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##
#
# Gem::PathSupport facilitates the GEM_HOME and GEM_PATH environment settings
# to the rest of RubyGems.
#
class Gem::PathSupport
##
# The default system path for managing Gems.
attr_reader :home
##
# Array of paths to search for Gems.
attr_reader :path
##
# Directory with spec cache
attr_reader :spec_cache_dir # :nodoc:
##
#
# Constructor. Takes a single argument which is to be treated like a
# hashtable, or defaults to ENV, the system environment.
#
def initialize(env=ENV)
@env = env
# note 'env' vs 'ENV'...
@home = env["GEM_HOME"] || ENV["GEM_HOME"] || Gem.default_dir
if File::ALT_SEPARATOR then
@home = @home.gsub(File::ALT_SEPARATOR, File::SEPARATOR)
end
self.path = env["GEM_PATH"] || ENV["GEM_PATH"]
@spec_cache_dir =
env["GEM_SPEC_CACHE"] || ENV["GEM_SPEC_CACHE"] ||
Gem.default_spec_cache_dir
@spec_cache_dir = @spec_cache_dir.dup.untaint
end
private
##
# Set the Gem home directory (as reported by Gem.dir).
def home=(home)
@home = home.to_s
end
##
# Set the Gem search path (as reported by Gem.path).
def path=(gpaths)
# FIX: it should be [home, *path], not [*path, home]
gem_path = []
# FIX: I can't tell wtf this is doing.
gpaths ||= (ENV['GEM_PATH'] || "").empty? ? nil : ENV["GEM_PATH"]
if gpaths
if gpaths.kind_of?(Array)
gem_path = gpaths.dup
else
gem_path = gpaths.split(Gem.path_separator)
end
if File::ALT_SEPARATOR then
gem_path.map! do |this_path|
this_path.gsub File::ALT_SEPARATOR, File::SEPARATOR
end
end
gem_path << @home
else
gem_path = Gem.default_path + [@home]
if defined?(APPLE_GEM_HOME)
gem_path << APPLE_GEM_HOME
end
end
@path = gem_path.uniq
end
end