X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=fsck-cache.c;h=6ac122b71cf9a5eec298a003032c5724d47f306d;hb=d1af002dc608be3213ba18df1a99ced0ab42e6d6;hp=a00702b79f7169ef3da7d60e9bbbe9ccf237e673;hpb=a4f35a2dc0f98f4cac906f9a748857f61bb3b84c;p=git.git

diff --git a/fsck-cache.c b/fsck-cache.c
index a00702b7..6ac122b7 100644
--- a/fsck-cache.c
+++ b/fsck-cache.c
@@ -6,15 +6,46 @@
 #include "tree.h"
 #include "blob.h"
 #include "tag.h"
+#include "delta.h"
 
 #define REACHABLE 0x0001
 
 static int show_root = 0;
 static int show_tags = 0;
 static int show_unreachable = 0;
+static int show_max_delta_depth = 0;
 static int keep_cache_objects = 0; 
 static unsigned char head_sha1[20];
 
+static void expand_deltas(void)
+{
+	int i, max_depth = 0;
+
+	/*
+	 * To be as efficient as possible we look for delta heads and
+	 * recursively process them going backward, and parsing
+	 * resulting objects along the way.  This allows for processing
+	 * each delta objects only once regardless of the delta depth.
+	 */
+	for (i = 0; i < nr_objs; i++) {
+		struct object *obj = objs[i];
+		if (obj->parsed && !obj->delta && obj->attached_deltas) {
+			int depth = 0;
+			char type[10];
+			unsigned long size;
+			void *buf = read_sha1_file(obj->sha1, type, &size);
+			if (!buf)
+				continue;
+			depth = process_deltas(buf, size, obj->type,
+					       obj->attached_deltas);
+			if (max_depth < depth)
+				max_depth = depth;
+		}
+	}
+	if (show_max_delta_depth)
+		printf("maximum delta depth = %d\n", max_depth);
+}
+															
 static void check_connectivity(void)
 {
 	int i;
@@ -25,7 +56,12 @@ static void check_connectivity(void)
 		struct object_list *refs;
 
 		if (!obj->parsed) {
-			printf("missing %s %s\n", obj->type, sha1_to_hex(obj->sha1));
+			if (obj->delta)
+				printf("unresolved delta %s\n",
+				       sha1_to_hex(obj->sha1));
+			else
+				printf("missing %s %s\n",
+				       obj->type, sha1_to_hex(obj->sha1));
 			continue;
 		}
 
@@ -43,7 +79,12 @@ static void check_connectivity(void)
 			continue;
 
 		if (show_unreachable && !(obj->flags & REACHABLE)) {
-			printf("unreachable %s %s\n", obj->type, sha1_to_hex(obj->sha1));
+			if (obj->attached_deltas)
+				printf("foreign delta reference %s\n", 
+				       sha1_to_hex(obj->sha1));
+			else
+				printf("unreachable %s %s\n",
+				       obj->type, sha1_to_hex(obj->sha1));
 			continue;
 		}
 
@@ -152,7 +193,7 @@ static int fsck_tree(struct tree *item)
 	}
 
 	if (has_full_path) {
-		fprintf(stderr, "warning: fsck-cache: tree %s "
+		fprintf(stderr, "warning: git-fsck-cache: tree %s "
 			"has full pathnames in it\n", 
 			sha1_to_hex(item->object.sha1));
 	}
@@ -201,6 +242,8 @@ static int fsck_sha1(unsigned char *sha1)
 		return fsck_commit((struct commit *) obj);
 	if (obj->type == tag_type)
 		return fsck_tag((struct tag *) obj);
+	if (!obj->type && obj->delta)
+		return 0;
 	return -1;
 }
 
@@ -296,6 +339,74 @@ static int fsck_dir(int i, char *path)
 	return 0;
 }
 
+static int read_sha1_reference(const char *path)
+{
+	char hexname[60];
+	unsigned char sha1[20];
+	int fd = open(path, O_RDONLY), len;
+	struct object *obj;
+
+	if (fd < 0)
+		return -1;
+
+	len = read(fd, hexname, sizeof(hexname));
+	close(fd);
+	if (len < 40)
+		return -1;
+
+	if (get_sha1_hex(hexname, sha1) < 0)
+		return -1;
+
+	obj = lookup_object(sha1);
+	if (!obj)
+		return error("%s: invalid sha1 pointer %.40s", path, hexname);
+
+	obj->used = 1;
+	mark_reachable(obj, REACHABLE);
+	return 0;
+}
+
+static void find_file_objects(const char *base, const char *name)
+{
+	int baselen = strlen(base);
+	int namelen = strlen(name);
+	char *path = xmalloc(baselen + namelen + 2);
+	struct stat st;
+
+	memcpy(path, base, baselen);
+	path[baselen] = '/';
+	memcpy(path + baselen + 1, name, namelen+1);
+	if (stat(path, &st) < 0)
+		return;
+
+	/*
+	 * Recurse into directories
+	 */
+	if (S_ISDIR(st.st_mode)) {
+		DIR *dir = opendir(path);
+		if (dir) {
+			struct dirent *de;
+			while ((de = readdir(dir)) != NULL) {
+				if (de->d_name[0] == '.')
+					continue;
+				find_file_objects(path, de->d_name);
+			}
+			closedir(dir);
+		}
+		return;
+	}
+	if (S_ISREG(st.st_mode)) {
+		read_sha1_reference(path);
+		return;
+	}
+}
+
+static void get_default_heads(void)
+{
+	char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
+	find_file_objects(git_dir, "refs");
+}
+
 int main(int argc, char **argv)
 {
 	int i, heads;
@@ -316,12 +427,16 @@ int main(int argc, char **argv)
 			show_root = 1;
 			continue;
 		}
+		if (!strcmp(arg, "--delta-depth")) {
+			show_max_delta_depth = 1;
+			continue;
+		}
 		if (!strcmp(arg, "--cache")) {
 			keep_cache_objects = 1;
 			continue;
 		}
 		if (*arg == '-')
-			usage("fsck-cache [--tags] [[--unreachable] [--cache] <head-sha1>*]");
+			usage("git-fsck-cache [--tags] [[--unreachable] [--cache] <head-sha1>*]");
 	}
 
 	sha1_dir = get_object_directory();
@@ -332,6 +447,8 @@ int main(int argc, char **argv)
 	}
 	fsck_sha1_list();
 
+	expand_deltas();
+
 	heads = 0;
 	for (i = 1; i < argc; i++) {
 		const char *arg = argv[i]; 
@@ -354,6 +471,16 @@ int main(int argc, char **argv)
 		error("expected sha1, got %s", arg);
 	}
 
+	/*
+	 * If we've not been given any explicit head information, do the
+	 * default ones from .git/refs. We also consider the index file
+	 * in this case (ie this implies --cache).
+	 */
+	if (!heads) {
+		get_default_heads();
+		keep_cache_objects = 1;
+	}
+
 	if (keep_cache_objects) {
 		int i;
 		read_cache();
@@ -368,15 +495,6 @@ int main(int argc, char **argv)
 		}
 	}
 
-	if (!heads && !keep_cache_objects) {
-		if (show_unreachable) {
-			fprintf(stderr, "unable to do reachability without a head nor --cache\n");
-			show_unreachable = 0; 
-		}
-		if (!heads)
-			fprintf(stderr, "expect dangling commits - potential heads - due to lack of head information\n");
-	}
-
 	check_connectivity();
 	return 0;
 }