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module Gem
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class << self
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##
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# Returns full path of previous but one directory of dir in path
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# E.g. for '/usr/share/ruby', 'ruby', it returns '/usr'
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def previous_but_one_dir_to(path, dir)
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split_path = path.split(File::SEPARATOR)
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File.join(split_path.take_while { |one_dir| one_dir !~ /^#{dir}$/ }[0..-2])
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end
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private :previous_but_one_dir_to
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##
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# Default gems locations allowed on FHS system (/usr, /usr/share).
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# The locations are derived from directories specified during build
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# configuration.
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def default_locations
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@default_locations ||= {
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:system => previous_but_one_dir_to(ConfigMap[:vendordir], ConfigMap[:RUBY_INSTALL_NAME]),
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:local => previous_but_one_dir_to(ConfigMap[:sitedir], ConfigMap[:RUBY_INSTALL_NAME])
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}
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end
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##
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# For each location provides set of directories for binaries (:bin_dir)
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# platform independent (:gem_dir) and dependent (:ext_dir) files.
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def default_dirs
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@libdir ||= case RUBY_PLATFORM
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when 'java'
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ConfigMap[:datadir]
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else
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ConfigMap[:libdir]
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end
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@default_dirs ||= Hash[default_locations.collect do |destination, path|
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[destination, {
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:bin_dir => File.join(path, ConfigMap[:bindir].split(File::SEPARATOR).last),
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:gem_dir => File.join(path, ConfigMap[:datadir].split(File::SEPARATOR).last, 'gems'),
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:ext_dir => File.join(path, @libdir.split(File::SEPARATOR).last, 'gems')
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}]
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end]
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end
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##
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# Remove methods we are going to override. This avoids "method redefined;"
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# warnings otherwise issued by Ruby.
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remove_method :default_dir if method_defined? :default_dir
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remove_method :default_path if method_defined? :default_path
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remove_method :default_bindir if method_defined? :default_bindir
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remove_method :default_ext_dir_for if method_defined? :default_ext_dir_for
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##
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# RubyGems default overrides.
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def default_dir
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if Process.uid == 0
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Gem.default_dirs[:local][:gem_dir]
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else
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Gem.user_dir
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end
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end
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def default_path
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path = default_dirs.collect {|location, paths| paths[:gem_dir]}
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path.unshift Gem.user_dir if File.exist? Gem.user_home
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end
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def default_bindir
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if Process.uid == 0
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Gem.default_dirs[:local][:bin_dir]
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else
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File.join [Dir.home, 'bin']
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end
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end
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def default_ext_dir_for base_dir
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dirs = Gem.default_dirs.detect {|location, paths| paths[:gem_dir] == base_dir}
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dirs && File.join(dirs.last[:ext_dir], RbConfig::CONFIG['RUBY_INSTALL_NAME'])
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end
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end
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end
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