Merge branch 'jt/subprocess-handshake' into maint
[gitweb.git] / builtin / fsck.c
index 1a5caccd0f5ee3fa56af06e8f536271f58312665..64542ac3dea48e3a92901319233aa3a1e0c4cb9a 100644 (file)
@@ -1,5 +1,6 @@
 #include "builtin.h"
 #include "cache.h"
+#include "config.h"
 #include "commit.h"
 #include "tree.h"
 #include "blob.h"
@@ -18,6 +19,8 @@
 #define REACHABLE 0x0001
 #define SEEN      0x0002
 #define HAS_OBJ   0x0004
+/* This flag is set if something points to this object. */
+#define USED      0x0008
 
 static int show_root;
 static int show_tags;
@@ -167,18 +170,7 @@ static void mark_object_reachable(struct object *obj)
 
 static int traverse_one_object(struct object *obj)
 {
-       int result;
-       struct tree *tree = NULL;
-
-       if (obj->type == OBJ_TREE) {
-               tree = (struct tree *)obj;
-               if (parse_tree(tree) < 0)
-                       return 1; /* error already displayed */
-       }
-       result = fsck_walk(obj, obj, &fsck_walk_options);
-       if (tree)
-               free_tree_buffer(tree);
-       return result;
+       return fsck_walk(obj, obj, &fsck_walk_options);
 }
 
 static int traverse_reachable(void)
@@ -205,7 +197,7 @@ static int mark_used(struct object *obj, int type, void *data, struct fsck_optio
 {
        if (!obj)
                return 1;
-       obj->used = 1;
+       obj->flags |= USED;
        return 0;
 }
 
@@ -254,7 +246,7 @@ static void check_unreachable_object(struct object *obj)
        }
 
        /*
-        * "!used" means that nothing at all points to it, including
+        * "!USED" means that nothing at all points to it, including
         * other unreachable objects. In other words, it's the "tip"
         * of some set of unreachable objects, usually a commit that
         * got dropped.
@@ -265,7 +257,7 @@ static void check_unreachable_object(struct object *obj)
         * deleted a branch by mistake, this is a prime candidate to
         * start looking at, for example.
         */
-       if (!obj->used) {
+       if (!(obj->flags & USED)) {
                if (show_dangling)
                        printf("dangling %s %s\n", printable_type(obj),
                               describe_object(obj));
@@ -280,8 +272,7 @@ static void check_unreachable_object(struct object *obj)
                                free(filename);
                                return;
                        }
-                       if (!(f = fopen(filename, "w")))
-                               die_errno("Could not open '%s'", filename);
+                       f = xfopen(filename, "w");
                        if (obj->type == OBJ_BLOB) {
                                if (stream_blob_to_fd(fileno(f), &obj->oid, NULL, 1))
                                        die_errno("Could not write '%s'", filename);
@@ -377,7 +368,7 @@ static int fsck_obj(struct object *obj)
        return 0;
 }
 
-static int fsck_obj_buffer(const unsigned char *sha1, enum object_type type,
+static int fsck_obj_buffer(const struct object_id *oid, enum object_type type,
                           unsigned long size, void *buffer, int *eaten)
 {
        /*
@@ -385,50 +376,51 @@ static int fsck_obj_buffer(const unsigned char *sha1, enum object_type type,
         * verify_packfile(), data_valid variable for details.
         */
        struct object *obj;
-       obj = parse_object_buffer(sha1, type, size, buffer, eaten);
+       obj = parse_object_buffer(oid, type, size, buffer, eaten);
        if (!obj) {
                errors_found |= ERROR_OBJECT;
-               return error("%s: object corrupt or missing", sha1_to_hex(sha1));
+               return error("%s: object corrupt or missing", oid_to_hex(oid));
        }
-       obj->flags = HAS_OBJ;
+       obj->flags &= ~(REACHABLE | SEEN);
+       obj->flags |= HAS_OBJ;
        return fsck_obj(obj);
 }
 
 static int default_refs;
 
-static void fsck_handle_reflog_sha1(const char *refname, unsigned char *sha1,
-       unsigned long timestamp)
+static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
+       timestamp_t timestamp)
 {
        struct object *obj;
 
-       if (!is_null_sha1(sha1)) {
-               obj = lookup_object(sha1);
+       if (!is_null_oid(oid)) {
+               obj = lookup_object(oid->hash);
                if (obj && (obj->flags & HAS_OBJ)) {
                        if (timestamp && name_objects)
                                add_decoration(fsck_walk_options.object_names,
                                        obj,
-                                       xstrfmt("%s@{%ld}", refname, timestamp));
-                       obj->used = 1;
+                                       xstrfmt("%s@{%"PRItime"}", refname, timestamp));
+                       obj->flags |= USED;
                        mark_object_reachable(obj);
                } else {
-                       error("%s: invalid reflog entry %s", refname, sha1_to_hex(sha1));
+                       error("%s: invalid reflog entry %s", refname, oid_to_hex(oid));
                        errors_found |= ERROR_REACHABLE;
                }
        }
 }
 
-static int fsck_handle_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
-               const char *email, unsigned long timestamp, int tz,
+static int fsck_handle_reflog_ent(struct object_id *ooid, struct object_id *noid,
+               const char *email, timestamp_t timestamp, int tz,
                const char *message, void *cb_data)
 {
        const char *refname = cb_data;
 
        if (verbose)
                fprintf(stderr, "Checking reflog %s->%s\n",
-                       sha1_to_hex(osha1), sha1_to_hex(nsha1));
+                       oid_to_hex(ooid), oid_to_hex(noid));
 
-       fsck_handle_reflog_sha1(refname, osha1, 0);
-       fsck_handle_reflog_sha1(refname, nsha1, timestamp);
+       fsck_handle_reflog_oid(refname, ooid, 0);
+       fsck_handle_reflog_oid(refname, noid, timestamp);
        return 0;
 }
 
@@ -444,7 +436,7 @@ static int fsck_handle_ref(const char *refname, const struct object_id *oid,
 {
        struct object *obj;
 
-       obj = parse_object(oid->hash);
+       obj = parse_object(oid);
        if (!obj) {
                error("%s: invalid sha1 pointer %s", refname, oid_to_hex(oid));
                errors_found |= ERROR_REACHABLE;
@@ -456,7 +448,7 @@ static int fsck_handle_ref(const char *refname, const struct object_id *oid,
                errors_found |= ERROR_REFS;
        }
        default_refs++;
-       obj->used = 1;
+       obj->flags |= USED;
        if (name_objects)
                add_decoration(fsck_walk_options.object_names,
                        obj, xstrdup(refname));
@@ -491,7 +483,7 @@ static void get_default_heads(void)
        }
 }
 
-static struct object *parse_loose_object(const unsigned char *sha1,
+static struct object *parse_loose_object(const struct object_id *oid,
                                         const char *path)
 {
        struct object *obj;
@@ -500,31 +492,32 @@ static struct object *parse_loose_object(const unsigned char *sha1,
        unsigned long size;
        int eaten;
 
-       if (read_loose_object(path, sha1, &type, &size, &contents) < 0)
+       if (read_loose_object(path, oid->hash, &type, &size, &contents) < 0)
                return NULL;
 
        if (!contents && type != OBJ_BLOB)
                die("BUG: read_loose_object streamed a non-blob");
 
-       obj = parse_object_buffer(sha1, type, size, contents, &eaten);
+       obj = parse_object_buffer(oid, type, size, contents, &eaten);
 
        if (!eaten)
                free(contents);
        return obj;
 }
 
-static int fsck_loose(const unsigned char *sha1, const char *path, void *data)
+static int fsck_loose(const struct object_id *oid, const char *path, void *data)
 {
-       struct object *obj = parse_loose_object(sha1, path);
+       struct object *obj = parse_loose_object(oid, path);
 
        if (!obj) {
                errors_found |= ERROR_OBJECT;
                error("%s: object corrupt or missing: %s",
-                     sha1_to_hex(sha1), path);
+                     oid_to_hex(oid), path);
                return 0; /* keep checking other objects */
        }
 
-       obj->flags = HAS_OBJ;
+       obj->flags &= ~(REACHABLE | SEEN);
+       obj->flags |= HAS_OBJ;
        if (fsck_obj(obj))
                errors_found |= ERROR_OBJECT;
        return 0;
@@ -537,7 +530,7 @@ static int fsck_cruft(const char *basename, const char *path, void *data)
        return 0;
 }
 
-static int fsck_subdir(int nr, const char *path, void *progress)
+static int fsck_subdir(unsigned int nr, const char *path, void *progress)
 {
        display_progress(progress, nr + 1);
        return 0;
@@ -599,14 +592,14 @@ static int fsck_cache_tree(struct cache_tree *it)
                fprintf(stderr, "Checking cache tree\n");
 
        if (0 <= it->entry_count) {
-               struct object *obj = parse_object(it->sha1);
+               struct object *obj = parse_object(&it->oid);
                if (!obj) {
                        error("%s: invalid sha1 pointer in cache-tree",
-                             sha1_to_hex(it->sha1));
+                             oid_to_hex(&it->oid));
                        errors_found |= ERROR_REFS;
                        return 1;
                }
-               obj->used = 1;
+               obj->flags |= USED;
                if (name_objects)
                        add_decoration(fsck_walk_options.object_names,
                                obj, xstrdup(":"));
@@ -619,26 +612,26 @@ static int fsck_cache_tree(struct cache_tree *it)
        return err;
 }
 
-static void mark_object_for_connectivity(const unsigned char *sha1)
+static void mark_object_for_connectivity(const struct object_id *oid)
 {
-       struct object *obj = lookup_unknown_object(sha1);
+       struct object *obj = lookup_unknown_object(oid->hash);
        obj->flags |= HAS_OBJ;
 }
 
-static int mark_loose_for_connectivity(const unsigned char *sha1,
+static int mark_loose_for_connectivity(const struct object_id *oid,
                                       const char *path,
                                       void *data)
 {
-       mark_object_for_connectivity(sha1);
+       mark_object_for_connectivity(oid);
        return 0;
 }
 
-static int mark_packed_for_connectivity(const unsigned char *sha1,
+static int mark_packed_for_connectivity(const struct object_id *oid,
                                        struct packed_git *pack,
                                        uint32_t pos,
                                        void *data)
 {
-       mark_object_for_connectivity(sha1);
+       mark_object_for_connectivity(oid);
        return 0;
 }
 
@@ -667,7 +660,7 @@ static struct option fsck_opts[] = {
 
 int cmd_fsck(int argc, const char **argv, const char *prefix)
 {
-       int i, heads;
+       int i;
        struct alternate_object_database *alt;
 
        errors_found = 0;
@@ -735,7 +728,6 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
                }
        }
 
-       heads = 0;
        for (i = 0; i < argc; i++) {
                const char *arg = argv[i];
                unsigned char sha1[20];
@@ -748,12 +740,11 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
                                continue;
                        }
 
-                       obj->used = 1;
+                       obj->flags |= USED;
                        if (name_objects)
                                add_decoration(fsck_walk_options.object_names,
                                        obj, xstrdup(arg));
                        mark_object_reachable(obj);
-                       heads++;
                        continue;
                }
                error("invalid parameter: expected sha1, got '%s'", arg);
@@ -771,6 +762,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
        }
 
        if (keep_cache_objects) {
+               verify_index_checksum = 1;
                read_cache();
                for (i = 0; i < active_nr; i++) {
                        unsigned int mode;
@@ -780,11 +772,11 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
                        mode = active_cache[i]->ce_mode;
                        if (S_ISGITLINK(mode))
                                continue;
-                       blob = lookup_blob(active_cache[i]->oid.hash);
+                       blob = lookup_blob(&active_cache[i]->oid);
                        if (!blob)
                                continue;
                        obj = &blob->object;
-                       obj->used = 1;
+                       obj->flags |= USED;
                        if (name_objects)
                                add_decoration(fsck_walk_options.object_names,
                                        obj,