completion: support excluding full refs

Commit 49416ad22 (completion: support excluding refs, 2016-08-24) made
possible to complete short refs with a '^' prefix.

Extend the support to full refs to make completing '^refs/...' work.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/completion/git-completion.bash

@@ -387,6 +387,10 @@ __git_refs ()
 	fi
 
 	if [ "$list_refs_from" = path ]; then
+		if [[ "$cur_" == ^* ]]; then
+			pfx="^"
+			cur_=${cur_#^}
+		fi
 		case "$cur_" in
 		refs|refs/*)
 			format="refname"
@@ -394,10 +398,6 @@ __git_refs ()
 			track=""
 			;;
 		*)
-			if [[ "$cur_" == ^* ]]; then
-				pfx="^"
-				cur_=${cur_#^}
-			fi
 			for i in HEAD FETCH_HEAD ORIG_HEAD MERGE_HEAD; do
 				if [ -e "$dir/$i" ]; then echo $pfx$i; fi
 			done

t/t9902-completion.sh

@@ -806,6 +806,37 @@ test_expect_success '__git_refs - after --opt= - full refs' '
 	test_cmp expected "$actual"
 '
 
+test_expect_success '__git refs - exluding refs' '
+	cat >expected <<-EOF &&
+	^HEAD
+	^master
+	^matching-branch
+	^other/branch-in-other
+	^other/master-in-other
+	^matching-tag
+	EOF
+	(
+		cur=^ &&
+		__git_refs >"$actual"
+	) &&
+	test_cmp expected "$actual"
+'
+
+test_expect_success '__git refs - exluding full refs' '
+	cat >expected <<-EOF &&
+	^refs/heads/master
+	^refs/heads/matching-branch
+	^refs/remotes/other/branch-in-other
+	^refs/remotes/other/master-in-other
+	^refs/tags/matching-tag
+	EOF
+	(
+		cur=^refs/ &&
+		__git_refs >"$actual"
+	) &&
+	test_cmp expected "$actual"
+'
+
 test_expect_success '__git_complete_refs - simple' '
 	sed -e "s/Z$//" >expected <<-EOF &&
 	HEAD Z