Move bundle specific stuff into bundle.[ch]

The transport specific stuff was moved into libgit.a, and the
bundle specific stuff will not be left behind.

This is a big code move, with one exception: the function
unbundle() no longer outputs the list of refs.  You have to call
list_bundle_refs() yourself for that.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 6 insertions, 359 deletions

diff --git a/builtin-bundle.c b/builtin-bundle.c
index 1b650069c9..9f38e2176a 100644
--- a/builtin-bundle.c
+++ b/builtin-bundle.c
@@ -1,11 +1,6 @@
 #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 "bundle.h"
 
 /*
  * Basic handler for bundle files to connect repositories via sneakernet.
@@ -16,355 +11,6 @@
 
 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;
-
-		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.
-		 *
-		 * 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, ref, strlen(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);
-}
-
 int cmd_bundle(int argc, const char **argv, const char *prefix)
 {
 	struct bundle_header header;
@@ -388,8 +34,8 @@ 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)) < 0)
+	if (strcmp(cmd, "create") && (bundle_fd =
+				read_bundle_header(bundle_file, &header)) < 0)
 		return 1;
 
 	if (!strcmp(cmd, "verify")) {
@@ -401,7 +47,7 @@ int cmd_bundle(int argc, const char **argv, const char *prefix)
 	}
 	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)
@@ -410,7 +56,8 @@ int cmd_bundle(int argc, const char **argv, const char *prefix)
 	} 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);
 }