mirror of
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synced 2025-08-24 05:25:34 +02:00
f37e9f42b9
I couldn't find a cross-platform way to check "can I create this directory?"
So I removed that, and went back to the original simpler logic of
"if the directory is writable, use it."
3aa86a56db
106 lines
2.5 KiB
Ruby
106 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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##
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#
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# Gem::PathSupport facilitates the GEM_HOME and GEM_PATH environment settings
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# to the rest of RubyGems.
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#
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class Gem::PathSupport
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##
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# The default system path for managing Gems.
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attr_reader :home
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##
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# Array of paths to search for Gems.
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attr_reader :path
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##
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# Directory with spec cache
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attr_reader :spec_cache_dir # :nodoc:
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##
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# Whether `Gem.paths.home` defaulted to a user install or not.
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attr_reader :auto_user_install
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##
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#
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# Constructor. Takes a single argument which is to be treated like a
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# hashtable, or defaults to ENV, the system environment.
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#
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def initialize(env)
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# Current implementation of @home, which is exposed as `Gem.paths.home`:
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# 1. If `env["GEM_HOME"]` is defined in the environment: `env["GEM_HOME"]`.
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# 2. If `Gem.default_dir` is writable: `Gem.default_dir`.
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# 3. Otherwise: `Gem.user_dir`.
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if env.key?("GEM_HOME")
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@home = normalize_home_dir(env["GEM_HOME"])
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elsif File.writable?(Gem.default_dir)
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@home = normalize_home_dir(Gem.default_dir)
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else
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# If `GEM_HOME` is not set AND we can't use `Gem.default_dir`,
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# default to a user installation and set `@auto_user_install`.
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@auto_user_install = true
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@home = normalize_home_dir(Gem.user_dir)
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end
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@path = split_gem_path env["GEM_PATH"], @home
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@spec_cache_dir = env["GEM_SPEC_CACHE"] || Gem.default_spec_cache_dir
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@spec_cache_dir = @spec_cache_dir.dup.tap(&Gem::UNTAINT)
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end
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private
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def normalize_home_dir(home)
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if File::ALT_SEPARATOR
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home = home.gsub(File::ALT_SEPARATOR, File::SEPARATOR)
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end
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expand(home)
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end
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##
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# Split the Gem search path (as reported by Gem.path).
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def split_gem_path(gpaths, home)
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# FIX: it should be [home, *path], not [*path, home]
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gem_path = []
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if gpaths
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gem_path = gpaths.split(Gem.path_separator)
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# Handle the path_separator being set to a regexp, which will cause
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# end_with? to error
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if /#{Gem.path_separator}\z/.match?(gpaths)
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gem_path += default_path
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end
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if File::ALT_SEPARATOR
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gem_path.map! do |this_path|
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this_path.gsub File::ALT_SEPARATOR, File::SEPARATOR
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end
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end
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gem_path << home
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else
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gem_path = default_path
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end
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gem_path.map {|path| expand(path) }.uniq
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end
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# Return the default Gem path
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def default_path
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Gem.default_path + [@home]
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end
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def expand(path)
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if File.directory?(path)
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File.realpath(path)
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else
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path
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end
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end
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end
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