rev-parse: Add support for the ^! and ^@ syntax

Those shorthands are explained in the rev-parse documentation but were not
actually supported by rev-parse itself.

gitk internally uses rev-parse to interpret its command line arguments, and
being able to use these "limit with parents" syntax is handy there.

Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/t/t6101-rev-parse-parents.sh b/t/t6101-rev-parse-parents.sh
index efc8313..919552a 100755
--- a/t/t6101-rev-parse-parents.sh
+++ b/t/t6101-rev-parse-parents.sh
@@ -28,6 +28,8 @@ test_expect_success 'final^1^2 != final^1^1' "test $(git rev-parse final^1^2) !=
 test_expect_success 'final^1^3 not valid' "if git rev-parse --verify final^1^3; then false; else :; fi"
 test_expect_success '--verify start2^1' 'test_must_fail git rev-parse --verify start2^1'
 test_expect_success '--verify start2^0' 'git rev-parse --verify start2^0'
+test_expect_success 'final^1^@ = final^1^1 final^1^2' "test \"$(git rev-parse final^1^@)\" = \"$(git rev-parse final^1^1 final^1^2)\""
+test_expect_success 'final^1^! = final^1 ^final^1^1 ^final^1^2' "test \"$(git rev-parse final^1^\!)\" = \"$(git rev-parse final^1 ^final^1^1 ^final^1^2)\""
 
 test_expect_success 'repack for next test' 'git repack -a -d'
 test_expect_success 'short SHA-1 works' '