* bundle supporting git-fetch, git-pull, and git-ls-remote
*/
-static const char *bundle_usage="git-bundle (--create <bundle> <git-rev-list args> | --verify <bundle> | --list-heads <bundle> [refname]... | --unbundle <bundle> [refname]... )";
+static const char *bundle_usage="git-bundle (create <bundle> <git-rev-list args> | verify <bundle> | list-heads <bundle> [refname]... | unbundle <bundle> [refname]... )";
static const char bundle_signature[] = "# v2 git bundle\n";
struct ref_list {
unsigned int nr, alloc;
- struct {
+ struct ref_list_entry {
unsigned char sha1[20];
char *name;
} *list;
}
struct bundle_header {
- struct ref_list prerequisites, references;
+ struct ref_list prerequisites;
+ struct ref_list references;
};
/* this function returns the length of the string */
{
int i;
for (i = 0; i < size - 1; i++) {
- int count = read(fd, buffer + i, 1);
+ int count = xread(fd, buffer + i, 1);
if (count < 0)
return error("Read error: %s", strerror(errno));
if (count == 0) {
}
while (read_string(fd, buffer, sizeof(buffer)) > 0
&& buffer[0] != '\n') {
- int offset = buffer[0] == '-' ? 1 : 0;
+ int is_prereq = buffer[0] == '-';
+ int offset = is_prereq ? 1 : 0;
int len = strlen(buffer);
unsigned char sha1[20];
- struct ref_list *list = offset ? &header->prerequisites
+ struct ref_list *list = is_prereq ? &header->prerequisites
: &header->references;
- if (get_sha1_hex(buffer + offset, sha1)) {
- close(fd);
- return error("invalid SHA1: %s", buffer);
- }
+ char delim;
+
if (buffer[len - 1] == '\n')
buffer[len - 1] = '\0';
- add_to_ref_list(sha1, buffer + 41 + offset, list);
+ if (get_sha1_hex(buffer + offset, sha1)) {
+ warn("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);
}
return fd;
}
dup2(fdin[0], 0);
close(fdin[0]);
close(fdin[1]);
- } else if (in)
+ } else if (in) {
dup2(*in, 0);
+ close(*in);
+ }
if (needs_out) {
dup2(fdout[1], 1);
close(fdout[0]);
close(fdout[1]);
- } else if (out)
+ } else if (out) {
dup2(*out, 1);
+ close(*out);
+ }
exit(execv_git_cmd(argv));
}
if (needs_in)
close(fdin[0]);
+ else if (in)
+ close(*in);
if (needs_out)
close(fdout[1]);
+ else if (out)
+ close(*out);
return pid;
}
-static int verify_bundle(struct bundle_header *header)
-{
- /*
- * 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;
- const char *argv[5] = {"rev-list", "--stdin", "--not", "--all", NULL};
- int pid, in, out, i, ret = 0;
- char buffer[1024];
-
- in = out = -1;
- pid = fork_with_pipe(argv, &in, &out);
- if (pid < 0)
- return error("Could not fork rev-list");
- if (!fork()) {
- for (i = 0; i < p->nr; i++) {
- write(in, sha1_to_hex(p->list[i].sha1), 40);
- write(in, "\n", 1);
- }
- close(in);
- exit(0);
- }
- close(in);
- while (read_string(out, buffer, sizeof(buffer)) > 0) {
- if (ret++ == 0)
- error ("The bundle requires the following commits you lack:");
- fprintf(stderr, "%s", buffer);
- }
- close(out);
- while (waitpid(pid, &i, 0) < 0)
- if (errno != EINTR)
- return -1;
- if (!ret && (!WIFEXITED(i) || WEXITSTATUS(i)))
- return error("At least one prerequisite is lacking.");
-
- return ret;
-}
-
-static int list_heads(struct bundle_header *header, int argc, const char **argv)
+static int list_refs(struct ref_list *r, int argc, const char **argv)
{
int i;
- struct ref_list *r = &header->references;
for (i = 0; i < r->nr; i++) {
if (argc > 1) {
return 0;
}
-static void show_commit(struct commit *commit)
+#define PREREQ_MARK (1u<<16)
+
+static int verify_bundle(struct bundle_header *header, int verbose)
{
- write(1, sha1_to_hex(commit->object.sha1), 40);
- write(1, "\n", 1);
- if (commit->parents) {
- free_commit_list(commit->parents);
- commit->parents = NULL;
+ /*
+ * 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"};
+ 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(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);
+ }
+
+ prepare_revision_walk(&revs);
+
+ 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(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;
}
-static void show_object(struct object_array_entry *p)
+static int list_heads(struct bundle_header *header, int argc, const char **argv)
{
- /* An object with name "foo\n0000000..." can be used to
- * * confuse downstream git-pack-objects very badly.
- * */
- const char *ep = strchr(p->name, '\n');
- int len = ep ? ep - p->name : strlen(p->name);
- write(1, sha1_to_hex(p->item->sha1), 40);
- write(1, " ", 1);
- if (len)
- write(1, p->name, len);
- write(1, "\n", 1);
+ return list_refs(&header->references, argc, argv);
}
static int create_bundle(struct bundle_header *header, const char *path,
int argc, const char **argv)
{
int bundle_fd = -1;
- const char **argv_boundary = xmalloc((argc + 3) * sizeof(const char *));
- const char **argv_pack = xmalloc(4 * sizeof(const char *));
- int pid, in, out, i, status;
+ const char **argv_boundary = xmalloc((argc + 4) * sizeof(const char *));
+ const char **argv_pack = xmalloc(5 * sizeof(const char *));
+ int pid, in, out, i, status, ref_count = 0;
char buffer[1024];
struct rev_info revs;
bundle_fd = (!strcmp(path, "-") ? 1 :
- open(path, O_CREAT | O_WRONLY, 0666));
+ open(path, O_CREAT | O_EXCL | O_WRONLY, 0666));
if (bundle_fd < 0)
- return error("Could not write to '%s'", path);
+ return error("Could not create '%s': %s", path, strerror(errno));
/* write signature */
- write(bundle_fd, bundle_signature, strlen(bundle_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 + 2, argv + 1, argc * sizeof(const char *));
+ memcpy(argv_boundary + 3, argv + 1, argc * sizeof(const char *));
argv_boundary[0] = "rev-list";
argv_boundary[1] = "--boundary";
- argv_boundary[argc + 1] = NULL;
+ argv_boundary[2] = "--pretty=oneline";
+ argv_boundary[argc + 2] = NULL;
out = -1;
pid = fork_with_pipe(argv_boundary, NULL, &out);
if (pid < 0)
return -1;
- while ((i = read_string(out, buffer, sizeof(buffer))) > 0)
- if (buffer[0] == '-')
- write(bundle_fd, buffer, i);
+ while ((i = read_string(out, buffer, sizeof(buffer))) > 0) {
+ unsigned char sha1[20];
+ if (buffer[0] == '-') {
+ write_or_die(bundle_fd, buffer, i);
+ 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;
+ }
+ }
while ((i = waitpid(pid, &status, 0)) < 0)
if (errno != EINTR)
return error("rev-list died");
return error("rev-list died %d", WEXITSTATUS(status));
/* write references */
- save_commit_buffer = 0;
- init_revisions(&revs, NULL);
- revs.tag_objects = 1;
- revs.tree_objects = 1;
- revs.blob_objects = 1;
argc = setup_revisions(argc, argv, &revs, NULL);
if (argc > 1)
return error("unrecognized argument: %s'", argv[1]);
+
for (i = 0; i < revs.pending.nr; i++) {
struct object_array_entry *e = revs.pending.objects + i;
- if (!(e->item->flags & UNINTERESTING)) {
- unsigned char sha1[20];
- char *ref;
- if (dwim_ref(e->name, strlen(e->name), sha1, &ref) != 1)
- continue;
- write(bundle_fd, sha1_to_hex(e->item->sha1), 40);
- write(bundle_fd, " ", 1);
- write(bundle_fd, ref, strlen(ref));
- write(bundle_fd, "\n", 1);
- free(ref);
+ unsigned char sha1[20];
+ char *ref;
+
+ if (e->item->flags & UNINTERESTING)
+ continue;
+ if (dwim_ref(e->name, strlen(e->name), sha1, &ref) != 1)
+ 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.
+ */
+ if (!(e->item->flags & SHOWN)) {
+ warn("ref '%s' is excluded by the rev-list options",
+ e->name);
+ 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, ref, strlen(ref));
+ write_or_die(bundle_fd, "\n", 1);
+ free(ref);
}
+ if (!ref_count)
+ die ("Refusing to create empty bundle.");
/* end header */
- write(bundle_fd, "\n", 1);
+ write_or_die(bundle_fd, "\n", 1);
/* write pack */
argv_pack[0] = "pack-objects";
argv_pack[1] = "--all-progress";
argv_pack[2] = "--stdout";
- argv_pack[3] = NULL;
+ argv_pack[3] = "--thin";
+ argv_pack[4] = NULL;
in = -1;
out = bundle_fd;
pid = fork_with_pipe(argv_pack, &in, &out);
if (pid < 0)
return error("Could not spawn pack-objects");
- close(1);
- close(bundle_fd);
- dup2(in, 1);
+ for (i = 0; i < revs.pending.nr; i++) {
+ struct object *object = revs.pending.objects[i].item;
+ if (object->flags & UNINTERESTING)
+ write(in, "^", 1);
+ write(in, sha1_to_hex(object->sha1), 40);
+ write(in, "\n", 1);
+ }
close(in);
- prepare_revision_walk(&revs);
- traverse_commit_list(&revs, show_commit, show_object);
- close(1);
while (waitpid(pid, &status, 0) < 0)
if (errno != EINTR)
return -1;
if (!WIFEXITED(status) || WEXITSTATUS(status))
return error ("pack-objects died");
- return 0;
+
+ return status;
}
static int unbundle(struct bundle_header *header, int bundle_fd,
int argc, const char **argv)
{
- const char *argv_index_pack[] = {"index-pack", "--stdin", NULL};
+ const char *argv_index_pack[] = {"index-pack",
+ "--fix-thin", "--stdin", NULL};
int pid, status, dev_null;
- if (verify_bundle(header))
+ if (verify_bundle(header, 0))
return -1;
dev_null = open("/dev/null", O_WRONLY);
+ if (dev_null < 0)
+ return error("Could not open /dev/null");
pid = fork_with_pipe(argv_index_pack, &bundle_fd, &dev_null);
if (pid < 0)
return error("Could not spawn index-pack");
- close(bundle_fd);
while (waitpid(pid, &status, 0) < 0)
if (errno != EINTR)
return error("index-pack died");
memset(&header, 0, sizeof(header));
if (strcmp(cmd, "create") &&
- !(bundle_fd = read_header(bundle_file, &header)))
+ (bundle_fd = read_header(bundle_file, &header)) < 0)
return 1;
if (!strcmp(cmd, "verify")) {
close(bundle_fd);
- if (verify_bundle(&header))
+ if (verify_bundle(&header, 1))
return 1;
fprintf(stderr, "%s is okay\n", bundle_file);
return 0;
} else
usage(bundle_usage);
}
-