From: Jeff Hostetler <jeffhost@xxxxxxxxxxxxx>
Create a filter for traverse_commit_list_filtered() to omit
blobs larger than a requested size from the result, but always
include ".git*" special files.
This filter will be used in a future commit by rev-list and
pack-objects for partial/narrow clone/fetch.
Signed-off-by: Jeff Hostetler <jeffhost@xxxxxxxxxxxxx>
---
list-objects-filters.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++
list-objects-filters.h | 12 +++++++
2 files changed, 109 insertions(+)
diff --git a/list-objects-filters.c b/list-objects-filters.c
index f29d8bc..f04d70e 100644
--- a/list-objects-filters.c
+++ b/list-objects-filters.c
@@ -83,3 +83,100 @@ void traverse_commit_list_omit_all_blobs(
oidset2_clear(&d.omits);
}
+
+/*
+ * A filter for list-objects to omit large blobs,
+ * but always include ".git*" special files.
+ */
+struct filter_omit_large_blobs_data {
+ struct oidset2 omits;
+ int64_t max_bytes;
+};
+
+static list_objects_filter_result filter_omit_large_blobs(
+ list_objects_filter_type filter_type,
+ struct object *obj,
+ const char *pathname,
+ const char *filename,
+ void *filter_data_)
+{
+ struct filter_omit_large_blobs_data *filter_data = filter_data_;
+ int64_t object_length = -1;
+ unsigned long s;
+ enum object_type t;
+
+ switch (filter_type) {
+ default:
+ die("unkown filter_type");
+ return LOFR_ZERO;
+
+ case LOFT_BEGIN_TREE:
+ assert(obj->type == OBJ_TREE);
+ /* always include all tree objects */
+ return LOFR_MARK_SEEN | LOFR_SHOW;
+
+ case LOFT_END_TREE:
+ assert(obj->type == OBJ_TREE);
+ return LOFR_ZERO;
+
+ case LOFT_BLOB:
+ assert(obj->type == OBJ_BLOB);
+ assert((obj->flags & SEEN) == 0);
+
+ /*
+ * If previously provisionally omitted (because of size), see if the
+ * current filename is special and force it to be included.
+ */
+ if (oidset2_contains(&filter_data->omits, &obj->oid)) {
+ if ((strncmp(filename, ".git", 4) == 0) && filename[4]) {
+ oidset2_remove(&filter_data->omits, &obj->oid);
+ return LOFR_MARK_SEEN | LOFR_SHOW;
+ }
+ return LOFR_ZERO; /* continue provisionally omitting it */
+ }
+
+ t = sha1_object_info(obj->oid.hash, &s);
+ assert(t == OBJ_BLOB);
+ object_length = (int64_t)((uint64_t)(s));
+
+ if (object_length < filter_data->max_bytes)
+ return LOFR_MARK_SEEN | LOFR_SHOW;
+
+ /*
+ * Provisionally omit it. We've already established that this blob
+ * is too big and doesn't have a special filename, so we WANT to
+ * omit it. However, there may be a special file elsewhere in the
+ * tree that references this same blob, so we cannot reject it yet.
+ * Leave the LOFR_ bits unset so that if the blob appears again in
+ * the traversal, we will be asked again.
+ *
+ * No need for a pathname, since we only test for special filenames
+ * above.
+ */
+ oidset2_insert(&filter_data->omits, &obj->oid, object_length,
+ NULL);
+ return LOFR_ZERO;
+ }
+}
+
+void traverse_commit_list_omit_large_blobs(
+ struct rev_info *revs,
+ show_commit_fn show_commit,
+ show_object_fn show_object,
+ oidset2_foreach_cb print_omitted_object,
+ void *ctx_data,
+ int64_t large_byte_limit)
+{
+ struct filter_omit_large_blobs_data d;
+
+ memset(&d, 0, sizeof(d));
+ d.max_bytes = large_byte_limit;
+
+ traverse_commit_list_filtered(revs, show_commit, show_object, ctx_data,
+ filter_omit_large_blobs, &d);
+
+ if (print_omitted_object)
+ oidset2_foreach(&d.omits, print_omitted_object, ctx_data);
+
+ oidset2_clear(&d.omits);
+}
diff --git a/list-objects-filters.h b/list-objects-filters.h
index b981020..32b2833 100644
--- a/list-objects-filters.h
+++ b/list-objects-filters.h
@@ -14,4 +14,16 @@ void traverse_commit_list_omit_all_blobs(
oidset2_foreach_cb print_omitted_object,
void *ctx_data);
+/*
+ * A filter for list-objects to omit large blobs,
+ * but always include ".git*" special files.
+ */
+void traverse_commit_list_omit_large_blobs(
+ struct rev_info *revs,
+ show_commit_fn show_commit,
+ show_object_fn show_object,
+ oidset2_foreach_cb print_omitted_object,
+ void *ctx_data,
+ int64_t large_byte_limit);
+
#endif /* LIST_OBJECTS_FILTERS_H */
--
2.9.3
