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

/*
 * "git mv" builtin command
 *
 * Copyright (C) 2006 Johannes Schindelin
 */
#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 - 1] = '\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 (dest_path[0][0] == '\0')
		/* special case: "." was normalized to "" */
		destination = copy_pathspec(dest_path[0], argv + i, count, 1);
	else 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 *src = source[i], *dst = destination[i];
		int length, src_is_dir;
		const char *bad = NULL;

		if (show_only)
			printf("Checking rename of '%s' to '%s'\n", src, dst);

		length = strlen(src);
		if (lstat(src, &st) < 0)
			bad = "bad source";
		else if (!strncmp(src, dst, length) &&
				(dst[length] == 0 || dst[length] == '/')) {
			bad = "can not move directory into itself";
		} else if ((src_is_dir = S_ISDIR(st.st_mode))
				&& lstat(dst, &st) == 0)
			bad = "cannot move directory over file";
		else if (src_is_dir) {
			const char *src_w_slash = add_slash(src);
			int len_w_slash = length + 1;
			int first, last;

			modes[i] = WORKING_DIRECTORY;

			first = cache_name_pos(src_w_slash, len_w_slash);
			if (first >= 0)
				die ("Huh? %.*s is in index?",
						len_w_slash, src_w_slash);

			first = -1 - first;
			for (last = first; last < active_nr; last++) {
				const char *path = active_cache[last]->name;
				if (strncmp(path, src_w_slash, len_w_slash))
					break;
			}
			free((char *)src_w_slash);

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

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

				dst = add_slash(dst);
				dst_len = strlen(dst) - 1;

				for (j = 0; j < last - first; j++) {
					const char *path =
						active_cache[first + j]->name;
					source[count + j] = path;
					destination[count + j] =
						prefix_path(dst, dst_len,
							path + length);
					modes[count + j] = INDEX;
				}
				count += last - first;
			}
		} else if (lstat(dst, &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(dst, &overwritten);
				} else
					bad = "Cannot overwrite";
			}
		} else if (cache_name_pos(src, length) < 0)
			bad = "not under version control";
		else if (path_list_has_path(&src_for_dst, dst))
			bad = "multiple sources for the same target";
		else
			path_list_insert(dst, &src_for_dst);

		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, src, dst);
		}
	}

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

		if (mode == WORKING_DIRECTORY)
			continue;

		if (cache_name_pos(src, strlen(src)) >= 0) {
			path_list_insert(src, &deleted);

			/* destination can be a directory with 1 file inside */
			if (path_list_has_path(&overwritten, dst))
				path_list_insert(dst, &changed);
			else
				path_list_insert(dst, &added);
		} else
			path_list_insert(dst, &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 j = cache_name_pos(path, strlen(path));
			struct cache_entry *ce = active_cache[j];

			if (j < 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);
			cache_tree_invalidate_path(active_cache_tree, 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	*/
11be42a4 JS	6	#include "cache.h"
	7	#include "builtin.h"
	8	#include "dir.h"
	9	#include "cache-tree.h"
	10	#include "path-list.h"
	11
	12	static const char builtin_mv_usage[] =
	13	"git-mv [-n] [-f] (<source> <destination> \| [-k] <source>... <destination>)";
	14
	15	static const char *copy_pathspec(const char prefix, const char **pathspec,
	16	int count, int base_name)
	17	{
d78b0f3d	18	int i;
11be42a4 JS	19	const char *result = xmalloc((count + 1) sizeof(const char *));
	20	memcpy(result, pathspec, count * sizeof(const char *));
	21	result[count] = NULL;
d78b0f3d JS	22	for (i = 0; i < count; i++) {
	23	int length = strlen(result[i]);
	24	if (length > 0 && result[i][length - 1] == '/') {
	25	char *without_slash = xmalloc(length);
	26	memcpy(without_slash, result[i], length - 1);
6e17886d	27	without_slash[length - 1] = '\0';
d78b0f3d JS	28	result[i] = without_slash;
	29	}
	30	if (base_name) {
11be42a4 JS	31	const char *last_slash = strrchr(result[i], '/');
	32	if (last_slash)
	33	result[i] = last_slash + 1;
	34	}
	35	}
	36	return get_pathspec(prefix, result);
	37	}
	38
	39	static void show_list(const char label, struct path_list list)
	40	{
	41	if (list->nr > 0) {
	42	int i;
	43	printf("%s", label);
	44	for (i = 0; i < list->nr; i++)
	45	printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
	46	putchar('\n');
	47	}
	48	}
	49
ac64a722 JS	50	static const char add_slash(const char path)
	51	{
	52	int len = strlen(path);
	53	if (path[len - 1] != '/') {
	54	char *with_slash = xmalloc(len + 2);
	55	memcpy(with_slash, path, len);
329a3047 JH	56	with_slash[len++] = '/';
329a3047 JH	57	with_slash[len] = 0;
ac64a722 JS	58	return with_slash;
	59	}
	60	return path;
	61	}
	62
11be42a4 JS	63	static struct lock_file lock_file;
11be42a4 JS	64
7061cf0f	65	int cmd_mv(int argc, const char *argv, const char prefix)
11be42a4 JS	66	{
	67	int i, newfd, count;
	68	int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
11be42a4	69	const char source, destination, **dest_path;
ac64a722	70	enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
11be42a4 JS	71	struct stat st;
	72	struct path_list overwritten = {NULL, 0, 0, 0};
	73	struct path_list src_for_dst = {NULL, 0, 0, 0};
	74	struct path_list added = {NULL, 0, 0, 0};
	75	struct path_list deleted = {NULL, 0, 0, 0};
	76	struct path_list changed = {NULL, 0, 0, 0};
	77
	78	git_config(git_default_config);
	79
40aaae88	80	newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
11be42a4 JS	81	if (read_cache() < 0)
	82	die("index file corrupt");
	83
	84	for (i = 1; i < argc; i++) {
	85	const char *arg = argv[i];
	86
	87	if (arg[0] != '-')
	88	break;
	89	if (!strcmp(arg, "--")) {
	90	i++;
	91	break;
	92	}
	93	if (!strcmp(arg, "-n")) {
	94	show_only = 1;
	95	continue;
	96	}
	97	if (!strcmp(arg, "-f")) {
	98	force = 1;
	99	continue;
	100	}
	101	if (!strcmp(arg, "-k")) {
	102	ignore_errors = 1;
	103	continue;
	104	}
cba05fa8	105	usage(builtin_mv_usage);
11be42a4 JS	106	}
	107	count = argc - i - 1;
	108	if (count < 1)
	109	usage(builtin_mv_usage);
	110
	111	source = copy_pathspec(prefix, argv + i, count, 0);
ac64a722	112	modes = xcalloc(count, sizeof(enum update_mode));
11be42a4 JS	113	dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);
11be42a4 JS	114
c5203bdf JS	115	if (dest_path[0][0] == '\0')
	116	/* special case: "." was normalized to "" */
	117	destination = copy_pathspec(dest_path[0], argv + i, count, 1);
	118	else if (!lstat(dest_path[0], &st) &&
ac64a722 JS	119	S_ISDIR(st.st_mode)) {
ac64a722 JS	120	dest_path[0] = add_slash(dest_path[0]);
11be42a4	121	destination = copy_pathspec(dest_path[0], argv + i, count, 1);
ac64a722	122	} else {
11be42a4 JS	123	if (count != 1)
	124	usage(builtin_mv_usage);
	125	destination = dest_path;
	126	}
	127
	128	/* Checking */
	129	for (i = 0; i < count; i++) {
60a6bf5f JS	130	const char src = source[i], dst = destination[i];
60a6bf5f JS	131	int length, src_is_dir;
11be42a4 JS	132	const char *bad = NULL;
	133
	134	if (show_only)
60a6bf5f	135	printf("Checking rename of '%s' to '%s'\n", src, dst);
11be42a4	136
60a6bf5f JS	137	length = strlen(src);
60a6bf5f JS	138	if (lstat(src, &st) < 0)
11be42a4	139	bad = "bad source";
60a6bf5f JS	140	else if (!strncmp(src, dst, length) &&
60a6bf5f JS	141	(dst[length] == 0 \|\| dst[length] == '/')) {
d78b0f3d	142	bad = "can not move directory into itself";
60a6bf5f JS	143	} else if ((src_is_dir = S_ISDIR(st.st_mode))
	144	&& lstat(dst, &st) == 0)
	145	bad = "cannot move directory over file";
	146	else if (src_is_dir) {
aca085e5 JS	147	const char *src_w_slash = add_slash(src);
aca085e5 JS	148	int len_w_slash = length + 1;
60a6bf5f	149	int first, last;
ac64a722 JS	150
	151	modes[i] = WORKING_DIRECTORY;
	152
aca085e5	153	first = cache_name_pos(src_w_slash, len_w_slash);
ac64a722	154	if (first >= 0)
aca085e5 JS	155	die ("Huh? %.*s is in index?",
aca085e5 JS	156	len_w_slash, src_w_slash);
ac64a722 JS	157
	158	first = -1 - first;
	159	for (last = first; last < active_nr; last++) {
	160	const char *path = active_cache[last]->name;
aca085e5	161	if (strncmp(path, src_w_slash, len_w_slash))
ac64a722 JS	162	break;
ac64a722 JS	163	}
aca085e5	164	free((char *)src_w_slash);
ac64a722 JS	165
	166	if (last - first < 1)
	167	bad = "source directory is empty";
60a6bf5f JS	168	else {
60a6bf5f JS	169	int j, dst_len;
ac64a722 JS	170
ac64a722 JS	171	if (last - first > 0) {
83572c1a	172	source = xrealloc(source,
ac64a722 JS	173	(count + last - first)
ac64a722 JS	174	* sizeof(char *));
83572c1a	175	destination = xrealloc(destination,
ac64a722 JS	176	(count + last - first)
ac64a722 JS	177	* sizeof(char *));
83572c1a	178	modes = xrealloc(modes,
ac64a722 JS	179	(count + last - first)
	180	* sizeof(enum update_mode));
	181	}
	182
60a6bf5f JS	183	dst = add_slash(dst);
60a6bf5f JS	184	dst_len = strlen(dst) - 1;
ac64a722 JS	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] =
60a6bf5f JS	191	prefix_path(dst, dst_len,
60a6bf5f JS	192	path + length);
ac64a722 JS	193	modes[count + j] = INDEX;
	194	}
	195	count += last - first;
	196	}
60a6bf5f	197	} else if (lstat(dst, &st) == 0) {
11be42a4 JS	198	bad = "destination exists";
	199	if (force) {
	200	/*
	201	* only files can overwrite each other:
	202	* check both source and destination
	203	*/
	204	if (S_ISREG(st.st_mode)) {
	205	fprintf(stderr, "Warning: %s;"
	206	" will overwrite!\n",
	207	bad);
	208	bad = NULL;
60a6bf5f	209	path_list_insert(dst, &overwritten);
11be42a4 JS	210	} else
	211	bad = "Cannot overwrite";
	212	}
60a6bf5f	213	} else if (cache_name_pos(src, length) < 0)
11be42a4	214	bad = "not under version control";
60a6bf5f JS	215	else if (path_list_has_path(&src_for_dst, dst))
	216	bad = "multiple sources for the same target";
	217	else
	218	path_list_insert(dst, &src_for_dst);
11be42a4	219
11be42a4 JS	220	if (bad) {
	221	if (ignore_errors) {
	222	if (--count > 0) {
	223	memmove(source + i, source + i + 1,
	224	(count - i) * sizeof(char *));
	225	memmove(destination + i,
	226	destination + i + 1,
	227	(count - i) * sizeof(char *));
	228	}
	229	} else
ac64a722	230	die ("%s, source=%s, destination=%s",
60a6bf5f	231	bad, src, dst);
11be42a4 JS	232	}
	233	}
	234
	235	for (i = 0; i < count; i++) {
60a6bf5f JS	236	const char src = source[i], dst = destination[i];
60a6bf5f JS	237	enum update_mode mode = modes[i];
11be42a4	238	if (show_only \|\| verbose)
60a6bf5f JS	239	printf("Renaming %s to %s\n", src, dst);
	240	if (!show_only && mode != INDEX &&
	241	rename(src, dst) < 0 && !ignore_errors)
	242	die ("renaming %s failed: %s", src, strerror(errno));
	243
	244	if (mode == WORKING_DIRECTORY)
ac64a722 JS	245	continue;
ac64a722 JS	246
60a6bf5f JS	247	if (cache_name_pos(src, strlen(src)) >= 0) {
60a6bf5f JS	248	path_list_insert(src, &deleted);
11be42a4 JS	249
11be42a4 JS	250	/* destination can be a directory with 1 file inside */
60a6bf5f JS	251	if (path_list_has_path(&overwritten, dst))
60a6bf5f JS	252	path_list_insert(dst, &changed);
11be42a4	253	else
60a6bf5f	254	path_list_insert(dst, &added);
11be42a4	255	} else
60a6bf5f	256	path_list_insert(dst, &added);
11be42a4 JS	257	}
	258
	259	if (show_only) {
	260	show_list("Changed : ", &changed);
	261	show_list("Adding : ", &added);
	262	show_list("Deleting : ", &deleted);
	263	} else {
	264	for (i = 0; i < changed.nr; i++) {
	265	const char *path = changed.items[i].path;
d828f6dd PH	266	int j = cache_name_pos(path, strlen(path));
d828f6dd PH	267	struct cache_entry *ce = active_cache[j];
11be42a4	268
d828f6dd	269	if (j < 0)
11be42a4 JS	270	die ("Huh? Cache entry for %s unknown?", path);
	271	refresh_cache_entry(ce, 0);
	272	}
	273
	274	for (i = 0; i < added.nr; i++) {
	275	const char *path = added.items[i].path;
	276	add_file_to_index(path, verbose);
	277	}
	278
	279	for (i = 0; i < deleted.nr; i++) {
	280	const char *path = deleted.items[i].path;
	281	remove_file_from_cache(path);
4fddf579	282	cache_tree_invalidate_path(active_cache_tree, path);
11be42a4 JS	283	}
	284
	285	if (active_cache_changed) {
	286	if (write_cache(newfd, active_cache, active_nr) \|\|
	287	close(newfd) \|\|
	288	commit_lock_file(&lock_file))
	289	die("Unable to write new index file");
	290	}
	291	}
	292
	293	return 0;
	294	}