Subject: [PATCH v5 20/21] sparse-index: loose integration with cache_tree_verify()

From: "Derrick Stolee via GitGitGadget" <[email-masked]>
Date: Tue, 30 Mar 2021 13:11:03 +0000

From: Derrick Stolee <[email-masked]>

The cache_tree_verify() method is run when GIT_TEST_CHECK_CACHE_TREE
is enabled, which it is by default in the test suite. The logic must
be adjusted for the presence of these directory entries.

For now, leave the test as a simple check for whether the directory
entry is sparse. Do not go any further until needed.

This allows us to re-enable GIT_TEST_CHECK_CACHE_TREE in
t1092-sparse-checkout-compatibility.sh. Further,
p2000-sparse-operations.sh uses the test suite and hence this is enabled
for all tests. We need to integrate with it before we run our
performance tests with a sparse-index.

Signed-off-by: Derrick Stolee <[email-masked]>
---
 cache-tree.c                             | 19 +++++++++++++++++++
 t/t1092-sparse-checkout-compatibility.sh |  3 ---
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/cache-tree.c b/cache-tree.c
index 950a9615db8f..11bf1fcae6e1 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -808,6 +808,19 @@ int cache_tree_matches_traversal(struct cache_tree *root,
 	return 0;
 }
 
+static void verify_one_sparse(struct repository *r,
+			      struct index_state *istate,
+			      struct cache_tree *it,
+			      struct strbuf *path,
+			      int pos)
+{
+	struct cache_entry *ce = istate->cache[pos];
+
+	if (!S_ISSPARSEDIR(ce->ce_mode))
+		BUG("directory '%s' is present in index, but not sparse",
+		    path->buf);
+}
+
 static void verify_one(struct repository *r,
 		       struct index_state *istate,
 		       struct cache_tree *it,
@@ -830,6 +843,12 @@ static void verify_one(struct repository *r,
 
 	if (path->len) {
 		pos = index_name_pos(istate, path->buf, path->len);
+
+		if (pos >= 0) {
+			verify_one_sparse(r, istate, it, path, pos);
+			return;
+		}
+
 		pos = -pos - 1;
 	} else {
 		pos = 0;
diff --git a/t/t1092-sparse-checkout-compatibility.sh b/t/t1092-sparse-checkout-compatibility.sh
index 472c5337de1b..12e6c453024f 100755
--- a/t/t1092-sparse-checkout-compatibility.sh
+++ b/t/t1092-sparse-checkout-compatibility.sh
@@ -2,9 +2,6 @@
 
 test_description='compare full workdir to sparse workdir'
 
-# The verify_cache_tree() check is not sparse-aware (yet).
-# So, disable the check until that integration is complete.
-GIT_TEST_CHECK_CACHE_TREE=0
 GIT_TEST_SPLIT_INDEX=0
 GIT_TEST_SPARSE_INDEX=
 
-- 
gitgitgadget