diff options
Diffstat (limited to 'builtin-unpack-objects.c')
| -rw-r--r-- | builtin-unpack-objects.c | 110 |
1 files changed, 103 insertions, 7 deletions
diff --git a/builtin-unpack-objects.c b/builtin-unpack-objects.c index 50e07fa..9d2a854 100644 --- a/builtin-unpack-objects.c +++ b/builtin-unpack-objects.c @@ -7,11 +7,13 @@ #include "commit.h" #include "tag.h" #include "tree.h" +#include "tree-walk.h" #include "progress.h" #include "decorate.h" +#include "fsck.h" -static int dry_run, quiet, recover, has_errors; -static const char unpack_usage[] = "git-unpack-objects [-n] [-q] [-r] < pack-file"; +static int dry_run, quiet, recover, has_errors, strict; +static const char unpack_usage[] = "git-unpack-objects [-n] [-q] [-r] [--strict] < pack-file"; /* We always read in 4kB chunks. */ static unsigned char buffer[4096]; @@ -31,6 +33,16 @@ static struct obj_buffer *lookup_object_buffer(struct object *base) return lookup_decoration(&obj_decorate, base); } +static void add_object_buffer(struct object *object, char *buffer, unsigned long size) +{ + struct obj_buffer *obj; + obj = xcalloc(1, sizeof(struct obj_buffer)); + obj->buffer = buffer; + obj->size = size; + if (add_decoration(&obj_decorate, object, obj)) + die("object %s tried to add buffer twice!", sha1_to_hex(object->sha1)); +} + /* * Make sure at least "min" bytes are available in the buffer, and * return the pointer to the buffer. @@ -134,9 +146,58 @@ static void add_delta_to_list(unsigned nr, unsigned const char *base_sha1, struct obj_info { off_t offset; unsigned char sha1[20]; + struct object *obj; }; +#define FLAG_OPEN (1u<<20) +#define FLAG_WRITTEN (1u<<21) + static struct obj_info *obj_list; +unsigned nr_objects; + +static void write_cached_object(struct object *obj) +{ + unsigned char sha1[20]; + struct obj_buffer *obj_buf = lookup_object_buffer(obj); + if (write_sha1_file(obj_buf->buffer, obj_buf->size, typename(obj->type), sha1) < 0) + die("failed to write object %s", sha1_to_hex(obj->sha1)); + obj->flags |= FLAG_WRITTEN; +} + +static int check_object(struct object *obj, int type, void *data) +{ + if (!obj) + return 0; + + if (obj->flags & FLAG_WRITTEN) + return 1; + + if (type != OBJ_ANY && obj->type != type) + die("object type mismatch"); + + if (!(obj->flags & FLAG_OPEN)) { + unsigned long size; + int type = sha1_object_info(obj->sha1, &size); + if (type != obj->type || type <= 0) + die("object of unexpected type"); + obj->flags |= FLAG_WRITTEN; + return 1; + } + + if (fsck_object(obj, 1, fsck_error_function)) + die("Error in object"); + if (!fsck_walk(obj, check_object, 0)) + die("Error on reachable objects of %s", sha1_to_hex(obj->sha1)); + write_cached_object(obj); + return 1; +} + +static void write_rest(void) +{ + unsigned i; + for (i = 0; i < nr_objects; i++) + check_object(obj_list[i].obj, OBJ_ANY, 0); +} static void added_object(unsigned nr, enum object_type type, void *data, unsigned long size); @@ -144,9 +205,36 @@ static void added_object(unsigned nr, enum object_type type, static void write_object(unsigned nr, enum object_type type, void *buf, unsigned long size) { - if (write_sha1_file(buf, size, typename(type), obj_list[nr].sha1) < 0) - die("failed to write object"); added_object(nr, type, buf, size); + if (!strict) { + if (write_sha1_file(buf, size, typename(type), obj_list[nr].sha1) < 0) + die("failed to write object"); + free(buf); + obj_list[nr].obj = 0; + } else if (type == OBJ_BLOB) { + struct blob *blob; + if (write_sha1_file(buf, size, typename(type), obj_list[nr].sha1) < 0) + die("failed to write object"); + free(buf); + + blob = lookup_blob(obj_list[nr].sha1); + if (blob) + blob->object.flags |= FLAG_WRITTEN; + else + die("invalid blob object"); + obj_list[nr].obj = 0; + } else { + struct object *obj; + int eaten; + hash_sha1_file(buf, size, typename(type), obj_list[nr].sha1); + obj = parse_object_buffer(obj_list[nr].sha1, type, size, buf, &eaten); + if (!obj) + die("invalid %s", typename(type)); + /* buf is stored via add_object_buffer and in obj, if its a tree or commit */ + add_object_buffer(obj, buf, size); + obj->flags |= FLAG_OPEN; + obj_list[nr].obj = obj; + } } static void resolve_delta(unsigned nr, enum object_type type, @@ -163,7 +251,6 @@ static void resolve_delta(unsigned nr, enum object_type type, die("failed to apply delta"); free(delta); write_object(nr, type, result, result_size); - free(result); } static void added_object(unsigned nr, enum object_type type, @@ -193,7 +280,8 @@ static void unpack_non_delta_entry(enum object_type type, unsigned long size, if (!dry_run && buf) write_object(nr, type, buf, size); - free(buf); + else + free(buf); } static void unpack_delta_entry(enum object_type type, unsigned long delta_size, @@ -336,7 +424,8 @@ static void unpack_all(void) int i; struct progress *progress = NULL; struct pack_header *hdr = fill(sizeof(struct pack_header)); - unsigned nr_objects = ntohl(hdr->hdr_entries); + + nr_objects = ntohl(hdr->hdr_entries); if (ntohl(hdr->hdr_signature) != PACK_SIGNATURE) die("bad pack file"); @@ -347,6 +436,7 @@ static void unpack_all(void) if (!quiet) progress = start_progress("Unpacking objects", nr_objects); obj_list = xmalloc(nr_objects * sizeof(*obj_list)); + memset(obj_list, 0, nr_objects * sizeof(*obj_list)); for (i = 0; i < nr_objects; i++) { unpack_one(i); display_progress(progress, i + 1); @@ -382,6 +472,10 @@ int cmd_unpack_objects(int argc, const char **argv, const char *prefix) recover = 1; continue; } + if (!strcmp(arg, "--strict")) { + strict = 1; + continue; + } if (!prefixcmp(arg, "--pack_header=")) { struct pack_header *hdr; char *c; @@ -407,6 +501,8 @@ int cmd_unpack_objects(int argc, const char **argv, const char *prefix) unpack_all(); SHA1_Update(&ctx, buffer, offset); SHA1_Final(sha1, &ctx); + if (strict) + write_rest(); if (hashcmp(fill(20), sha1)) die("final sha1 did not match"); use(20); |