+#include "builtin.h"
#include "cache.h"
-#include "object.h"
-#include "commit.h"
-#include "diff.h"
-#include "revision.h"
-#include "list-objects.h"
-#include "exec_cmd.h"
+#include "bundle.h"
/*
* Basic handler for bundle files to connect repositories via sneakernet.
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;
-};
-
-/* this function returns the length of the string */
-static int read_string(int fd, char *buffer, int size)
-{
- int i;
- for (i = 0; i < size - 1; i++) {
- int count = xread(fd, buffer + i, 1);
- if (count < 0)
- return error("Read error: %s", strerror(errno));
- if (count == 0) {
- i--;
- break;
- }
- if (buffer[i] == '\n')
- break;
- }
- buffer[i + 1] = '\0';
- return i + 1;
-}
-
-/* returns an fd */
-static int read_header(const char *path, struct bundle_header *header) {
- char buffer[1024];
- int fd = open(path, O_RDONLY);
-
- if (fd < 0)
- return error("could not open '%s'", path);
- if (read_string(fd, buffer, sizeof(buffer)) < 0 ||
- strcmp(buffer, bundle_signature)) {
- close(fd);
- return error("'%s' does not look like a v2 bundle file", path);
- }
- while (read_string(fd, buffer, sizeof(buffer)) > 0
- && 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)) {
- 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;
-}
-
-/* if in && *in >= 0, take that as input file descriptor instead */
-static int fork_with_pipe(const char **argv, int *in, int *out)
-{
- int needs_in, needs_out;
- int fdin[2], fdout[2], pid;
-
- needs_in = in && *in < 0;
- if (needs_in) {
- if (pipe(fdin) < 0)
- return error("could not setup pipe");
- *in = fdin[1];
- }
-
- needs_out = out && *out < 0;
- if (needs_out) {
- if (pipe(fdout) < 0)
- return error("could not setup pipe");
- *out = fdout[0];
- }
-
- if ((pid = fork()) < 0) {
- if (needs_in) {
- close(fdin[0]);
- close(fdin[1]);
- }
- if (needs_out) {
- close(fdout[0]);
- close(fdout[1]);
- }
- return error("could not fork");
- }
- if (!pid) {
- if (needs_in) {
- dup2(fdin[0], 0);
- close(fdin[0]);
- close(fdin[1]);
- } else if (in) {
- dup2(*in, 0);
- close(*in);
- }
- if (needs_out) {
- dup2(fdout[1], 1);
- close(fdout[0]);
- close(fdout[1]);
- } 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 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 void show_commit(struct commit *commit)
-{
- write_or_die(1, sha1_to_hex(commit->object.sha1), 40);
- write_or_die(1, "\n", 1);
- if (commit->parents) {
- free_commit_list(commit->parents);
- commit->parents = NULL;
- }
-}
-
-static void show_object(struct object_array_entry *p)
-{
- /* 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_or_die(1, sha1_to_hex(p->item->sha1), 40);
- write_or_die(1, " ", 1);
- if (len)
- write_or_die(1, p->name, len);
- write_or_die(1, "\n", 1);
-}
-
-static void show_edge(struct commit *commit)
-{
- ; /* nothing to do */
-}
-
-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 + 4) * sizeof(const char *));
- const char **argv_pack = xmalloc(4 * sizeof(const char *));
- int pid, in, out, i, status;
- char buffer[1024];
- struct rev_info revs;
- struct object_array tips;
-
- bundle_fd = (!strcmp(path, "-") ? 1 :
- open(path, O_CREAT | O_WRONLY, 0666));
- if (bundle_fd < 0)
- return error("Could not write to '%s'", path);
-
- /* write signature */
- write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature));
-
- /* 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;
- 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_or_die(bundle_fd, buffer, i);
- while ((i = waitpid(pid, &status, 0)) < 0)
- if (errno != EINTR)
- return error("rev-list died");
- if (!WIFEXITED(status) || WEXITSTATUS(status))
- 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]);
-
- memset(&tips, 0, sizeof(tips));
- for (i = 0; i < revs.pending.nr; i++) {
- struct object_array_entry *e = revs.pending.objects + i;
- unsigned char sha1[20];
- char *ref;
-
- if (e->item->flags & UNINTERESTING)
- continue;
- if (dwim_ref(e->name, strlen(e->name), sha1, &ref) != 1)
- continue;
- 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);
- add_object_array(e->item, e->name, &tips);
- free(ref);
- }
-
- /* 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] = 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);
- dup2(in, 1);
- close(in);
- prepare_revision_walk(&revs);
- mark_edges_uninteresting(revs.commits, &revs, show_edge);
- 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");
-
- /*
- * Make sure the refs we wrote out is correct; --max-count and
- * other limiting options could have prevented all the tips
- * from getting output.
- */
- status = 0;
- for (i = 0; i < tips.nr; i++) {
- if (!(tips.objects[i].item->flags & SHOWN)) {
- status = 1;
- error("%s: not included in the resulting pack",
- tips.objects[i].name);
- }
- }
-
- 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};
- int pid, status, dev_null;
-
- if (verify_bundle(header, 0))
- return -1;
- dev_null = open("/dev/null", O_WRONLY);
- pid = fork_with_pipe(argv_index_pack, &bundle_fd, &dev_null);
- if (pid < 0)
- return error("Could not spawn index-pack");
- while (waitpid(pid, &status, 0) < 0)
- if (errno != EINTR)
- return error("index-pack died");
- if (!WIFEXITED(status) || WEXITSTATUS(status))
- return error("index-pack exited with status %d",
- WEXITSTATUS(status));
- return list_heads(header, argc, argv);
-}
-
int cmd_bundle(int argc, const char **argv, const char *prefix)
{
struct bundle_header header;
}
memset(&header, 0, sizeof(header));
- if (strcmp(cmd, "create") &&
- !(bundle_fd = read_header(bundle_file, &header)))
+ 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);
}