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Edit File : specification_command.rb \| Size : 3.42 KB
# frozen_string_literal: true require_relative '../command' require_relative '../local_remote_options' require_relative '../version_option' require_relative '../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 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? if File.exist? gem specs << Gem::Package.new(gem).spec rescue nil end if specs.empty? specs.push(dep.matching_specs) end end if remote? dep.prerelease = options[:prerelease] found, _ = Gem::SpecFetcher.fetcher.spec_for_dependency dep specs.push(found.map {\|spec,\| spec }) end if specs.empty? alert_error "No gem matching '#{dep}' found" terminate_interaction 1 end platform = get_platform_from_requirements(options) if platform specs = specs.select{\|s\| s.platform.to_s == platform } end unless options[:all] 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 Back

Edit File : specification_command.rb | Size : 3.42 KB

# frozen_string_literal: true
require_relative '../command'
require_relative '../local_remote_options'
require_relative '../version_option'
require_relative '../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
      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?
      if File.exist? gem
        specs << Gem::Package.new(gem).spec rescue nil
      end

if specs.empty?
        specs.push(*dep.matching_specs)
      end
    end

if remote?
      dep.prerelease = options[:prerelease]
      found, _ = Gem::SpecFetcher.fetcher.spec_for_dependency dep

specs.push(*found.map {|spec,| spec })
    end

if specs.empty?
      alert_error "No gem matching '#{dep}' found"
      terminate_interaction 1
    end

platform = get_platform_from_requirements(options)

if platform
      specs = specs.select{|s| s.platform.to_s == platform }
    end

unless options[:all]
      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

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