1 files changed, 301 insertions, 0 deletions
diff --git a/lib/bundler/shared_helpers.rb b/lib/bundler/shared_helpers.rb
new file mode 100644
index 0000000000..a9141a1346
--- /dev/null
+++ b/lib/bundler/shared_helpers.rb
@@ -0,0 +1,301 @@
+# frozen_string_literal: true
+require "pathname"
+require "rubygems"
+
+require "bundler/constants"
+require "bundler/rubygems_integration"
+require "bundler/current_ruby"
+
+module Gem
+  class Dependency
+    # This is only needed for RubyGems < 1.4
+    unless method_defined? :requirement
+      def requirement
+        version_requirements
+      end
+    end
+  end
+end
+
+module Bundler
+  module SharedHelpers
+    def default_gemfile
+      gemfile = find_gemfile
+      raise GemfileNotFound, "Could not locate Gemfile" unless gemfile
+      Pathname.new(gemfile).untaint
+    end
+
+    def default_lockfile
+      gemfile = default_gemfile
+
+      case gemfile.basename.to_s
+      when "gems.rb" then Pathname.new(gemfile.sub(/.rb$/, ".locked"))
+      else Pathname.new("#{gemfile}.lock")
+      end.untaint
+    end
+
+    def default_bundle_dir
+      bundle_dir = find_directory(".bundle")
+      return nil unless bundle_dir
+
+      bundle_dir = Pathname.new(bundle_dir)
+
+      global_bundle_dir = Bundler.user_home.join(".bundle")
+      return nil if bundle_dir == global_bundle_dir
+
+      bundle_dir
+    end
+
+    def in_bundle?
+      find_gemfile
+    end
+
+    def chdir(dir, &blk)
+      Bundler.rubygems.ext_lock.synchronize do
+        Dir.chdir dir, &blk
+      end
+    end
+
+    def pwd
+      Bundler.rubygems.ext_lock.synchronize do
+        Pathname.pwd
+      end
+    end
+
+    def with_clean_git_env(&block)
+      keys    = %w(GIT_DIR GIT_WORK_TREE)
+      old_env = keys.inject({}) do |h, k|
+        h.update(k => ENV[k])
+      end
+
+      keys.each {|key| ENV.delete(key) }
+
+      block.call
+    ensure
+      keys.each {|key| ENV[key] = old_env[key] }
+    end
+
+    def set_bundle_environment
+      set_bundle_variables
+      set_path
+      set_rubyopt
+      set_rubylib
+    end
+
+    # Rescues permissions errors raised by file system operations
+    # (ie. Errno:EACCESS, Errno::EAGAIN) and raises more friendly errors instead.
+    #
+    # @param path [String] the path that the action will be attempted to
+    # @param action [Symbol, #to_s] the type of operation that will be
+    #   performed. For example: :write, :read, :exec
+    #
+    # @yield path
+    #
+    # @raise [Bundler::PermissionError] if Errno:EACCES is raised in the
+    #   given block
+    # @raise [Bundler::TemporaryResourceError] if Errno:EAGAIN is raised in the
+    #   given block
+    #
+    # @example
+    #   filesystem_access("vendor/cache", :write) do
+    #     FileUtils.mkdir_p("vendor/cache")
+    #   end
+    #
+    # @see {Bundler::PermissionError}
+    def filesystem_access(path, action = :write, &block)
+      # Use block.call instead of yield because of a bug in Ruby 2.2.2
+      # See https://github.com/bundler/bundler/issues/5341 for details
+      block.call(path.dup.untaint)
+    rescue Errno::EACCES
+      raise PermissionError.new(path, action)
+    rescue Errno::EAGAIN
+      raise TemporaryResourceError.new(path, action)
+    rescue Errno::EPROTO
+      raise VirtualProtocolError.new
+    rescue Errno::ENOSPC
+      raise NoSpaceOnDeviceError.new(path, action)
+    rescue *[const_get_safely(:ENOTSUP, Errno)].compact
+      raise OperationNotSupportedError.new(path, action)
+    rescue Errno::EEXIST, Errno::ENOENT
+      raise
+    rescue SystemCallError => e
+      raise GenericSystemCallError.new(e, "There was an error accessing `#{path}`.")
+    end
+
+    def const_get_safely(constant_name, namespace)
+      const_in_namespace = namespace.constants.include?(constant_name.to_s) ||
+        namespace.constants.include?(constant_name.to_sym)
+      return nil unless const_in_namespace
+      namespace.const_get(constant_name)
+    end
+
+    def major_deprecation(message)
+      return unless prints_major_deprecations?
+      @major_deprecation_ui ||= Bundler::UI::Shell.new("no-color" => true)
+      ui = Bundler.ui.is_a?(@major_deprecation_ui.class) ? Bundler.ui : @major_deprecation_ui
+      ui.warn("[DEPRECATED FOR #{Bundler::VERSION.split(".").first.to_i + 1}.0] #{message}")
+    end
+
+    def print_major_deprecations!
+      deprecate_gemfile(find_gemfile) if find_gemfile == find_file("Gemfile")
+      if RUBY_VERSION < "2"
+        major_deprecation("Bundler will only support ruby >= 2.0, you are running #{RUBY_VERSION}")
+      end
+      return if Bundler.rubygems.provides?(">= 2")
+      major_deprecation("Bundler will only support rubygems >= 2.0, you are running #{Bundler.rubygems.version}")
+    end
+
+    def trap(signal, override = false, &block)
+      prior = Signal.trap(signal) do
+        block.call
+        prior.call unless override
+      end
+    end
+
+    def ensure_same_dependencies(spec, old_deps, new_deps)
+      new_deps = new_deps.reject {|d| d.type == :development }
+      old_deps = old_deps.reject {|d| d.type == :development }
+
+      without_type = proc {|d| Gem::Dependency.new(d.name, d.requirements_list.sort) }
+      new_deps.map!(&without_type)
+      old_deps.map!(&without_type)
+
+      extra_deps = new_deps - old_deps
+      return if extra_deps.empty?
+
+      Bundler.ui.debug "#{spec.full_name} from #{spec.remote} has either corrupted API or lockfile dependencies" \
+        " (was expecting #{old_deps.map(&:to_s)}, but the real spec has #{new_deps.map(&:to_s)})"
+      raise APIResponseMismatchError,
+        "Downloading #{spec.full_name} revealed dependencies not in the API or the lockfile (#{extra_deps.join(", ")})." \
+        "\nEither installing with `--full-index` or running `bundle update #{spec.name}` should fix the problem."
+    end
+
+  private
+
+    def validate_bundle_path
+      return unless Bundler.bundle_path.to_s.include?(File::PATH_SEPARATOR)
+      message = "Your bundle path contains a '#{File::PATH_SEPARATOR}', " \
+                "which is the path separator for your system. Bundler cannot " \
+                "function correctly when the Bundle path contains the " \
+                "system's PATH separator. Please change your " \
+                "bundle path to not include '#{File::PATH_SEPARATOR}'." \
+                "\nYour current bundle path is '#{Bundler.bundle_path}'."
+      raise Bundler::PathError, message
+    end
+
+    def find_gemfile
+      given = ENV["BUNDLE_GEMFILE"]
+      return given if given && !given.empty?
+      find_file("Gemfile", "gems.rb")
+    end
+
+    def find_file(*names)
+      search_up(*names) do |filename|
+        return filename if File.file?(filename)
+      end
+    end
+
+    def find_directory(*names)
+      search_up(*names) do |dirname|
+        return dirname if File.directory?(dirname)
+      end
+    end
+
+    def search_up(*names)
+      previous = nil
+      current  = File.expand_path(SharedHelpers.pwd).untaint
+
+      until !File.directory?(current) || current == previous
+        if ENV["BUNDLE_SPEC_RUN"]
+          # avoid stepping above the tmp directory when testing
+          if !!(ENV["BUNDLE_RUBY"] && ENV["BUNDLE_GEM"])
+            # for Ruby Core
+            gemspec = "lib/bundler.gemspec"
+          else
+            gemspec = "bundler.gemspec"
+          end
+          return nil if File.file?(File.join(current, gemspec))
+        end
+
+        names.each do |name|
+          filename = File.join(current, name)
+          yield filename
+        end
+        previous = current
+        current = File.expand_path("..", current)
+      end
+    end
+
+    def set_bundle_variables
+      begin
+        ENV["BUNDLE_BIN_PATH"] = Bundler.rubygems.bin_path("bundler", "bundle", VERSION)
+      rescue Gem::GemNotFoundException
+        if File.exist?(File.expand_path("../../../exe/bundle", __FILE__))
+          ENV["BUNDLE_BIN_PATH"] = File.expand_path("../../../exe/bundle", __FILE__)
+        else
+          ENV["BUNDLE_BIN_PATH"] = File.expand_path("../../../../bin/bundle", __FILE__)
+        end
+      end
+
+      # Set BUNDLE_GEMFILE
+      ENV["BUNDLE_GEMFILE"] = find_gemfile.to_s
+      ENV["BUNDLER_VERSION"] = Bundler::VERSION
+    end
+
+    def set_path
+      validate_bundle_path
+      paths = (ENV["PATH"] || "").split(File::PATH_SEPARATOR)
+      paths.unshift "#{Bundler.bundle_path}/bin"
+      ENV["PATH"] = paths.uniq.join(File::PATH_SEPARATOR)
+    end
+
+    def set_rubyopt
+      rubyopt = [ENV["RUBYOPT"]].compact
+      return if !rubyopt.empty? && rubyopt.first =~ %r{-rbundler/setup}
+      rubyopt.unshift %(-rbundler/setup)
+      ENV["RUBYOPT"] = rubyopt.join(" ")
+    end
+
+    def set_rubylib
+      rubylib = (ENV["RUBYLIB"] || "").split(File::PATH_SEPARATOR)
+      rubylib.unshift bundler_ruby_lib
+      ENV["RUBYLIB"] = rubylib.uniq.join(File::PATH_SEPARATOR)
+    end
+
+    def bundler_ruby_lib
+      File.expand_path("../..", __FILE__)
+    end
+
+    def clean_load_path
+      # handle 1.9 where system gems are always on the load path
+      return unless defined?(::Gem)
+
+      bundler_lib = bundler_ruby_lib
+
+      loaded_gem_paths = Bundler.rubygems.loaded_gem_paths
+
+      $LOAD_PATH.reject! do |p|
+        next if File.expand_path(p).start_with?(bundler_lib)
+        loaded_gem_paths.delete(p)
+      end
+      $LOAD_PATH.uniq!
+    end
+
+    def prints_major_deprecations?
+      require "bundler"
+      deprecation_release = Bundler::VERSION.split(".").drop(1).include?("99")
+      return false if !deprecation_release && !Bundler.settings[:major_deprecations]
+      require "bundler/deprecate"
+      return false if Bundler::Deprecate.skip
+      true
+    end
+
+    def deprecate_gemfile(gemfile)
+      return unless gemfile && File.basename(gemfile) == "Gemfile"
+      Bundler::SharedHelpers.major_deprecation \
+        "gems.rb and gems.locked will be preferred to Gemfile and Gemfile.lock."
+    end
+
+    extend self
+  end
+end