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ðŸ“„ build_command.rb(2.93 KB)
ðŸ“„ cert_command.rb(9.13 KB)
ðŸ“„ check_command.rb(2.29 KB)
ðŸ“„ cleanup_command.rb(4.27 KB)
ðŸ“„ contents_command.rb(4.31 KB)
ðŸ“„ dependency_command.rb(5.08 KB)
ðŸ“„ environment_command.rb(5.22 KB)
ðŸ“„ exec_command.rb(6.61 KB)
ðŸ“„ fetch_command.rb(2.65 KB)
ðŸ“„ generate_index_command.rb(1.73 KB)
ðŸ“„ help_command.rb(10.16 KB)
ðŸ“„ info_command.rb(834 B)
ðŸ“„ install_command.rb(7.29 KB)
ðŸ“„ list_command.rb(997 B)
ðŸ“„ lock_command.rb(2.69 KB)
ðŸ“„ mirror_command.rb(627 B)
ðŸ“„ open_command.rb(1.9 KB)
ðŸ“„ outdated_command.rb(864 B)
ðŸ“„ owner_command.rb(3.36 KB)
ðŸ“„ pristine_command.rb(6.69 KB)
ðŸ“„ push_command.rb(3.22 KB)
ðŸ“„ query_command.rb(1.21 KB)
ðŸ“„ rdoc_command.rb(2.2 KB)
ðŸ“„ rebuild_command.rb(7.28 KB)
ðŸ“„ search_command.rb(962 B)
ðŸ“„ server_command.rb(649 B)
ðŸ“„ setup_command.rb(17.78 KB)
ðŸ“„ signin_command.rb(896 B)
ðŸ“„ signout_command.rb(898 B)
ðŸ“„ sources_command.rb(5.75 KB)
ðŸ“„ specification_command.rb(3.46 KB)
ðŸ“„ stale_command.rb(965 B)
ðŸ“„ uninstall_command.rb(5.86 KB)
ðŸ“„ unpack_command.rb(4.14 KB)
ðŸ“„ update_command.rb(8.3 KB)
ðŸ“„ which_command.rb(2.09 KB)
ðŸ“„ yank_command.rb(2.35 KB)

Editing: specification_command.rb

# 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? && 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 && options[:format] == :ruby

if local?
      if File.exist? gem
        begin
          specs << Gem::Package.new(gem).spec
        rescue StandardError
          nil
        end
      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(&: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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Editing: specification_command.rb

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