#include "pkt-line.h"
#include <sys/wait.h>
-static const char clone_pack_usage[] = "git-clone-pack [host:]directory [heads]*";
+static const char clone_pack_usage[] =
+"git-clone-pack [--exec=<git-upload-pack>] [<host>:]<directory> [<heads>]*";
static const char *exec = "git-upload-pack";
-struct ref {
- struct ref *next;
- unsigned char sha1[20];
- char name[0];
-};
-
-struct ref *get_remote_refs(int fd, int nr_match, char **match)
-{
- struct ref *ref_list = NULL, **next_ref = &ref_list;
-
- for (;;) {
- static char line[1000];
- unsigned char sha1[20];
- struct ref *ref;
- char *refname;
- int len;
-
- len = packet_read_line(fd, line, sizeof(line));
- if (!len)
- break;
- if (line[len-1] == '\n')
- line[--len] = 0;
- if (len < 42 || get_sha1_hex(line, sha1))
- die("git-fetch-pack: protocol error - expected ref descriptor, got '%s¤'", line);
- refname = line+41;
- len = len-40;
- if (nr_match && !path_match(refname, nr_match, match))
- continue;
- ref = xmalloc(sizeof(struct ref) + len);
- ref->next = NULL;
- memcpy(ref->sha1, sha1, 20);
- memcpy(ref->name, refname, len);
- *next_ref = ref;
- next_ref = &ref->next;
- }
- return ref_list;
-}
-
static void clone_handshake(int fd[2], struct ref *ref)
{
unsigned char sha1[20];
while (ref) {
- packet_write(fd[1], "want %s\n", sha1_to_hex(ref->sha1));
+ packet_write(fd[1], "want %s\n", sha1_to_hex(ref->old_sha1));
ref = ref->next;
}
packet_flush(fd[1]);
static void write_one_ref(struct ref *ref)
{
- char *path = git_path(ref->name);
+ char *path = git_path("%s", ref->name);
int fd;
char *hex;
+ if (!strncmp(ref->name, "refs/", 5) &&
+ check_ref_format(ref->name + 5)) {
+ error("refusing to create funny ref '%s' locally", ref->name);
+ return;
+ }
+
if (safe_create_leading_directories(path))
die("unable to create leading directory for %s", ref->name);
fd = open(path, O_CREAT | O_EXCL | O_WRONLY, 0666);
if (fd < 0)
die("unable to create ref %s", ref->name);
- hex = sha1_to_hex(ref->sha1);
+ hex = sha1_to_hex(ref->old_sha1);
hex[40] = '\n';
if (write(fd, hex, 41) != 41)
die("unable to write ref %s", ref->name);
struct ref *head = NULL, *head_ptr, *master_ref;
char *head_path;
+ /* Upload-pack must report HEAD first */
if (!strcmp(ref->name, "HEAD")) {
head = ref;
ref = ref->next;
while (ref) {
if (is_master(ref))
master_ref = ref;
- if (head && !memcmp(ref->sha1, head->sha1, 20)) {
- if (!head_ptr || ref == master_ref)
- head_ptr = ref;
- }
+ if (head &&
+ !memcmp(ref->old_sha1, head->old_sha1, 20) &&
+ !strncmp(ref->name, "refs/heads/",11) &&
+ (!head_ptr || ref == master_ref))
+ head_ptr = ref;
+
write_one_ref(ref);
ref = ref->next;
}
- if (!head)
+ if (!head) {
+ fprintf(stderr, "No HEAD in remote.\n");
return;
+ }
- head_path = git_path("HEAD");
+ head_path = strdup(git_path("HEAD"));
if (!head_ptr) {
/*
* If we had a master ref, and it wasn't HEAD, we need to undo the
unlink(head_path);
}
write_one_ref(head);
+ free(head_path);
return;
}
if (master_ref)
return;
+ fprintf(stderr, "Setting HEAD to %s\n", head_ptr->name);
+
/*
* Uhhuh. Other end didn't have master. We start HEAD off with
* the first branch with the same value.
*/
- unlink(head_path);
- if (symlink(head_ptr->name, head_path) < 0)
+ if (create_symref(head_path, head_ptr->name) < 0)
die("unable to link HEAD to %s", head_ptr->name);
+ free(head_path);
+}
+
+static int finish_pack(const char *pack_tmp_name)
+{
+ int pipe_fd[2];
+ pid_t pid;
+ char idx[PATH_MAX];
+ char final[PATH_MAX];
+ char hash[41];
+ unsigned char sha1[20];
+ char *cp;
+ int err = 0;
+
+ if (pipe(pipe_fd) < 0)
+ die("git-clone-pack: unable to set up pipe");
+
+ strcpy(idx, pack_tmp_name); /* ".git/objects/pack-XXXXXX" */
+ cp = strrchr(idx, '/');
+ memcpy(cp, "/pidx", 5);
+
+ pid = fork();
+ if (pid < 0)
+ die("git-clone-pack: unable to fork off git-index-pack");
+ if (!pid) {
+ close(0);
+ dup2(pipe_fd[1], 1);
+ close(pipe_fd[0]);
+ close(pipe_fd[1]);
+ execlp("git-index-pack","git-index-pack",
+ "-o", idx, pack_tmp_name, NULL);
+ error("cannot exec git-index-pack <%s> <%s>",
+ idx, pack_tmp_name);
+ exit(1);
+ }
+ close(pipe_fd[1]);
+ if (read(pipe_fd[0], hash, 40) != 40) {
+ error("git-clone-pack: unable to read from git-index-pack");
+ err = 1;
+ }
+ close(pipe_fd[0]);
+
+ for (;;) {
+ int status, code;
+ int retval = waitpid(pid, &status, 0);
+
+ if (retval < 0) {
+ if (errno == EINTR)
+ continue;
+ error("waitpid failed (%s)", strerror(retval));
+ goto error_die;
+ }
+ if (WIFSIGNALED(status)) {
+ int sig = WTERMSIG(status);
+ error("git-index-pack died of signal %d", sig);
+ goto error_die;
+ }
+ if (!WIFEXITED(status)) {
+ error("git-index-pack died of unnatural causes %d",
+ status);
+ goto error_die;
+ }
+ code = WEXITSTATUS(status);
+ if (code) {
+ error("git-index-pack died with error code %d", code);
+ goto error_die;
+ }
+ if (err)
+ goto error_die;
+ break;
+ }
+ hash[40] = 0;
+ if (get_sha1_hex(hash, sha1)) {
+ error("git-index-pack reported nonsense '%s'", hash);
+ goto error_die;
+ }
+ /* Now we have pack in pack_tmp_name[], and
+ * idx in idx[]; rename them to their final names.
+ */
+ snprintf(final, sizeof(final),
+ "%s/pack/pack-%s.pack", get_object_directory(), hash);
+ move_temp_to_file(pack_tmp_name, final);
+ chmod(final, 0444);
+ snprintf(final, sizeof(final),
+ "%s/pack/pack-%s.idx", get_object_directory(), hash);
+ move_temp_to_file(idx, final);
+ chmod(final, 0444);
+ return 0;
+
+ error_die:
+ unlink(idx);
+ unlink(pack_tmp_name);
+ exit(1);
+}
+
+static int clone_without_unpack(int fd[2])
+{
+ char tmpfile[PATH_MAX];
+ int ofd, ifd;
+
+ ifd = fd[0];
+ snprintf(tmpfile, sizeof(tmpfile),
+ "%s/pack/tmp-XXXXXX", get_object_directory());
+ ofd = mkstemp(tmpfile);
+ if (ofd < 0)
+ return error("unable to create temporary file %s", tmpfile);
+
+ while (1) {
+ char buf[8192];
+ ssize_t sz, wsz, pos;
+ sz = read(ifd, buf, sizeof(buf));
+ if (sz == 0)
+ break;
+ if (sz < 0) {
+ error("error reading pack (%s)", strerror(errno));
+ close(ofd);
+ unlink(tmpfile);
+ return -1;
+ }
+ pos = 0;
+ while (pos < sz) {
+ wsz = write(ofd, buf + pos, sz - pos);
+ if (wsz < 0) {
+ error("error writing pack (%s)",
+ strerror(errno));
+ close(ofd);
+ unlink(tmpfile);
+ return -1;
+ }
+ pos += wsz;
+ }
+ }
+ close(ofd);
+ return finish_pack(tmpfile);
}
static int clone_pack(int fd[2], int nr_match, char **match)
{
struct ref *refs;
int status;
- pid_t pid;
- refs = get_remote_refs(fd[0], nr_match, match);
+ get_remote_heads(fd[0], &refs, nr_match, match, 1);
if (!refs) {
packet_flush(fd[1]);
die("no matching remote head");
}
clone_handshake(fd, refs);
- pid = fork();
- if (pid < 0)
- die("git-clone-pack: unable to fork off git-unpack-objects");
- if (!pid) {
- close(fd[1]);
- dup2(fd[0], 0);
- close(fd[0]);
- execlp("git-unpack-objects", "git-unpack-objects", NULL);
- die("git-unpack-objects exec failed");
- }
- close(fd[0]);
- close(fd[1]);
- while (waitpid(pid, &status, 0) < 0) {
- if (errno != EINTR)
- die("waiting for git-unpack-objects: %s", strerror(errno));
- }
- if (WIFEXITED(status)) {
- int code = WEXITSTATUS(status);
- if (code)
- die("git-unpack-objects died with error code %d", code);
+
+ status = clone_without_unpack(fd);
+
+ if (!status)
write_refs(refs);
- return 0;
- }
- if (WIFSIGNALED(status)) {
- int sig = WTERMSIG(status);
- die("git-unpack-objects died of signal %d", sig);
- }
- die("Sherlock Holmes! git-unpack-objects died of unnatural causes %d!", status);
+ return status;
}
int main(int argc, char **argv)
char *arg = argv[i];
if (*arg == '-') {
- /* Arguments go here */
+ if (!strcmp("-q", arg))
+ continue;
+ if (!strncmp("--exec=", arg, 7)) {
+ exec = arg + 7;
+ continue;
+ }
+ if (!strcmp("--keep", arg))
+ continue;
usage(clone_pack_usage);
}
dest = arg;