From: Jakub Jirutka <jakub@jirutka.cz>
Date: Wed, 07 Mar 2018 17:24:00 +0200
Subject: Don't fetch grpc gem from RubyGems

Grpc gem is total shit, doesn't build from source without patching,
embeds three third-party libs including Google's very own fork of
OpenSSL and root CAs, contains a lot of bloat etc.

Therefore I install this shit from my Alpine package and
copy it into vendor/ before running bundler.

This patch also downgrades grpc and google-protobuf (reverts
https://gitlab.com/gitlab-org/gitaly/-/commit/7fbf17ddbd385b014d284b78dbaf832310e41add)
to the same version gitlab-foss uses. It's just to avoid dealing with
ruby-grpc upgrade.

--- a/ruby/Gemfile
+++ b/ruby/Gemfile
@@ -10 +10,2 @@
-gem 'grpc', '~> 1.42.0' # keep in lock-step with grpc-tools
+# This Google gem is totally messed, we handle it specially.
+gem 'grpc', path: 'vendor/grpc', require: false
--- a/ruby/Gemfile.lock
+++ b/ruby/Gemfile.lock
@@ -1,3 +1,9 @@
+PATH
+  remote: vendor/grpc
+  specs:
+    grpc (1.42.0)
+      google-protobuf (~> 3.18)
+
 GEM
   remote: https://rubygems.org/
   specs:
@@ -84,9 +90,6 @@
     google-protobuf (3.21.3)
     googleapis-common-protos-types (1.3.0)
       google-protobuf (~> 3.14)
-    grpc (1.42.0)
-      google-protobuf (~> 3.18)
-      googleapis-common-protos-types (~> 1.0)
     grpc-tools (1.42.0)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
@@ -235,7 +238,7 @@
   gitlab-license_finder
   gitlab-markup (~> 1.7.1)
   google-protobuf (~> 3.21.0)
-  grpc (~> 1.42.0)
+  grpc!
   grpc-tools (~> 1.42.0)
   licensee (~> 9.14.1)
   pry (~> 0.12.2)