From 3df81bc12f81a6b4f2c625ac16edfa4ad6b88049 Mon Sep 17 00:00:00 2001
From: Samuel Giddins <segiddins@segiddins.me>
Date: Fri, 28 Apr 2017 11:56:05 +0200
Subject: [Git] Only shorten refs if they are SHAs

---
 lib/bundler/source/git.rb |  8 ++++++--
 spec/install/git_spec.rb  | 22 ++++++++++++++++++++++
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/lib/bundler/source/git.rb b/lib/bundler/source/git.rb
index da48d64439..b3e218e390 100644
--- a/lib/bundler/source/git.rb
+++ b/lib/bundler/source/git.rb
@@ -61,8 +61,12 @@ module Bundler
       def to_s
         at = if local?
           path
-        elsif options["ref"]
-          shortref_for_display(options["ref"])
+        elsif user_ref = options["ref"]
+          if ref =~ /\A[a-z0-9]{4,}\z/i
+            shortref_for_display(user_ref)
+          else
+            user_ref
+          end
         else
           ref
         end
diff --git a/spec/install/git_spec.rb b/spec/install/git_spec.rb
index a555822012..04f2380b45 100644
--- a/spec/install/git_spec.rb
+++ b/spec/install/git_spec.rb
@@ -15,6 +15,28 @@ RSpec.describe "bundle install" do
       expect(the_bundle).to include_gems "foo 1.0", :source => "git@#{lib_path("foo")}"
     end
 
+    it "displays the ref of the gem repository when using branch~num as a ref" do
+      build_git "foo", "1.0", :path => lib_path("foo")
+      rev = revision_for(lib_path("foo"))[0..6]
+      update_git "foo", "2.0", :path => lib_path("foo"), :gemspec => true
+      rev2 = revision_for(lib_path("foo"))[0..6]
+      update_git "foo", "3.0", :path => lib_path("foo"), :gemspec => true
+
+      install_gemfile! <<-G
+        gem "foo", :git => "#{lib_path("foo")}", :ref => "master~2"
+      G
+
+      bundle! :install
+      expect(out).to include("Using foo 1.0 from #{lib_path("foo")} (at master~2@#{rev})")
+      expect(the_bundle).to include_gems "foo 1.0", :source => "git@#{lib_path("foo")}"
+
+      update_git "foo", "4.0", :path => lib_path("foo"), :gemspec => true
+
+      bundle! :update
+      expect(out).to include("Using foo 2.0 (was 1.0) from #{lib_path("foo")} (at master~2@#{rev2})")
+      expect(the_bundle).to include_gems "foo 2.0", :source => "git@#{lib_path("foo")}"
+    end
+
     it "should check out git repos that are missing but not being installed" do
       build_git "foo"
 
-- 
cgit v1.2.1