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require 'rubygems/command'
class Gem::Commands::EnvironmentCommand < Gem::Command
def initialize
super 'environment', 'Display information about the RubyGems environment'
end
def arguments # :nodoc:
args = <<-EOF
packageversion display the package version
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
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
def usage # :nodoc:
"#{program_name} [arg]"
end
def execute
out = ''
arg = options[:args][0]
out <<
case arg
when /^packageversion/ then
Gem::RubyGemsPackageVersion
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
def add_path out, path
path.each do |component|
out << " - #{component}\n"
end
end
def show_environment # :nodoc:
out = "RubyGems Environment:\n"
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 << " - RUBYGEMS PREFIX: #{Gem.prefix}\n" unless Gem.prefix.nil?
out << " - RUBY EXECUTABLE: #{Gem.ruby}\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
end
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