X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=builtin-bundle.c;h=306ad29597dbf9002a44ba509c2e9d7a737b159d;hb=240ba7f235c9b946678bd6d34826fb73ea8fd90e;hp=4bd596ab26c5159e845e68dd9e74a2d9a1b2c74f;hpb=2e0afafebd8c5a1a8cdddb0714073461229ecfef;p=git.git

diff --git a/builtin-bundle.c b/builtin-bundle.c
index 4bd596ab2..306ad2959 100644
--- a/builtin-bundle.c
+++ b/builtin-bundle.c
@@ -4,7 +4,7 @@
 #include "diff.h"
 #include "revision.h"
 #include "list-objects.h"
-#include "exec_cmd.h"
+#include "run-command.h"
 
 /*
  * Basic handler for bundle files to connect repositories via sneakernet.
@@ -13,13 +13,13 @@
  * 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;
@@ -39,7 +39,8 @@ static void add_to_ref_list(const unsigned char *sha1, const char *name,
 }
 
 struct bundle_header {
-	struct ref_list prerequisites, references;
+	struct ref_list prerequisites;
+	struct ref_list references;
 };
 
 /* this function returns the length of the string */
@@ -47,7 +48,7 @@ static int read_string(int fd, char *buffer, int size)
 {
 	int i;
 	for (i = 0; i < size - 1; i++) {
-		int count = read(fd, buffer + i, 1);
+		ssize_t count = xread(fd, buffer + i, 1);
 		if (count < 0)
 			return error("Read error: %s", strerror(errno));
 		if (count == 0) {
@@ -75,242 +76,236 @@ static int read_header(const char *path, struct bundle_header *header) {
 	}
 	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)) {
+			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);
 	}
 	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)
+static int list_refs(struct ref_list *r, int argc, const char **argv)
 {
-	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];
-	}
+	int i;
 
-	if ((pid = fork()) < 0) {
-		if (needs_in) {
-			close(fdin[0]);
-			close(fdin[1]);
-		}
-		if (needs_out) {
-			close(fdout[0]);
-			close(fdout[1]);
+	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;
 		}
-		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);
-		if (needs_out) {
-			dup2(fdout[1], 1);
-			close(fdout[0]);
-			close(fdout[1]);
-		} else if (out)
-			dup2(*out, 1);
-		exit(execv_git_cmd(argv));
+		printf("%s %s\n", sha1_to_hex(r->list[i].sha1),
+				r->list[i].name);
 	}
-	if (needs_in)
-		close(fdin[0]);
-	if (needs_out)
-		close(fdout[1]);
-	return pid;
+	return 0;
 }
 
-static int verify_bundle(struct bundle_header *header)
+#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;
-	const char *argv[5] = {"rev-list", "--stdin", "--not", "--all", NULL};
-	int pid, in, out, i, ret = 0;
-	char buffer[1024];
+	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:";
 
-	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);
+	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;
 		}
-		close(in);
-		exit(0);
+		if (++ret == 1)
+			error(message);
+		error("%s %s", sha1_to_hex(e->sha1), e->name);
 	}
-	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);
+	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);
 	}
-	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;
-}
+	prepare_revision_walk(&revs);
 
-static int list_heads(struct bundle_header *header, int argc, const char **argv)
-{
-	int i;
-	struct ref_list *r = &header->references;
+	i = req_nr;
+	while (i && (commit = get_revision(&revs)))
+		if (commit->object.flags & PREREQ_MARK)
+			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;
+	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);
 		}
-		printf("%s %s\n", sha1_to_hex(r->list[i].sha1),
-				r->list[i].name);
-	}
-	return 0;
-}
 
-static void show_commit(struct commit *commit)
-{
-	write(1, sha1_to_hex(commit->object.sha1), 40);
-	write(1, "\n", 1);
-	if (commit->parents) {
-		free_commit_list(commit->parents);
-		commit->parents = NULL;
+	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 i, ref_count = 0;
 	char buffer[1024];
 	struct rev_info revs;
+	struct child_process rls;
 
 	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;
-	out = -1;
-	pid = fork_with_pipe(argv_boundary, NULL, &out);
-	if (pid < 0)
+	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;
-	while ((i = read_string(out, buffer, sizeof(buffer))) > 0)
-		if (buffer[0] == '-')
-			write(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));
+	while ((i = read_string(rls.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;
+		}
+	}
+	if (finish_command(&rls))
+		return error("rev-list died");
 
 	/* 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)) {
+			warning("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;
-	in = -1;
-	out = bundle_fd;
-	pid = fork_with_pipe(argv_pack, &in, &out);
-	if (pid < 0)
+	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");
-	close(1);
-	close(bundle_fd);
-	dup2(in, 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))
+	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");
 	return 0;
 }
@@ -318,22 +313,19 @@ static int create_bundle(struct bundle_header *header, const char *path,
 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;
+	const char *argv_index_pack[] = {"index-pack",
+		"--fix-thin", "--stdin", NULL};
+	struct child_process ip;
 
-	if (verify_bundle(header))
+	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");
-	close(bundle_fd);
-	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));
+	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);
 }
 
@@ -361,12 +353,12 @@ int cmd_bundle(int argc, const char **argv, const char *prefix)
 
 	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;
@@ -386,4 +378,3 @@ int cmd_bundle(int argc, const char **argv, const char *prefix)
 	} else
 		usage(bundle_usage);
 }
-