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Edit File : specification_command.rb \| Size : 3.46 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? && 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 Back

Edit File : specification_command.rb | Size : 3.46 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? && 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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