module Gem
class << self
##
# Returns full path of previous but one directory of dir in path
# E.g. for '/usr/share/ruby', 'ruby', it returns '/usr'
def previous_but_one_dir_to(path, dir)
return unless path
split_path = path.split(File::SEPARATOR)
File.join(split_path.take_while { |one_dir| one_dir !~ /^#{dir}$/ }[0..-2])
end
private :previous_but_one_dir_to
##
# Detects --install-dir option specified on command line.
def opt_install_dir?
@opt_install_dir ||= ARGV.include?('--install-dir') || ARGV.include?('-i')
end
private :opt_install_dir?
##
# Detects --build-root option specified on command line.
def opt_build_root?
@opt_build_root ||= ARGV.include?('--build-root')
end
private :opt_build_root?
##
# Tries to detect, if arguments and environment variables suggest that
# 'gem install' is executed from rpmbuild.
def rpmbuild?
@rpmbuild ||= ENV['RPM_PACKAGE_NAME'] && (opt_install_dir? || opt_build_root?)
end
private :rpmbuild?
##
# Default gems locations allowed on FHS system (/usr, /usr/share).
# The locations are derived from directories specified during build
# configuration.
def default_locations
@default_locations ||= {
:system => previous_but_one_dir_to(RbConfig::CONFIG['vendordir'], RbConfig::CONFIG['RUBY_INSTALL_NAME']),
:local => previous_but_one_dir_to(RbConfig::CONFIG['sitedir'], RbConfig::CONFIG['RUBY_INSTALL_NAME'])
}
end
##
# For each location provides set of directories for binaries (:bin_dir)
# platform independent (:gem_dir) and dependent (:ext_dir) files.
def default_dirs
@libdir ||= case RUBY_PLATFORM
when 'java'
RbConfig::CONFIG['datadir']
else
RbConfig::CONFIG['libdir']
end
@default_dirs ||= default_locations.inject(Hash.new) do |hash, location|
destination, path = location
hash[destination] = if path
{
:bin_dir => File.join(path, RbConfig::CONFIG['bindir'].split(File::SEPARATOR).last),
:gem_dir => File.join(path, RbConfig::CONFIG['datadir'].split(File::SEPARATOR).last, 'gems'),
:ext_dir => File.join(path, @libdir.split(File::SEPARATOR).last, 'gems')
}
else
{
:bin_dir => '',
:gem_dir => '',
:ext_dir => ''
}
end
hash
end
end
##
# Remove methods we are going to override. This avoids "method redefined;"
# warnings otherwise issued by Ruby.
remove_method :operating_system_defaults if method_defined? :operating_system_defaults
remove_method :default_dir if method_defined? :default_dir
remove_method :default_path if method_defined? :default_path
remove_method :default_ext_dir_for if method_defined? :default_ext_dir_for
##
# Regular user installs into user directory, root manages /usr/local.
def operating_system_defaults
unless opt_build_root?
options = if Process.uid == 0
"--install-dir=#{Gem.default_dirs[:local][:gem_dir]} --bindir #{Gem.default_dirs[:local][:bin_dir]}"
end
{"gem" => options}
else
{}
end
end
##
# RubyGems default overrides.
def default_dir
Gem.default_dirs[:system][:gem_dir]
end
def default_path
path = default_dirs.collect {|location, paths| paths[:gem_dir]}
path.unshift Gem.user_dir if File.exist? Gem.user_home
path
end
def default_ext_dir_for base_dir
dir = if rpmbuild?
build_dir = base_dir.chomp Gem.default_dirs[:system][:gem_dir]
if build_dir != base_dir
File.join build_dir, Gem.default_dirs[:system][:ext_dir]
end
else
dirs = Gem.default_dirs.detect {|location, paths| paths[:gem_dir] == base_dir}
dirs && dirs.last[:ext_dir]
end
dir && File.join(dir, RbConfig::CONFIG['RUBY_INSTALL_NAME'])
end
# This method should be available since RubyGems 2.2 until RubyGems 3.0.
# https://github.com/rubygems/rubygems/issues/749
if method_defined? :install_extension_in_lib
remove_method :install_extension_in_lib
def install_extension_in_lib
false
end
end
end
end
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