Merge branch 'rh/peeling-tag-to-tag'

Make "foo^{tag}" to peel a tag to itself, i.e. no-op., and fail if
"foo" is not a tag.  "git rev-parse --verify v1.0^{tag}" would be a
more convenient way to say "test $(git cat-file -t v1.0) = tag".

* rh/peeling-tag-to-tag:
  peel_onion: do not assume length of x_type globals
  peel_onion(): add support for <rev>^{tag}

1 files changed, 7 insertions, 0 deletions

diff --git a/t/t1511-rev-parse-caret.sh b/t/t1511-rev-parse-caret.sh
index eaefc777bd..15973f2094 100755
--- a/t/t1511-rev-parse-caret.sh
+++ b/t/t1511-rev-parse-caret.sh
@@ -54,6 +54,13 @@ test_expect_success 'ref^{tree}' '
 	test_must_fail git rev-parse blob-tag^{tree}
 '
 
+test_expect_success 'ref^{tag}' '
+	test_must_fail git rev-parse HEAD^{tag} &&
+	git rev-parse commit-tag >expected &&
+	git rev-parse commit-tag^{tag} >actual &&
+	test_cmp expected actual
+'
+
 test_expect_success 'ref^{/.}' '
 	git rev-parse master >expected &&
 	git rev-parse master^{/.} >actual &&