# frozen_string_literal: true
##
#
# 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)
@home = env["GEM_HOME"] || Gem.default_dir
if File::ALT_SEPARATOR then
@home = @home.gsub(File::ALT_SEPARATOR, File::SEPARATOR)
end
@path = split_gem_path env["GEM_PATH"], @home
@spec_cache_dir = env["GEM_SPEC_CACHE"] || Gem.default_spec_cache_dir
@spec_cache_dir = @spec_cache_dir.dup.untaint
end
private
##
# Split the Gem search path (as reported by Gem.path).
def split_gem_path gpaths, home
# FIX: it should be [home, *path], not [*path, home]
gem_path = []
if gpaths
gem_path = gpaths.split(Gem.path_separator)
# Handle the path_separator being set to a regexp, which will cause
# end_with? to error
if gpaths =~ /#{Gem.path_separator}\z/
gem_path += default_path
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 = default_path
end
gem_path.uniq
end
# Return the default Gem path
def default_path
gem_path = Gem.default_path + [@home]
if defined?(APPLE_GEM_HOME)
gem_path << APPLE_GEM_HOME
end
gem_path
end
end
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