X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=clone-pack.c;h=960921903eaa712523af0b03098970127729f363;hb=3dd94e3b2e2f5b00512273f96ab5628c742c112c;hp=e9c20dee71ac18cdc4ff06d78e5a9345a347914d;hpb=638ccfdf0eeabf3d985426308b2a82db6207ae28;p=git.git

diff --git a/clone-pack.c b/clone-pack.c
index e9c20dee..96092190 100644
--- a/clone-pack.c
+++ b/clone-pack.c
@@ -3,8 +3,8 @@
 #include "pkt-line.h"
 #include <sys/wait.h>
 
-static int quiet;
-static const char clone_pack_usage[] = "git-clone-pack [-q] [--exec=<git-upload-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";
 
 static void clone_handshake(int fd[2], struct ref *ref)
@@ -30,10 +30,16 @@ static int is_master(struct ref *ref)
 
 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);
@@ -51,6 +57,7 @@ static void write_refs(struct ref *ref)
 	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;
@@ -60,17 +67,21 @@ static void write_refs(struct ref *ref)
 	while (ref) {
 		if (is_master(ref))
 			master_ref = ref;
-		if (head && !memcmp(ref->old_sha1, head->old_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
@@ -82,6 +93,7 @@ static void write_refs(struct ref *ref)
 			unlink(head_path);
 		}
 		write_one_ref(head);
+		free(head_path);
 		return;
 	}
 
@@ -89,56 +101,167 @@ static void write_refs(struct ref *ref)
 	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;
 
-	get_remote_heads(fd[0], &refs, 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) {
-		dup2(fd[0], 0);
-		close(fd[0]);
-		close(fd[1]);
-		execlp("git-unpack-objects", "git-unpack-objects",
-			quiet ? "-q" : NULL, 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)
@@ -154,14 +277,14 @@ int main(int argc, char **argv)
 		char *arg = argv[i];
 
 		if (*arg == '-') {
-			if (!strcmp("-q", arg)) {
-				quiet = 1;
+			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;