From 96b95a838a9a74f157f7aa99f5da8238e4b87928 Mon Sep 17 00:00:00 2001
From: Alyssa Ross <hi@alyssa.is>
Date: Sat, 12 May 2018 21:13:17 +0100
Subject: [PATCH] Fix brew pull with git commit.gpgsign enabled

Because of environment filtering, git tries to sign the commit but
can't find gpg, which means that the patch won't be applied.
---
 Library/Homebrew/dev-cmd/pull.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Library/Homebrew/dev-cmd/pull.rb b/Library/Homebrew/dev-cmd/pull.rb
index 3947846963..00adee83a7 100644
--- a/Library/Homebrew/dev-cmd/pull.rb
+++ b/Library/Homebrew/dev-cmd/pull.rb
@@ -102,6 +102,18 @@ module Homebrew
       ENV["GIT_COMMITTER_EMAIL"] = ENV["HOMEBREW_GIT_EMAIL"]
     end
 
+    # Depending on user configuration, git may try to invoke gpg.
+    begin
+      gnupg = Formula["gnupg"]
+    rescue FormulaUnavailableError # rubocop:disable Lint/HandleExceptions
+    else
+      if gnupg.installed?
+        path = PATH.new(ENV.fetch("PATH"))
+        path.prepend(gnupg.installed_prefix/"bin")
+        ENV["PATH"] = path
+      end
+    end
+
     do_bump = @args.bump? && !@args.clean?
 
     # Formulae with affected bottles that were published