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-rw-r--r--list-objects-filter.c122
1 files changed, 102 insertions, 20 deletions
diff --git a/list-objects-filter.c b/list-objects-filter.c
index a62624a..ee449de 100644
--- a/list-objects-filter.c
+++ b/list-objects-filter.c
@@ -10,6 +10,7 @@
#include "list-objects.h"
#include "list-objects-filter.h"
#include "list-objects-filter-options.h"
+#include "oidmap.h"
#include "oidset.h"
#include "object-store.h"
@@ -84,11 +85,44 @@ static void *filter_blobs_none__init(
* A filter for list-objects to omit ALL trees and blobs from the traversal.
* Can OPTIONALLY collect a list of the omitted OIDs.
*/
-struct filter_trees_none_data {
+struct filter_trees_depth_data {
struct oidset *omits;
+
+ /*
+ * Maps trees to the minimum depth at which they were seen. It is not
+ * necessary to re-traverse a tree at deeper or equal depths than it has
+ * already been traversed.
+ *
+ * We can't use LOFR_MARK_SEEN for tree objects since this will prevent
+ * it from being traversed at shallower depths.
+ */
+ struct oidmap seen_at_depth;
+
+ unsigned long exclude_depth;
+ unsigned long current_depth;
};
-static enum list_objects_filter_result filter_trees_none(
+struct seen_map_entry {
+ struct oidmap_entry base;
+ size_t depth;
+};
+
+/* Returns 1 if the oid was in the omits set before it was invoked. */
+static int filter_trees_update_omits(
+ struct object *obj,
+ struct filter_trees_depth_data *filter_data,
+ int include_it)
+{
+ if (!filter_data->omits)
+ return 0;
+
+ if (include_it)
+ return oidset_remove(filter_data->omits, &obj->oid);
+ else
+ return oidset_insert(filter_data->omits, &obj->oid);
+}
+
+static enum list_objects_filter_result filter_trees_depth(
struct repository *r,
enum list_objects_filter_situation filter_situation,
struct object *obj,
@@ -96,43 +130,91 @@ static enum list_objects_filter_result filter_trees_none(
const char *filename,
void *filter_data_)
{
- struct filter_trees_none_data *filter_data = filter_data_;
+ struct filter_trees_depth_data *filter_data = filter_data_;
+ struct seen_map_entry *seen_info;
+ int include_it = filter_data->current_depth <
+ filter_data->exclude_depth;
+ int filter_res;
+ int already_seen;
+
+ /*
+ * Note that we do not use _MARK_SEEN in order to allow re-traversal in
+ * case we encounter a tree or blob again at a shallower depth.
+ */
switch (filter_situation) {
default:
BUG("unknown filter_situation: %d", filter_situation);
- case LOFS_BEGIN_TREE:
+ case LOFS_END_TREE:
+ assert(obj->type == OBJ_TREE);
+ filter_data->current_depth--;
+ return LOFR_ZERO;
+
case LOFS_BLOB:
- if (filter_data->omits) {
- oidset_insert(filter_data->omits, &obj->oid);
- /* _MARK_SEEN but not _DO_SHOW (hard omit) */
- return LOFR_MARK_SEEN;
+ filter_trees_update_omits(obj, filter_data, include_it);
+ return include_it ? LOFR_MARK_SEEN | LOFR_DO_SHOW : LOFR_ZERO;
+
+ case LOFS_BEGIN_TREE:
+ seen_info = oidmap_get(
+ &filter_data->seen_at_depth, &obj->oid);
+ if (!seen_info) {
+ seen_info = xcalloc(1, sizeof(*seen_info));
+ oidcpy(&seen_info->base.oid, &obj->oid);
+ seen_info->depth = filter_data->current_depth;
+ oidmap_put(&filter_data->seen_at_depth, seen_info);
+ already_seen = 0;
} else {
- /*
- * Not collecting omits so no need to to traverse tree.
- */
- return LOFR_SKIP_TREE | LOFR_MARK_SEEN;
+ already_seen =
+ filter_data->current_depth >= seen_info->depth;
}
- case LOFS_END_TREE:
- assert(obj->type == OBJ_TREE);
- return LOFR_ZERO;
+ if (already_seen) {
+ filter_res = LOFR_SKIP_TREE;
+ } else {
+ int been_omitted = filter_trees_update_omits(
+ obj, filter_data, include_it);
+ seen_info->depth = filter_data->current_depth;
+
+ if (include_it)
+ filter_res = LOFR_DO_SHOW;
+ else if (filter_data->omits && !been_omitted)
+ /*
+ * Must update omit information of children
+ * recursively; they have not been omitted yet.
+ */
+ filter_res = LOFR_ZERO;
+ else
+ filter_res = LOFR_SKIP_TREE;
+ }
+ filter_data->current_depth++;
+ return filter_res;
}
}
-static void* filter_trees_none__init(
+static void filter_trees_free(void *filter_data) {
+ struct filter_trees_depth_data *d = filter_data;
+ if (!d)
+ return;
+ oidmap_free(&d->seen_at_depth, 1);
+ free(d);
+}
+
+static void *filter_trees_depth__init(
struct oidset *omitted,
struct list_objects_filter_options *filter_options,
filter_object_fn *filter_fn,
filter_free_fn *filter_free_fn)
{
- struct filter_trees_none_data *d = xcalloc(1, sizeof(*d));
+ struct filter_trees_depth_data *d = xcalloc(1, sizeof(*d));
d->omits = omitted;
+ oidmap_init(&d->seen_at_depth, 0);
+ d->exclude_depth = filter_options->tree_exclude_depth;
+ d->current_depth = 0;
- *filter_fn = filter_trees_none;
- *filter_free_fn = free;
+ *filter_fn = filter_trees_depth;
+ *filter_free_fn = filter_trees_free;
return d;
}
@@ -430,7 +512,7 @@ static filter_init_fn s_filters[] = {
NULL,
filter_blobs_none__init,
filter_blobs_limit__init,
- filter_trees_none__init,
+ filter_trees_depth__init,
filter_sparse_oid__init,
filter_sparse_path__init,
};