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Edit File : dependency_command.rb \| Size : 5.13 KB
# frozen_string_literal: true require_relative "../command" require_relative "../local_remote_options" require_relative "../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: "REGEXP show dependencies for gems whose names start with REGEXP" end def defaults_str # :nodoc: "--local --version '#{Gem::Requirement.default}' --no-reverse-dependencies" end def description # :nodoc: <<-EOF The dependency commands lists which other gems a given gem depends on. For local gems only the reverse dependencies can be shown (which gems depend on the named gem). The dependency list can be displayed in a format suitable for piping for use with other commands. EOF end def usage # :nodoc: "#{program_name} REGEXP" end def fetch_remote_specs(name, requirement, prerelease) # :nodoc: fetcher = Gem::SpecFetcher.fetcher specs_type = prerelease ? :complete : :released ss = if name.nil? fetcher.detect(specs_type) { true } else fetcher.detect(specs_type) do \|name_tuple\| name === name_tuple.name && requirement.satisfied_by?(name_tuple.version) end end ss.map {\|tuple, source\| source.fetch_spec(tuple) } end def fetch_specs(name_pattern, requirement, prerelease) # :nodoc: specs = [] if local? specs.concat Gem::Specification.stubs.find_all {\|spec\| name_matches = name_pattern ? name_pattern =~ spec.name : true version_matches = requirement.satisfied_by?(spec.version) name_matches && version_matches }.map(&:to_spec) end specs.concat fetch_remote_specs name_pattern, requirement, prerelease if remote? ensure_specs specs specs.uniq.sort end def display_pipe(specs) # :nodoc: 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 end def display_readable(specs, reverse) # :nodoc: response = String.new specs.each do \|spec\| response << print_dependencies(spec) unless reverse[spec.full_name].empty? response << " Used by\n" reverse[spec.full_name].each do \|sp, dep\| response << " #{sp} (#{dep})\n" end end response << "\n" end say response end def execute ensure_local_only_reverse_dependencies pattern = name_pattern options[:args] requirement = Gem::Requirement.new options[:version] specs = fetch_specs pattern, requirement, options[:prerelease] reverse = reverse_dependencies specs if options[:pipe_format] display_pipe specs else display_readable specs, reverse end end def ensure_local_only_reverse_dependencies # :nodoc: if options[:reverse_dependencies] && remote? && !local? alert_error "Only reverse dependencies for local gems are supported." terminate_interaction 1 end end def ensure_specs(specs) # :nodoc: return unless specs.empty? patterns = options[:args].join "," say "No gems found matching #{patterns} (#{options[:version]})" if Gem.configuration.verbose terminate_interaction 1 end def print_dependencies(spec, level = 0) # :nodoc: response = String.new response << " " * level + "Gem #{spec.full_name}\n" unless spec.dependencies.empty? spec.dependencies.sort_by {\|dep\| dep.name }.each do \|dep\| response << " " * level + " #{dep}\n" end end response end def reverse_dependencies(specs) # :nodoc: reverse = Hash.new {\|h, k\| h[k] = [] } return reverse unless options[:reverse_dependencies] specs.each do \|spec\| reverse[spec.full_name] = find_reverse_dependencies spec end reverse end ## # Returns an Array of [specification, dep] that are satisfied by +spec+. def find_reverse_dependencies(spec) # :nodoc: 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 && dep.requirement.satisfied_by?(spec.version) result << [sp.full_name, dep] end end end result end private def name_pattern(args) return if args.empty? if args.length == 1 && args.first =~ /\A(.)(i)?\z/m flags = $2 ? Regexp::IGNORECASE : nil Regexp.new $1, flags else /\A#{Regexp.union(*args)}/ end end end Back

Edit File : dependency_command.rb | Size : 5.13 KB

# frozen_string_literal: true
require_relative "../command"
require_relative "../local_remote_options"
require_relative "../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:
    "REGEXP        show dependencies for gems whose names start with REGEXP"
  end

def defaults_str # :nodoc:
    "--local --version '#{Gem::Requirement.default}' --no-reverse-dependencies"
  end

def description # :nodoc:
    <<-EOF
The dependency commands lists which other gems a given gem depends on.  For
local gems only the reverse dependencies can be shown (which gems depend on
the named gem).

The dependency list can be displayed in a format suitable for piping for
use with other commands.
    EOF
  end

def usage # :nodoc:
    "#{program_name} REGEXP"
  end

def fetch_remote_specs(name, requirement, prerelease) # :nodoc:
    fetcher = Gem::SpecFetcher.fetcher

specs_type = prerelease ? :complete : :released

ss = if name.nil?
      fetcher.detect(specs_type) { true }
    else
      fetcher.detect(specs_type) do |name_tuple|
        name === name_tuple.name && requirement.satisfied_by?(name_tuple.version)
      end
    end

ss.map {|tuple, source| source.fetch_spec(tuple) }
  end

def fetch_specs(name_pattern, requirement, prerelease) # :nodoc:
    specs = []

if local?
      specs.concat Gem::Specification.stubs.find_all {|spec|
        name_matches = name_pattern ? name_pattern =~ spec.name : true
        version_matches = requirement.satisfied_by?(spec.version)

name_matches && version_matches
      }.map(&:to_spec)
    end

specs.concat fetch_remote_specs name_pattern, requirement, prerelease if remote?

ensure_specs specs

specs.uniq.sort
  end

def display_pipe(specs) # :nodoc:
    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
  end

def display_readable(specs, reverse) # :nodoc:
    response = String.new

specs.each do |spec|
      response << print_dependencies(spec)
      unless reverse[spec.full_name].empty?
        response << "  Used by\n"
        reverse[spec.full_name].each do |sp, dep|
          response << "    #{sp} (#{dep})\n"
        end
      end
      response << "\n"
    end

say response
  end

def execute
    ensure_local_only_reverse_dependencies

pattern = name_pattern options[:args]
    requirement = Gem::Requirement.new options[:version]

specs = fetch_specs pattern, requirement, options[:prerelease]

reverse = reverse_dependencies specs

if options[:pipe_format]
      display_pipe specs
    else
      display_readable specs, reverse
    end
  end

def ensure_local_only_reverse_dependencies # :nodoc:
    if options[:reverse_dependencies] && remote? && !local?
      alert_error "Only reverse dependencies for local gems are supported."
      terminate_interaction 1
    end
  end

def ensure_specs(specs) # :nodoc:
    return unless specs.empty?

patterns = options[:args].join ","
    say "No gems found matching #{patterns} (#{options[:version]})" if
      Gem.configuration.verbose

terminate_interaction 1
  end

def print_dependencies(spec, level = 0) # :nodoc:
    response = String.new
    response << "  " * level + "Gem #{spec.full_name}\n"
    unless spec.dependencies.empty?
      spec.dependencies.sort_by {|dep| dep.name }.each do |dep|
        response << "  " * level + "  #{dep}\n"
      end
    end
    response
  end

def reverse_dependencies(specs) # :nodoc:
    reverse = Hash.new {|h, k| h[k] = [] }

return reverse unless options[:reverse_dependencies]

specs.each do |spec|
      reverse[spec.full_name] = find_reverse_dependencies spec
    end

reverse
  end

##
  # Returns an Array of [specification, dep] that are satisfied by +spec+.

def find_reverse_dependencies(spec) # :nodoc:
    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 &&
           dep.requirement.satisfied_by?(spec.version)
          result << [sp.full_name, dep]
        end
      end
    end

result
  end

private

def name_pattern(args)
    return if args.empty?

if args.length == 1 && args.first =~ /\A(.*)(i)?\z/m
      flags = $2 ? Regexp::IGNORECASE : nil
      Regexp.new $1, flags
    else
      /\A#{Regexp.union(*args)}/
    end
  end
end

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