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Class: Gem::Commands::EnvironmentCommand

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
Instance Chain:
Inherits: Gem::Command
Defined in: lib/rubygems/commands/environment_command.rb

Constant Summary

::Gem::Command - Inherited

HELP

Class Attribute Summary

::Gem::Command - Inherited

.build_args

Arguments used when building gems.

.build_args=, .extra_args, .extra_args=

Class Method Summary

::Gem::Command - Inherited

.add_common_option,
.add_specific_extra_args

Add a list of extra arguments for the given command.

.common_options,
.new

Initializes a generic gem command named command.

.specific_extra_args

Return an array of extra arguments for the command.

.specific_extra_args_hash

Accessor for the specific extra args hash (self initializing).

Instance Attribute Summary

::Gem::Command - Inherited

#command

The name of the command.

#defaults

The default options for the command.

#deprecated?,
#options

The options for the command.

#program_name

The name of the command for command-line invocation.

#summary

A short description of the command.

::Gem::DefaultUserInteraction - Included

Instance Method Summary

::Gem::Command - Inherited

#add_extra_args

Adds extra args from ~/.gemrc.

#add_option

Add a command-line option and handler to the command.

#arguments

Override to provide details of the arguments a command takes.

#begins?

True if long begins with the characters from short.

#check_deprecated_options,
#defaults_str

Override to display the default values of the command options.

#deprecate_option

Mark a command-line option as deprecated, and optionally specify a deprecation horizon.

#description

Override to display a longer description of what this command does.

#execute

Override to provide command handling.

#get_all_gem_names

Get all gem names from the command line.

#get_all_gem_names_and_versions

Get all [gem, version] from the command line.

#get_one_gem_name

Get a single gem name from the command line.

#get_one_optional_argument

Get a single optional argument from the command line.

#handle_options

Handle the given list of arguments by parsing them and recording the results.

#handles?

True if the command handles the given argument list.

#invoke

Invoke the command with the given list of arguments.

#invoke_with_build_args

Invoke the command with the given list of normal arguments and additional build arguments.

#merge_options

Merge a set of command options with the set of default options (without modifying the default option hash).

#remove_option

Remove previously defined command-line argument name.

#show_help

Display the help message for the command.

#show_lookup_failure

Display to the user that a gem couldn’t be found and reasons why –.

#usage

Override to display the usage for an individual gem command.

#when_invoked

Call the given block when invoked.

#add_parser_run_info

Adds a section with title and content to the parser help view.

#configure_options,
#create_option_parser

Creates an option parser and fills it in with the help info for the command.

#option_is_deprecated?,
#parser

Create on demand parser.

#wrap

Wraps text to width

#extract_gem_name_and_version, #add_parser_description, #add_parser_options, #add_parser_summary

::Gem::UserInteraction - Included

#alert

Displays an alert statement.

#alert_error

Displays an error statement to the error output location.

#alert_warning

Displays a warning statement to the warning output location.

#ask

Asks a question and returns the answer.

#ask_for_password

Asks for a password with a prompt

#ask_yes_no

Asks a yes or no question.

#choose_from_list

Asks the user to answer question with an answer from the given list.

#say

Displays the given statement on the standard output (or equivalent).

#terminate_interaction

Terminates the RubyGems process with the given exit_code

#verbose

Calls say with msg or the results of the block if really_verbose is true.

::Gem::DefaultUserInteraction - Included

::Gem::Text - Included

#clean_text

Remove any non-printable characters and make the text suitable for printing.

#format_text

Wraps text to wrap characters and optionally indents by indent characters.

#levenshtein_distance

Returns a value representing the “cost” of transforming str1 into str2 Vendored version of DidYouMean::Levenshtein.distance from the ruby/did_you_mean gem @ 1.4.0 github.com/ruby/did_you_mean/blob/2ddf39b874808685965dbc47d344cf6c7651807c/lib/did_you_mean/levenshtein.rb#L7-L37.

#truncate_text, #min3

Constructor Details

.newEnvironmentCommand

[ GitHub ]

  
# File 'lib/rubygems/commands/environment_command.rb', line 6

def initialize
  super "environment", "Display information about the RubyGems environment"
end

Instance Method Details

#add_path(out, path)

[ GitHub ]

  
# File 'lib/rubygems/commands/environment_command.rb', line 100

def add_path(out, path)
  path.each do |component|
    out << "     - #{component}\n"
  end
end

#arguments

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rubygems/commands/environment_command.rb', line 10

def arguments # :nodoc:
  args = <<-EOF
        home            display the path where gems are installed. Aliases: gemhome, gemdir, GEM_HOME
        path            display path used to search for gems. Aliases: gempath, GEM_PATH
        user_gemhome    display the path where gems are installed when `--user-install` is given. Aliases: user_gemdir
        version         display the gem format version
        remotesources   display the remote gem servers
        platform        display the supported gem platforms
        <omitted>       display everything
  EOF
  return args.gsub(/^\s+/, "")
end

#description

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rubygems/commands/environment_command.rb', line 23

def description # :nodoc:
  <<-EOF
The environment command lets you query rubygems for its configuration for
use in shell scripts or as a debugging aid.

The RubyGems environment can be controlled through command line arguments,
gemrc files, environment variables and built-in defaults.

Command line argument defaults and some RubyGems defaults can be set in a
~/.gemrc file for individual users and a gemrc in the SYSTEM CONFIGURATION
DIRECTORY for all users. These files are YAML files with the following YAML
keys:

:sources: A YAML array of remote gem repositories to install gems from
:verbose: Verbosity of the gem command. false, true, and :really are the
          levels
:update_sources: Enable/disable automatic updating of repository metadata
:backtrace: Print backtrace when RubyGems encounters an error
:gempath: The paths in which to look for gems
:disable_default_gem_server: Force specification of gem server host on push
<gem_command>: A string containing arguments for the specified gem command

Example:

:verbose: false
install: --no-wrappers
update: --no-wrappers
:disable_default_gem_server: true

RubyGems' default local repository can be overridden with the GEM_PATH and
GEM_HOME environment variables. GEM_HOME sets the default repository to
install into. GEM_PATH allows multiple local repositories to be searched for
gems.

If you are behind a proxy server, RubyGems uses the HTTP_PROXY,
HTTP_PROXY_USER and HTTP_PROXY_PASS environment variables to discover the
proxy server.

If you would like to push gems to a private gem server the RUBYGEMS_HOST
environment variable can be set to the URI for that server.

If you are packaging RubyGems all of RubyGems' defaults are in
lib/rubygems/defaults.rb.  You may override these in
lib/rubygems/defaults/operating_system.rb
  EOF
end

#execute

[ GitHub ]

  
# File 'lib/rubygems/commands/environment_command.rb', line 74

def execute
  out = String.new
  arg = options[:args][0]
  out <<
    case arg
    when /^version/ then
      Gem::VERSION
    when /^gemdir/, /^gemhome/, /^home/, /^GEM_HOME/ then
      Gem.dir
    when /^gempath/, /^path/, /^GEM_PATH/ then
      Gem.path.join(File::PATH_SEPARATOR)
    when /^user_gemdir/, /^user_gemhome/ then
      Gem.user_dir
    when /^remotesources/ then
      Gem.sources.to_a.join("\n")
    when /^platform/ then
      Gem.platforms.join(File::PATH_SEPARATOR)
    when nil then
      show_environment
    else
      raise Gem::CommandLineError, "Unknown environment option [#{arg}]"
    end
  say out
  true
end

#git_path (private)

Git binary path

[ GitHub ]

  
# File 'lib/rubygems/commands/environment_command.rb', line 167

def git_path
  exts = ENV["PATHEXT"] ? ENV["PATHEXT"].split(";") : [""]
  ENV["PATH"].split(File::PATH_SEPARATOR).each do |path|
    exts.each do |ext|
      exe = File.join(path, "git#{ext}")
      return exe if File.executable?(exe) && !File.directory?(exe)
    end
  end

  return nil
end

#show_environment

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rubygems/commands/environment_command.rb', line 106

def show_environment # :nodoc:
  out = "RubyGems Environment:\n".dup

  out << "  - RUBYGEMS VERSION: #{Gem::VERSION}\n"

  out << "  - RUBY VERSION: #{RUBY_VERSION} (#{RUBY_RELEASE_DATE}"
  out << " patchlevel #{RUBY_PATCHLEVEL}" if defined? RUBY_PATCHLEVEL
  out << ") [#{RUBY_PLATFORM}]\n"

  out << "  - INSTALLATION DIRECTORY: #{Gem.dir}\n"

  out << "  - USER INSTALLATION DIRECTORY: #{Gem.user_dir}\n"

  out << "  - RUBYGEMS PREFIX: #{Gem.prefix}\n" unless Gem.prefix.nil?

  out << "  - RUBY EXECUTABLE: #{Gem.ruby}\n"

  out << "  - GIT EXECUTABLE: #{git_path}\n"

  out << "  - EXECUTABLE DIRECTORY: #{Gem.bindir}\n"

  out << "  - SPEC CACHE DIRECTORY: #{Gem.spec_cache_dir}\n"

  out << "  - SYSTEM CONFIGURATION DIRECTORY: #{Gem::ConfigFile::SYSTEM_CONFIG_PATH}\n"

  out << "  - RUBYGEMS PLATFORMS:\n"
  Gem.platforms.each do |platform|
    out << "     - #{platform}\n"
  end

  out << "  - GEM PATHS:\n"
  out << "     - #{Gem.dir}\n"

  gem_path = Gem.path.dup
  gem_path.delete Gem.dir
  add_path out, gem_path

  out << "  - GEM CONFIGURATION:\n"
  Gem.configuration.each do |name, value|
    value = value.gsub(/./, "*") if name == "gemcutter_key"
    out << "     - #{name.inspect} => #{value.inspect}\n"
  end

  out << "  - REMOTE SOURCES:\n"
  Gem.sources.each do |s|
    out << "     - #{s}\n"
  end

  out << "  - SHELL PATH:\n"

  shell_path = ENV["PATH"].split(File::PATH_SEPARATOR)
  add_path out, shell_path

  out
end

#usage

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rubygems/commands/environment_command.rb', line 70

def usage # :nodoc:
  "#{program_name} [arg]"
end