[thirdparty/git.git] / builtin-mv.c

/*
 * "git mv" builtin command
 *
 * Copyright (C) 2006 Johannes Schindelin
 */
#include <fnmatch.h>

#include "cache.h"
#include "builtin.h"
#include "dir.h"
#include "cache-tree.h"
#include "path-list.h"

static const char builtin_mv_usage[] =
"git-mv [-n] [-f] (<source> <destination> | [-k] <source>... <destination>)";

static const char **copy_pathspec(const char *prefix, const char **pathspec,
				  int count, int base_name)
{
	const char **result = xmalloc((count + 1) * sizeof(const char *));
	memcpy(result, pathspec, count * sizeof(const char *));
	result[count] = NULL;
	if (base_name) {
		int i;
		for (i = 0; i < count; i++) {
			const char *last_slash = strrchr(result[i], '/');
			if (last_slash)
				result[i] = last_slash + 1;
		}
	}
	return get_pathspec(prefix, result);
}

static void show_list(const char *label, struct path_list *list)
{
	if (list->nr > 0) {
		int i;
		printf("%s", label);
		for (i = 0; i < list->nr; i++)
			printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
		putchar('\n');
	}
}

static const char *add_slash(const char *path)
{
	int len = strlen(path);
	if (path[len - 1] != '/') {
		char *with_slash = xmalloc(len + 2);
		memcpy(with_slash, path, len);
		strcat(with_slash + len, "/");
		return with_slash;
	}
	return path;
}

static struct lock_file lock_file;

int cmd_mv(int argc, const char **argv, const char *prefix)
{
	int i, newfd, count;
	int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
	const char **source, **destination, **dest_path;
	enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
	struct stat st;
	struct path_list overwritten = {NULL, 0, 0, 0};
	struct path_list src_for_dst = {NULL, 0, 0, 0};
	struct path_list added = {NULL, 0, 0, 0};
	struct path_list deleted = {NULL, 0, 0, 0};
	struct path_list changed = {NULL, 0, 0, 0};

	git_config(git_default_config);

	newfd = hold_lock_file_for_update(&lock_file, get_index_file());
	if (newfd < 0)
		die("unable to create new index file");

	if (read_cache() < 0)
		die("index file corrupt");

	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];

		if (arg[0] != '-')
			break;
		if (!strcmp(arg, "--")) {
			i++;
			break;
		}
		if (!strcmp(arg, "-n")) {
			show_only = 1;
			continue;
		}
		if (!strcmp(arg, "-f")) {
			force = 1;
			continue;
		}
		if (!strcmp(arg, "-k")) {
			ignore_errors = 1;
			continue;
		}
		die(builtin_mv_usage);
	}
	count = argc - i - 1;
	if (count < 1)
		usage(builtin_mv_usage);

	source = copy_pathspec(prefix, argv + i, count, 0);
	modes = xcalloc(count, sizeof(enum update_mode));
	dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);

	if (!lstat(dest_path[0], &st) &&
			S_ISDIR(st.st_mode)) {
		dest_path[0] = add_slash(dest_path[0]);
		destination = copy_pathspec(dest_path[0], argv + i, count, 1);
	} else {
		if (count != 1)
			usage(builtin_mv_usage);
		destination = dest_path;
	}

	/* Checking */
	for (i = 0; i < count; i++) {
		const char *bad = NULL;

		if (show_only)
			printf("Checking rename of '%s' to '%s'\n",
				source[i], destination[i]);

		if (lstat(source[i], &st) < 0)
			bad = "bad source";

		if (S_ISDIR(st.st_mode)) {
			const char *dir = source[i], *dest_dir = destination[i];
			int first, last, len = strlen(dir);

			if (lstat(dest_dir, &st) == 0) {
				bad = "cannot move directory over file";
				goto next;
			}

			modes[i] = WORKING_DIRECTORY;

			first = cache_name_pos(source[i], len);
			if (first >= 0)
				die ("Huh? %s/ is in index?", dir);

			first = -1 - first;
			for (last = first; last < active_nr; last++) {
				const char *path = active_cache[last]->name;
				if (strncmp(path, dir, len) || path[len] != '/')
					break;
			}

			if (last - first < 1)
				bad = "source directory is empty";
			else if (!bad) {
				int j, dst_len = strlen(dest_dir);

				if (last - first > 0) {
					source = realloc(source,
							(count + last - first)
							* sizeof(char *));
					destination = realloc(destination,
							(count + last - first)
							* sizeof(char *));
					modes = realloc(modes,
							(count + last - first)
							* sizeof(enum update_mode));
				}

				dest_dir = add_slash(dest_dir);

				for (j = 0; j < last - first; j++) {
					const char *path =
						active_cache[first + j]->name;
					source[count + j] = path;
					destination[count + j] =
						prefix_path(dest_dir, dst_len,
							path + len);
					modes[count + j] = INDEX;
				}
				count += last - first;
			}

			goto next;
		}

		if (!bad && lstat(destination[i], &st) == 0) {
			bad = "destination exists";
			if (force) {
				/*
				 * only files can overwrite each other:
				 * check both source and destination
				 */
				if (S_ISREG(st.st_mode)) {
					fprintf(stderr, "Warning: %s;"
							" will overwrite!\n",
							bad);
					bad = NULL;
					path_list_insert(destination[i],
							&overwritten);
				} else
					bad = "Cannot overwrite";
			}
		}

		if (!bad &&
		    !strncmp(destination[i], source[i], strlen(source[i])))
			bad = "can not move directory into itself";

		if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)
			bad = "not under version control";

		if (!bad) {
			if (path_list_has_path(&src_for_dst, destination[i]))
				bad = "multiple sources for the same target";
			else
				path_list_insert(destination[i], &src_for_dst);
		}

next:
		if (bad) {
			if (ignore_errors) {
				if (--count > 0) {
					memmove(source + i, source + i + 1,
						(count - i) * sizeof(char *));
					memmove(destination + i,
						destination + i + 1,
						(count - i) * sizeof(char *));
				}
			} else
				die ("%s, source=%s, destination=%s",
				     bad, source[i], destination[i]);
		}
	}

	for (i = 0; i < count; i++) {
		if (show_only || verbose)
			printf("Renaming %s to %s\n",
			       source[i], destination[i]);
		if (!show_only && modes[i] != INDEX &&
		    rename(source[i], destination[i]) < 0 &&
		    !ignore_errors)
			die ("renaming %s failed: %s",
			     source[i], strerror(errno));

		if (modes[i] == WORKING_DIRECTORY)
			continue;

		if (cache_name_pos(source[i], strlen(source[i])) >= 0) {
			path_list_insert(source[i], &deleted);

			/* destination can be a directory with 1 file inside */
			if (path_list_has_path(&overwritten, destination[i]))
				path_list_insert(destination[i], &changed);
			else
				path_list_insert(destination[i], &added);
		} else
			path_list_insert(destination[i], &added);
	}

        if (show_only) {
		show_list("Changed  : ", &changed);
		show_list("Adding   : ", &added);
		show_list("Deleting : ", &deleted);
	} else {
		for (i = 0; i < changed.nr; i++) {
			const char *path = changed.items[i].path;
			int i = cache_name_pos(path, strlen(path));
			struct cache_entry *ce = active_cache[i];

			if (i < 0)
				die ("Huh? Cache entry for %s unknown?", path);
			refresh_cache_entry(ce, 0);
		}

		for (i = 0; i < added.nr; i++) {
			const char *path = added.items[i].path;
			add_file_to_index(path, verbose);
		}

		for (i = 0; i < deleted.nr; i++) {
			const char *path = deleted.items[i].path;
			remove_file_from_cache(path);
		}

		if (active_cache_changed) {
			if (write_cache(newfd, active_cache, active_nr) ||
			    close(newfd) ||
			    commit_lock_file(&lock_file))
				die("Unable to write new index file");
		}
	}

	return 0;
}
Commit	Line	Data
11be42a4 JS	1	/*
	2	* "git mv" builtin command
	3	*
	4	* Copyright (C) 2006 Johannes Schindelin
	5	*/
	6	#include <fnmatch.h>
	7
	8	#include "cache.h"
	9	#include "builtin.h"
	10	#include "dir.h"
	11	#include "cache-tree.h"
	12	#include "path-list.h"
	13
	14	static const char builtin_mv_usage[] =
	15	"git-mv [-n] [-f] (<source> <destination> \| [-k] <source>... <destination>)";
	16
	17	static const char *copy_pathspec(const char prefix, const char **pathspec,
	18	int count, int base_name)
	19	{
	20	const char *result = xmalloc((count + 1) sizeof(const char *));
	21	memcpy(result, pathspec, count * sizeof(const char *));
	22	result[count] = NULL;
	23	if (base_name) {
	24	int i;
	25	for (i = 0; i < count; i++) {
	26	const char *last_slash = strrchr(result[i], '/');
	27	if (last_slash)
	28	result[i] = last_slash + 1;
	29	}
	30	}
	31	return get_pathspec(prefix, result);
	32	}
	33
	34	static void show_list(const char label, struct path_list list)
	35	{
	36	if (list->nr > 0) {
	37	int i;
	38	printf("%s", label);
	39	for (i = 0; i < list->nr; i++)
	40	printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
	41	putchar('\n');
	42	}
	43	}
	44
ac64a722 JS	45	static const char add_slash(const char path)
	46	{
	47	int len = strlen(path);
	48	if (path[len - 1] != '/') {
	49	char *with_slash = xmalloc(len + 2);
	50	memcpy(with_slash, path, len);
	51	strcat(with_slash + len, "/");
	52	return with_slash;
	53	}
	54	return path;
	55	}
	56
11be42a4 JS	57	static struct lock_file lock_file;
11be42a4 JS	58
7061cf0f	59	int cmd_mv(int argc, const char *argv, const char prefix)
11be42a4 JS	60	{
	61	int i, newfd, count;
	62	int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
11be42a4	63	const char source, destination, **dest_path;
ac64a722	64	enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
11be42a4 JS	65	struct stat st;
	66	struct path_list overwritten = {NULL, 0, 0, 0};
	67	struct path_list src_for_dst = {NULL, 0, 0, 0};
	68	struct path_list added = {NULL, 0, 0, 0};
	69	struct path_list deleted = {NULL, 0, 0, 0};
	70	struct path_list changed = {NULL, 0, 0, 0};
	71
	72	git_config(git_default_config);
	73
	74	newfd = hold_lock_file_for_update(&lock_file, get_index_file());
	75	if (newfd < 0)
	76	die("unable to create new index file");
	77
	78	if (read_cache() < 0)
	79	die("index file corrupt");
	80
	81	for (i = 1; i < argc; i++) {
	82	const char *arg = argv[i];
	83
	84	if (arg[0] != '-')
	85	break;
	86	if (!strcmp(arg, "--")) {
	87	i++;
	88	break;
	89	}
	90	if (!strcmp(arg, "-n")) {
	91	show_only = 1;
	92	continue;
	93	}
	94	if (!strcmp(arg, "-f")) {
	95	force = 1;
	96	continue;
	97	}
	98	if (!strcmp(arg, "-k")) {
	99	ignore_errors = 1;
	100	continue;
	101	}
	102	die(builtin_mv_usage);
	103	}
	104	count = argc - i - 1;
	105	if (count < 1)
	106	usage(builtin_mv_usage);
	107
	108	source = copy_pathspec(prefix, argv + i, count, 0);
ac64a722	109	modes = xcalloc(count, sizeof(enum update_mode));
11be42a4 JS	110	dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);
11be42a4 JS	111
ac64a722 JS	112	if (!lstat(dest_path[0], &st) &&
	113	S_ISDIR(st.st_mode)) {
	114	dest_path[0] = add_slash(dest_path[0]);
11be42a4	115	destination = copy_pathspec(dest_path[0], argv + i, count, 1);
ac64a722	116	} else {
11be42a4 JS	117	if (count != 1)
	118	usage(builtin_mv_usage);
	119	destination = dest_path;
	120	}
	121
	122	/* Checking */
	123	for (i = 0; i < count; i++) {
	124	const char *bad = NULL;
	125
	126	if (show_only)
	127	printf("Checking rename of '%s' to '%s'\n",
	128	source[i], destination[i]);
	129
	130	if (lstat(source[i], &st) < 0)
	131	bad = "bad source";
ac64a722 JS	132
	133	if (S_ISDIR(st.st_mode)) {
	134	const char dir = source[i], dest_dir = destination[i];
	135	int first, last, len = strlen(dir);
	136
	137	if (lstat(dest_dir, &st) == 0) {
	138	bad = "cannot move directory over file";
	139	goto next;
	140	}
	141
	142	modes[i] = WORKING_DIRECTORY;
	143
	144	first = cache_name_pos(source[i], len);
	145	if (first >= 0)
	146	die ("Huh? %s/ is in index?", dir);
	147
	148	first = -1 - first;
	149	for (last = first; last < active_nr; last++) {
	150	const char *path = active_cache[last]->name;
	151	if (strncmp(path, dir, len) \|\| path[len] != '/')
	152	break;
	153	}
	154
	155	if (last - first < 1)
	156	bad = "source directory is empty";
	157	else if (!bad) {
	158	int j, dst_len = strlen(dest_dir);
	159
	160	if (last - first > 0) {
	161	source = realloc(source,
	162	(count + last - first)
	163	* sizeof(char *));
	164	destination = realloc(destination,
	165	(count + last - first)
	166	* sizeof(char *));
	167	modes = realloc(modes,
	168	(count + last - first)
	169	* sizeof(enum update_mode));
	170	}
	171
	172	dest_dir = add_slash(dest_dir);
	173
	174	for (j = 0; j < last - first; j++) {
	175	const char *path =
	176	active_cache[first + j]->name;
	177	source[count + j] = path;
	178	destination[count + j] =
	179	prefix_path(dest_dir, dst_len,
	180	path + len);
	181	modes[count + j] = INDEX;
	182	}
	183	count += last - first;
	184	}
	185
	186	goto next;
	187	}
	188
	189	if (!bad && lstat(destination[i], &st) == 0) {
11be42a4 JS	190	bad = "destination exists";
	191	if (force) {
	192	/*
	193	* only files can overwrite each other:
	194	* check both source and destination
	195	*/
	196	if (S_ISREG(st.st_mode)) {
	197	fprintf(stderr, "Warning: %s;"
	198	" will overwrite!\n",
	199	bad);
	200	bad = NULL;
	201	path_list_insert(destination[i],
	202	&overwritten);
	203	} else
	204	bad = "Cannot overwrite";
	205	}
	206	}
	207
	208	if (!bad &&
	209	!strncmp(destination[i], source[i], strlen(source[i])))
	210	bad = "can not move directory into itself";
	211
	212	if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)
	213	bad = "not under version control";
	214
	215	if (!bad) {
	216	if (path_list_has_path(&src_for_dst, destination[i]))
	217	bad = "multiple sources for the same target";
	218	else
	219	path_list_insert(destination[i], &src_for_dst);
	220	}
	221
ac64a722	222	next:
11be42a4 JS	223	if (bad) {
	224	if (ignore_errors) {
	225	if (--count > 0) {
	226	memmove(source + i, source + i + 1,
	227	(count - i) * sizeof(char *));
	228	memmove(destination + i,
	229	destination + i + 1,
	230	(count - i) * sizeof(char *));
	231	}
	232	} else
ac64a722	233	die ("%s, source=%s, destination=%s",
11be42a4 JS	234	bad, source[i], destination[i]);
	235	}
	236	}
	237
	238	for (i = 0; i < count; i++) {
	239	if (show_only \|\| verbose)
	240	printf("Renaming %s to %s\n",
	241	source[i], destination[i]);
ac64a722	242	if (!show_only && modes[i] != INDEX &&
11be42a4 JS	243	rename(source[i], destination[i]) < 0 &&
	244	!ignore_errors)
	245	die ("renaming %s failed: %s",
	246	source[i], strerror(errno));
	247
ac64a722 JS	248	if (modes[i] == WORKING_DIRECTORY)
	249	continue;
	250
11be42a4 JS	251	if (cache_name_pos(source[i], strlen(source[i])) >= 0) {
	252	path_list_insert(source[i], &deleted);
	253
	254	/* destination can be a directory with 1 file inside */
	255	if (path_list_has_path(&overwritten, destination[i]))
	256	path_list_insert(destination[i], &changed);
	257	else
	258	path_list_insert(destination[i], &added);
	259	} else
	260	path_list_insert(destination[i], &added);
	261	}
	262
	263	if (show_only) {
	264	show_list("Changed : ", &changed);
	265	show_list("Adding : ", &added);
	266	show_list("Deleting : ", &deleted);
	267	} else {
	268	for (i = 0; i < changed.nr; i++) {
	269	const char *path = changed.items[i].path;
	270	int i = cache_name_pos(path, strlen(path));
	271	struct cache_entry *ce = active_cache[i];
	272
	273	if (i < 0)
	274	die ("Huh? Cache entry for %s unknown?", path);
	275	refresh_cache_entry(ce, 0);
	276	}
	277
	278	for (i = 0; i < added.nr; i++) {
	279	const char *path = added.items[i].path;
	280	add_file_to_index(path, verbose);
	281	}
	282
	283	for (i = 0; i < deleted.nr; i++) {
	284	const char *path = deleted.items[i].path;
	285	remove_file_from_cache(path);
	286	}
	287
	288	if (active_cache_changed) {
	289	if (write_cache(newfd, active_cache, active_nr) \|\|
	290	close(newfd) \|\|
	291	commit_lock_file(&lock_file))
	292	die("Unable to write new index file");
	293	}
	294	}
	295
	296	return 0;
	297	}