Merge bundler to standard libraries.

  rubygems 2.7.x depends bundler-1.15.x. This is preparation for
  rubygems and bundler migration.

  * lib/bundler.rb, lib/bundler/*: files of bundler-1.15.4
  * spec/bundler/*: rspec examples of bundler-1.15.4. I applied patches.
    * https://github.com/bundler/bundler/pull/6007
    * Exclude not working examples on ruby repository.
    * Fake ruby interpriter instead of installed ruby.
  * Makefile.in: Added test task named `test-bundler`. This task is only
    working macOS/linux yet. I'm going to support Windows environment later.
  * tool/sync_default_gems.rb: Added sync task for bundler.

  [Feature #12733][ruby-core:77172]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59779 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 132 insertions, 0 deletions

diff --git a/lib/bundler/endpoint_specification.rb b/lib/bundler/endpoint_specification.rb
new file mode 100644
index 0000000000..5a1deeea47
--- /dev/null
+++ b/lib/bundler/endpoint_specification.rb
@@ -0,0 +1,132 @@
+# frozen_string_literal: true
+module Bundler
+  # used for Creating Specifications from the Gemcutter Endpoint
+  class EndpointSpecification < Gem::Specification
+    ILLFORMED_MESSAGE = 'Ill-formed requirement ["#<YAML::Syck::DefaultKey'.freeze
+    include MatchPlatform
+
+    attr_reader :name, :version, :platform, :required_rubygems_version, :required_ruby_version, :checksum
+    attr_accessor :source, :remote, :dependencies
+
+    def initialize(name, version, platform, dependencies, metadata = nil)
+      @name         = name
+      @version      = Gem::Version.create version
+      @platform     = platform
+      @dependencies = dependencies.map {|dep, reqs| build_dependency(dep, reqs) }
+
+      parse_metadata(metadata)
+    end
+
+    def fetch_platform
+      @platform
+    end
+
+    # needed for standalone, load required_paths from local gemspec
+    # after the gem is installed
+    def require_paths
+      if @remote_specification
+        @remote_specification.require_paths
+      elsif _local_specification
+        _local_specification.require_paths
+      else
+        super
+      end
+    end
+
+    # needed for inline
+    def load_paths
+      # remote specs aren't installed, and can't have load_paths
+      if _local_specification
+        _local_specification.load_paths
+      else
+        super
+      end
+    end
+
+    # needed for binstubs
+    def executables
+      if @remote_specification
+        @remote_specification.executables
+      elsif _local_specification
+        _local_specification.executables
+      else
+        super
+      end
+    end
+
+    # needed for bundle clean
+    def bindir
+      if @remote_specification
+        @remote_specification.bindir
+      elsif _local_specification
+        _local_specification.bindir
+      else
+        super
+      end
+    end
+
+    # needed for post_install_messages during install
+    def post_install_message
+      if @remote_specification
+        @remote_specification.post_install_message
+      elsif _local_specification
+        _local_specification.post_install_message
+      end
+    end
+
+    # needed for "with native extensions" during install
+    def extensions
+      if @remote_specification
+        @remote_specification.extensions
+      elsif _local_specification
+        _local_specification.extensions
+      end
+    end
+
+    def _local_specification
+      return unless @loaded_from && File.exist?(local_specification_path)
+      eval(File.read(local_specification_path)).tap do |spec|
+        spec.loaded_from = @loaded_from
+      end
+    end
+
+    def __swap__(spec)
+      SharedHelpers.ensure_same_dependencies(self, dependencies, spec.dependencies)
+      @remote_specification = spec
+    end
+
+  private
+
+    def local_specification_path
+      "#{base_dir}/specifications/#{full_name}.gemspec"
+    end
+
+    def parse_metadata(data)
+      return unless data
+      data.each do |k, v|
+        next unless v
+        case k.to_s
+        when "checksum"
+          @checksum = v.last
+        when "rubygems"
+          @required_rubygems_version = Gem::Requirement.new(v)
+        when "ruby"
+          @required_ruby_version = Gem::Requirement.new(v)
+        end
+      end
+    rescue => e
+      raise GemspecError, "There was an error parsing the metadata for the gem #{name} (#{version}): #{e.class}\n#{e}\nThe metadata was #{data.inspect}"
+    end
+
+    def build_dependency(name, requirements)
+      Gem::Dependency.new(name, requirements)
+    rescue ArgumentError => e
+      raise unless e.message.include?(ILLFORMED_MESSAGE)
+      puts # we shouldn't print the error message on the "fetching info" status line
+      raise GemspecError,
+        "Unfortunately, the gem #{name} (#{version}) has an invalid " \
+        "gemspec.\nPlease ask the gem author to yank the bad version to fix " \
+        "this issue. For more information, see http://bit.ly/syck-defaultkey."
+    end
+  end
+end