X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=fsck-cache.c;h=952d41387ac279bcc35fbe5e40fb7d3d917894ea;hb=7fa6b4e7692926d2d07adee1ef8e277157929058;hp=c35acaa82c93824f952327e12727d0c92edc5bd7;hpb=4e6616ab77ed6a53f857d4b1082c4dc4140f34f5;p=git.git

diff --git a/fsck-cache.c b/fsck-cache.c
index c35acaa8..952d4138 100644
--- a/fsck-cache.c
+++ b/fsck-cache.c
@@ -3,75 +3,68 @@
 #include <sys/types.h>
 #include <dirent.h>
 
-/*
- * These two functions should build up a graph in memory about
- * what objects we've referenced, and found, and types..
- *
- * Right now we don't do that kind of reachability checking. Yet.
- */
-static void mark_needs_sha1(unsigned char *parent, const char * type, unsigned char *child)
-{
-}
+#include "commit.h"
+#include "tree.h"
+#include "blob.h"
 
-static int mark_sha1_seen(unsigned char *sha1, char *tag)
-{
-	return 0;
-}
+#define REACHABLE 0x0001
 
-static int fsck_tree(unsigned char *sha1, void *data, unsigned long size)
+static int show_unreachable = 0;
+static unsigned char head_sha1[20];
+
+static void check_connectivity(void)
 {
-	int warn_old_tree = 1;
-
-	while (size) {
-		int len = 1+strlen(data);
-		unsigned char *file_sha1 = data + len;
-		char *path = strchr(data, ' ');
-		unsigned int mode;
-		if (size < len + 20 || !path || sscanf(data, "%o", &mode) != 1)
-			return -1;
+	int i;
 
-		/* Warn about trees that don't do the recursive thing.. */
-		if (warn_old_tree && strchr(path, '/')) {
-			fprintf(stderr, "warning: fsck-cache: tree %s has full pathnames in it\n", sha1_to_hex(sha1));
-			warn_old_tree = 0;
+	/* Look up all the requirements, warn about missing objects.. */
+	for (i = 0; i < nr_objs; i++) {
+		struct object *obj = objs[i];
+
+		if (show_unreachable && !(obj->flags & REACHABLE)) {
+			printf("unreachable %s %s\n", obj->type, sha1_to_hex(obj->sha1));
+			continue;
 		}
 
-		data += len + 20;
-		size -= len + 20;
-		mark_needs_sha1(sha1, S_ISDIR(mode) ? "tree" : "blob", file_sha1);
+		if (!obj->parsed) {
+			printf("missing %s %s\n", obj->type, 
+			       sha1_to_hex(obj->sha1));
+		}
+		if (!obj->used) {
+			printf("dangling %s %s\n", obj->type, 
+			       sha1_to_hex(obj->sha1));
+		}
+	}
+}
+
+static int fsck_tree(unsigned char *sha1, void *data, unsigned long size)
+{
+	struct tree *item = lookup_tree(sha1);
+	if (parse_tree(item))
+		return -1;
+	if (item->has_full_path) {
+		fprintf(stderr, "warning: fsck-cache: tree %s "
+			"has full pathnames in it\n", sha1_to_hex(sha1));
 	}
 	return 0;
 }
 
 static int fsck_commit(unsigned char *sha1, void *data, unsigned long size)
 {
-	int parents;
-	unsigned char tree_sha1[20];
-	unsigned char parent_sha1[20];
-
-	if (memcmp(data, "tree ", 5))
+	struct commit *commit = lookup_commit(sha1);
+	if (parse_commit(commit))
 		return -1;
-	if (get_sha1_hex(data + 5, tree_sha1) < 0)
+	if (!commit->tree)
 		return -1;
-	mark_needs_sha1(sha1, "tree", tree_sha1);
-	data += 5 + 40 + 1;	/* "tree " + <hex sha1> + '\n' */
-	parents = 0;
-	while (!memcmp(data, "parent ", 7)) {
-		if (get_sha1_hex(data + 7, parent_sha1) < 0)
-			return -1;
-		mark_needs_sha1(sha1, "commit", parent_sha1);
-		data += 7 + 40 + 1; 	/* "parent " + <hex sha1> + '\n' */
-		parents++;
-	}
-	if (!parents)
-		printf("root: %s\n", sha1_to_hex(sha1));
+	if (!commit->parents)
+		printf("root %s\n", sha1_to_hex(sha1));
 	return 0;
 }
 
-static int fsck_entry(unsigned char *sha1, char *tag, void *data, unsigned long size)
+static int fsck_entry(unsigned char *sha1, char *tag, void *data, 
+		      unsigned long size)
 {
 	if (!strcmp(tag, "blob")) {
-		/* Nothing to check */;
+		lookup_blob(sha1); /* Nothing to check; but notice it. */
 	} else if (!strcmp(tag, "tree")) {
 		if (fsck_tree(sha1, data, size) < 0)
 			return -1;
@@ -80,7 +73,7 @@ static int fsck_entry(unsigned char *sha1, char *tag, void *data, unsigned long
 			return -1;
 	} else
 		return -1;
-	return mark_sha1_seen(sha1, tag);
+	return 0;
 }
 
 static int fsck_name(char *hex)
@@ -94,7 +87,8 @@ static int fsck_name(char *hex)
 			unsigned long size;
 			void *buffer = NULL;
 			if (!check_sha1_signature(sha1, map, mapsize))
-				buffer = unpack_sha1_file(map, mapsize, type, &size);
+				buffer = unpack_sha1_file(map, mapsize, type,
+							  &size);
 			munmap(map, mapsize);
 			if (buffer && !fsck_entry(sha1, type, buffer, size))
 				return 0;
@@ -109,8 +103,7 @@ static int fsck_dir(int i, char *path)
 	struct dirent *de;
 
 	if (!dir) {
-		fprintf(stderr, "missing sha1 directory '%s'", path);
-		return -1;
+		return error("missing sha1 directory '%s'", path);
 	}
 
 	while ((de = readdir(dir)) != NULL) {
@@ -139,16 +132,40 @@ static int fsck_dir(int i, char *path)
 
 int main(int argc, char **argv)
 {
-	int i;
+	int i, heads;
 	char *sha1_dir;
 
-	if (argc != 1)
-		usage("fsck-cache");
 	sha1_dir = getenv(DB_ENVIRONMENT) ? : DEFAULT_DB_ENVIRONMENT;
 	for (i = 0; i < 256; i++) {
 		static char dir[4096];
 		sprintf(dir, "%s/%02x", sha1_dir, i);
 		fsck_dir(i, dir);
 	}
+
+	heads = 0;
+	for (i = 1; i < argc; i++) {
+		if (!strcmp(argv[i], "--unreachable")) {
+			show_unreachable = 1;
+			continue;
+		}
+		if (!get_sha1_hex(argv[i], head_sha1)) {
+			struct object *obj = &lookup_commit(head_sha1)->object;
+			obj->used = 1;
+			mark_reachable(obj, REACHABLE);
+			heads++;
+			continue;
+		}
+		error("fsck-cache [[--unreachable] <head-sha1>*]");
+	}
+
+	if (!heads) {
+		if (show_unreachable) {
+			fprintf(stderr, "unable to do reachability without a head\n");
+			show_unreachable = 0; 
+		}
+		fprintf(stderr, "expect dangling commits - potential heads - due to lack of head information\n");
+	}
+
+	check_connectivity();
 	return 0;
 }