| #include "cache.h" |
| #include "bundle.h" |
| #include "object.h" |
| #include "commit.h" |
| #include "diff.h" |
| #include "revision.h" |
| #include "list-objects.h" |
| #include "run-command.h" |
| #include "refs.h" |
| |
| static const char bundle_signature[] = "# v2 git bundle\n"; |
| |
| static void add_to_ref_list(const unsigned char *sha1, const char *name, |
| struct ref_list *list) |
| { |
| if (list->nr + 1 >= list->alloc) { |
| list->alloc = alloc_nr(list->nr + 1); |
| list->list = xrealloc(list->list, |
| list->alloc * sizeof(list->list[0])); |
| } |
| memcpy(list->list[list->nr].sha1, sha1, 20); |
| list->list[list->nr].name = xstrdup(name); |
| list->nr++; |
| } |
| |
| /* returns an fd */ |
| int read_bundle_header(const char *path, struct bundle_header *header) |
| { |
| char buffer[1024]; |
| int fd; |
| long fpos; |
| FILE *ffd = fopen(path, "rb"); |
| |
| if (!ffd) |
| return error("could not open '%s'", path); |
| if (!fgets(buffer, sizeof(buffer), ffd) || |
| strcmp(buffer, bundle_signature)) { |
| fclose(ffd); |
| return error("'%s' does not look like a v2 bundle file", path); |
| } |
| while (fgets(buffer, sizeof(buffer), ffd) |
| && buffer[0] != '\n') { |
| int is_prereq = buffer[0] == '-'; |
| int offset = is_prereq ? 1 : 0; |
| int len = strlen(buffer); |
| unsigned char sha1[20]; |
| struct ref_list *list = is_prereq ? &header->prerequisites |
| : &header->references; |
| char delim; |
| |
| if (len && buffer[len - 1] == '\n') |
| buffer[len - 1] = '\0'; |
| if (get_sha1_hex(buffer + offset, sha1)) { |
| warning("unrecognized header: %s", buffer); |
| continue; |
| } |
| delim = buffer[40 + offset]; |
| if (!isspace(delim) && (delim != '\0' || !is_prereq)) |
| die ("invalid header: %s", buffer); |
| add_to_ref_list(sha1, isspace(delim) ? |
| buffer + 41 + offset : "", list); |
| } |
| fpos = ftell(ffd); |
| fclose(ffd); |
| fd = open(path, O_RDONLY); |
| if (fd < 0) |
| return error("could not open '%s'", path); |
| lseek(fd, fpos, SEEK_SET); |
| return fd; |
| } |
| |
| static int list_refs(struct ref_list *r, int argc, const char **argv) |
| { |
| int i; |
| |
| for (i = 0; i < r->nr; i++) { |
| if (argc > 1) { |
| int j; |
| for (j = 1; j < argc; j++) |
| if (!strcmp(r->list[i].name, argv[j])) |
| break; |
| if (j == argc) |
| continue; |
| } |
| printf("%s %s\n", sha1_to_hex(r->list[i].sha1), |
| r->list[i].name); |
| } |
| return 0; |
| } |
| |
| #define PREREQ_MARK (1u<<16) |
| |
| int verify_bundle(struct bundle_header *header, int verbose) |
| { |
| /* |
| * Do fast check, then if any prereqs are missing then go line by line |
| * to be verbose about the errors |
| */ |
| struct ref_list *p = &header->prerequisites; |
| struct rev_info revs; |
| const char *argv[] = {NULL, "--all", NULL}; |
| struct object_array refs; |
| struct commit *commit; |
| int i, ret = 0, req_nr; |
| const char *message = "Repository lacks these prerequisite commits:"; |
| |
| init_revisions(&revs, NULL); |
| for (i = 0; i < p->nr; i++) { |
| struct ref_list_entry *e = p->list + i; |
| struct object *o = parse_object(e->sha1); |
| if (o) { |
| o->flags |= PREREQ_MARK; |
| add_pending_object(&revs, o, e->name); |
| continue; |
| } |
| if (++ret == 1) |
| error("%s", message); |
| error("%s %s", sha1_to_hex(e->sha1), e->name); |
| } |
| if (revs.pending.nr != p->nr) |
| return ret; |
| req_nr = revs.pending.nr; |
| setup_revisions(2, argv, &revs, NULL); |
| |
| memset(&refs, 0, sizeof(struct object_array)); |
| for (i = 0; i < revs.pending.nr; i++) { |
| struct object_array_entry *e = revs.pending.objects + i; |
| add_object_array(e->item, e->name, &refs); |
| } |
| |
| if (prepare_revision_walk(&revs)) |
| die("revision walk setup failed"); |
| |
| i = req_nr; |
| while (i && (commit = get_revision(&revs))) |
| if (commit->object.flags & PREREQ_MARK) |
| i--; |
| |
| for (i = 0; i < req_nr; i++) |
| if (!(refs.objects[i].item->flags & SHOWN)) { |
| if (++ret == 1) |
| error("%s", message); |
| error("%s %s", sha1_to_hex(refs.objects[i].item->sha1), |
| refs.objects[i].name); |
| } |
| |
| for (i = 0; i < refs.nr; i++) |
| clear_commit_marks((struct commit *)refs.objects[i].item, -1); |
| |
| if (verbose) { |
| struct ref_list *r; |
| |
| r = &header->references; |
| printf("The bundle contains %d ref%s\n", |
| r->nr, (1 < r->nr) ? "s" : ""); |
| list_refs(r, 0, NULL); |
| r = &header->prerequisites; |
| printf("The bundle requires these %d ref%s\n", |
| r->nr, (1 < r->nr) ? "s" : ""); |
| list_refs(r, 0, NULL); |
| } |
| return ret; |
| } |
| |
| int list_bundle_refs(struct bundle_header *header, int argc, const char **argv) |
| { |
| return list_refs(&header->references, argc, argv); |
| } |
| |
| static int is_tag_in_date_range(struct object *tag, struct rev_info *revs) |
| { |
| unsigned long size; |
| enum object_type type; |
| char *buf, *line, *lineend; |
| unsigned long date; |
| |
| if (revs->max_age == -1 && revs->min_age == -1) |
| return 1; |
| |
| buf = read_sha1_file(tag->sha1, &type, &size); |
| if (!buf) |
| return 1; |
| line = memmem(buf, size, "\ntagger ", 8); |
| if (!line++) |
| return 1; |
| lineend = memchr(line, buf + size - line, '\n'); |
| line = memchr(line, lineend ? lineend - line : buf + size - line, '>'); |
| if (!line++) |
| return 1; |
| date = strtoul(line, NULL, 10); |
| free(buf); |
| return (revs->max_age == -1 || revs->max_age < date) && |
| (revs->min_age == -1 || revs->min_age > date); |
| } |
| |
| int create_bundle(struct bundle_header *header, const char *path, |
| int argc, const char **argv) |
| { |
| static struct lock_file lock; |
| int bundle_fd = -1; |
| int bundle_to_stdout; |
| const char **argv_boundary = xmalloc((argc + 4) * sizeof(const char *)); |
| const char **argv_pack = xmalloc(6 * sizeof(const char *)); |
| int i, ref_count = 0; |
| char buffer[1024]; |
| struct rev_info revs; |
| struct child_process rls; |
| FILE *rls_fout; |
| |
| bundle_to_stdout = !strcmp(path, "-"); |
| if (bundle_to_stdout) |
| bundle_fd = 1; |
| else |
| bundle_fd = hold_lock_file_for_update(&lock, path, |
| LOCK_DIE_ON_ERROR); |
| |
| /* write signature */ |
| write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature)); |
| |
| /* init revs to list objects for pack-objects later */ |
| save_commit_buffer = 0; |
| init_revisions(&revs, NULL); |
| |
| /* write prerequisites */ |
| memcpy(argv_boundary + 3, argv + 1, argc * sizeof(const char *)); |
| argv_boundary[0] = "rev-list"; |
| argv_boundary[1] = "--boundary"; |
| argv_boundary[2] = "--pretty=oneline"; |
| argv_boundary[argc + 2] = NULL; |
| memset(&rls, 0, sizeof(rls)); |
| rls.argv = argv_boundary; |
| rls.out = -1; |
| rls.git_cmd = 1; |
| if (start_command(&rls)) |
| return -1; |
| rls_fout = xfdopen(rls.out, "r"); |
| while (fgets(buffer, sizeof(buffer), rls_fout)) { |
| unsigned char sha1[20]; |
| if (buffer[0] == '-') { |
| write_or_die(bundle_fd, buffer, strlen(buffer)); |
| if (!get_sha1_hex(buffer + 1, sha1)) { |
| struct object *object = parse_object(sha1); |
| object->flags |= UNINTERESTING; |
| add_pending_object(&revs, object, buffer); |
| } |
| } else if (!get_sha1_hex(buffer, sha1)) { |
| struct object *object = parse_object(sha1); |
| object->flags |= SHOWN; |
| } |
| } |
| fclose(rls_fout); |
| if (finish_command(&rls)) |
| return error("rev-list died"); |
| |
| /* write references */ |
| argc = setup_revisions(argc, argv, &revs, NULL); |
| |
| if (argc > 1) |
| return error("unrecognized argument: %s'", argv[1]); |
| |
| object_array_remove_duplicates(&revs.pending); |
| |
| for (i = 0; i < revs.pending.nr; i++) { |
| struct object_array_entry *e = revs.pending.objects + i; |
| unsigned char sha1[20]; |
| char *ref; |
| const char *display_ref; |
| int flag; |
| |
| if (e->item->flags & UNINTERESTING) |
| continue; |
| if (dwim_ref(e->name, strlen(e->name), sha1, &ref) != 1) |
| continue; |
| if (!resolve_ref(e->name, sha1, 1, &flag)) |
| flag = 0; |
| display_ref = (flag & REF_ISSYMREF) ? e->name : ref; |
| |
| if (e->item->type == OBJ_TAG && |
| !is_tag_in_date_range(e->item, &revs)) { |
| e->item->flags |= UNINTERESTING; |
| continue; |
| } |
| |
| /* |
| * Make sure the refs we wrote out is correct; --max-count and |
| * other limiting options could have prevented all the tips |
| * from getting output. |
| * |
| * Non commit objects such as tags and blobs do not have |
| * this issue as they are not affected by those extra |
| * constraints. |
| */ |
| if (!(e->item->flags & SHOWN) && e->item->type == OBJ_COMMIT) { |
| warning("ref '%s' is excluded by the rev-list options", |
| e->name); |
| free(ref); |
| continue; |
| } |
| /* |
| * If you run "git bundle create bndl v1.0..v2.0", the |
| * name of the positive ref is "v2.0" but that is the |
| * commit that is referenced by the tag, and not the tag |
| * itself. |
| */ |
| if (hashcmp(sha1, e->item->sha1)) { |
| /* |
| * Is this the positive end of a range expressed |
| * in terms of a tag (e.g. v2.0 from the range |
| * "v1.0..v2.0")? |
| */ |
| struct commit *one = lookup_commit_reference(sha1); |
| struct object *obj; |
| |
| if (e->item == &(one->object)) { |
| /* |
| * Need to include e->name as an |
| * independent ref to the pack-objects |
| * input, so that the tag is included |
| * in the output; otherwise we would |
| * end up triggering "empty bundle" |
| * error. |
| */ |
| obj = parse_object(sha1); |
| obj->flags |= SHOWN; |
| add_pending_object(&revs, obj, e->name); |
| } |
| free(ref); |
| continue; |
| } |
| |
| ref_count++; |
| write_or_die(bundle_fd, sha1_to_hex(e->item->sha1), 40); |
| write_or_die(bundle_fd, " ", 1); |
| write_or_die(bundle_fd, display_ref, strlen(display_ref)); |
| write_or_die(bundle_fd, "\n", 1); |
| free(ref); |
| } |
| if (!ref_count) |
| die ("Refusing to create empty bundle."); |
| |
| /* end header */ |
| write_or_die(bundle_fd, "\n", 1); |
| |
| /* write pack */ |
| argv_pack[0] = "pack-objects"; |
| argv_pack[1] = "--all-progress-implied"; |
| argv_pack[2] = "--stdout"; |
| argv_pack[3] = "--thin"; |
| argv_pack[4] = "--delta-base-offset"; |
| argv_pack[5] = NULL; |
| memset(&rls, 0, sizeof(rls)); |
| rls.argv = argv_pack; |
| rls.in = -1; |
| rls.out = bundle_fd; |
| rls.git_cmd = 1; |
| if (start_command(&rls)) |
| return error("Could not spawn pack-objects"); |
| |
| /* |
| * start_command closed bundle_fd if it was > 1 |
| * so set the lock fd to -1 so commit_lock_file() |
| * won't fail trying to close it. |
| */ |
| lock.fd = -1; |
| |
| for (i = 0; i < revs.pending.nr; i++) { |
| struct object *object = revs.pending.objects[i].item; |
| if (object->flags & UNINTERESTING) |
| write_or_die(rls.in, "^", 1); |
| write_or_die(rls.in, sha1_to_hex(object->sha1), 40); |
| write_or_die(rls.in, "\n", 1); |
| } |
| close(rls.in); |
| if (finish_command(&rls)) |
| return error ("pack-objects died"); |
| if (!bundle_to_stdout) { |
| if (commit_lock_file(&lock)) |
| die_errno("cannot create '%s'", path); |
| } |
| return 0; |
| } |
| |
| int unbundle(struct bundle_header *header, int bundle_fd) |
| { |
| const char *argv_index_pack[] = {"index-pack", |
| "--fix-thin", "--stdin", NULL}; |
| struct child_process ip; |
| |
| if (verify_bundle(header, 0)) |
| return -1; |
| memset(&ip, 0, sizeof(ip)); |
| ip.argv = argv_index_pack; |
| ip.in = bundle_fd; |
| ip.no_stdout = 1; |
| ip.git_cmd = 1; |
| if (run_command(&ip)) |
| return error("index-pack died"); |
| return 0; |
| } |