Added bundler as default gems. Revisit [Feature #12733]

  * bin/*, lib/bundler/*, lib/bundler.rb, spec/bundler, man/*:
    Merge from latest stable branch of bundler/bundler repository and
    added workaround patches. I will backport them into upstream.
  * common.mk, defs/gmake.mk: Added `test-bundler` task for test suite
    of bundler.
  * tool/sync_default_gems.rb: Added sync task for bundler.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65509 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/bundler/build_metadata.rb b/lib/bundler/build_metadata.rb
new file mode 100644
index 0000000000..a0428f0319
--- /dev/null
+++ b/lib/bundler/build_metadata.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+module Bundler
+  # Represents metadata from when the Bundler gem was built.
+  module BuildMetadata
+    # begin ivars
+    @release = false
+    # end ivars
+
+    # A hash representation of the build metadata.
+    def self.to_h
+      {
+        "Built At" => built_at,
+        "Git SHA" => git_commit_sha,
+        "Released Version" => release?,
+      }
+    end
+
+    # A string representing the date the bundler gem was built.
+    def self.built_at
+      @built_at ||= Time.now.utc.strftime("%Y-%m-%d").freeze
+    end
+
+    # The SHA for the git commit the bundler gem was built from.
+    def self.git_commit_sha
+      return @git_commit_sha if @git_commit_sha
+
+      # If Bundler has been installed without its .git directory and without a
+      # commit instance variable then we can't determine its commits SHA.
+      git_dir = File.join(File.expand_path("../../..", __FILE__), ".git")
+      return "unknown" unless File.directory?(git_dir)
+
+      # Otherwise shell out to git.
+      @git_commit_sha = Dir.chdir(File.expand_path("..", __FILE__)) do
+        `git rev-parse --short HEAD`.strip.freeze
+      end
+    end
+
+    # Whether this is an official release build of Bundler.
+    def self.release?
+      @release
+    end
+  end
+end