Commit c40fdd01 authored by Max A.K.'s avatar Max A.K. Committed by Junio C Hamano

reachable.c: add HEAD to reachability starting commits

HEAD is not explicitly used as a starting commit for
calculating reachability, so if it's detached and reflogs
are disabled it may be pruned.

Add tests which demonstrate it. Test 'prune: prune former HEAD after checking
out branch' also reverts changes to repository.
Signed-off-by: Max A.K.'s avatarMax Kirillov <>
Signed-off-by: default avatarJunio C Hamano <>
parent 96db324a
......@@ -229,6 +229,9 @@ void mark_reachable_objects(struct rev_info *revs, int mark_reflog,
/* Add all external refs */
for_each_ref(add_one_ref, revs);
/* detached HEAD is not included in the list above */
head_ref(add_one_ref, revs);
/* Add all reflog info */
if (mark_reflog)
for_each_reflog(add_one_reflog, revs);
......@@ -104,6 +104,28 @@ test_expect_success 'prune: prune unreachable heads' '
test_expect_success 'prune: do not prune detached HEAD with no reflog' '
git checkout --detach --quiet &&
git commit --allow-empty -m "detached commit" &&
# verify that there is no reflogs
# (should be removed and disabled by previous test)
test ! -e .git/logs &&
git prune -n >prune_actual &&
: >prune_expected &&
test_cmp prune_actual prune_expected
test_expect_success 'prune: prune former HEAD after checking out branch' '
head_sha1=$(git rev-parse HEAD) &&
git checkout --quiet master &&
git prune -v >prune_actual &&
grep "$head_sha1" prune_actual
test_expect_success 'prune: do not prune heads listed as an argument' '
: > file2 &&
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