diff options
Diffstat (limited to 'index-pack.c')
| -rw-r--r-- | index-pack.c | 745 |
1 files changed, 423 insertions, 322 deletions
diff --git a/index-pack.c b/index-pack.c index 3c768fbc6..340074fc7 100644 --- a/index-pack.c +++ b/index-pack.c @@ -6,23 +6,33 @@ #include "commit.h" #include "tag.h" #include "tree.h" +#include "progress.h" +#include "fsck.h" +#include "exec_cmd.h" static const char index_pack_usage[] = -"git-index-pack [-v] [-o <index-file>] [{ ---keep | --keep=<msg> }] { <pack-file> | --stdin [--fix-thin] [<pack-file>] }"; +"git index-pack [-v] [-o <index-file>] [{ ---keep | --keep=<msg> }] [--strict] { <pack-file> | --stdin [--fix-thin] [<pack-file>] }"; struct object_entry { - unsigned long offset; + struct pack_idx_entry idx; unsigned long size; unsigned int hdr_size; enum object_type type; enum object_type real_type; - unsigned char sha1[20]; }; union delta_base { unsigned char sha1[20]; - unsigned long offset; + off_t offset; +}; + +struct base_data { + struct base_data *base; + struct base_data *child; + struct object_entry *obj; + void *data; + unsigned long size; }; /* @@ -31,6 +41,9 @@ union delta_base { */ #define UNION_BASE_SZ 20 +#define FLAG_LINK (1u<<20) +#define FLAG_CHECKED (1u<<21) + struct delta_entry { union delta_base base; @@ -39,53 +52,67 @@ struct delta_entry static struct object_entry *objects; static struct delta_entry *deltas; +static struct base_data *base_cache; +static size_t base_cache_used; static int nr_objects; static int nr_deltas; static int nr_resolved_deltas; static int from_stdin; +static int strict; static int verbose; -static volatile sig_atomic_t progress_update; +static struct progress *progress; + +/* We always read in 4kB chunks. */ +static unsigned char input_buffer[4096]; +static unsigned int input_offset, input_len; +static off_t consumed_bytes; +static git_SHA_CTX input_ctx; +static uint32_t input_crc32; +static int input_fd, output_fd, pack_fd; -static void progress_interval(int signum) +static int mark_link(struct object *obj, int type, void *data) { - progress_update = 1; + if (!obj) + return -1; + + if (type != OBJ_ANY && obj->type != type) + die("object type mismatch at %s", sha1_to_hex(obj->sha1)); + + obj->flags |= FLAG_LINK; + return 0; } -static void setup_progress_signal(void) +/* The content of each linked object must have been checked + or it must be already present in the object database */ +static void check_object(struct object *obj) { - struct sigaction sa; - struct itimerval v; - - memset(&sa, 0, sizeof(sa)); - sa.sa_handler = progress_interval; - sigemptyset(&sa.sa_mask); - sa.sa_flags = SA_RESTART; - sigaction(SIGALRM, &sa, NULL); + if (!obj) + return; - v.it_interval.tv_sec = 1; - v.it_interval.tv_usec = 0; - v.it_value = v.it_interval; - setitimer(ITIMER_REAL, &v, NULL); + if (!(obj->flags & FLAG_LINK)) + return; + if (!(obj->flags & FLAG_CHECKED)) { + 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_CHECKED; + return; + } } -static unsigned display_progress(unsigned n, unsigned total, unsigned last_pc) +static void check_objects(void) { - unsigned percent = n * 100 / total; - if (percent != last_pc || progress_update) { - fprintf(stderr, "%4u%% (%u/%u) done\r", percent, n, total); - progress_update = 0; - } - return percent; + unsigned i, max; + + max = get_max_object_index(); + for (i = 0; i < max; i++) + check_object(get_indexed_object(i)); } -/* We always read in 4kB chunks. */ -static unsigned char input_buffer[4096]; -static unsigned long input_offset, input_len, consumed_bytes; -static SHA_CTX input_ctx; -static int input_fd, output_fd, pack_fd; /* Discard current buffer used content. */ static void flush(void) @@ -93,7 +120,7 @@ static void flush(void) if (input_offset) { if (output_fd >= 0) write_or_die(output_fd, input_buffer, input_offset); - SHA1_Update(&input_ctx, input_buffer, input_offset); + git_SHA1_Update(&input_ctx, input_buffer, input_offset); memmove(input_buffer, input_buffer + input_offset, input_len); input_offset = 0; } @@ -111,14 +138,16 @@ static void *fill(int min) die("cannot fill %d bytes", min); flush(); do { - int ret = xread(input_fd, input_buffer + input_len, + ssize_t ret = xread(input_fd, input_buffer + input_len, sizeof(input_buffer) - input_len); if (ret <= 0) { if (!ret) die("early EOF"); - die("read error on input: %s", strerror(errno)); + die_errno("read error on input"); } input_len += ret; + if (from_stdin) + display_throughput(progress, consumed_bytes + input_len); } while (input_len < min); return input_buffer; } @@ -127,35 +156,38 @@ static void use(int bytes) { if (bytes > input_len) die("used more bytes than were available"); + input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes); input_len -= bytes; input_offset += bytes; + + /* make sure off_t is sufficiently large not to wrap */ + if (consumed_bytes > consumed_bytes + bytes) + die("pack too large for current definition of off_t"); consumed_bytes += bytes; } -static const char *open_pack_file(const char *pack_name) +static char *open_pack_file(char *pack_name) { if (from_stdin) { input_fd = 0; if (!pack_name) { static char tmpfile[PATH_MAX]; - snprintf(tmpfile, sizeof(tmpfile), - "%s/tmp_pack_XXXXXX", get_object_directory()); - output_fd = mkstemp(tmpfile); + output_fd = odb_mkstemp(tmpfile, sizeof(tmpfile), + "pack/tmp_pack_XXXXXX"); pack_name = xstrdup(tmpfile); } else output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600); if (output_fd < 0) - die("unable to create %s: %s\n", pack_name, strerror(errno)); + die_errno("unable to create '%s'", pack_name); pack_fd = output_fd; } else { input_fd = open(pack_name, O_RDONLY); if (input_fd < 0) - die("cannot open packfile '%s': %s", - pack_name, strerror(errno)); + die_errno("cannot open packfile '%s'", pack_name); output_fd = -1; pack_fd = input_fd; } - SHA1_Init(&input_ctx); + git_SHA1_Init(&input_ctx); return pack_name; } @@ -167,7 +199,8 @@ static void parse_pack_header(void) if (hdr->hdr_signature != htonl(PACK_SIGNATURE)) die("pack signature mismatch"); if (!pack_version_ok(hdr->hdr_version)) - die("pack version %d unsupported", ntohl(hdr->hdr_version)); + die("pack version %"PRIu32" unsupported", + ntohl(hdr->hdr_version)); nr_objects = ntohl(hdr->hdr_entries); use(sizeof(struct pack_header)); @@ -187,6 +220,50 @@ static void bad_object(unsigned long offset, const char *format, ...) die("pack has bad object at offset %lu: %s", offset, buf); } +static void free_base_data(struct base_data *c) +{ + if (c->data) { + free(c->data); + c->data = NULL; + base_cache_used -= c->size; + } +} + +static void prune_base_data(struct base_data *retain) +{ + struct base_data *b; + for (b = base_cache; + base_cache_used > delta_base_cache_limit && b; + b = b->child) { + if (b->data && b != retain) + free_base_data(b); + } +} + +static void link_base_data(struct base_data *base, struct base_data *c) +{ + if (base) + base->child = c; + else + base_cache = c; + + c->base = base; + c->child = NULL; + if (c->data) + base_cache_used += c->size; + prune_base_data(c); +} + +static void unlink_base_data(struct base_data *c) +{ + struct base_data *base = c->base; + if (base) + base->child = NULL; + else + base_cache = NULL; + free_base_data(c); +} + static void *unpack_entry_data(unsigned long offset, unsigned long size) { z_stream stream; @@ -197,10 +274,10 @@ static void *unpack_entry_data(unsigned long offset, unsigned long size) stream.avail_out = size; stream.next_in = fill(1); stream.avail_in = input_len; - inflateInit(&stream); + git_inflate_init(&stream); for (;;) { - int ret = inflate(&stream, 0); + int ret = git_inflate(&stream, 0); use(input_len - stream.avail_in); if (stream.total_out == size && ret == Z_STREAM_END) break; @@ -209,17 +286,20 @@ static void *unpack_entry_data(unsigned long offset, unsigned long size) stream.next_in = fill(1); stream.avail_in = input_len; } - inflateEnd(&stream); + git_inflate_end(&stream); return buf; } static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_base) { - unsigned char *p, c; - unsigned long size, base_offset; + unsigned char *p; + unsigned long size, c; + off_t base_offset; unsigned shift; + void *data; - obj->offset = consumed_bytes; + obj->idx.offset = consumed_bytes; + input_crc32 = crc32(0, Z_NULL, 0); p = fill(1); c = *p; @@ -231,7 +311,7 @@ static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_ p = fill(1); c = *p; use(1); - size += (c & 0x7fUL) << shift; + size += (c & 0x7f) << shift; shift += 7; } obj->size = size; @@ -249,16 +329,16 @@ static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_ base_offset = c & 127; while (c & 128) { base_offset += 1; - if (!base_offset || base_offset & ~(~0UL >> 7)) - bad_object(obj->offset, "offset value overflow for delta base object"); + if (!base_offset || MSB(base_offset, 7)) + bad_object(obj->idx.offset, "offset value overflow for delta base object"); p = fill(1); c = *p; use(1); base_offset = (base_offset << 7) + (c & 127); } - delta_base->offset = obj->offset - base_offset; - if (delta_base->offset >= obj->offset) - bad_object(obj->offset, "delta base offset is out of bound"); + delta_base->offset = obj->idx.offset - base_offset; + if (delta_base->offset <= 0 || delta_base->offset >= obj->idx.offset) + bad_object(obj->idx.offset, "delta base offset is out of bound"); break; case OBJ_COMMIT: case OBJ_TREE: @@ -266,17 +346,19 @@ static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_ case OBJ_TAG: break; default: - bad_object(obj->offset, "unknown object type %d", obj->type); + bad_object(obj->idx.offset, "unknown object type %d", obj->type); } - obj->hdr_size = consumed_bytes - obj->offset; + obj->hdr_size = consumed_bytes - obj->idx.offset; - return unpack_entry_data(obj->offset, obj->size); + data = unpack_entry_data(obj->idx.offset, obj->size); + obj->idx.crc32 = input_crc32; + return data; } static void *get_data_from_pack(struct object_entry *obj) { - unsigned long from = obj[0].offset + obj[0].hdr_size; - unsigned long len = obj[1].offset - from; + off_t from = obj[0].idx.offset + obj[0].hdr_size; + unsigned long len = obj[1].idx.offset - from; unsigned long rdy = 0; unsigned char *src, *data; z_stream stream; @@ -286,8 +368,11 @@ static void *get_data_from_pack(struct object_entry *obj) data = src; do { ssize_t n = pread(pack_fd, data + rdy, len - rdy, from + rdy); - if (n <= 0) - die("cannot pread pack file: %s", strerror(errno)); + if (n < 0) + die_errno("cannot pread pack file"); + if (!n) + die("premature end of pack file, %lu bytes missing", + len - rdy); rdy += n; } while (rdy < len); data = xmalloc(obj->size); @@ -296,9 +381,9 @@ static void *get_data_from_pack(struct object_entry *obj) stream.avail_out = obj->size; stream.next_in = src; stream.avail_in = len; - inflateInit(&stream); - while ((st = inflate(&stream, Z_FINISH)) == Z_OK); - inflateEnd(&stream); + git_inflate_init(&stream); + while ((st = git_inflate(&stream, Z_FINISH)) == Z_OK); + git_inflate_end(&stream); if (st != Z_STREAM_END || stream.total_out != obj->size) die("serious inflate inconsistency"); free(src); @@ -326,22 +411,24 @@ static int find_delta(const union delta_base *base) return -first-1; } -static int find_delta_children(const union delta_base *base, - int *first_index, int *last_index) +static void find_delta_children(const union delta_base *base, + int *first_index, int *last_index) { int first = find_delta(base); int last = first; int end = nr_deltas - 1; - if (first < 0) - return -1; + if (first < 0) { + *first_index = 0; + *last_index = -1; + return; + } while (first > 0 && !memcmp(&deltas[first - 1].base, base, UNION_BASE_SZ)) --first; while (last < end && !memcmp(&deltas[last + 1].base, base, UNION_BASE_SZ)) ++last; *first_index = first; *last_index = last; - return 0; } static void sha1_object(const void *data, unsigned long size, @@ -360,49 +447,138 @@ static void sha1_object(const void *data, unsigned long size, die("SHA1 COLLISION FOUND WITH %s !", sha1_to_hex(sha1)); free(has_data); } + if (strict) { + if (type == OBJ_BLOB) { + struct blob *blob = lookup_blob(sha1); + if (blob) + blob->object.flags |= FLAG_CHECKED; + else + die("invalid blob object %s", sha1_to_hex(sha1)); + } else { + struct object *obj; + int eaten; + void *buf = (void *) data; + + /* + * we do not need to free the memory here, as the + * buf is deleted by the caller. + */ + obj = parse_object_buffer(sha1, type, size, buf, &eaten); + if (!obj) + die("invalid %s", typename(type)); + if (fsck_object(obj, 1, fsck_error_function)) + die("Error in object"); + if (fsck_walk(obj, mark_link, NULL)) + die("Not all child objects of %s are reachable", sha1_to_hex(obj->sha1)); + + if (obj->type == OBJ_TREE) { + struct tree *item = (struct tree *) obj; + item->buffer = NULL; + } + if (obj->type == OBJ_COMMIT) { + struct commit *commit = (struct commit *) obj; + commit->buffer = NULL; + } + obj->flags |= FLAG_CHECKED; + } + } } -static void resolve_delta(struct object_entry *delta_obj, void *base_data, - unsigned long base_size, enum object_type type) +static void *get_base_data(struct base_data *c) { - void *delta_data; - unsigned long delta_size; - void *result; - unsigned long result_size; - union delta_base delta_base; - int j, first, last; + if (!c->data) { + struct object_entry *obj = c->obj; - delta_obj->real_type = type; + if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA) { + void *base = get_base_data(c->base); + void *raw = get_data_from_pack(obj); + c->data = patch_delta( + base, c->base->size, + raw, obj->size, + &c->size); + free(raw); + if (!c->data) + bad_object(obj->idx.offset, "failed to apply delta"); + } else { + c->data = get_data_from_pack(obj); + c->size = obj->size; + } + + base_cache_used += c->size; + prune_base_data(c); + } + return c->data; +} + +static void resolve_delta(struct object_entry *delta_obj, + struct base_data *base, struct base_data *result) +{ + void *base_data, *delta_data; + + delta_obj->real_type = base->obj->real_type; delta_data = get_data_from_pack(delta_obj); - delta_size = delta_obj->size; - result = patch_delta(base_data, base_size, delta_data, delta_size, - &result_size); + base_data = get_base_data(base); + result->obj = delta_obj; + result->data = patch_delta(base_data, base->size, + delta_data, delta_obj->size, &result->size); free(delta_data); - if (!result) - bad_object(delta_obj->offset, "failed to apply delta"); - sha1_object(result, result_size, type, delta_obj->sha1); + if (!result->data) + bad_object(delta_obj->idx.offset, "failed to apply delta"); + sha1_object(result->data, result->size, delta_obj->real_type, + delta_obj->idx.sha1); nr_resolved_deltas++; +} + +static void find_unresolved_deltas(struct base_data *base, + struct base_data *prev_base) +{ + int i, ref_first, ref_last, ofs_first, ofs_last; + + /* + * This is a recursive function. Those brackets should help reducing + * stack usage by limiting the scope of the delta_base union. + */ + { + union delta_base base_spec; + + hashcpy(base_spec.sha1, base->obj->idx.sha1); + find_delta_children(&base_spec, &ref_first, &ref_last); + + memset(&base_spec, 0, sizeof(base_spec)); + base_spec.offset = base->obj->idx.offset; + find_delta_children(&base_spec, &ofs_first, &ofs_last); + } + + if (ref_last == -1 && ofs_last == -1) { + free(base->data); + return; + } + + link_base_data(prev_base, base); - hashcpy(delta_base.sha1, delta_obj->sha1); - if (!find_delta_children(&delta_base, &first, &last)) { - for (j = first; j <= last; j++) { - struct object_entry *child = objects + deltas[j].obj_no; - if (child->real_type == OBJ_REF_DELTA) - resolve_delta(child, result, result_size, type); + for (i = ref_first; i <= ref_last; i++) { + struct object_entry *child = objects + deltas[i].obj_no; + if (child->real_type == OBJ_REF_DELTA) { + struct base_data result; + resolve_delta(child, base, &result); + if (i == ref_last && ofs_last == -1) + free_base_data(base); + find_unresolved_deltas(&result, base); } } - memset(&delta_base, 0, sizeof(delta_base)); - delta_base.offset = delta_obj->offset; - if (!find_delta_children(&delta_base, &first, &last)) { - for (j = first; j <= last; j++) { - struct object_entry *child = objects + deltas[j].obj_no; - if (child->real_type == OBJ_OFS_DELTA) - resolve_delta(child, result, result_size, type); + for (i = ofs_first; i <= ofs_last; i++) { + struct object_entry *child = objects + deltas[i].obj_no; + if (child->real_type == OBJ_OFS_DELTA) { + struct base_data result; + resolve_delta(child, base, &result); + if (i == ofs_last) + free_base_data(base); + find_unresolved_deltas(&result, base); } } - free(result); + unlink_base_data(base); } static int compare_delta_entry(const void *a, const void *b) @@ -415,9 +591,8 @@ static int compare_delta_entry(const void *a, const void *b) /* Parse all objects and return the pack content SHA1 hash */ static void parse_pack_objects(unsigned char *sha1) { - int i, percent = -1; + int i; struct delta_entry *delta = deltas; - void *data; struct stat st; /* @@ -427,35 +602,35 @@ static void parse_pack_objects(unsigned char *sha1) * - remember base (SHA1 or offset) for all deltas. */ if (verbose) - fprintf(stderr, "Indexing %d objects.\n", nr_objects); + progress = start_progress( + from_stdin ? "Receiving objects" : "Indexing objects", + nr_objects); for (i = 0; i < nr_objects; i++) { struct object_entry *obj = &objects[i]; - data = unpack_raw_entry(obj, &delta->base); + void *data = unpack_raw_entry(obj, &delta->base); obj->real_type = obj->type; if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA) { nr_deltas++; delta->obj_no = i; delta++; } else - sha1_object(data, obj->size, obj->type, obj->sha1); + sha1_object(data, obj->size, obj->type, obj->idx.sha1); free(data); - if (verbose) - percent = display_progress(i+1, nr_objects, percent); + display_progress(progress, i+1); } - objects[i].offset = consumed_bytes; - if (verbose) - fputc('\n', stderr); + objects[i].idx.offset = consumed_bytes; + stop_progress(&progress); /* Check pack integrity */ flush(); - SHA1_Final(sha1, &input_ctx); + git_SHA1_Final(sha1, &input_ctx); if (hashcmp(fill(20), sha1)) die("pack is corrupted (SHA1 mismatch)"); use(20); /* If input_fd is a file, we should have reached its end now. */ if (fstat(input_fd, &st)) - die("cannot fstat packfile: %s", strerror(errno)); + die_errno("cannot fstat packfile"); if (S_ISREG(st.st_mode) && lseek(input_fd, 0, SEEK_CUR) - input_len != st.st_size) die("pack has junk at the end"); @@ -476,46 +651,21 @@ static void parse_pack_objects(unsigned char *sha1) * for some more deltas. */ if (verbose) - fprintf(stderr, "Resolving %d deltas.\n", nr_deltas); + progress = start_progress("Resolving deltas", nr_deltas); for (i = 0; i < nr_objects; i++) { struct object_entry *obj = &objects[i]; - union delta_base base; - int j, ref, ref_first, ref_last, ofs, ofs_first, ofs_last; + struct base_data base_obj; if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA) continue; - hashcpy(base.sha1, obj->sha1); - ref = !find_delta_children(&base, &ref_first, &ref_last); - memset(&base, 0, sizeof(base)); - base.offset = obj->offset; - ofs = !find_delta_children(&base, &ofs_first, &ofs_last); - if (!ref && !ofs) - continue; - data = get_data_from_pack(obj); - if (ref) - for (j = ref_first; j <= ref_last; j++) { - struct object_entry *child = objects + deltas[j].obj_no; - if (child->real_type == OBJ_REF_DELTA) - resolve_delta(child, data, - obj->size, obj->type); - } - if (ofs) - for (j = ofs_first; j <= ofs_last; j++) { - struct object_entry *child = objects + deltas[j].obj_no; - if (child->real_type == OBJ_OFS_DELTA) - resolve_delta(child, data, - obj->size, obj->type); - } - free(data); - if (verbose) - percent = display_progress(nr_resolved_deltas, - nr_deltas, percent); + base_obj.obj = obj; + base_obj.data = NULL; + find_unresolved_deltas(&base_obj, NULL); + display_progress(progress, nr_resolved_deltas); } - if (verbose && nr_resolved_deltas == nr_deltas) - fputc('\n', stderr); } -static int write_compressed(int fd, void *in, unsigned int size) +static int write_compressed(struct sha1file *f, void *in, unsigned int size) { z_stream stream; unsigned long maxsize; @@ -535,12 +685,13 @@ static int write_compressed(int fd, void *in, unsigned int size) deflateEnd(&stream); size = stream.total_out; - write_or_die(fd, out, size); + sha1write(f, out, size); free(out); return size; } -static void append_obj_to_pack(const unsigned char *sha1, void *buf, +static struct object_entry *append_obj_to_pack(struct sha1file *f, + const unsigned char *sha1, void *buf, unsigned long size, enum object_type type) { struct object_entry *obj = &objects[nr_objects++]; @@ -555,10 +706,18 @@ static void append_obj_to_pack(const unsigned char *sha1, void *buf, s >>= 7; } header[n++] = c; - write_or_die(output_fd, header, n); - obj[1].offset = obj[0].offset + n; - obj[1].offset += write_compressed(output_fd, buf, size); - hashcpy(obj->sha1, sha1); + crc32_begin(f); + sha1write(f, header, n); + obj[0].size = size; + obj[0].hdr_size = n; + obj[0].type = type; + obj[0].real_type = type; + obj[1].idx.offset = obj[0].idx.offset + n; + obj[1].idx.offset += write_compressed(f, buf, size); + obj[0].idx.crc32 = crc32_end(f); + sha1flush(f); + hashcpy(obj->idx.sha1, sha1); + return obj; } static int delta_pos_compare(const void *_a, const void *_b) @@ -568,10 +727,10 @@ static int delta_pos_compare(const void *_a, const void *_b) return a->obj_no - b->obj_no; } -static void fix_unresolved_deltas(int nr_unresolved) +static void fix_unresolved_deltas(struct sha1file *f, int nr_unresolved) { struct delta_entry **sorted_by_pos; - int i, n = 0, percent = -1; + int i, n = 0; /* * Since many unresolved deltas may well be themselves base objects @@ -593,154 +752,24 @@ static void fix_unresolved_deltas(int nr_unresolved) for (i = 0; i < n; i++) { struct delta_entry *d = sorted_by_pos[i]; - void *data; - unsigned long size; enum object_type type; - int j, first, last; + struct base_data base_obj; if (objects[d->obj_no].real_type != OBJ_REF_DELTA) continue; - data = read_sha1_file(d->base.sha1, &type, &size); - if (!data) + base_obj.data = read_sha1_file(d->base.sha1, &type, &base_obj.size); + if (!base_obj.data) continue; - find_delta_children(&d->base, &first, &last); - for (j = first; j <= last; j++) { - struct object_entry *child = objects + deltas[j].obj_no; - if (child->real_type == OBJ_REF_DELTA) - resolve_delta(child, data, size, type); - } - - if (check_sha1_signature(d->base.sha1, data, size, typename(type))) + if (check_sha1_signature(d->base.sha1, base_obj.data, + base_obj.size, typename(type))) die("local object %s is corrupt", sha1_to_hex(d->base.sha1)); - append_obj_to_pack(d->base.sha1, data, size, type); - free(data); - if (verbose) - percent = display_progress(nr_resolved_deltas, - nr_deltas, percent); + base_obj.obj = append_obj_to_pack(f, d->base.sha1, + base_obj.data, base_obj.size, type); + find_unresolved_deltas(&base_obj, NULL); + display_progress(progress, nr_resolved_deltas); } free(sorted_by_pos); - if (verbose) - fputc('\n', stderr); -} - -static void readjust_pack_header_and_sha1(unsigned char *sha1) -{ - struct pack_header hdr; - SHA_CTX ctx; - int size; - - /* Rewrite pack header with updated object number */ - if (lseek(output_fd, 0, SEEK_SET) != 0) - die("cannot seek back: %s", strerror(errno)); - if (read_in_full(output_fd, &hdr, sizeof(hdr)) != sizeof(hdr)) - die("cannot read pack header back: %s", strerror(errno)); - hdr.hdr_entries = htonl(nr_objects); - if (lseek(output_fd, 0, SEEK_SET) != 0) - die("cannot seek back: %s", strerror(errno)); - write_or_die(output_fd, &hdr, sizeof(hdr)); - if (lseek(output_fd, 0, SEEK_SET) != 0) - die("cannot seek back: %s", strerror(errno)); - - /* Recompute and store the new pack's SHA1 */ - SHA1_Init(&ctx); - do { - unsigned char *buf[4096]; - size = xread(output_fd, buf, sizeof(buf)); - if (size < 0) - die("cannot read pack data back: %s", strerror(errno)); - SHA1_Update(&ctx, buf, size); - } while (size > 0); - SHA1_Final(sha1, &ctx); - write_or_die(output_fd, sha1, 20); -} - -static int sha1_compare(const void *_a, const void *_b) -{ - struct object_entry *a = *(struct object_entry **)_a; - struct object_entry *b = *(struct object_entry **)_b; - return hashcmp(a->sha1, b->sha1); -} - -/* - * On entry *sha1 contains the pack content SHA1 hash, on exit it is - * the SHA1 hash of sorted object names. - */ -static const char *write_index_file(const char *index_name, unsigned char *sha1) -{ - struct sha1file *f; - struct object_entry **sorted_by_sha, **list, **last; - unsigned int array[256]; - int i, fd; - SHA_CTX ctx; - - if (nr_objects) { - sorted_by_sha = - xcalloc(nr_objects, sizeof(struct object_entry *)); - list = sorted_by_sha; - last = sorted_by_sha + nr_objects; - for (i = 0; i < nr_objects; ++i) - sorted_by_sha[i] = &objects[i]; - qsort(sorted_by_sha, nr_objects, sizeof(sorted_by_sha[0]), - sha1_compare); - - } - else - sorted_by_sha = list = last = NULL; - - if (!index_name) { - static char tmpfile[PATH_MAX]; - snprintf(tmpfile, sizeof(tmpfile), - "%s/tmp_idx_XXXXXX", get_object_directory()); - fd = mkstemp(tmpfile); - index_name = xstrdup(tmpfile); - } else { - unlink(index_name); - fd = open(index_name, O_CREAT|O_EXCL|O_WRONLY, 0600); - } - if (fd < 0) - die("unable to create %s: %s", index_name, strerror(errno)); - f = sha1fd(fd, index_name); - - /* - * Write the first-level table (the list is sorted, - * but we use a 256-entry lookup to be able to avoid - * having to do eight extra binary search iterations). - */ - for (i = 0; i < 256; i++) { - struct object_entry **next = list; - while (next < last) { - struct object_entry *obj = *next; - if (obj->sha1[0] != i) - break; - next++; - } - array[i] = htonl(next - sorted_by_sha); - list = next; - } - sha1write(f, array, 256 * sizeof(int)); - - /* recompute the SHA1 hash of sorted object names. - * currently pack-objects does not do this, but that - * can be fixed. - */ - SHA1_Init(&ctx); - /* - * Write the actual SHA1 entries.. - */ - list = sorted_by_sha; - for (i = 0; i < nr_objects; i++) { - struct object_entry *obj = *list++; - unsigned int offset = htonl(obj->offset); - sha1write(f, &offset, 4); - sha1write(f, obj->sha1, 20); - SHA1_Update(&ctx, obj->sha1, 20); - } - sha1write(f, sha1, 20); - sha1close(f, NULL, 1); - free(sorted_by_sha); - SHA1_Final(sha1, &ctx); - return index_name; } static void final(const char *final_pack_name, const char *curr_pack_name, @@ -755,29 +784,32 @@ static void final(const char *final_pack_name, const char *curr_pack_name, if (!from_stdin) { close(input_fd); } else { + fsync_or_die(output_fd, curr_pack_name); err = close(output_fd); if (err) - die("error while closing pack file: %s", strerror(errno)); - chmod(curr_pack_name, 0444); + die_errno("error while closing pack file"); } if (keep_msg) { int keep_fd, keep_msg_len = strlen(keep_msg); - if (!keep_name) { - snprintf(name, sizeof(name), "%s/pack/pack-%s.keep", - get_object_directory(), sha1_to_hex(sha1)); - keep_name = name; - } - keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600); + + if (!keep_name) + keep_fd = odb_pack_keep(name, sizeof(name), sha1); + else + keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600); + if (keep_fd < 0) { if (errno != EEXIST) - die("cannot write keep file"); + die_errno("cannot write keep file '%s'", + keep_name); } else { if (keep_msg_len > 0) { write_or_die(keep_fd, keep_msg, keep_msg_len); write_or_die(keep_fd, "\n", 1); } - close(keep_fd); + if (close(keep_fd) != 0) + die_errno("cannot close written keep file '%s'", + keep_name); report = "keep"; } } @@ -790,9 +822,9 @@ static void final(const char *final_pack_name, const char *curr_pack_name, } if (move_temp_to_file(curr_pack_name, final_pack_name)) die("cannot store pack file"); - } + } else if (from_stdin) + chmod(final_pack_name, 0444); - chmod(curr_index_name, 0444); if (final_index_name != curr_index_name) { if (!final_index_name) { snprintf(name, sizeof(name), "%s/pack/pack-%s.idx", @@ -801,7 +833,8 @@ static void final(const char *final_pack_name, const char *curr_pack_name, } if (move_temp_to_file(curr_index_name, final_index_name)) die("cannot store index file"); - } + } else + chmod(final_index_name, 0444); if (!from_stdin) { printf("%s\n", sha1_to_hex(sha1)); @@ -825,23 +858,60 @@ static void final(const char *final_pack_name, const char *curr_pack_name, } } +static int git_index_pack_config(const char *k, const char *v, void *cb) +{ + if (!strcmp(k, "pack.indexversion")) { + pack_idx_default_version = git_config_int(k, v); + if (pack_idx_default_version > 2) + die("bad pack.indexversion=%"PRIu32, + pack_idx_default_version); + return 0; + } + return git_default_config(k, v, cb); +} + int main(int argc, char **argv) { int i, fix_thin_pack = 0; - const char *curr_pack, *pack_name = NULL; - const char *curr_index, *index_name = NULL; + char *curr_pack, *pack_name = NULL; + char *curr_index, *index_name = NULL; const char *keep_name = NULL, *keep_msg = NULL; char *index_name_buf = NULL, *keep_name_buf = NULL; - unsigned char sha1[20]; + struct pack_idx_entry **idx_objects; + unsigned char pack_sha1[20]; + + git_extract_argv0_path(argv[0]); + + /* + * We wish to read the repository's config file if any, and + * for that it is necessary to call setup_git_directory_gently(). + * However if the cwd was inside .git/objects/pack/ then we need + * to go back there or all the pack name arguments will be wrong. + * And in that case we cannot rely on any prefix returned by + * setup_git_directory_gently() either. + */ + { + char cwd[PATH_MAX+1]; + int nongit; + + if (!getcwd(cwd, sizeof(cwd)-1)) + die("Unable to get current working directory"); + setup_git_directory_gently(&nongit); + git_config(git_index_pack_config, NULL); + if (chdir(cwd)) + die("Cannot come back to cwd"); + } for (i = 1; i < argc; i++) { - const char *arg = argv[i]; + char *arg = argv[i]; if (*arg == '-') { if (!strcmp(arg, "--stdin")) { from_stdin = 1; } else if (!strcmp(arg, "--fix-thin")) { fix_thin_pack = 1; + } else if (!strcmp(arg, "--strict")) { + strict = 1; } else if (!strcmp(arg, "--keep")) { keep_msg = ""; } else if (!prefixcmp(arg, "--keep=")) { @@ -865,6 +935,15 @@ int main(int argc, char **argv) if (index_name || (i+1) >= argc) usage(index_pack_usage); index_name = argv[++i]; + } else if (!prefixcmp(arg, "--index-version=")) { + char *c; + pack_idx_default_version = strtoul(arg + 16, &c, 10); + if (pack_idx_default_version > 2) + die("bad %s", arg); + if (*c == ',') + pack_idx_off32_limit = strtoul(c+1, &c, 0); + if (*c || pack_idx_off32_limit & 0x80000000) + die("bad %s", arg); } else usage(index_pack_usage); continue; @@ -904,11 +983,16 @@ int main(int argc, char **argv) parse_pack_header(); objects = xmalloc((nr_objects + 1) * sizeof(struct object_entry)); deltas = xmalloc(nr_objects * sizeof(struct delta_entry)); - if (verbose) - setup_progress_signal(); - parse_pack_objects(sha1); - if (nr_deltas != nr_resolved_deltas) { + parse_pack_objects(pack_sha1); + if (nr_deltas == nr_resolved_deltas) { + stop_progress(&progress); + /* Flush remaining pack final 20-byte SHA1. */ + flush(); + } else { if (fix_thin_pack) { + struct sha1file *f; + unsigned char read_sha1[20], tail_sha1[20]; + char msg[48]; int nr_unresolved = nr_deltas - nr_resolved_deltas; int nr_objects_initial = nr_objects; if (nr_unresolved <= 0) @@ -916,28 +1000,45 @@ int main(int argc, char **argv) objects = xrealloc(objects, (nr_objects + nr_unresolved + 1) * sizeof(*objects)); - fix_unresolved_deltas(nr_unresolved); - if (verbose) - fprintf(stderr, "%d objects were added to complete this thin pack.\n", - nr_objects - nr_objects_initial); - readjust_pack_header_and_sha1(sha1); + f = sha1fd(output_fd, curr_pack); + fix_unresolved_deltas(f, nr_unresolved); + sprintf(msg, "completed with %d local objects", + nr_objects - nr_objects_initial); + stop_progress_msg(&progress, msg); + sha1close(f, tail_sha1, 0); + hashcpy(read_sha1, pack_sha1); + fixup_pack_header_footer(output_fd, pack_sha1, + curr_pack, nr_objects, + read_sha1, consumed_bytes-20); + if (hashcmp(read_sha1, tail_sha1) != 0) + die("Unexpected tail checksum for %s " + "(disk corruption?)", curr_pack); } if (nr_deltas != nr_resolved_deltas) die("pack has %d unresolved deltas", nr_deltas - nr_resolved_deltas); - } else { - /* Flush remaining pack final 20-byte SHA1. */ - flush(); } free(deltas); - curr_index = write_index_file(index_name, sha1); + if (strict) + check_objects(); + + idx_objects = xmalloc((nr_objects) * sizeof(struct pack_idx_entry *)); + for (i = 0; i < nr_objects; i++) + idx_objects[i] = &objects[i].idx; + curr_index = write_idx_file(index_name, idx_objects, nr_objects, pack_sha1); + free(idx_objects); + final(pack_name, curr_pack, index_name, curr_index, keep_name, keep_msg, - sha1); + pack_sha1); free(objects); free(index_name_buf); free(keep_name_buf); + if (pack_name == NULL) + free(curr_pack); + if (index_name == NULL) + free(curr_index); return 0; } |