Merge branch 'jc/prompt-upstream'

An enhancement to the GIT_PS1_SHOWUPSTREAM facility.

* jc/prompt-upstream:
  git-prompt.sh: optionally show upstream branch name

contrib/completion/git-prompt.sh

@@ -60,6 +60,7 @@
 # of values:
 #
 #     verbose       show number of commits ahead/behind (+/-) upstream
+#     name          if verbose, then also show the upstream abbrev name
 #     legacy        don't use the '--count' option available in recent
 #                   versions of git-rev-list
 #     git           always compare HEAD to @{upstream}
@@ -94,7 +95,7 @@ __git_ps1_show_upstream ()
 {
 	local key value
 	local svn_remote svn_url_pattern count n
-	local upstream=git legacy="" verbose=""
+	local upstream=git legacy="" verbose="" name=""
 
 	svn_remote=()
 	# get some config options from git-config
@@ -122,6 +123,7 @@ __git_ps1_show_upstream ()
 		git|svn) upstream="$option" ;;
 		verbose) verbose=1 ;;
 		legacy)  legacy=1  ;;
+		name)    name=1 ;;
 		esac
 	done
 
@@ -204,6 +206,9 @@ __git_ps1_show_upstream ()
 		*)	    # diverged from upstream
 			p=" u+${count#*	}-${count%	*}" ;;
 		esac
+		if [[ -n "$count" && -n "$name" ]]; then
+			p="$p $(git rev-parse --abbrev-ref "$upstream" 2>/dev/null)"
+		fi
 	fi
 
 }