mirror of
https://github.com/ruby/ruby.git
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664 lines
16 KiB
Ruby
664 lines
16 KiB
Ruby
# frozen_string_literal: true
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#--
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# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
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# All rights reserved.
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# See LICENSE.txt for permissions.
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#++
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require 'optparse'
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require 'rubygems/requirement'
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require 'rubygems/user_interaction'
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##
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# Base class for all Gem commands. When creating a new gem command, define
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# #initialize, #execute, #arguments, #defaults_str, #description and #usage
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# (as appropriate). See the above mentioned methods for details.
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#
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# A very good example to look at is Gem::Commands::ContentsCommand
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class Gem::Command
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include Gem::UserInteraction
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OptionParser.accept Symbol do |value|
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value.to_sym
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end
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##
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# The name of the command.
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attr_reader :command
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##
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# The options for the command.
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attr_reader :options
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##
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# The default options for the command.
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attr_accessor :defaults
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##
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# The name of the command for command-line invocation.
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attr_accessor :program_name
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##
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# A short description of the command.
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attr_accessor :summary
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##
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# Arguments used when building gems
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def self.build_args
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@build_args ||= []
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end
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def self.build_args=(value)
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@build_args = value
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end
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def self.common_options
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@common_options ||= []
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end
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def self.add_common_option(*args, &handler)
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Gem::Command.common_options << [args, handler]
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end
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def self.extra_args
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@extra_args ||= []
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end
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def self.extra_args=(value)
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case value
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when Array
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@extra_args = value
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when String
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@extra_args = value.split
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end
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end
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##
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# Return an array of extra arguments for the command. The extra arguments
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# come from the gem configuration file read at program startup.
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def self.specific_extra_args(cmd)
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specific_extra_args_hash[cmd]
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end
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##
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# Add a list of extra arguments for the given command. +args+ may be an
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# array or a string to be split on white space.
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def self.add_specific_extra_args(cmd,args)
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args = args.split(/\s+/) if args.kind_of? String
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specific_extra_args_hash[cmd] = args
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end
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##
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# Accessor for the specific extra args hash (self initializing).
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def self.specific_extra_args_hash
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@specific_extra_args_hash ||= Hash.new do |h,k|
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h[k] = Array.new
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end
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end
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##
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# Initializes a generic gem command named +command+. +summary+ is a short
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# description displayed in `gem help commands`. +defaults+ are the default
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# options. Defaults should be mirrored in #defaults_str, unless there are
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# none.
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#
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# When defining a new command subclass, use add_option to add command-line
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# switches.
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#
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# Unhandled arguments (gem names, files, etc.) are left in
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# <tt>options[:args]</tt>.
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def initialize(command, summary=nil, defaults={})
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@command = command
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@summary = summary
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@program_name = "gem #{command}"
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@defaults = defaults
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@options = defaults.dup
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@option_groups = Hash.new { |h,k| h[k] = [] }
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@deprecated_options = { command => {} }
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@parser = nil
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@when_invoked = nil
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end
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##
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# True if +long+ begins with the characters from +short+.
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def begins?(long, short)
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return false if short.nil?
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long[0, short.length] == short
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end
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##
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# Override to provide command handling.
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#
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# #options will be filled in with your parsed options, unparsed options will
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# be left in <tt>options[:args]</tt>.
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#
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# See also: #get_all_gem_names, #get_one_gem_name,
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# #get_one_optional_argument
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def execute
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raise Gem::Exception, "generic command has no actions"
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end
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##
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# Display to the user that a gem couldn't be found and reasons why
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#--
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def show_lookup_failure(gem_name, version, errors, suppress_suggestions = false, required_by = nil)
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gem = "'#{gem_name}' (#{version})"
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msg = String.new "Could not find a valid gem #{gem}"
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if errors and !errors.empty?
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msg << ", here is why:\n"
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errors.each { |x| msg << " #{x.wordy}\n" }
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else
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if required_by and gem != required_by
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msg << " (required by #{required_by}) in any repository"
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else
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msg << " in any repository"
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end
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end
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alert_error msg
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unless suppress_suggestions
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suggestions = Gem::SpecFetcher.fetcher.suggest_gems_from_name gem_name
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unless suggestions.empty?
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alert_error "Possible alternatives: #{suggestions.join(", ")}"
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end
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end
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end
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##
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# Get all gem names from the command line.
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def get_all_gem_names
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args = options[:args]
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if args.nil? or args.empty?
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raise Gem::CommandLineError,
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"Please specify at least one gem name (e.g. gem build GEMNAME)"
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end
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args.select { |arg| arg !~ /^-/ }
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end
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##
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# Get all [gem, version] from the command line.
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#
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# An argument in the form gem:ver is pull apart into the gen name and version,
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# respectively.
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def get_all_gem_names_and_versions
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get_all_gem_names.map do |name|
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if /\A(.*):(#{Gem::Requirement::PATTERN_RAW})\z/ =~ name
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[$1, $2]
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else
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[name]
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end
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end
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end
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##
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# Get a single gem name from the command line. Fail if there is no gem name
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# or if there is more than one gem name given.
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def get_one_gem_name
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args = options[:args]
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if args.nil? or args.empty?
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raise Gem::CommandLineError,
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"Please specify a gem name on the command line (e.g. gem build GEMNAME)"
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end
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if args.size > 1
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raise Gem::CommandLineError,
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"Too many gem names (#{args.join(', ')}); please specify only one"
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end
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args.first
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end
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##
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# Get a single optional argument from the command line. If more than one
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# argument is given, return only the first. Return nil if none are given.
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def get_one_optional_argument
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args = options[:args] || []
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args.first
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end
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##
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# Override to provide details of the arguments a command takes. It should
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# return a left-justified string, one argument per line.
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#
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# For example:
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#
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# def usage
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# "#{program_name} FILE [FILE ...]"
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# end
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#
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# def arguments
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# "FILE name of file to find"
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# end
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def arguments
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""
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end
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##
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# Override to display the default values of the command options. (similar to
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# +arguments+, but displays the default values).
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#
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# For example:
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#
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# def defaults_str
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# --no-gems-first --no-all
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# end
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def defaults_str
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""
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end
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##
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# Override to display a longer description of what this command does.
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def description
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nil
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end
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##
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# Override to display the usage for an individual gem command.
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#
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# The text "[options]" is automatically appended to the usage text.
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def usage
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program_name
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end
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##
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# Display the help message for the command.
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def show_help
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parser.program_name = usage
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say parser
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end
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##
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# Invoke the command with the given list of arguments.
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def invoke(*args)
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invoke_with_build_args args, nil
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end
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##
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# Invoke the command with the given list of normal arguments
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# and additional build arguments.
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def invoke_with_build_args(args, build_args)
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handle_options args
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options[:build_args] = build_args
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if options[:silent]
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old_ui = self.ui
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self.ui = ui = Gem::SilentUI.new
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end
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if options[:help]
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show_help
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elsif @when_invoked
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@when_invoked.call options
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else
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execute
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end
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ensure
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if ui
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self.ui = old_ui
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ui.close
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end
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end
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##
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# Call the given block when invoked.
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#
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# Normal command invocations just executes the +execute+ method of the
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# command. Specifying an invocation block allows the test methods to
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# override the normal action of a command to determine that it has been
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# invoked correctly.
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def when_invoked(&block)
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@when_invoked = block
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end
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##
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# Add a command-line option and handler to the command.
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#
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# See OptionParser#make_switch for an explanation of +opts+.
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#
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# +handler+ will be called with two values, the value of the argument and
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# the options hash.
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#
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# If the first argument of add_option is a Symbol, it's used to group
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# options in output. See `gem help list` for an example.
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def add_option(*opts, &handler) # :yields: value, options
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group_name = Symbol === opts.first ? opts.shift : :options
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@option_groups[group_name] << [opts, handler]
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end
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##
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# Remove previously defined command-line argument +name+.
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def remove_option(name)
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@option_groups.each do |_, option_list|
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option_list.reject! { |args, _| args.any? { |x| x.is_a?(String) && x =~ /^#{name}/ } }
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end
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end
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##
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# Mark a command-line option as deprecated, and optionally specify a
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# deprecation horizon.
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#
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# Note that with the current implementation, every version of the option needs
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# to be explicitly deprecated, so to deprecate an option defined as
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#
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# add_option('-t', '--[no-]test', 'Set test mode') do |value, options|
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# # ... stuff ...
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# end
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#
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# you would need to explicitly add a call to `deprecate_option` for every
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# version of the option you want to deprecate, like
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#
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# deprecate_option('-t')
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# deprecate_option('--test')
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# deprecate_option('--no-test')
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def deprecate_option(name, version: nil, extra_msg: nil)
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@deprecated_options[command].merge!({ name => { "rg_version_to_expire" => version, "extra_msg" => extra_msg } })
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end
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def check_deprecated_options(options)
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options.each do |option|
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if option_is_deprecated?(option)
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deprecation = @deprecated_options[command][option]
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version_to_expire = deprecation["rg_version_to_expire"]
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deprecate_option_msg = if version_to_expire
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"The \"#{option}\" option has been deprecated and will be removed in Rubygems #{version_to_expire}."
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else
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"The \"#{option}\" option has been deprecated and will be removed in future versions of Rubygems."
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end
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extra_msg = deprecation["extra_msg"]
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deprecate_option_msg += " #{extra_msg}" if extra_msg
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alert_warning(deprecate_option_msg)
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end
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end
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end
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##
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# Merge a set of command options with the set of default options (without
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# modifying the default option hash).
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def merge_options(new_options)
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@options = @defaults.clone
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new_options.each { |k,v| @options[k] = v }
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end
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##
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# True if the command handles the given argument list.
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def handles?(args)
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begin
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parser.parse!(args.dup)
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return true
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rescue
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return false
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end
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end
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##
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# Handle the given list of arguments by parsing them and recording the
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# results.
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def handle_options(args)
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args = add_extra_args(args)
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check_deprecated_options(args)
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@options = Marshal.load Marshal.dump @defaults # deep copy
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parser.parse!(args)
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@options[:args] = args
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end
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##
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# Adds extra args from ~/.gemrc
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def add_extra_args(args)
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result = []
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s_extra = Gem::Command.specific_extra_args(@command)
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extra = Gem::Command.extra_args + s_extra
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until extra.empty? do
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ex = []
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ex << extra.shift
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ex << extra.shift if extra.first.to_s =~ /^[^-]/
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result << ex if handles?(ex)
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end
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result.flatten!
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result.concat(args)
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result
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end
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def deprecated?
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false
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end
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private
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def option_is_deprecated?(option)
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@deprecated_options[command].has_key?(option)
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end
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def add_parser_description # :nodoc:
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return unless description
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formatted = description.split("\n\n").map do |chunk|
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wrap chunk, 80 - 4
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end.join "\n"
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@parser.separator nil
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@parser.separator " Description:"
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formatted.split("\n").each do |line|
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@parser.separator " #{line.rstrip}"
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end
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end
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def add_parser_options # :nodoc:
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@parser.separator nil
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regular_options = @option_groups.delete :options
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configure_options "", regular_options
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@option_groups.sort_by { |n,_| n.to_s }.each do |group_name, option_list|
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@parser.separator nil
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configure_options group_name, option_list
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end
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end
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##
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# Adds a section with +title+ and +content+ to the parser help view. Used
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# for adding command arguments and default arguments.
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def add_parser_run_info(title, content)
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return if content.empty?
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@parser.separator nil
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@parser.separator " #{title}:"
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content.split(/\n/).each do |line|
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@parser.separator " #{line}"
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end
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end
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def add_parser_summary # :nodoc:
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return unless @summary
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@parser.separator nil
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@parser.separator " Summary:"
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wrap(@summary, 80 - 4).split("\n").each do |line|
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@parser.separator " #{line.strip}"
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end
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end
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##
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# Create on demand parser.
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def parser
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create_option_parser if @parser.nil?
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@parser
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end
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##
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# Creates an option parser and fills it in with the help info for the
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# command.
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def create_option_parser
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@parser = OptionParser.new
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add_parser_options
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@parser.separator nil
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configure_options "Common", Gem::Command.common_options
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add_parser_run_info "Arguments", arguments
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add_parser_summary
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add_parser_description
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add_parser_run_info "Defaults", defaults_str
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end
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def configure_options(header, option_list)
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return if option_list.nil? or option_list.empty?
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header = header.to_s.empty? ? '' : "#{header} "
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@parser.separator " #{header}Options:"
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option_list.each do |args, handler|
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@parser.on(*args) do |value|
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handler.call(value, @options)
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end
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end
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@parser.separator ''
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end
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##
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# Wraps +text+ to +width+
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def wrap(text, width) # :doc:
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text.gsub(/(.{1,#{width}})( +|$\n?)|(.{1,#{width}})/, "\\1\\3\n")
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end
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# ----------------------------------------------------------------
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# Add the options common to all commands.
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add_common_option('-h', '--help',
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'Get help on this command') do |value, options|
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options[:help] = true
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end
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|
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add_common_option('-V', '--[no-]verbose',
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'Set the verbose level of output') do |value, options|
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# Set us to "really verbose" so the progress meter works
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if Gem.configuration.verbose and value
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Gem.configuration.verbose = 1
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else
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Gem.configuration.verbose = value
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end
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end
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|
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add_common_option('-q', '--quiet', 'Silence command progress meter') do |value, options|
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Gem.configuration.verbose = false
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end
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|
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add_common_option("--silent",
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"Silence RubyGems output") do |value, options|
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options[:silent] = true
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end
|
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|
|
# Backtrace and config-file are added so they show up in the help
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|
# commands. Both options are actually handled before the other
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# options get parsed.
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|
|
add_common_option('--config-file FILE',
|
|
'Use this config file instead of default') do
|
|
end
|
|
|
|
add_common_option('--backtrace',
|
|
'Show stack backtrace on errors') do
|
|
end
|
|
|
|
add_common_option('--debug',
|
|
'Turn on Ruby debugging') do
|
|
end
|
|
|
|
add_common_option('--norc',
|
|
'Avoid loading any .gemrc file') do
|
|
end
|
|
|
|
# :stopdoc:
|
|
|
|
HELP = <<-HELP.freeze
|
|
RubyGems is a sophisticated package manager for Ruby. This is a
|
|
basic help message containing pointers to more information.
|
|
|
|
Usage:
|
|
gem -h/--help
|
|
gem -v/--version
|
|
gem command [arguments...] [options...]
|
|
|
|
Examples:
|
|
gem install rake
|
|
gem list --local
|
|
gem build package.gemspec
|
|
gem help install
|
|
|
|
Further help:
|
|
gem help commands list all 'gem' commands
|
|
gem help examples show some examples of usage
|
|
gem help gem_dependencies gem dependencies file guide
|
|
gem help platforms gem platforms guide
|
|
gem help <COMMAND> show help on COMMAND
|
|
(e.g. 'gem help install')
|
|
gem server present a web page at
|
|
http://localhost:8808/
|
|
with info about installed gems
|
|
Further information:
|
|
https://guides.rubygems.org
|
|
HELP
|
|
|
|
# :startdoc:
|
|
|
|
end
|
|
|
|
##
|
|
# \Commands will be placed in this namespace
|
|
|
|
module Gem::Commands
|
|
end
|