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-rw-r--r--cache-tree.c101
1 files changed, 84 insertions, 17 deletions
diff --git a/cache-tree.c b/cache-tree.c
index 45e58666af..65ca993361 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -237,6 +237,11 @@ int cache_tree_fully_valid(struct cache_tree *it)
return 1;
}
+static int must_check_existence(const struct cache_entry *ce)
+{
+ return !(has_promisor_remote() && ce_skip_worktree(ce));
+}
+
static int update_one(struct cache_tree *it,
struct cache_entry **cache,
int entries,
@@ -378,8 +383,7 @@ static int update_one(struct cache_tree *it,
}
ce_missing_ok = mode == S_IFGITLINK || missing_ok ||
- (has_promisor_remote() &&
- ce_skip_worktree(ce));
+ !must_check_existence(ce);
if (is_null_oid(oid) ||
(!ce_missing_ok && !has_object_file(oid))) {
strbuf_release(&buffer);
@@ -436,8 +440,9 @@ static int update_one(struct cache_tree *it,
} else if (dryrun) {
hash_object_file(the_hash_algo, buffer.buf, buffer.len,
tree_type, &it->oid);
- } else if (write_object_file(buffer.buf, buffer.len, tree_type,
- &it->oid)) {
+ } else if (write_object_file_flags(buffer.buf, buffer.len, tree_type,
+ &it->oid, flags & WRITE_TREE_SILENT
+ ? HASH_SILENT : 0)) {
strbuf_release(&buffer);
return -1;
}
@@ -461,11 +466,12 @@ int cache_tree_update(struct index_state *istate, int flags)
if (i)
return i;
- ensure_full_index(istate);
-
if (!istate->cache_tree)
istate->cache_tree = cache_tree();
+ if (!(flags & WRITE_TREE_MISSING_OK) && has_promisor_remote())
+ prefetch_cache_entries(istate, must_check_existence);
+
trace_performance_enter();
trace2_region_enter("cache_tree", "update", the_repository);
i = update_one(istate->cache_tree, istate->cache, istate->cache_nr,
@@ -735,15 +741,26 @@ out:
return ret;
}
+static void prime_cache_tree_sparse_dir(struct cache_tree *it,
+ struct tree *tree)
+{
+
+ oidcpy(&it->oid, &tree->object.oid);
+ it->entry_count = 1;
+}
+
static void prime_cache_tree_rec(struct repository *r,
struct cache_tree *it,
- struct tree *tree)
+ struct tree *tree,
+ struct strbuf *tree_path)
{
struct tree_desc desc;
struct name_entry entry;
int cnt;
+ int base_path_len = tree_path->len;
oidcpy(&it->oid, &tree->object.oid);
+
init_tree_desc(&desc, tree->buffer, tree->size);
cnt = 0;
while (tree_entry(&desc, &entry)) {
@@ -752,14 +769,40 @@ static void prime_cache_tree_rec(struct repository *r,
else {
struct cache_tree_sub *sub;
struct tree *subtree = lookup_tree(r, &entry.oid);
+
if (!subtree->object.parsed)
parse_tree(subtree);
sub = cache_tree_sub(it, entry.path);
sub->cache_tree = cache_tree();
- prime_cache_tree_rec(r, sub->cache_tree, subtree);
+
+ /*
+ * Recursively-constructed subtree path is only needed when working
+ * in a sparse index (where it's used to determine whether the
+ * subtree is a sparse directory in the index).
+ */
+ if (r->index->sparse_index) {
+ strbuf_setlen(tree_path, base_path_len);
+ strbuf_grow(tree_path, base_path_len + entry.pathlen + 1);
+ strbuf_add(tree_path, entry.path, entry.pathlen);
+ strbuf_addch(tree_path, '/');
+ }
+
+ /*
+ * If a sparse index is in use, the directory being processed may be
+ * sparse. To confirm that, we can check whether an entry with that
+ * exact name exists in the index. If it does, the created subtree
+ * should be sparse. Otherwise, cache tree expansion should continue
+ * as normal.
+ */
+ if (r->index->sparse_index &&
+ index_entry_exists(r->index, tree_path->buf, tree_path->len))
+ prime_cache_tree_sparse_dir(sub->cache_tree, subtree);
+ else
+ prime_cache_tree_rec(r, sub->cache_tree, subtree, tree_path);
cnt += sub->cache_tree->entry_count;
}
}
+
it->entry_count = cnt;
}
@@ -767,11 +810,14 @@ void prime_cache_tree(struct repository *r,
struct index_state *istate,
struct tree *tree)
{
+ struct strbuf tree_path = STRBUF_INIT;
+
trace2_region_enter("cache-tree", "prime_cache_tree", the_repository);
cache_tree_free(&istate->cache_tree);
istate->cache_tree = cache_tree();
- prime_cache_tree_rec(r, istate->cache_tree, tree);
+ prime_cache_tree_rec(r, istate->cache_tree, tree, &tree_path);
+ strbuf_release(&tree_path);
istate->cache_changed |= CACHE_TREE_CHANGED;
trace2_region_leave("cache-tree", "prime_cache_tree", the_repository);
}
@@ -821,10 +867,17 @@ static void verify_one_sparse(struct repository *r,
path->buf);
}
-static void verify_one(struct repository *r,
- struct index_state *istate,
- struct cache_tree *it,
- struct strbuf *path)
+/*
+ * Returns:
+ * 0 - Verification completed.
+ * 1 - Restart verification - a call to ensure_full_index() freed the cache
+ * tree that is being verified and verification needs to be restarted from
+ * the new toplevel cache tree.
+ */
+static int verify_one(struct repository *r,
+ struct index_state *istate,
+ struct cache_tree *it,
+ struct strbuf *path)
{
int i, pos, len = path->len;
struct strbuf tree_buf = STRBUF_INIT;
@@ -832,21 +885,30 @@ static void verify_one(struct repository *r,
for (i = 0; i < it->subtree_nr; i++) {
strbuf_addf(path, "%s/", it->down[i]->name);
- verify_one(r, istate, it->down[i]->cache_tree, path);
+ if (verify_one(r, istate, it->down[i]->cache_tree, path))
+ return 1;
strbuf_setlen(path, len);
}
if (it->entry_count < 0 ||
/* no verification on tests (t7003) that replace trees */
lookup_replace_object(r, &it->oid) != &it->oid)
- return;
+ return 0;
if (path->len) {
+ /*
+ * If the index is sparse and the cache tree is not
+ * index_name_pos() may trigger ensure_full_index() which will
+ * free the tree that is being verified.
+ */
+ int is_sparse = istate->sparse_index;
pos = index_name_pos(istate, path->buf, path->len);
+ if (is_sparse && !istate->sparse_index)
+ return 1;
if (pos >= 0) {
verify_one_sparse(r, istate, it, path, pos);
- return;
+ return 0;
}
pos = -pos - 1;
@@ -894,6 +956,7 @@ static void verify_one(struct repository *r,
oid_to_hex(&new_oid), oid_to_hex(&it->oid));
strbuf_setlen(path, len);
strbuf_release(&tree_buf);
+ return 0;
}
void cache_tree_verify(struct repository *r, struct index_state *istate)
@@ -902,6 +965,10 @@ void cache_tree_verify(struct repository *r, struct index_state *istate)
if (!istate->cache_tree)
return;
- verify_one(r, istate, istate->cache_tree, &path);
+ if (verify_one(r, istate, istate->cache_tree, &path)) {
+ strbuf_reset(&path);
+ if (verify_one(r, istate, istate->cache_tree, &path))
+ BUG("ensure_full_index() called twice while verifying cache tree");
+ }
strbuf_release(&path);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 02:25:59 +0000