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Edit File : command_manager.rb \| Size : 5.59 KB
# frozen_string_literal: true #-- # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others. # All rights reserved. # See LICENSE.txt for permissions. #++ require_relative "command" require_relative "user_interaction" require_relative "text" ## # The command manager registers and installs all the individual sub-commands # supported by the gem command. # # Extra commands can be provided by writing a rubygems_plugin.rb # file in an installed gem. You should register your command against the # Gem::CommandManager instance, like this: # # # file rubygems_plugin.rb # require 'rubygems/command_manager' # # Gem::CommandManager.instance.register_command :edit # # You should put the implementation of your command in rubygems/commands. # # # file rubygems/commands/edit_command.rb # class Gem::Commands::EditCommand < Gem::Command # # ... # end # # See Gem::Command for instructions on writing gem commands. class Gem::CommandManager include Gem::Text include Gem::UserInteraction BUILTIN_COMMANDS = [ # :nodoc: :build, :cert, :check, :cleanup, :contents, :dependency, :environment, :exec, :fetch, :generate_index, :help, :info, :install, :list, :lock, :mirror, :open, :outdated, :owner, :pristine, :push, :query, :rdoc, :search, :server, :signin, :signout, :sources, :specification, :stale, :uninstall, :unpack, :update, :which, :yank, ].freeze ALIAS_COMMANDS = { "i" => "install", "login" => "signin", "logout" => "signout", }.freeze ## # Return the authoritative instance of the command manager. def self.instance @instance \|\|= new end ## # Returns self. Allows a CommandManager instance to stand # in for the class itself. def instance self end ## # Reset the authoritative instance of the command manager. def self.reset @instance = nil end ## # Register all the subcommands supported by the gem command. def initialize require "timeout" @commands = {} BUILTIN_COMMANDS.each do \|name\| register_command name end end ## # Register the Symbol +command+ as a gem command. def register_command(command, obj=false) @commands[command] = obj end ## # Unregister the Symbol +command+ as a gem command. def unregister_command(command) @commands.delete command end ## # Returns a Command instance for +command_name+ def [](command_name) command_name = command_name.intern return nil if @commands[command_name].nil? @commands[command_name] \|\|= load_and_instantiate(command_name) end ## # Return a sorted list of all command names as strings. def command_names @commands.keys.collect {\|key\| key.to_s }.sort end ## # Run the command specified by +args+. def run(args, build_args=nil) process_args(args, build_args) rescue StandardError, Timeout::Error => ex if ex.respond_to?(:detailed_message) msg = ex.detailed_message(highlight: false).sub(/\A(.*?)(?: \(.+?\))/) { $1 } else msg = ex.message end alert_error clean_text("While executing gem ... (#{ex.class})\n #{msg}") ui.backtrace ex terminate_interaction(1) rescue Interrupt alert_error clean_text("Interrupted") terminate_interaction(1) end def process_args(args, build_args=nil) if args.empty? say Gem::Command::HELP terminate_interaction 1 end case args.first when "-h", "--help" then say Gem::Command::HELP terminate_interaction 0 when "-v", "--version" then say Gem::VERSION terminate_interaction 0 when "-C" then args.shift start_point = args.shift if Dir.exist?(start_point) Dir.chdir(start_point) { invoke_command(args, build_args) } else alert_error clean_text("#{start_point} isn't a directory.") terminate_interaction 1 end when /^-/ then alert_error clean_text("Invalid option: #{args.first}. See 'gem --help'.") terminate_interaction 1 else invoke_command(args, build_args) end end def find_command(cmd_name) cmd_name = find_alias_command cmd_name possibilities = find_command_possibilities cmd_name if possibilities.size > 1 raise Gem::CommandLineError, "Ambiguous command #{cmd_name} matches [#{possibilities.join(', ')}]" elsif possibilities.empty? raise Gem::UnknownCommandError.new(cmd_name) end self[possibilities.first] end def find_alias_command(cmd_name) alias_name = ALIAS_COMMANDS[cmd_name] alias_name ? alias_name : cmd_name end def find_command_possibilities(cmd_name) len = cmd_name.length found = command_names.select {\|name\| cmd_name == name[0, len] } exact = found.find {\|name\| name == cmd_name } exact ? [exact] : found end private def load_and_instantiate(command_name) command_name = command_name.to_s const_name = command_name.capitalize.gsub(/_(.)/) { $1.upcase } << "Command" load_error = nil begin begin require "rubygems/commands/#{command_name}_command" rescue LoadError => e load_error = e end Gem::Commands.const_get(const_name).new rescue Exception => e e = load_error if load_error alert_error clean_text("Loading command: #{command_name} (#{e.class})\n\t#{e}") ui.backtrace e end end def invoke_command(args, build_args) cmd_name = args.shift.downcase cmd = find_command cmd_name cmd.deprecation_warning if cmd.deprecated? cmd.invoke_with_build_args args, build_args end end Back

Edit File : command_manager.rb | Size : 5.59 KB

# frozen_string_literal: true

#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
# See LICENSE.txt for permissions.
#++

require_relative "command"
require_relative "user_interaction"
require_relative "text"

##
# The command manager registers and installs all the individual sub-commands
# supported by the gem command.
#
# Extra commands can be provided by writing a rubygems_plugin.rb
# file in an installed gem.  You should register your command against the
# Gem::CommandManager instance, like this:
#
#   # file rubygems_plugin.rb
#   require 'rubygems/command_manager'
#
#   Gem::CommandManager.instance.register_command :edit
#
# You should put the implementation of your command in rubygems/commands.
#
#   # file rubygems/commands/edit_command.rb
#   class Gem::Commands::EditCommand < Gem::Command
#     # ...
#   end
#
# See Gem::Command for instructions on writing gem commands.

class Gem::CommandManager
  include Gem::Text
  include Gem::UserInteraction

BUILTIN_COMMANDS = [ # :nodoc:
    :build,
    :cert,
    :check,
    :cleanup,
    :contents,
    :dependency,
    :environment,
    :exec,
    :fetch,
    :generate_index,
    :help,
    :info,
    :install,
    :list,
    :lock,
    :mirror,
    :open,
    :outdated,
    :owner,
    :pristine,
    :push,
    :query,
    :rdoc,
    :search,
    :server,
    :signin,
    :signout,
    :sources,
    :specification,
    :stale,
    :uninstall,
    :unpack,
    :update,
    :which,
    :yank,
  ].freeze

ALIAS_COMMANDS = {
    "i" => "install",
    "login" => "signin",
    "logout" => "signout",
  }.freeze

##
  # Return the authoritative instance of the command manager.

def self.instance
    @instance ||= new
  end

##
  # Returns self. Allows a CommandManager instance to stand
  # in for the class itself.

def instance
    self
  end

##
  # Reset the authoritative instance of the command manager.

def self.reset
    @instance = nil
  end

##
  # Register all the subcommands supported by the gem command.

def initialize
    require "timeout"
    @commands = {}

BUILTIN_COMMANDS.each do |name|
      register_command name
    end
  end

##
  # Register the Symbol +command+ as a gem command.

def register_command(command, obj=false)
    @commands[command] = obj
  end

##
  # Unregister the Symbol +command+ as a gem command.

def unregister_command(command)
    @commands.delete command
  end

##
  # Returns a Command instance for +command_name+

def [](command_name)
    command_name = command_name.intern
    return nil if @commands[command_name].nil?
    @commands[command_name] ||= load_and_instantiate(command_name)
  end

##
  # Return a sorted list of all command names as strings.

def command_names
    @commands.keys.collect {|key| key.to_s }.sort
  end

##
  # Run the command specified by +args+.

def run(args, build_args=nil)
    process_args(args, build_args)
  rescue StandardError, Timeout::Error => ex
    if ex.respond_to?(:detailed_message)
      msg = ex.detailed_message(highlight: false).sub(/\A(.*?)(?: $.+?$)/) { $1 }
    else
      msg = ex.message
    end
    alert_error clean_text("While executing gem ... (#{ex.class})\n    #{msg}")
    ui.backtrace ex

terminate_interaction(1)
  rescue Interrupt
    alert_error clean_text("Interrupted")
    terminate_interaction(1)
  end

def process_args(args, build_args=nil)
    if args.empty?
      say Gem::Command::HELP
      terminate_interaction 1
    end

case args.first
    when "-h", "--help" then
      say Gem::Command::HELP
      terminate_interaction 0
    when "-v", "--version" then
      say Gem::VERSION
      terminate_interaction 0
    when "-C" then
      args.shift
      start_point = args.shift
      if Dir.exist?(start_point)
        Dir.chdir(start_point) { invoke_command(args, build_args) }
      else
        alert_error clean_text("#{start_point} isn't a directory.")
        terminate_interaction 1
      end
    when /^-/ then
      alert_error clean_text("Invalid option: #{args.first}. See 'gem --help'.")
      terminate_interaction 1
    else
      invoke_command(args, build_args)
    end
  end

def find_command(cmd_name)
    cmd_name = find_alias_command cmd_name

possibilities = find_command_possibilities cmd_name

if possibilities.size > 1
      raise Gem::CommandLineError,
            "Ambiguous command #{cmd_name} matches [#{possibilities.join(', ')}]"
    elsif possibilities.empty?
      raise Gem::UnknownCommandError.new(cmd_name)
    end

self[possibilities.first]
  end

def find_alias_command(cmd_name)
    alias_name = ALIAS_COMMANDS[cmd_name]
    alias_name ? alias_name : cmd_name
  end

def find_command_possibilities(cmd_name)
    len = cmd_name.length

found = command_names.select {|name| cmd_name == name[0, len] }

exact = found.find {|name| name == cmd_name }

exact ? [exact] : found
  end

private

def load_and_instantiate(command_name)
    command_name = command_name.to_s
    const_name = command_name.capitalize.gsub(/_(.)/) { $1.upcase } << "Command"
    load_error = nil

begin
      begin
        require "rubygems/commands/#{command_name}_command"
      rescue LoadError => e
        load_error = e
      end
      Gem::Commands.const_get(const_name).new
    rescue Exception => e
      e = load_error if load_error

alert_error clean_text("Loading command: #{command_name} (#{e.class})\n\t#{e}")
      ui.backtrace e
    end
  end

def invoke_command(args, build_args)
    cmd_name = args.shift.downcase
    cmd = find_command cmd_name
    cmd.deprecation_warning if cmd.deprecated?
    cmd.invoke_with_build_args args, build_args
  end
end

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