loaded version and requested version are incompatible.80      @spec ||= begin81        matches = Gem.source_index.search(self)82        matches << @@framework_gems[name] if framework_gem?83        if Gem.loaded_specs[name] then84          # This gem is already loaded.  If the currently loaded gem is not in the85          # list of candidate gems, then we have a version conflict.86          existing_spec = Gem.loaded_specs[name]87          unless matches.any? { |spec| spec.version == existing_spec.version } then88            raise Gem::Exception,89                  "can't activate #{@dep}, already activated #{existing_spec.full_name}"90          end91          # we're stuck with it, so change to match92          version_requirements = Gem::Requirement.create("=#{existing_spec.version}")93          existing_spec94        else95          # new load96          matches.last97        end98      end99    end100    def specification=(s)101      @spec = s102    end103    def requirement104      r = version_requirements105      (r == Gem::Requirement.default) ? nil : r106    end107    def built?108      return false unless frozen?109      if vendor_gem?110        specification.extensions.each do |ext|111          makefile = File.join(unpacked_gem_directory, File.dirname(ext), 'Makefile')112          return false unless File.exists?(makefile)113        end114      end115      true116    end117    def framework_gem?118      @@framework_gems.has_key?(name)119    end120    def frozen?121      @frozen ||= vendor_rails? || vendor_gem?122    end123    def installed?124      Gem.loaded_specs.keys.include?(name)125    end126    def load_paths_added?127      # always try to add load paths - even if a gem is loaded, it may not128      # be a compatible version (ie random_gem 0.4 is loaded and a later spec129      # needs >= 0.5 - gem 'random_gem' will catch this and error out)130      @load_paths_added131    end132    def loaded?133      @loaded ||= begin134        if vendor_rails?135          true136        elsif specification.nil?137          false138        else139          # check if the gem is loaded by inspecting $"140          # specification.files lists all the files contained in the gem141          gem_files = specification.files142          # select only the files contained in require_paths - typically in bin and lib143          require_paths_regexp = Regexp.new("^(#{specification.require_paths*'|'})/")144          gem_lib_files = gem_files.select { |f| require_paths_regexp.match(f) }145          # chop the leading directory off - a typical file might be in146          # lib/gem_name/file_name.rb, but it will be 'require'd as gem_name/file_name.rb147          gem_lib_files.map! { |f| f.split('/', 2)[1] }148          # if any of the files from the above list appear in $", the gem is assumed to149          # have been loaded150          !(gem_lib_files & $").empty?151        end152      end153    end154    def vendor_rails?155      Gem.loaded_specs.has_key?(name) && Gem.loaded_specs[name].loaded_from.empty?156    end157    def vendor_gem?158      specification && File.exists?(unpacked_gem_directory)159    end160    def build(options={})161      require 'rails/gem_builder'162      return if specification.nil?163      if options[:force] || !built?164        return unless File.exists?(unpacked_specification_filename)165        spec = YAML::load_file(unpacked_specification_filename)166        Rails::GemBuilder.new(spec, unpacked_gem_directory).build_extensions167        puts "Built gem: '#{unpacked_gem_directory}'"168      end169      dependencies.each { |dep| dep.build(options) }170    end171    def install172      unless installed?173        cmd = "#{gem_command} #{install_command.join(' ')}"174        puts cmd175        puts %x(#{cmd})176      end177    end178    def load179      return if @loaded || @load_paths_added == false180      require(@lib || name) unless @lib == false181      @loaded = true182    rescue LoadError183      puts $!.to_s184      $!.backtrace.each { |b| puts b }185    end186    def refresh187      Rails::VendorGemSourceIndex.silence_spec_warnings = true188      real_gems = Gem.source_index.installed_source_index189      exact_dep = Gem::Dependency.new(name, "= #{specification.version}")190      matches = real_gems.search(exact_dep)191      installed_spec = matches.first192      if frozen?193        if installed_spec194          # we have a real copy195          # get a fresh spec - matches should only have one element196          # note that there is no reliable method to check that the loaded197          # spec is the same as the copy from real_gems - Gem.activate changes198          # some of the fields199          real_spec = Gem::Specification.load(matches.first.loaded_from)200          write_specification(real_spec)201          puts "Reloaded specification for #{name} from installed gems."202        else203          # the gem isn't installed locally - write out our current specs204          write_specification(specification)205          puts "Gem #{name} not loaded locally - writing out current spec."206        end207      else208        if framework_gem?209          puts "Gem directory for #{name} not found - check if it's loading before rails."210        else211          puts "Something bad is going on - gem directory not found for #{name}."212        end213      end214    end215    def unpack(options={})216      unless frozen? || framework_gem?217        FileUtils.mkdir_p unpack_base218        Dir.chdir unpack_base do219          Gem::GemRunner.new.run(unpack_command)220        end221        # Gem.activate changes the spec - get the original222        real_spec = Gem::Specification.load(specification.loaded_from)223        write_specification(real_spec)224      end225      dependencies.each { |dep| dep.unpack(options) } if options[:recursive]226    end227    def write_specification(spec)228      # copy the gem's specification into GEMDIR/.specification so that229      # we can access information about the gem on deployment systems230      # without having the gem installed231      File.open(unpacked_specification_filename, 'w') do |file|232        file.puts spec.to_yaml233      end234    end235    def ==(other)236      self.name == other.name && self.requirement == other.requirement237    end238    alias_method :"eql?", :"=="239    private240      def gem_command241        case RUBY_PLATFORM242          when /win32/243            'gem.bat'244          when /java/245            'jruby -S gem'246          else247            'gem'248        end249      end250      def install_command251        cmd = %w(install) << name252        cmd << "--version" << %("#{requirement.to_s}") if requirement253        cmd << "--source"  << @source  if @source254        cmd255      end256      def unpack_command257        cmd = %w(unpack) << name258        cmd << "--version" << "= "+specification.version.to_s if requirement259        cmd260      end261      def unpack_base262        Rails::GemDependency.unpacked_path263      end264      def unpacked_gem_directory265        File.join(unpack_base, specification.full_name)266      end267      def unpacked_specification_filename268        File.join(unpacked_gem_directory, '.specification')269      end270  end271end...

specification

Using AI Code Generation

1pp Gem::Specification.find_by_name("rake")2pp Gem::Specification.find_all_by_name("rake")3pp Gem::Specification.load("rake.gemspec")4pp Gem::Specification.latest_specs(true)5pp Gem::Specification.map(&:name)

specification

Using AI Code Generation

1puts Gem::Specification.find_by_name("rails").version2puts Gem::Version.new(Gem::Specification.find_by_name("rails").version.to_s)3puts Gem::Specification.find_by_name("rails").version.to_s4puts Gem::Specification.find_by_name("rails").version.version5Your name to display (optional):

specification

Using AI Code Generation

1Bundler.require(:default)2Bundler.require(:development)3Bundler.require(:test)4Bundler.require(:production)5Bundler.require(:development, :test)6Bundler.require(:development, :test, :production)7Bundler.require(:development, :test, :production, :custom)8Bundler.require(:development, :test, :production, :custom, :another)9Bundler.require(:development, :test, :production, :custom, :another, :last)10Bundler.require(:development, :test, :production, :custom, :another, :last, :group)11Bundler.require(:development, :test, :production, :custom, :another, :last, :group, :groups)

specification

Using AI Code Generation

1spec = Gem::Specification.find_by_name('rake', '0.8.3')2spec = Gem::Specification.find_by_name('rake')3spec = Gem::Specification.find_by_name('rake')4spec = Gem::Specification.find_by_name('rake', '0.8.3')5spec = Gem::Specification.find_by_name('rake', '0.8.3')6spec = Gem::Specification.find_by_name('rake')7spec = Gem::Specification.find_by_name('rake')8spec = Gem::Specification.find_by_name('r

specification

Using AI Code Generation

1Gem.load_path('rspec')2Gem.load_path('rspec')3Gem.load_path('rspec')

specification

Using AI Code Generation

1spec = Gem::Specification.find_by_name('rake', '0.8.3')2spec = Gem::Specification.find_by_name('rake')3spec = Gem::Specification.find_by_name('rake')4spec = Gem::Specification.find_by_name('rake', '0.8.3')5spec = Gem::Specification.find_by_name('rake', '0.8.3')6spec = Gem::Specification.find_by_name('rake')7spec = Gem::Specification.find_by_name('rake')8spec = Gem::Specification.find_by_name('r

specification

Using AI Code Generation

1Gem.load_path('rspec')2Gem.load_path('rspec')3Gem.load_path('rspec')

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