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, 24 insertions, 0 deletions

diff --git a/lib/bundler/process_lock.rb b/lib/bundler/process_lock.rb
new file mode 100644
index 0000000000..cba4fcdba5
--- /dev/null
+++ b/lib/bundler/process_lock.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+module Bundler
+  class ProcessLock
+    def self.lock(bundle_path = Bundler.bundle_path)
+      lock_file_path = File.join(bundle_path, "bundler.lock")
+      has_lock = false
+
+      File.open(lock_file_path, "w") do |f|
+        f.flock(File::LOCK_EX)
+        has_lock = true
+        yield
+        f.flock(File::LOCK_UN)
+      end
+    rescue Errno::EACCES, Errno::ENOLCK, *[SharedHelpers.const_get_safely(:ENOTSUP, Errno)].compact
+      # In the case the user does not have access to
+      # create the lock file or is using NFS where
+      # locks are not available we skip locking.
+      yield
+    ensure
+      FileUtils.rm_f(lock_file_path) if has_lock
+    end
+  end
+end