#include "builtin.h"
#include "cache.h"
-#include "object.h"
-#include "commit.h"
-#include "diff.h"
-#include "revision.h"
-#include "list-objects.h"
-#include "run-command.h"
-#include "refs.h"
+#include "bundle.h"
/*
* Basic handler for bundle files to connect repositories via sneakernet.
* Invocation must include action.
* This function can create a bundle or provide information on an existing
- * bundle supporting git-fetch, git-pull, and git-ls-remote
+ * bundle supporting "fetch", "pull", and "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_signature[] = "# v2 git bundle\n";
-
-struct ref_list {
- unsigned int nr, alloc;
- struct ref_list_entry {
- unsigned char sha1[20];
- char *name;
- } *list;
-};
-
-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++;
-}
-
-struct bundle_header {
- struct ref_list prerequisites;
- struct ref_list references;
-};
-
-/* returns an fd */
-static int read_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 (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)
-
-static 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"};
- 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 int list_heads(struct bundle_header *header, int argc, const char **argv)
-{
- return list_refs(&header->references, argc, argv);
-}
-
-static 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(5 * 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, 1);
-
- /* 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 = fdopen(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]);
-
- 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;
-
- /*
- * 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";
- argv_pack[2] = "--stdout";
- argv_pack[3] = "--thin";
- argv_pack[4] = 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");
- for (i = 0; i < revs.pending.nr; i++) {
- struct object *object = revs.pending.objects[i].item;
- if (object->flags & UNINTERESTING)
- write(rls.in, "^", 1);
- write(rls.in, sha1_to_hex(object->sha1), 40);
- write(rls.in, "\n", 1);
- }
- if (finish_command(&rls))
- return error ("pack-objects died");
- close(bundle_fd);
- if (!bundle_to_stdout)
- commit_lock_file(&lock);
- return 0;
-}
-
-static int unbundle(struct bundle_header *header, int bundle_fd,
- int argc, const char **argv)
-{
- 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 list_heads(header, argc, argv);
-}
+static const char *bundle_usage="git bundle (create <bundle> <git rev-list args> | verify <bundle> | list-heads <bundle> [refname]... | unbundle <bundle> [refname]... )";
int cmd_bundle(int argc, const char **argv, const char *prefix)
{
struct bundle_header header;
- int nongit = 0;
+ int nongit;
const char *cmd, *bundle_file;
int bundle_fd = -1;
char buffer[PATH_MAX];
}
memset(&header, 0, sizeof(header));
- if (strcmp(cmd, "create") &&
- (bundle_fd = read_header(bundle_file, &header)) < 0)
+ if (strcmp(cmd, "create") && (bundle_fd =
+ read_bundle_header(bundle_file, &header)) < 0)
return 1;
if (!strcmp(cmd, "verify")) {
}
if (!strcmp(cmd, "list-heads")) {
close(bundle_fd);
- return !!list_heads(&header, argc, argv);
+ return !!list_bundle_refs(&header, argc, argv);
}
if (!strcmp(cmd, "create")) {
if (nongit)
} else if (!strcmp(cmd, "unbundle")) {
if (nongit)
die("Need a repository to unbundle.");
- return !!unbundle(&header, bundle_fd, argc, argv);
+ return !!unbundle(&header, bundle_fd) ||
+ list_bundle_refs(&header, argc, argv);
} else
usage(bundle_usage);
}