[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)
{
	int i;
	const char **result = xmalloc((count + 1) * sizeof(const char *));
	memcpy(result, pathspec, count * sizeof(const char *));
	result[count] = NULL;
	for (i = 0; i < count; i++) {
		int length = strlen(result[i]);
		if (length > 0 && result[i][length - 1] == '/') {
			char *without_slash = xmalloc(length);
			memcpy(without_slash, result[i], length - 1);
			without_slash[length] = '\0';
			result[i] = without_slash;
		}
		if (base_name) {
			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);
		with_slash[len++] = '/';
		with_slash[len] = 0;
		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(), 1);
	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;
		}
		usage(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++) {
		int length;
		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 (!bad &&
		    (length = strlen(source[i])) >= 0 &&
		    !strncmp(destination[i], source[i], length) &&
		    (destination[i][length] == 0 || destination[i][length] == '/'))
			bad = "can not move directory into itself";

		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 && 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	{
d78b0f3d	20	int i;
11be42a4 JS	21	const char *result = xmalloc((count + 1) sizeof(const char *));
	22	memcpy(result, pathspec, count * sizeof(const char *));
	23	result[count] = NULL;
d78b0f3d JS	24	for (i = 0; i < count; i++) {
	25	int length = strlen(result[i]);
	26	if (length > 0 && result[i][length - 1] == '/') {
	27	char *without_slash = xmalloc(length);
	28	memcpy(without_slash, result[i], length - 1);
	29	without_slash[length] = '\0';
	30	result[i] = without_slash;
	31	}
	32	if (base_name) {
11be42a4 JS	33	const char *last_slash = strrchr(result[i], '/');
	34	if (last_slash)
	35	result[i] = last_slash + 1;
	36	}
	37	}
	38	return get_pathspec(prefix, result);
	39	}
	40
	41	static void show_list(const char label, struct path_list list)
	42	{
	43	if (list->nr > 0) {
	44	int i;
	45	printf("%s", label);
	46	for (i = 0; i < list->nr; i++)
	47	printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
	48	putchar('\n');
	49	}
	50	}
	51
ac64a722 JS	52	static const char add_slash(const char path)
	53	{
	54	int len = strlen(path);
	55	if (path[len - 1] != '/') {
	56	char *with_slash = xmalloc(len + 2);
	57	memcpy(with_slash, path, len);
329a3047 JH	58	with_slash[len++] = '/';
329a3047 JH	59	with_slash[len] = 0;
ac64a722 JS	60	return with_slash;
	61	}
	62	return path;
	63	}
	64
11be42a4 JS	65	static struct lock_file lock_file;
11be42a4 JS	66
7061cf0f	67	int cmd_mv(int argc, const char *argv, const char prefix)
11be42a4 JS	68	{
	69	int i, newfd, count;
	70	int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
11be42a4	71	const char source, destination, **dest_path;
ac64a722	72	enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
11be42a4 JS	73	struct stat st;
	74	struct path_list overwritten = {NULL, 0, 0, 0};
	75	struct path_list src_for_dst = {NULL, 0, 0, 0};
	76	struct path_list added = {NULL, 0, 0, 0};
	77	struct path_list deleted = {NULL, 0, 0, 0};
	78	struct path_list changed = {NULL, 0, 0, 0};
	79
	80	git_config(git_default_config);
	81
40aaae88	82	newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
11be42a4 JS	83	if (read_cache() < 0)
	84	die("index file corrupt");
	85
	86	for (i = 1; i < argc; i++) {
	87	const char *arg = argv[i];
	88
	89	if (arg[0] != '-')
	90	break;
	91	if (!strcmp(arg, "--")) {
	92	i++;
	93	break;
	94	}
	95	if (!strcmp(arg, "-n")) {
	96	show_only = 1;
	97	continue;
	98	}
	99	if (!strcmp(arg, "-f")) {
	100	force = 1;
	101	continue;
	102	}
	103	if (!strcmp(arg, "-k")) {
	104	ignore_errors = 1;
	105	continue;
	106	}
cba05fa8	107	usage(builtin_mv_usage);
11be42a4 JS	108	}
	109	count = argc - i - 1;
	110	if (count < 1)
	111	usage(builtin_mv_usage);
	112
	113	source = copy_pathspec(prefix, argv + i, count, 0);
ac64a722	114	modes = xcalloc(count, sizeof(enum update_mode));
11be42a4 JS	115	dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);
11be42a4 JS	116
ac64a722 JS	117	if (!lstat(dest_path[0], &st) &&
	118	S_ISDIR(st.st_mode)) {
	119	dest_path[0] = add_slash(dest_path[0]);
11be42a4	120	destination = copy_pathspec(dest_path[0], argv + i, count, 1);
ac64a722	121	} else {
11be42a4 JS	122	if (count != 1)
	123	usage(builtin_mv_usage);
	124	destination = dest_path;
	125	}
	126
	127	/* Checking */
	128	for (i = 0; i < count; i++) {
1d6249e6	129	int length;
11be42a4 JS	130	const char *bad = NULL;
	131
	132	if (show_only)
	133	printf("Checking rename of '%s' to '%s'\n",
	134	source[i], destination[i]);
	135
	136	if (lstat(source[i], &st) < 0)
	137	bad = "bad source";
ac64a722	138
d78b0f3d JS	139	if (!bad &&
	140	(length = strlen(source[i])) >= 0 &&
	141	!strncmp(destination[i], source[i], length) &&
	142	(destination[i][length] == 0 \|\| destination[i][length] == '/'))
	143	bad = "can not move directory into itself";
	144
ac64a722 JS	145	if (S_ISDIR(st.st_mode)) {
	146	const char dir = source[i], dest_dir = destination[i];
	147	int first, last, len = strlen(dir);
	148
	149	if (lstat(dest_dir, &st) == 0) {
	150	bad = "cannot move directory over file";
	151	goto next;
	152	}
	153
	154	modes[i] = WORKING_DIRECTORY;
	155
	156	first = cache_name_pos(source[i], len);
	157	if (first >= 0)
	158	die ("Huh? %s/ is in index?", dir);
	159
	160	first = -1 - first;
	161	for (last = first; last < active_nr; last++) {
	162	const char *path = active_cache[last]->name;
	163	if (strncmp(path, dir, len) \|\| path[len] != '/')
	164	break;
	165	}
	166
	167	if (last - first < 1)
	168	bad = "source directory is empty";
	169	else if (!bad) {
	170	int j, dst_len = strlen(dest_dir);
	171
	172	if (last - first > 0) {
	173	source = realloc(source,
	174	(count + last - first)
	175	* sizeof(char *));
	176	destination = realloc(destination,
	177	(count + last - first)
	178	* sizeof(char *));
	179	modes = realloc(modes,
	180	(count + last - first)
	181	* sizeof(enum update_mode));
	182	}
	183
	184	dest_dir = add_slash(dest_dir);
	185
	186	for (j = 0; j < last - first; j++) {
	187	const char *path =
	188	active_cache[first + j]->name;
	189	source[count + j] = path;
	190	destination[count + j] =
	191	prefix_path(dest_dir, dst_len,
	192	path + len);
	193	modes[count + j] = INDEX;
	194	}
	195	count += last - first;
	196	}
	197
	198	goto next;
	199	}
	200
	201	if (!bad && lstat(destination[i], &st) == 0) {
11be42a4 JS	202	bad = "destination exists";
	203	if (force) {
	204	/*
	205	* only files can overwrite each other:
	206	* check both source and destination
	207	*/
	208	if (S_ISREG(st.st_mode)) {
	209	fprintf(stderr, "Warning: %s;"
	210	" will overwrite!\n",
	211	bad);
	212	bad = NULL;
	213	path_list_insert(destination[i],
	214	&overwritten);
	215	} else
	216	bad = "Cannot overwrite";
	217	}
	218	}
	219
11be42a4 JS	220	if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)
	221	bad = "not under version control";
	222
	223	if (!bad) {
	224	if (path_list_has_path(&src_for_dst, destination[i]))
	225	bad = "multiple sources for the same target";
	226	else
	227	path_list_insert(destination[i], &src_for_dst);
	228	}
	229
ac64a722	230	next:
11be42a4 JS	231	if (bad) {
	232	if (ignore_errors) {
	233	if (--count > 0) {
	234	memmove(source + i, source + i + 1,
	235	(count - i) * sizeof(char *));
	236	memmove(destination + i,
	237	destination + i + 1,
	238	(count - i) * sizeof(char *));
	239	}
	240	} else
ac64a722	241	die ("%s, source=%s, destination=%s",
11be42a4 JS	242	bad, source[i], destination[i]);
	243	}
	244	}
	245
	246	for (i = 0; i < count; i++) {
	247	if (show_only \|\| verbose)
	248	printf("Renaming %s to %s\n",
	249	source[i], destination[i]);
ac64a722	250	if (!show_only && modes[i] != INDEX &&
11be42a4 JS	251	rename(source[i], destination[i]) < 0 &&
	252	!ignore_errors)
	253	die ("renaming %s failed: %s",
	254	source[i], strerror(errno));
	255
ac64a722 JS	256	if (modes[i] == WORKING_DIRECTORY)
	257	continue;
	258
11be42a4 JS	259	if (cache_name_pos(source[i], strlen(source[i])) >= 0) {
	260	path_list_insert(source[i], &deleted);
	261
	262	/* destination can be a directory with 1 file inside */
	263	if (path_list_has_path(&overwritten, destination[i]))
	264	path_list_insert(destination[i], &changed);
	265	else
	266	path_list_insert(destination[i], &added);
	267	} else
	268	path_list_insert(destination[i], &added);
	269	}
	270
	271	if (show_only) {
	272	show_list("Changed : ", &changed);
	273	show_list("Adding : ", &added);
	274	show_list("Deleting : ", &deleted);
	275	} else {
	276	for (i = 0; i < changed.nr; i++) {
	277	const char *path = changed.items[i].path;
	278	int i = cache_name_pos(path, strlen(path));
	279	struct cache_entry *ce = active_cache[i];
	280
	281	if (i < 0)
	282	die ("Huh? Cache entry for %s unknown?", path);
	283	refresh_cache_entry(ce, 0);
	284	}
	285
	286	for (i = 0; i < added.nr; i++) {
	287	const char *path = added.items[i].path;
	288	add_file_to_index(path, verbose);
	289	}
	290
	291	for (i = 0; i < deleted.nr; i++) {
	292	const char *path = deleted.items[i].path;
	293	remove_file_from_cache(path);
	294	}
	295
	296	if (active_cache_changed) {
	297	if (write_cache(newfd, active_cache, active_nr) \|\|
	298	close(newfd) \|\|
	299	commit_lock_file(&lock_file))
	300	die("Unable to write new index file");
	301	}
	302	}
	303
	304	return 0;
	305	}