[Git] Only shorten refs if they are SHAs

lib/bundler/source/git.rb

@@ -61,8 +61,12 @@ def eql?(other)
       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

spec/install/git_spec.rb

@@ -15,6 +15,28 @@
       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"
 

spec/support/builders.rb

@@ -659,6 +659,7 @@ def silently(str)
       def _build(options)
         libpath = options[:path] || _default_path
         update_gemspec = options[:gemspec] || false
+        source = options[:source] || "git@#{libpath}"
 
         Dir.chdir(libpath) do
           silently "git checkout master"
@@ -684,7 +685,7 @@ def _build(options)
           _default_files.keys.each do |path|
             _default_files[path] += "\n#{Builders.constantize(name)}_PREV_REF = '#{current_ref}'"
           end
-          super(options.merge(:path => libpath, :gemspec => update_gemspec))
+          super(options.merge(:path => libpath, :gemspec => update_gemspec, :source => source))
           `git add *`
           `git commit -m "BUMP"`
         end