Commit 0efa3d74 authored by Junio C Hamano's avatar Junio C Hamano

Merge branch 'nd/split-index-null-base-fix'

Split-index fix.

* nd/split-index-null-base-fix:
  read-cache.c: fix writing "link" index ext with null base oid
parents ebf846c0 6e37c8ed
......@@ -2900,7 +2900,8 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
return -1;
}
if (!strip_extensions && istate->split_index) {
if (!strip_extensions && istate->split_index &&
!is_null_oid(&istate->split_index->base_oid)) {
struct strbuf sb = STRBUF_INIT;
err = write_link_extension(&sb, istate) < 0 ||
......@@ -3195,7 +3196,7 @@ int write_locked_index(struct index_state *istate, struct lock_file *lock,
ret = write_split_index(istate, lock, flags);
/* Freshen the shared index only if the split-index was written */
if (!ret && !new_shared_index) {
if (!ret && !new_shared_index && !is_null_oid(&si->base_oid)) {
const char *shared_index = git_path("sharedindex.%s",
oid_to_hex(&si->base_oid));
freshen_shared_index(shared_index, 1);
......
......@@ -440,24 +440,26 @@ void add_split_index(struct index_state *istate)
void remove_split_index(struct index_state *istate)
{
if (istate->split_index) {
/*
* When removing the split index, we need to move
* ownership of the mem_pool associated with the
* base index to the main index. There may be cache entries
* allocated from the base's memory pool that are shared with
* the_index.cache[].
*/
mem_pool_combine(istate->ce_mem_pool, istate->split_index->base->ce_mem_pool);
if (istate->split_index->base) {
/*
* When removing the split index, we need to move
* ownership of the mem_pool associated with the
* base index to the main index. There may be cache entries
* allocated from the base's memory pool that are shared with
* the_index.cache[].
*/
mem_pool_combine(istate->ce_mem_pool,
istate->split_index->base->ce_mem_pool);
/*
* The split index no longer owns the mem_pool backing
* its cache array. As we are discarding this index,
* mark the index as having no cache entries, so it
* will not attempt to clean up the cache entries or
* validate them.
*/
if (istate->split_index->base)
/*
* The split index no longer owns the mem_pool backing
* its cache array. As we are discarding this index,
* mark the index as having no cache entries, so it
* will not attempt to clean up the cache entries or
* validate them.
*/
istate->split_index->base->cache_nr = 0;
}
/*
* We can discard the split index because its
......
......@@ -472,4 +472,22 @@ test_expect_success 'writing split index with null sha1 does not write cache tre
test_line_count = 0 cache-tree.out
'
test_expect_success 'do not refresh null base index' '
test_create_repo merge &&
(
cd merge &&
test_commit initial &&
git checkout -b side-branch &&
test_commit extra &&
git checkout master &&
git update-index --split-index &&
test_commit more &&
# must not write a new shareindex, or we wont catch the problem
git -c splitIndex.maxPercentChange=100 merge --no-edit side-branch 2>err &&
# i.e. do not expect warnings like
# could not freshen shared index .../shareindex.00000...
test_must_be_empty err
)
'
test_done
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