1 files changed, 35 insertions, 16 deletions

diff --git a/shallow.c b/shallow.c
index 9f6ee35..e53067c 100644
--- a/shallow.c
+++ b/shallow.c
@@ -14,12 +14,13 @@
 #include "commit-slab.h"
 #include "revision.h"
 #include "list-objects.h"
+#include "commit-slab.h"
 #include "repository.h"
 
 void set_alternate_shallow_file(struct repository *r, const char *path, int override)
 {
 	if (r->parsed_objects->is_shallow != -1)
-		die("BUG: is_repository_shallow must not be called before set_alternate_shallow_file");
+		BUG("is_repository_shallow must not be called before set_alternate_shallow_file");
 	if (r->parsed_objects->alternate_shallow_file && !override)
 		return;
 	free(r->parsed_objects->alternate_shallow_file);
@@ -73,6 +74,11 @@ int is_repository_shallow(struct repository *r)
 	return r->parsed_objects->is_shallow;
 }
 
+/*
+ * TODO: use "int" elemtype instead of "int *" when/if commit-slab
+ * supports a "valid" flag.
+ */
+define_commit_slab(commit_depth, int *);
 struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
 		int shallow_flag, int not_shallow_flag)
 {
@@ -81,25 +87,29 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
 	struct object_array stack = OBJECT_ARRAY_INIT;
 	struct commit *commit = NULL;
 	struct commit_graft *graft;
+	struct commit_depth depths;
 
+	init_commit_depth(&depths);
 	while (commit || i < heads->nr || stack.nr) {
 		struct commit_list *p;
 		if (!commit) {
 			if (i < heads->nr) {
+				int **depth_slot;
 				commit = (struct commit *)
 					deref_tag(heads->objects[i++].item, NULL, 0);
 				if (!commit || commit->object.type != OBJ_COMMIT) {
 					commit = NULL;
 					continue;
 				}
-				if (!commit->util)
-					commit->util = xmalloc(sizeof(int));
-				*(int *)commit->util = 0;
+				depth_slot = commit_depth_at(&depths, commit);
+				if (!*depth_slot)
+					*depth_slot = xmalloc(sizeof(int));
+				**depth_slot = 0;
 				cur_depth = 0;
 			} else {
 				commit = (struct commit *)
 					object_array_pop(&stack);
-				cur_depth = *(int *)commit->util;
+				cur_depth = **commit_depth_at(&depths, commit);
 			}
 		}
 		parse_commit_or_die(commit);
@@ -115,25 +125,31 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
 		}
 		commit->object.flags |= not_shallow_flag;
 		for (p = commit->parents, commit = NULL; p; p = p->next) {
-			if (!p->item->util) {
-				int *pointer = xmalloc(sizeof(int));
-				p->item->util = pointer;
-				*pointer =  cur_depth;
+			int **depth_slot = commit_depth_at(&depths, p->item);
+			if (!*depth_slot) {
+				*depth_slot = xmalloc(sizeof(int));
+				**depth_slot = cur_depth;
 			} else {
-				int *pointer = p->item->util;
-				if (cur_depth >= *pointer)
+				if (cur_depth >= **depth_slot)
 					continue;
-				*pointer = cur_depth;
+				**depth_slot = cur_depth;
 			}
 			if (p->next)
 				add_object_array(&p->item->object,
 						NULL, &stack);
 			else {
 				commit = p->item;
-				cur_depth = *(int *)commit->util;
+				cur_depth = **commit_depth_at(&depths, commit);
 			}
 		}
 	}
+	for (i = 0; i < depths.slab_count; i++) {
+		int j;
+
+		for (j = 0; j < depths.slab_size; j++)
+			free(depths.slab[i][j]);
+	}
+	clear_commit_depth(&depths);
 
 	return result;
 }
@@ -174,6 +190,9 @@ struct commit_list *get_shallow_commits_by_rev_list(int ac, const char **av,
 		die("revision walk setup failed");
 	traverse_commit_list(&revs, show_commit, NULL, &not_shallow_list);
 
+	if (!not_shallow_list)
+		die("no commits selected for shallow requests");
+
 	/* Mark all reachable commits as NOT_SHALLOW */
 	for (p = not_shallow_list; p; p = p->next)
 		p->item->object.flags |= not_shallow_flag;
@@ -217,7 +236,7 @@ struct commit_list *get_shallow_commits_by_rev_list(int ac, const char **av,
 static void check_shallow_file_for_update(struct repository *r)
 {
 	if (r->parsed_objects->is_shallow == -1)
-		die("BUG: shallow must be initialized by now");
+		BUG("shallow must be initialized by now");
 
 	if (!stat_validity_check(r->parsed_objects->shallow_stat, git_path_shallow(the_repository)))
 		die("shallow file has changed since we read it");
@@ -353,7 +372,7 @@ void advertise_shallow_grafts(int fd)
  */
 void prune_shallow(int show_only)
 {
-	static struct lock_file shallow_lock;
+	struct lock_file shallow_lock = LOCK_INIT;
 	struct strbuf sb = STRBUF_INIT;
 	int fd;
 
@@ -448,7 +467,7 @@ static uint32_t *paint_alloc(struct paint_info *info)
 	void *p;
 	if (!info->pool_count || size > info->end - info->free) {
 		if (size > POOL_SIZE)
-			die("BUG: pool size too small for %d in paint_alloc()",
+			BUG("pool size too small for %d in paint_alloc()",
 			    size);
 		info->pool_count++;
 		REALLOC_ARRAY(info->pools, info->pool_count);