| #include "builtin.h" |
| #include "delta.h" |
| #include "pack.h" |
| #include "csum-file.h" |
| #include "blob.h" |
| #include "commit.h" |
| #include "tag.h" |
| #include "tree.h" |
| #include "progress.h" |
| #include "fsck.h" |
| #include "exec_cmd.h" |
| #include "streaming.h" |
| #include "thread-utils.h" |
| |
| static const char index_pack_usage[] = |
| "git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])"; |
| |
| struct object_entry { |
| struct pack_idx_entry idx; |
| unsigned long size; |
| unsigned int hdr_size; |
| enum object_type type; |
| enum object_type real_type; |
| unsigned delta_depth; |
| int base_object_no; |
| }; |
| |
| union delta_base { |
| unsigned char sha1[20]; |
| off_t offset; |
| }; |
| |
| struct base_data { |
| struct base_data *base; |
| struct base_data *child; |
| struct object_entry *obj; |
| void *data; |
| unsigned long size; |
| int ref_first, ref_last; |
| int ofs_first, ofs_last; |
| }; |
| |
| #if !defined(NO_PTHREADS) && defined(NO_THREAD_SAFE_PREAD) |
| /* pread() emulation is not thread-safe. Disable threading. */ |
| #define NO_PTHREADS |
| #endif |
| |
| struct thread_local { |
| #ifndef NO_PTHREADS |
| pthread_t thread; |
| #endif |
| struct base_data *base_cache; |
| size_t base_cache_used; |
| }; |
| |
| /* |
| * Even if sizeof(union delta_base) == 24 on 64-bit archs, we really want |
| * to memcmp() only the first 20 bytes. |
| */ |
| #define UNION_BASE_SZ 20 |
| |
| #define FLAG_LINK (1u<<20) |
| #define FLAG_CHECKED (1u<<21) |
| |
| struct delta_entry { |
| union delta_base base; |
| int obj_no; |
| }; |
| |
| static struct object_entry *objects; |
| static struct delta_entry *deltas; |
| static struct thread_local nothread_data; |
| static int nr_objects; |
| static int nr_deltas; |
| static int nr_resolved_deltas; |
| static int nr_threads; |
| |
| static int from_stdin; |
| static int strict; |
| static int do_fsck_object; |
| static int verbose; |
| static int show_stat; |
| static int check_self_contained_and_connected; |
| |
| 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 unsigned deepest_delta; |
| static git_SHA_CTX input_ctx; |
| static uint32_t input_crc32; |
| static int input_fd, output_fd, pack_fd; |
| |
| #ifndef NO_PTHREADS |
| |
| static struct thread_local *thread_data; |
| static int nr_dispatched; |
| static int threads_active; |
| |
| static pthread_mutex_t read_mutex; |
| #define read_lock() lock_mutex(&read_mutex) |
| #define read_unlock() unlock_mutex(&read_mutex) |
| |
| static pthread_mutex_t counter_mutex; |
| #define counter_lock() lock_mutex(&counter_mutex) |
| #define counter_unlock() unlock_mutex(&counter_mutex) |
| |
| static pthread_mutex_t work_mutex; |
| #define work_lock() lock_mutex(&work_mutex) |
| #define work_unlock() unlock_mutex(&work_mutex) |
| |
| static pthread_mutex_t deepest_delta_mutex; |
| #define deepest_delta_lock() lock_mutex(&deepest_delta_mutex) |
| #define deepest_delta_unlock() unlock_mutex(&deepest_delta_mutex) |
| |
| static pthread_key_t key; |
| |
| static inline void lock_mutex(pthread_mutex_t *mutex) |
| { |
| if (threads_active) |
| pthread_mutex_lock(mutex); |
| } |
| |
| static inline void unlock_mutex(pthread_mutex_t *mutex) |
| { |
| if (threads_active) |
| pthread_mutex_unlock(mutex); |
| } |
| |
| /* |
| * Mutex and conditional variable can't be statically-initialized on Windows. |
| */ |
| static void init_thread(void) |
| { |
| init_recursive_mutex(&read_mutex); |
| pthread_mutex_init(&counter_mutex, NULL); |
| pthread_mutex_init(&work_mutex, NULL); |
| if (show_stat) |
| pthread_mutex_init(&deepest_delta_mutex, NULL); |
| pthread_key_create(&key, NULL); |
| thread_data = xcalloc(nr_threads, sizeof(*thread_data)); |
| threads_active = 1; |
| } |
| |
| static void cleanup_thread(void) |
| { |
| if (!threads_active) |
| return; |
| threads_active = 0; |
| pthread_mutex_destroy(&read_mutex); |
| pthread_mutex_destroy(&counter_mutex); |
| pthread_mutex_destroy(&work_mutex); |
| if (show_stat) |
| pthread_mutex_destroy(&deepest_delta_mutex); |
| pthread_key_delete(key); |
| free(thread_data); |
| } |
| |
| #else |
| |
| #define read_lock() |
| #define read_unlock() |
| |
| #define counter_lock() |
| #define counter_unlock() |
| |
| #define work_lock() |
| #define work_unlock() |
| |
| #define deepest_delta_lock() |
| #define deepest_delta_unlock() |
| |
| #endif |
| |
| |
| static int mark_link(struct object *obj, int type, void *data) |
| { |
| 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; |
| } |
| |
| /* The content of each linked object must have been checked |
| or it must be already present in the object database */ |
| static unsigned check_object(struct object *obj) |
| { |
| if (!obj) |
| return 0; |
| |
| if (!(obj->flags & FLAG_LINK)) |
| return 0; |
| |
| 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 1; |
| } |
| |
| return 0; |
| } |
| |
| static unsigned check_objects(void) |
| { |
| unsigned i, max, foreign_nr = 0; |
| |
| max = get_max_object_index(); |
| for (i = 0; i < max; i++) |
| foreign_nr += check_object(get_indexed_object(i)); |
| return foreign_nr; |
| } |
| |
| |
| /* Discard current buffer used content. */ |
| static void flush(void) |
| { |
| if (input_offset) { |
| if (output_fd >= 0) |
| write_or_die(output_fd, 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; |
| } |
| } |
| |
| /* |
| * Make sure at least "min" bytes are available in the buffer, and |
| * return the pointer to the buffer. |
| */ |
| static void *fill(int min) |
| { |
| if (min <= input_len) |
| return input_buffer + input_offset; |
| if (min > sizeof(input_buffer)) |
| die(Q_("cannot fill %d byte", |
| "cannot fill %d bytes", |
| min), |
| min); |
| flush(); |
| do { |
| ssize_t ret = xread(input_fd, input_buffer + input_len, |
| sizeof(input_buffer) - input_len); |
| if (ret <= 0) { |
| if (!ret) |
| die(_("early EOF")); |
| 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; |
| } |
| |
| 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 (signed_add_overflows(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) |
| { |
| if (from_stdin) { |
| input_fd = 0; |
| if (!pack_name) { |
| static char tmp_file[PATH_MAX]; |
| output_fd = odb_mkstemp(tmp_file, sizeof(tmp_file), |
| "pack/tmp_pack_XXXXXX"); |
| pack_name = xstrdup(tmp_file); |
| } else |
| output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600); |
| if (output_fd < 0) |
| 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_errno(_("cannot open packfile '%s'"), pack_name); |
| output_fd = -1; |
| pack_fd = input_fd; |
| } |
| git_SHA1_Init(&input_ctx); |
| return pack_name; |
| } |
| |
| static void parse_pack_header(void) |
| { |
| struct pack_header *hdr = fill(sizeof(struct pack_header)); |
| |
| /* Header consistency check */ |
| if (hdr->hdr_signature != htonl(PACK_SIGNATURE)) |
| die(_("pack signature mismatch")); |
| if (!pack_version_ok(hdr->hdr_version)) |
| die(_("pack version %"PRIu32" unsupported"), |
| ntohl(hdr->hdr_version)); |
| |
| nr_objects = ntohl(hdr->hdr_entries); |
| use(sizeof(struct pack_header)); |
| } |
| |
| static NORETURN void bad_object(unsigned long offset, const char *format, |
| ...) __attribute__((format (printf, 2, 3))); |
| |
| static NORETURN void bad_object(unsigned long offset, const char *format, ...) |
| { |
| va_list params; |
| char buf[1024]; |
| |
| va_start(params, format); |
| vsnprintf(buf, sizeof(buf), format, params); |
| va_end(params); |
| die(_("pack has bad object at offset %lu: %s"), offset, buf); |
| } |
| |
| static inline struct thread_local *get_thread_data(void) |
| { |
| #ifndef NO_PTHREADS |
| if (threads_active) |
| return pthread_getspecific(key); |
| assert(!threads_active && |
| "This should only be reached when all threads are gone"); |
| #endif |
| return ¬hread_data; |
| } |
| |
| #ifndef NO_PTHREADS |
| static void set_thread_data(struct thread_local *data) |
| { |
| if (threads_active) |
| pthread_setspecific(key, data); |
| } |
| #endif |
| |
| static struct base_data *alloc_base_data(void) |
| { |
| struct base_data *base = xmalloc(sizeof(struct base_data)); |
| memset(base, 0, sizeof(*base)); |
| base->ref_last = -1; |
| base->ofs_last = -1; |
| return base; |
| } |
| |
| static void free_base_data(struct base_data *c) |
| { |
| if (c->data) { |
| free(c->data); |
| c->data = NULL; |
| get_thread_data()->base_cache_used -= c->size; |
| } |
| } |
| |
| static void prune_base_data(struct base_data *retain) |
| { |
| struct base_data *b; |
| struct thread_local *data = get_thread_data(); |
| for (b = data->base_cache; |
| data->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 |
| get_thread_data()->base_cache = c; |
| |
| c->base = base; |
| c->child = NULL; |
| if (c->data) |
| get_thread_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 |
| get_thread_data()->base_cache = NULL; |
| free_base_data(c); |
| } |
| |
| static int is_delta_type(enum object_type type) |
| { |
| return (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA); |
| } |
| |
| static void *unpack_entry_data(unsigned long offset, unsigned long size, |
| enum object_type type, unsigned char *sha1) |
| { |
| static char fixed_buf[8192]; |
| int status; |
| git_zstream stream; |
| void *buf; |
| git_SHA_CTX c; |
| char hdr[32]; |
| int hdrlen; |
| |
| if (!is_delta_type(type)) { |
| hdrlen = sprintf(hdr, "%s %lu", typename(type), size) + 1; |
| git_SHA1_Init(&c); |
| git_SHA1_Update(&c, hdr, hdrlen); |
| } else |
| sha1 = NULL; |
| if (type == OBJ_BLOB && size > big_file_threshold) |
| buf = fixed_buf; |
| else |
| buf = xmalloc(size); |
| |
| memset(&stream, 0, sizeof(stream)); |
| git_inflate_init(&stream); |
| stream.next_out = buf; |
| stream.avail_out = buf == fixed_buf ? sizeof(fixed_buf) : size; |
| |
| do { |
| unsigned char *last_out = stream.next_out; |
| stream.next_in = fill(1); |
| stream.avail_in = input_len; |
| status = git_inflate(&stream, 0); |
| use(input_len - stream.avail_in); |
| if (sha1) |
| git_SHA1_Update(&c, last_out, stream.next_out - last_out); |
| if (buf == fixed_buf) { |
| stream.next_out = buf; |
| stream.avail_out = sizeof(fixed_buf); |
| } |
| } while (status == Z_OK); |
| if (stream.total_out != size || status != Z_STREAM_END) |
| bad_object(offset, _("inflate returned %d"), status); |
| git_inflate_end(&stream); |
| if (sha1) |
| git_SHA1_Final(sha1, &c); |
| return buf == fixed_buf ? NULL : buf; |
| } |
| |
| static void *unpack_raw_entry(struct object_entry *obj, |
| union delta_base *delta_base, |
| unsigned char *sha1) |
| { |
| unsigned char *p; |
| unsigned long size, c; |
| off_t base_offset; |
| unsigned shift; |
| void *data; |
| |
| obj->idx.offset = consumed_bytes; |
| input_crc32 = crc32(0, NULL, 0); |
| |
| p = fill(1); |
| c = *p; |
| use(1); |
| obj->type = (c >> 4) & 7; |
| size = (c & 15); |
| shift = 4; |
| while (c & 0x80) { |
| p = fill(1); |
| c = *p; |
| use(1); |
| size += (c & 0x7f) << shift; |
| shift += 7; |
| } |
| obj->size = size; |
| |
| switch (obj->type) { |
| case OBJ_REF_DELTA: |
| hashcpy(delta_base->sha1, fill(20)); |
| use(20); |
| break; |
| case OBJ_OFS_DELTA: |
| memset(delta_base, 0, sizeof(*delta_base)); |
| p = fill(1); |
| c = *p; |
| use(1); |
| base_offset = c & 127; |
| while (c & 128) { |
| base_offset += 1; |
| 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->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: |
| case OBJ_BLOB: |
| case OBJ_TAG: |
| break; |
| default: |
| bad_object(obj->idx.offset, _("unknown object type %d"), obj->type); |
| } |
| obj->hdr_size = consumed_bytes - obj->idx.offset; |
| |
| data = unpack_entry_data(obj->idx.offset, obj->size, obj->type, sha1); |
| obj->idx.crc32 = input_crc32; |
| return data; |
| } |
| |
| static void *unpack_data(struct object_entry *obj, |
| int (*consume)(const unsigned char *, unsigned long, void *), |
| void *cb_data) |
| { |
| off_t from = obj[0].idx.offset + obj[0].hdr_size; |
| unsigned long len = obj[1].idx.offset - from; |
| unsigned char *data, *inbuf; |
| git_zstream stream; |
| int status; |
| |
| data = xmalloc(consume ? 64*1024 : obj->size); |
| inbuf = xmalloc((len < 64*1024) ? len : 64*1024); |
| |
| memset(&stream, 0, sizeof(stream)); |
| git_inflate_init(&stream); |
| stream.next_out = data; |
| stream.avail_out = consume ? 64*1024 : obj->size; |
| |
| do { |
| ssize_t n = (len < 64*1024) ? len : 64*1024; |
| n = pread(pack_fd, inbuf, n, from); |
| if (n < 0) |
| die_errno(_("cannot pread pack file")); |
| if (!n) |
| die(Q_("premature end of pack file, %lu byte missing", |
| "premature end of pack file, %lu bytes missing", |
| len), |
| len); |
| from += n; |
| len -= n; |
| stream.next_in = inbuf; |
| stream.avail_in = n; |
| if (!consume) |
| status = git_inflate(&stream, 0); |
| else { |
| do { |
| status = git_inflate(&stream, 0); |
| if (consume(data, stream.next_out - data, cb_data)) { |
| free(inbuf); |
| free(data); |
| return NULL; |
| } |
| stream.next_out = data; |
| stream.avail_out = 64*1024; |
| } while (status == Z_OK && stream.avail_in); |
| } |
| } while (len && status == Z_OK && !stream.avail_in); |
| |
| /* This has been inflated OK when first encountered, so... */ |
| if (status != Z_STREAM_END || stream.total_out != obj->size) |
| die(_("serious inflate inconsistency")); |
| |
| git_inflate_end(&stream); |
| free(inbuf); |
| if (consume) { |
| free(data); |
| data = NULL; |
| } |
| return data; |
| } |
| |
| static void *get_data_from_pack(struct object_entry *obj) |
| { |
| return unpack_data(obj, NULL, NULL); |
| } |
| |
| static int compare_delta_bases(const union delta_base *base1, |
| const union delta_base *base2, |
| enum object_type type1, |
| enum object_type type2) |
| { |
| int cmp = type1 - type2; |
| if (cmp) |
| return cmp; |
| return memcmp(base1, base2, UNION_BASE_SZ); |
| } |
| |
| static int find_delta(const union delta_base *base, enum object_type type) |
| { |
| int first = 0, last = nr_deltas; |
| |
| while (first < last) { |
| int next = (first + last) / 2; |
| struct delta_entry *delta = &deltas[next]; |
| int cmp; |
| |
| cmp = compare_delta_bases(base, &delta->base, |
| type, objects[delta->obj_no].type); |
| if (!cmp) |
| return next; |
| if (cmp < 0) { |
| last = next; |
| continue; |
| } |
| first = next+1; |
| } |
| return -first-1; |
| } |
| |
| static void find_delta_children(const union delta_base *base, |
| int *first_index, int *last_index, |
| enum object_type type) |
| { |
| int first = find_delta(base, type); |
| int last = first; |
| int end = nr_deltas - 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; |
| } |
| |
| struct compare_data { |
| struct object_entry *entry; |
| struct git_istream *st; |
| unsigned char *buf; |
| unsigned long buf_size; |
| }; |
| |
| static int compare_objects(const unsigned char *buf, unsigned long size, |
| void *cb_data) |
| { |
| struct compare_data *data = cb_data; |
| |
| if (data->buf_size < size) { |
| free(data->buf); |
| data->buf = xmalloc(size); |
| data->buf_size = size; |
| } |
| |
| while (size) { |
| ssize_t len = read_istream(data->st, data->buf, size); |
| if (len == 0) |
| die(_("SHA1 COLLISION FOUND WITH %s !"), |
| sha1_to_hex(data->entry->idx.sha1)); |
| if (len < 0) |
| die(_("unable to read %s"), |
| sha1_to_hex(data->entry->idx.sha1)); |
| if (memcmp(buf, data->buf, len)) |
| die(_("SHA1 COLLISION FOUND WITH %s !"), |
| sha1_to_hex(data->entry->idx.sha1)); |
| size -= len; |
| buf += len; |
| } |
| return 0; |
| } |
| |
| static int check_collison(struct object_entry *entry) |
| { |
| struct compare_data data; |
| enum object_type type; |
| unsigned long size; |
| |
| if (entry->size <= big_file_threshold || entry->type != OBJ_BLOB) |
| return -1; |
| |
| memset(&data, 0, sizeof(data)); |
| data.entry = entry; |
| data.st = open_istream(entry->idx.sha1, &type, &size, NULL); |
| if (!data.st) |
| return -1; |
| if (size != entry->size || type != entry->type) |
| die(_("SHA1 COLLISION FOUND WITH %s !"), |
| sha1_to_hex(entry->idx.sha1)); |
| unpack_data(entry, compare_objects, &data); |
| close_istream(data.st); |
| free(data.buf); |
| return 0; |
| } |
| |
| static void sha1_object(const void *data, struct object_entry *obj_entry, |
| unsigned long size, enum object_type type, |
| const unsigned char *sha1) |
| { |
| void *new_data = NULL; |
| int collision_test_needed; |
| |
| assert(data || obj_entry); |
| |
| read_lock(); |
| collision_test_needed = has_sha1_file(sha1); |
| read_unlock(); |
| |
| if (collision_test_needed && !data) { |
| read_lock(); |
| if (!check_collison(obj_entry)) |
| collision_test_needed = 0; |
| read_unlock(); |
| } |
| if (collision_test_needed) { |
| void *has_data; |
| enum object_type has_type; |
| unsigned long has_size; |
| read_lock(); |
| has_type = sha1_object_info(sha1, &has_size); |
| if (has_type != type || has_size != size) |
| die(_("SHA1 COLLISION FOUND WITH %s !"), sha1_to_hex(sha1)); |
| has_data = read_sha1_file(sha1, &has_type, &has_size); |
| read_unlock(); |
| if (!data) |
| data = new_data = get_data_from_pack(obj_entry); |
| if (!has_data) |
| die(_("cannot read existing object %s"), sha1_to_hex(sha1)); |
| if (size != has_size || type != has_type || |
| memcmp(data, has_data, size) != 0) |
| die(_("SHA1 COLLISION FOUND WITH %s !"), sha1_to_hex(sha1)); |
| free(has_data); |
| } |
| |
| if (strict) { |
| read_lock(); |
| 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; |
| |
| assert(data && "data can only be NULL for large _blobs_"); |
| |
| /* |
| * 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 (do_fsck_object && |
| 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; |
| } |
| read_unlock(); |
| } |
| |
| free(new_data); |
| } |
| |
| /* |
| * This function is part of find_unresolved_deltas(). There are two |
| * walkers going in the opposite ways. |
| * |
| * The first one in find_unresolved_deltas() traverses down from |
| * parent node to children, deflating nodes along the way. However, |
| * memory for deflated nodes is limited by delta_base_cache_limit, so |
| * at some point parent node's deflated content may be freed. |
| * |
| * The second walker is this function, which goes from current node up |
| * to top parent if necessary to deflate the node. In normal |
| * situation, its parent node would be already deflated, so it just |
| * needs to apply delta. |
| * |
| * In the worst case scenario, parent node is no longer deflated because |
| * we're running out of delta_base_cache_limit; we need to re-deflate |
| * parents, possibly up to the top base. |
| * |
| * All deflated objects here are subject to be freed if we exceed |
| * delta_base_cache_limit, just like in find_unresolved_deltas(), we |
| * just need to make sure the last node is not freed. |
| */ |
| static void *get_base_data(struct base_data *c) |
| { |
| if (!c->data) { |
| struct object_entry *obj = c->obj; |
| struct base_data **delta = NULL; |
| int delta_nr = 0, delta_alloc = 0; |
| |
| while (is_delta_type(c->obj->type) && !c->data) { |
| ALLOC_GROW(delta, delta_nr + 1, delta_alloc); |
| delta[delta_nr++] = c; |
| c = c->base; |
| } |
| if (!delta_nr) { |
| c->data = get_data_from_pack(obj); |
| c->size = obj->size; |
| get_thread_data()->base_cache_used += c->size; |
| prune_base_data(c); |
| } |
| for (; delta_nr > 0; delta_nr--) { |
| void *base, *raw; |
| c = delta[delta_nr - 1]; |
| obj = c->obj; |
| base = get_base_data(c->base); |
| 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")); |
| get_thread_data()->base_cache_used += c->size; |
| prune_base_data(c); |
| } |
| free(delta); |
| } |
| 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; |
| if (show_stat) { |
| delta_obj->delta_depth = base->obj->delta_depth + 1; |
| deepest_delta_lock(); |
| if (deepest_delta < delta_obj->delta_depth) |
| deepest_delta = delta_obj->delta_depth; |
| deepest_delta_unlock(); |
| } |
| delta_obj->base_object_no = base->obj - objects; |
| delta_data = get_data_from_pack(delta_obj); |
| 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->data) |
| bad_object(delta_obj->idx.offset, _("failed to apply delta")); |
| hash_sha1_file(result->data, result->size, |
| typename(delta_obj->real_type), delta_obj->idx.sha1); |
| sha1_object(result->data, NULL, result->size, delta_obj->real_type, |
| delta_obj->idx.sha1); |
| counter_lock(); |
| nr_resolved_deltas++; |
| counter_unlock(); |
| } |
| |
| static struct base_data *find_unresolved_deltas_1(struct base_data *base, |
| struct base_data *prev_base) |
| { |
| if (base->ref_last == -1 && base->ofs_last == -1) { |
| union delta_base base_spec; |
| |
| hashcpy(base_spec.sha1, base->obj->idx.sha1); |
| find_delta_children(&base_spec, |
| &base->ref_first, &base->ref_last, OBJ_REF_DELTA); |
| |
| memset(&base_spec, 0, sizeof(base_spec)); |
| base_spec.offset = base->obj->idx.offset; |
| find_delta_children(&base_spec, |
| &base->ofs_first, &base->ofs_last, OBJ_OFS_DELTA); |
| |
| if (base->ref_last == -1 && base->ofs_last == -1) { |
| free(base->data); |
| return NULL; |
| } |
| |
| link_base_data(prev_base, base); |
| } |
| |
| if (base->ref_first <= base->ref_last) { |
| struct object_entry *child = objects + deltas[base->ref_first].obj_no; |
| struct base_data *result = alloc_base_data(); |
| |
| assert(child->real_type == OBJ_REF_DELTA); |
| resolve_delta(child, base, result); |
| if (base->ref_first == base->ref_last && base->ofs_last == -1) |
| free_base_data(base); |
| |
| base->ref_first++; |
| return result; |
| } |
| |
| if (base->ofs_first <= base->ofs_last) { |
| struct object_entry *child = objects + deltas[base->ofs_first].obj_no; |
| struct base_data *result = alloc_base_data(); |
| |
| assert(child->real_type == OBJ_OFS_DELTA); |
| resolve_delta(child, base, result); |
| if (base->ofs_first == base->ofs_last) |
| free_base_data(base); |
| |
| base->ofs_first++; |
| return result; |
| } |
| |
| unlink_base_data(base); |
| return NULL; |
| } |
| |
| static void find_unresolved_deltas(struct base_data *base) |
| { |
| struct base_data *new_base, *prev_base = NULL; |
| for (;;) { |
| new_base = find_unresolved_deltas_1(base, prev_base); |
| |
| if (new_base) { |
| prev_base = base; |
| base = new_base; |
| } else { |
| free(base); |
| base = prev_base; |
| if (!base) |
| return; |
| prev_base = base->base; |
| } |
| } |
| } |
| |
| static int compare_delta_entry(const void *a, const void *b) |
| { |
| const struct delta_entry *delta_a = a; |
| const struct delta_entry *delta_b = b; |
| |
| /* group by type (ref vs ofs) and then by value (sha-1 or offset) */ |
| return compare_delta_bases(&delta_a->base, &delta_b->base, |
| objects[delta_a->obj_no].type, |
| objects[delta_b->obj_no].type); |
| } |
| |
| static void resolve_base(struct object_entry *obj) |
| { |
| struct base_data *base_obj = alloc_base_data(); |
| base_obj->obj = obj; |
| base_obj->data = NULL; |
| find_unresolved_deltas(base_obj); |
| } |
| |
| #ifndef NO_PTHREADS |
| static void *threaded_second_pass(void *data) |
| { |
| set_thread_data(data); |
| for (;;) { |
| int i; |
| counter_lock(); |
| display_progress(progress, nr_resolved_deltas); |
| counter_unlock(); |
| work_lock(); |
| while (nr_dispatched < nr_objects && |
| is_delta_type(objects[nr_dispatched].type)) |
| nr_dispatched++; |
| if (nr_dispatched >= nr_objects) { |
| work_unlock(); |
| break; |
| } |
| i = nr_dispatched++; |
| work_unlock(); |
| |
| resolve_base(&objects[i]); |
| } |
| return NULL; |
| } |
| #endif |
| |
| /* |
| * First pass: |
| * - find locations of all objects; |
| * - calculate SHA1 of all non-delta objects; |
| * - remember base (SHA1 or offset) for all deltas. |
| */ |
| static void parse_pack_objects(unsigned char *sha1) |
| { |
| int i, nr_delays = 0; |
| struct delta_entry *delta = deltas; |
| struct stat st; |
| |
| if (verbose) |
| progress = start_progress( |
| from_stdin ? _("Receiving objects") : _("Indexing objects"), |
| nr_objects); |
| for (i = 0; i < nr_objects; i++) { |
| struct object_entry *obj = &objects[i]; |
| void *data = unpack_raw_entry(obj, &delta->base, obj->idx.sha1); |
| obj->real_type = obj->type; |
| if (is_delta_type(obj->type)) { |
| nr_deltas++; |
| delta->obj_no = i; |
| delta++; |
| } else if (!data) { |
| /* large blobs, check later */ |
| obj->real_type = OBJ_BAD; |
| nr_delays++; |
| } else |
| sha1_object(data, NULL, obj->size, obj->type, obj->idx.sha1); |
| free(data); |
| display_progress(progress, i+1); |
| } |
| objects[i].idx.offset = consumed_bytes; |
| stop_progress(&progress); |
| |
| /* Check pack integrity */ |
| flush(); |
| 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_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")); |
| |
| for (i = 0; i < nr_objects; i++) { |
| struct object_entry *obj = &objects[i]; |
| if (obj->real_type != OBJ_BAD) |
| continue; |
| obj->real_type = obj->type; |
| sha1_object(NULL, obj, obj->size, obj->type, obj->idx.sha1); |
| nr_delays--; |
| } |
| if (nr_delays) |
| die(_("confusion beyond insanity in parse_pack_objects()")); |
| } |
| |
| /* |
| * Second pass: |
| * - for all non-delta objects, look if it is used as a base for |
| * deltas; |
| * - if used as a base, uncompress the object and apply all deltas, |
| * recursively checking if the resulting object is used as a base |
| * for some more deltas. |
| */ |
| static void resolve_deltas(void) |
| { |
| int i; |
| |
| if (!nr_deltas) |
| return; |
| |
| /* Sort deltas by base SHA1/offset for fast searching */ |
| qsort(deltas, nr_deltas, sizeof(struct delta_entry), |
| compare_delta_entry); |
| |
| if (verbose) |
| progress = start_progress(_("Resolving deltas"), nr_deltas); |
| |
| #ifndef NO_PTHREADS |
| nr_dispatched = 0; |
| if (nr_threads > 1 || getenv("GIT_FORCE_THREADS")) { |
| init_thread(); |
| for (i = 0; i < nr_threads; i++) { |
| int ret = pthread_create(&thread_data[i].thread, NULL, |
| threaded_second_pass, thread_data + i); |
| if (ret) |
| die(_("unable to create thread: %s"), |
| strerror(ret)); |
| } |
| for (i = 0; i < nr_threads; i++) |
| pthread_join(thread_data[i].thread, NULL); |
| cleanup_thread(); |
| return; |
| } |
| #endif |
| |
| for (i = 0; i < nr_objects; i++) { |
| struct object_entry *obj = &objects[i]; |
| |
| if (is_delta_type(obj->type)) |
| continue; |
| resolve_base(obj); |
| display_progress(progress, nr_resolved_deltas); |
| } |
| } |
| |
| /* |
| * Third pass: |
| * - append objects to convert thin pack to full pack if required |
| * - write the final 20-byte SHA-1 |
| */ |
| static void fix_unresolved_deltas(struct sha1file *f, int nr_unresolved); |
| static void conclude_pack(int fix_thin_pack, const char *curr_pack, unsigned char *pack_sha1) |
| { |
| if (nr_deltas == nr_resolved_deltas) { |
| stop_progress(&progress); |
| /* Flush remaining pack final 20-byte SHA1. */ |
| flush(); |
| return; |
| } |
| |
| if (fix_thin_pack) { |
| struct sha1file *f; |
| unsigned char read_sha1[20], tail_sha1[20]; |
| struct strbuf msg = STRBUF_INIT; |
| int nr_unresolved = nr_deltas - nr_resolved_deltas; |
| int nr_objects_initial = nr_objects; |
| if (nr_unresolved <= 0) |
| die(_("confusion beyond insanity")); |
| objects = xrealloc(objects, |
| (nr_objects + nr_unresolved + 1) |
| * sizeof(*objects)); |
| memset(objects + nr_objects + 1, 0, |
| nr_unresolved * sizeof(*objects)); |
| f = sha1fd(output_fd, curr_pack); |
| fix_unresolved_deltas(f, nr_unresolved); |
| strbuf_addf(&msg, _("completed with %d local objects"), |
| nr_objects - nr_objects_initial); |
| stop_progress_msg(&progress, msg.buf); |
| strbuf_release(&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(Q_("pack has %d unresolved delta", |
| "pack has %d unresolved deltas", |
| nr_deltas - nr_resolved_deltas), |
| nr_deltas - nr_resolved_deltas); |
| } |
| |
| static int write_compressed(struct sha1file *f, void *in, unsigned int size) |
| { |
| git_zstream stream; |
| int status; |
| unsigned char outbuf[4096]; |
| |
| memset(&stream, 0, sizeof(stream)); |
| git_deflate_init(&stream, zlib_compression_level); |
| stream.next_in = in; |
| stream.avail_in = size; |
| |
| do { |
| stream.next_out = outbuf; |
| stream.avail_out = sizeof(outbuf); |
| status = git_deflate(&stream, Z_FINISH); |
| sha1write(f, outbuf, sizeof(outbuf) - stream.avail_out); |
| } while (status == Z_OK); |
| |
| if (status != Z_STREAM_END) |
| die(_("unable to deflate appended object (%d)"), status); |
| size = stream.total_out; |
| git_deflate_end(&stream); |
| return size; |
| } |
| |
| 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++]; |
| unsigned char header[10]; |
| unsigned long s = size; |
| int n = 0; |
| unsigned char c = (type << 4) | (s & 15); |
| s >>= 4; |
| while (s) { |
| header[n++] = c | 0x80; |
| c = s & 0x7f; |
| s >>= 7; |
| } |
| header[n++] = c; |
| 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) |
| { |
| struct delta_entry *a = *(struct delta_entry **)_a; |
| struct delta_entry *b = *(struct delta_entry **)_b; |
| return a->obj_no - b->obj_no; |
| } |
| |
| static void fix_unresolved_deltas(struct sha1file *f, int nr_unresolved) |
| { |
| struct delta_entry **sorted_by_pos; |
| int i, n = 0; |
| |
| /* |
| * Since many unresolved deltas may well be themselves base objects |
| * for more unresolved deltas, we really want to include the |
| * smallest number of base objects that would cover as much delta |
| * as possible by picking the |
| * trunc deltas first, allowing for other deltas to resolve without |
| * additional base objects. Since most base objects are to be found |
| * before deltas depending on them, a good heuristic is to start |
| * resolving deltas in the same order as their position in the pack. |
| */ |
| sorted_by_pos = xmalloc(nr_unresolved * sizeof(*sorted_by_pos)); |
| for (i = 0; i < nr_deltas; i++) { |
| if (objects[deltas[i].obj_no].real_type != OBJ_REF_DELTA) |
| continue; |
| sorted_by_pos[n++] = &deltas[i]; |
| } |
| qsort(sorted_by_pos, n, sizeof(*sorted_by_pos), delta_pos_compare); |
| |
| for (i = 0; i < n; i++) { |
| struct delta_entry *d = sorted_by_pos[i]; |
| enum object_type type; |
| struct base_data *base_obj = alloc_base_data(); |
| |
| if (objects[d->obj_no].real_type != OBJ_REF_DELTA) |
| continue; |
| base_obj->data = read_sha1_file(d->base.sha1, &type, &base_obj->size); |
| if (!base_obj->data) |
| continue; |
| |
| 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)); |
| base_obj->obj = append_obj_to_pack(f, d->base.sha1, |
| base_obj->data, base_obj->size, type); |
| find_unresolved_deltas(base_obj); |
| display_progress(progress, nr_resolved_deltas); |
| } |
| free(sorted_by_pos); |
| } |
| |
| static void final(const char *final_pack_name, const char *curr_pack_name, |
| const char *final_index_name, const char *curr_index_name, |
| const char *keep_name, const char *keep_msg, |
| unsigned char *sha1) |
| { |
| const char *report = "pack"; |
| char name[PATH_MAX]; |
| int err; |
| |
| if (!from_stdin) { |
| close(input_fd); |
| } else { |
| fsync_or_die(output_fd, curr_pack_name); |
| err = close(output_fd); |
| if (err) |
| die_errno(_("error while closing pack file")); |
| } |
| |
| if (keep_msg) { |
| int keep_fd, keep_msg_len = strlen(keep_msg); |
| |
| 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_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); |
| } |
| if (close(keep_fd) != 0) |
| die_errno(_("cannot close written keep file '%s'"), |
| keep_name); |
| report = "keep"; |
| } |
| } |
| |
| if (final_pack_name != curr_pack_name) { |
| if (!final_pack_name) { |
| snprintf(name, sizeof(name), "%s/pack/pack-%s.pack", |
| get_object_directory(), sha1_to_hex(sha1)); |
| final_pack_name = 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); |
| |
| if (final_index_name != curr_index_name) { |
| if (!final_index_name) { |
| snprintf(name, sizeof(name), "%s/pack/pack-%s.idx", |
| get_object_directory(), sha1_to_hex(sha1)); |
| final_index_name = 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)); |
| } else { |
| char buf[48]; |
| int len = snprintf(buf, sizeof(buf), "%s\t%s\n", |
| report, sha1_to_hex(sha1)); |
| write_or_die(1, buf, len); |
| |
| /* |
| * Let's just mimic git-unpack-objects here and write |
| * the last part of the input buffer to stdout. |
| */ |
| while (input_len) { |
| err = xwrite(1, input_buffer + input_offset, input_len); |
| if (err <= 0) |
| break; |
| input_len -= err; |
| input_offset += err; |
| } |
| } |
| } |
| |
| static int git_index_pack_config(const char *k, const char *v, void *cb) |
| { |
| struct pack_idx_option *opts = cb; |
| |
| if (!strcmp(k, "pack.indexversion")) { |
| opts->version = git_config_int(k, v); |
| if (opts->version > 2) |
| die(_("bad pack.indexversion=%"PRIu32), opts->version); |
| return 0; |
| } |
| if (!strcmp(k, "pack.threads")) { |
| nr_threads = git_config_int(k, v); |
| if (nr_threads < 0) |
| die(_("invalid number of threads specified (%d)"), |
| nr_threads); |
| #ifdef NO_PTHREADS |
| if (nr_threads != 1) |
| warning(_("no threads support, ignoring %s"), k); |
| nr_threads = 1; |
| #endif |
| return 0; |
| } |
| return git_default_config(k, v, cb); |
| } |
| |
| static int cmp_uint32(const void *a_, const void *b_) |
| { |
| uint32_t a = *((uint32_t *)a_); |
| uint32_t b = *((uint32_t *)b_); |
| |
| return (a < b) ? -1 : (a != b); |
| } |
| |
| static void read_v2_anomalous_offsets(struct packed_git *p, |
| struct pack_idx_option *opts) |
| { |
| const uint32_t *idx1, *idx2; |
| uint32_t i; |
| |
| /* The address of the 4-byte offset table */ |
| idx1 = (((const uint32_t *)p->index_data) |
| + 2 /* 8-byte header */ |
| + 256 /* fan out */ |
| + 5 * p->num_objects /* 20-byte SHA-1 table */ |
| + p->num_objects /* CRC32 table */ |
| ); |
| |
| /* The address of the 8-byte offset table */ |
| idx2 = idx1 + p->num_objects; |
| |
| for (i = 0; i < p->num_objects; i++) { |
| uint32_t off = ntohl(idx1[i]); |
| if (!(off & 0x80000000)) |
| continue; |
| off = off & 0x7fffffff; |
| if (idx2[off * 2]) |
| continue; |
| /* |
| * The real offset is ntohl(idx2[off * 2]) in high 4 |
| * octets, and ntohl(idx2[off * 2 + 1]) in low 4 |
| * octets. But idx2[off * 2] is Zero!!! |
| */ |
| ALLOC_GROW(opts->anomaly, opts->anomaly_nr + 1, opts->anomaly_alloc); |
| opts->anomaly[opts->anomaly_nr++] = ntohl(idx2[off * 2 + 1]); |
| } |
| |
| if (1 < opts->anomaly_nr) |
| qsort(opts->anomaly, opts->anomaly_nr, sizeof(uint32_t), cmp_uint32); |
| } |
| |
| static void read_idx_option(struct pack_idx_option *opts, const char *pack_name) |
| { |
| struct packed_git *p = add_packed_git(pack_name, strlen(pack_name), 1); |
| |
| if (!p) |
| die(_("Cannot open existing pack file '%s'"), pack_name); |
| if (open_pack_index(p)) |
| die(_("Cannot open existing pack idx file for '%s'"), pack_name); |
| |
| /* Read the attributes from the existing idx file */ |
| opts->version = p->index_version; |
| |
| if (opts->version == 2) |
| read_v2_anomalous_offsets(p, opts); |
| |
| /* |
| * Get rid of the idx file as we do not need it anymore. |
| * NEEDSWORK: extract this bit from free_pack_by_name() in |
| * sha1_file.c, perhaps? It shouldn't matter very much as we |
| * know we haven't installed this pack (hence we never have |
| * read anything from it). |
| */ |
| close_pack_index(p); |
| free(p); |
| } |
| |
| static void show_pack_info(int stat_only) |
| { |
| int i, baseobjects = nr_objects - nr_deltas; |
| unsigned long *chain_histogram = NULL; |
| |
| if (deepest_delta) |
| chain_histogram = xcalloc(deepest_delta, sizeof(unsigned long)); |
| |
| for (i = 0; i < nr_objects; i++) { |
| struct object_entry *obj = &objects[i]; |
| |
| if (is_delta_type(obj->type)) |
| chain_histogram[obj->delta_depth - 1]++; |
| if (stat_only) |
| continue; |
| printf("%s %-6s %lu %lu %"PRIuMAX, |
| sha1_to_hex(obj->idx.sha1), |
| typename(obj->real_type), obj->size, |
| (unsigned long)(obj[1].idx.offset - obj->idx.offset), |
| (uintmax_t)obj->idx.offset); |
| if (is_delta_type(obj->type)) { |
| struct object_entry *bobj = &objects[obj->base_object_no]; |
| printf(" %u %s", obj->delta_depth, sha1_to_hex(bobj->idx.sha1)); |
| } |
| putchar('\n'); |
| } |
| |
| if (baseobjects) |
| printf_ln(Q_("non delta: %d object", |
| "non delta: %d objects", |
| baseobjects), |
| baseobjects); |
| for (i = 0; i < deepest_delta; i++) { |
| if (!chain_histogram[i]) |
| continue; |
| printf_ln(Q_("chain length = %d: %lu object", |
| "chain length = %d: %lu objects", |
| chain_histogram[i]), |
| i + 1, |
| chain_histogram[i]); |
| } |
| } |
| |
| int cmd_index_pack(int argc, const char **argv, const char *prefix) |
| { |
| int i, fix_thin_pack = 0, verify = 0, stat_only = 0; |
| const char *curr_pack, *curr_index; |
| const char *index_name = NULL, *pack_name = NULL; |
| const char *keep_name = NULL, *keep_msg = NULL; |
| char *index_name_buf = NULL, *keep_name_buf = NULL; |
| struct pack_idx_entry **idx_objects; |
| struct pack_idx_option opts; |
| unsigned char pack_sha1[20]; |
| unsigned foreign_nr = 1; /* zero is a "good" value, assume bad */ |
| |
| if (argc == 2 && !strcmp(argv[1], "-h")) |
| usage(index_pack_usage); |
| |
| read_replace_refs = 0; |
| |
| reset_pack_idx_option(&opts); |
| git_config(git_index_pack_config, &opts); |
| if (prefix && chdir(prefix)) |
| die(_("Cannot come back to cwd")); |
| |
| for (i = 1; i < argc; i++) { |
| const 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; |
| do_fsck_object = 1; |
| } else if (!strcmp(arg, "--check-self-contained-and-connected")) { |
| strict = 1; |
| check_self_contained_and_connected = 1; |
| } else if (!strcmp(arg, "--verify")) { |
| verify = 1; |
| } else if (!strcmp(arg, "--verify-stat")) { |
| verify = 1; |
| show_stat = 1; |
| } else if (!strcmp(arg, "--verify-stat-only")) { |
| verify = 1; |
| show_stat = 1; |
| stat_only = 1; |
| } else if (!strcmp(arg, "--keep")) { |
| keep_msg = ""; |
| } else if (!prefixcmp(arg, "--keep=")) { |
| keep_msg = arg + 7; |
| } else if (!prefixcmp(arg, "--threads=")) { |
| char *end; |
| nr_threads = strtoul(arg+10, &end, 0); |
| if (!arg[10] || *end || nr_threads < 0) |
| usage(index_pack_usage); |
| #ifdef NO_PTHREADS |
| if (nr_threads != 1) |
| warning(_("no threads support, " |
| "ignoring %s"), arg); |
| nr_threads = 1; |
| #endif |
| } else if (!prefixcmp(arg, "--pack_header=")) { |
| struct pack_header *hdr; |
| char *c; |
| |
| hdr = (struct pack_header *)input_buffer; |
| hdr->hdr_signature = htonl(PACK_SIGNATURE); |
| hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10)); |
| if (*c != ',') |
| die(_("bad %s"), arg); |
| hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10)); |
| if (*c) |
| die(_("bad %s"), arg); |
| input_len = sizeof(*hdr); |
| } else if (!strcmp(arg, "-v")) { |
| verbose = 1; |
| } else if (!strcmp(arg, "-o")) { |
| if (index_name || (i+1) >= argc) |
| usage(index_pack_usage); |
| index_name = argv[++i]; |
| } else if (!prefixcmp(arg, "--index-version=")) { |
| char *c; |
| opts.version = strtoul(arg + 16, &c, 10); |
| if (opts.version > 2) |
| die(_("bad %s"), arg); |
| if (*c == ',') |
| opts.off32_limit = strtoul(c+1, &c, 0); |
| if (*c || opts.off32_limit & 0x80000000) |
| die(_("bad %s"), arg); |
| } else |
| usage(index_pack_usage); |
| continue; |
| } |
| |
| if (pack_name) |
| usage(index_pack_usage); |
| pack_name = arg; |
| } |
| |
| if (!pack_name && !from_stdin) |
| usage(index_pack_usage); |
| if (fix_thin_pack && !from_stdin) |
| die(_("--fix-thin cannot be used without --stdin")); |
| if (!index_name && pack_name) { |
| int len = strlen(pack_name); |
| if (!has_extension(pack_name, ".pack")) |
| die(_("packfile name '%s' does not end with '.pack'"), |
| pack_name); |
| index_name_buf = xmalloc(len); |
| memcpy(index_name_buf, pack_name, len - 5); |
| strcpy(index_name_buf + len - 5, ".idx"); |
| index_name = index_name_buf; |
| } |
| if (keep_msg && !keep_name && pack_name) { |
| int len = strlen(pack_name); |
| if (!has_extension(pack_name, ".pack")) |
| die(_("packfile name '%s' does not end with '.pack'"), |
| pack_name); |
| keep_name_buf = xmalloc(len); |
| memcpy(keep_name_buf, pack_name, len - 5); |
| strcpy(keep_name_buf + len - 5, ".keep"); |
| keep_name = keep_name_buf; |
| } |
| if (verify) { |
| if (!index_name) |
| die(_("--verify with no packfile name given")); |
| read_idx_option(&opts, index_name); |
| opts.flags |= WRITE_IDX_VERIFY | WRITE_IDX_STRICT; |
| } |
| if (strict) |
| opts.flags |= WRITE_IDX_STRICT; |
| |
| #ifndef NO_PTHREADS |
| if (!nr_threads) { |
| nr_threads = online_cpus(); |
| /* An experiment showed that more threads does not mean faster */ |
| if (nr_threads > 3) |
| nr_threads = 3; |
| } |
| #endif |
| |
| curr_pack = open_pack_file(pack_name); |
| parse_pack_header(); |
| objects = xcalloc(nr_objects + 1, sizeof(struct object_entry)); |
| deltas = xcalloc(nr_objects, sizeof(struct delta_entry)); |
| parse_pack_objects(pack_sha1); |
| resolve_deltas(); |
| conclude_pack(fix_thin_pack, curr_pack, pack_sha1); |
| free(deltas); |
| if (strict) |
| foreign_nr = check_objects(); |
| |
| if (show_stat) |
| show_pack_info(stat_only); |
| |
| 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, &opts, pack_sha1); |
| free(idx_objects); |
| |
| if (!verify) |
| final(pack_name, curr_pack, |
| index_name, curr_index, |
| keep_name, keep_msg, |
| pack_sha1); |
| else |
| close(input_fd); |
| free(objects); |
| free(index_name_buf); |
| free(keep_name_buf); |
| if (pack_name == NULL) |
| free((void *) curr_pack); |
| if (index_name == NULL) |
| free((void *) curr_index); |
| |
| /* |
| * Let the caller know this pack is not self contained |
| */ |
| if (check_self_contained_and_connected && foreign_nr) |
| return 1; |
| |
| return 0; |
| } |