Class: Gem::Commands::EnvironmentCommand

# File 'lib/rubygems/commands/environment_command.rb', line 9

def arguments # :nodoc:
  args = <<-EOF
        gemdir          display the path where gems are installed
        gempath         display path used to search for gems
        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

# File 'lib/rubygems/commands/environment_command.rb', line 21

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

# File 'lib/rubygems/commands/environment_command.rb', line 72

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 /^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

# File 'lib/rubygems/commands/environment_command.rb', line 163

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

# File 'lib/rubygems/commands/environment_command.rb', line 102

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

# File 'lib/rubygems/commands/environment_command.rb', line 68

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