[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 "string-list.h"
#include "parse-options.h"

static const char * const builtin_mv_usage[] = {
	"git mv [options] <source>... <destination>",
	NULL
};

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] == '/') {
			result[i] = xmemdupz(result[i], length - 1);
		}
		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 string_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].string);
		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;
	int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
	struct option builtin_mv_options[] = {
		OPT__DRY_RUN(&show_only),
		OPT_BOOLEAN('f', NULL, &force, "force move/rename even if target exists"),
		OPT_BOOLEAN('k', NULL, &ignore_errors, "skip move/rename errors"),
		OPT_END(),
	};
	const char **source, **destination, **dest_path;
	enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
	struct stat st;
	struct string_list overwritten = {NULL, 0, 0, 0};
	struct string_list src_for_dst = {NULL, 0, 0, 0};
	struct string_list added = {NULL, 0, 0, 0};
	struct string_list deleted = {NULL, 0, 0, 0};
	struct string_list changed = {NULL, 0, 0, 0};

	git_config(git_default_config, NULL);

	newfd = hold_locked_index(&lock_file, 1);
	if (read_cache() < 0)
		die("index file corrupt");

	argc = parse_options(argc, argv, builtin_mv_options, builtin_mv_usage, 0);
	if (--argc < 1)
		usage_with_options(builtin_mv_usage, builtin_mv_options);

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

	if (dest_path[0][0] == '\0')
		/* special case: "." was normalized to "" */
		destination = copy_pathspec(dest_path[0], argv, argc, 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, argc, 1);
	} else {
		if (argc != 1)
			usage_with_options(builtin_mv_usage, builtin_mv_options);
		destination = dest_path;
	}

	/* Checking */
	for (i = 0; i < argc; 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,
							(argc + last - first)
							* sizeof(char *));
					destination = xrealloc(destination,
							(argc + last - first)
							* sizeof(char *));
					modes = xrealloc(modes,
							(argc + last - first)
							* sizeof(enum update_mode));
				}

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

				for (j = 0; j < last - first; j++) {
					const char *path =
						active_cache[first + j]->name;
					source[argc + j] = path;
					destination[argc + j] =
						prefix_path(dst, dst_len,
							path + length + 1);
					modes[argc + j] = INDEX;
				}
				argc += 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;
					string_list_insert(dst, &overwritten);
				} else
					bad = "Cannot overwrite";
			}
		} else if (cache_name_pos(src, length) < 0)
			bad = "not under version control";
		else if (string_list_has_string(&src_for_dst, dst))
			bad = "multiple sources for the same target";
		else
			string_list_insert(dst, &src_for_dst);

		if (bad) {
			if (ignore_errors) {
				if (--argc > 0) {
					memmove(source + i, source + i + 1,
						(argc - i) * sizeof(char *));
					memmove(destination + i,
						destination + i + 1,
						(argc - i) * sizeof(char *));
				}
			} else
				die ("%s, source=%s, destination=%s",
				     bad, src, dst);
		}
	}

	for (i = 0; i < argc; 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;

		assert(cache_name_pos(src, strlen(src)) >= 0);

		string_list_insert(src, &deleted);
		/* destination can be a directory with 1 file inside */
		if (string_list_has_string(&overwritten, dst))
			string_list_insert(dst, &changed);
		else
			string_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].string;
			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].string;
			if (add_file_to_cache(path, verbose ? ADD_CACHE_VERBOSE : 0))
				die("updating index entries failed");
		}

		for (i = 0; i < deleted.nr; i++)
			remove_file_from_cache(deleted.items[i].string);

		if (active_cache_changed) {
			if (write_cache(newfd, active_cache, active_nr) ||
			    commit_locked_index(&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"
c455c87c	10	#include "string-list.h"
c7a20c11	11	#include "parse-options.h"
11be42a4	12
c7a20c11	13	static const char * const builtin_mv_usage[] = {
1b1dd23f	14	"git mv [options] <source>... <destination>",
c7a20c11 PH	15	NULL
c7a20c11 PH	16	};
11be42a4 JS	17
	18	static const char *copy_pathspec(const char prefix, const char **pathspec,
	19	int count, int base_name)
	20	{
d78b0f3d	21	int i;
11be42a4 JS	22	const char *result = xmalloc((count + 1) sizeof(const char *));
	23	memcpy(result, pathspec, count * sizeof(const char *));
	24	result[count] = NULL;
d78b0f3d JS	25	for (i = 0; i < count; i++) {
	26	int length = strlen(result[i]);
	27	if (length > 0 && result[i][length - 1] == '/') {
182af834	28	result[i] = xmemdupz(result[i], length - 1);
d78b0f3d JS	29	}
d78b0f3d JS	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	}
971dfa19	36	return get_pathspec(prefix, result);
11be42a4 JS	37	}
11be42a4 JS	38
c455c87c	39	static void show_list(const char label, struct string_list list)
11be42a4 JS	40	{
	41	if (list->nr > 0) {
	42	int i;
	43	printf("%s", label);
	44	for (i = 0; i < list->nr; i++)
c455c87c JS	45	printf("%s%s", i > 0 ? ", " : "",
c455c87c JS	46	list->items[i].string);
11be42a4 JS	47	putchar('\n');
	48	}
	49	}
	50
ac64a722 JS	51	static const char add_slash(const char path)
	52	{
	53	int len = strlen(path);
	54	if (path[len - 1] != '/') {
	55	char *with_slash = xmalloc(len + 2);
	56	memcpy(with_slash, path, len);
329a3047 JH	57	with_slash[len++] = '/';
329a3047 JH	58	with_slash[len] = 0;
ac64a722 JS	59	return with_slash;
	60	}
	61	return path;
	62	}
	63
11be42a4 JS	64	static struct lock_file lock_file;
11be42a4 JS	65
7061cf0f	66	int cmd_mv(int argc, const char *argv, const char prefix)
11be42a4	67	{
c7a20c11	68	int i, newfd;
11be42a4	69	int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
c7a20c11 PH	70	struct option builtin_mv_options[] = {
	71	OPT__DRY_RUN(&show_only),
	72	OPT_BOOLEAN('f', NULL, &force, "force move/rename even if target exists"),
	73	OPT_BOOLEAN('k', NULL, &ignore_errors, "skip move/rename errors"),
	74	OPT_END(),
	75	};
11be42a4	76	const char source, destination, **dest_path;
ac64a722	77	enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
11be42a4	78	struct stat st;
c455c87c JS	79	struct string_list overwritten = {NULL, 0, 0, 0};
	80	struct string_list src_for_dst = {NULL, 0, 0, 0};
	81	struct string_list added = {NULL, 0, 0, 0};
	82	struct string_list deleted = {NULL, 0, 0, 0};
	83	struct string_list changed = {NULL, 0, 0, 0};
11be42a4	84
ef90d6d4	85	git_config(git_default_config, NULL);
11be42a4	86
30ca07a2	87	newfd = hold_locked_index(&lock_file, 1);
11be42a4 JS	88	if (read_cache() < 0)
	89	die("index file corrupt");
	90
c7a20c11 PH	91	argc = parse_options(argc, argv, builtin_mv_options, builtin_mv_usage, 0);
	92	if (--argc < 1)
	93	usage_with_options(builtin_mv_usage, builtin_mv_options);
11be42a4	94
c7a20c11 PH	95	source = copy_pathspec(prefix, argv, argc, 0);
	96	modes = xcalloc(argc, sizeof(enum update_mode));
	97	dest_path = copy_pathspec(prefix, argv + argc, 1, 0);
11be42a4	98
c5203bdf JS	99	if (dest_path[0][0] == '\0')
c5203bdf JS	100	/* special case: "." was normalized to "" */
c7a20c11	101	destination = copy_pathspec(dest_path[0], argv, argc, 1);
c5203bdf	102	else if (!lstat(dest_path[0], &st) &&
ac64a722 JS	103	S_ISDIR(st.st_mode)) {
ac64a722 JS	104	dest_path[0] = add_slash(dest_path[0]);
c7a20c11	105	destination = copy_pathspec(dest_path[0], argv, argc, 1);
ac64a722	106	} else {
c7a20c11 PH	107	if (argc != 1)
c7a20c11 PH	108	usage_with_options(builtin_mv_usage, builtin_mv_options);
11be42a4 JS	109	destination = dest_path;
	110	}
	111
	112	/* Checking */
c7a20c11	113	for (i = 0; i < argc; i++) {
60a6bf5f JS	114	const char src = source[i], dst = destination[i];
60a6bf5f JS	115	int length, src_is_dir;
11be42a4 JS	116	const char *bad = NULL;
	117
	118	if (show_only)
60a6bf5f	119	printf("Checking rename of '%s' to '%s'\n", src, dst);
11be42a4	120
60a6bf5f JS	121	length = strlen(src);
60a6bf5f JS	122	if (lstat(src, &st) < 0)
11be42a4	123	bad = "bad source";
60a6bf5f JS	124	else if (!strncmp(src, dst, length) &&
60a6bf5f JS	125	(dst[length] == 0 \|\| dst[length] == '/')) {
d78b0f3d	126	bad = "can not move directory into itself";
60a6bf5f JS	127	} else if ((src_is_dir = S_ISDIR(st.st_mode))
	128	&& lstat(dst, &st) == 0)
	129	bad = "cannot move directory over file";
	130	else if (src_is_dir) {
aca085e5 JS	131	const char *src_w_slash = add_slash(src);
aca085e5 JS	132	int len_w_slash = length + 1;
60a6bf5f	133	int first, last;
ac64a722 JS	134
	135	modes[i] = WORKING_DIRECTORY;
	136
aca085e5	137	first = cache_name_pos(src_w_slash, len_w_slash);
ac64a722	138	if (first >= 0)
aca085e5 JS	139	die ("Huh? %.*s is in index?",
aca085e5 JS	140	len_w_slash, src_w_slash);
ac64a722 JS	141
	142	first = -1 - first;
	143	for (last = first; last < active_nr; last++) {
	144	const char *path = active_cache[last]->name;
aca085e5	145	if (strncmp(path, src_w_slash, len_w_slash))
ac64a722 JS	146	break;
ac64a722 JS	147	}
aca085e5	148	free((char *)src_w_slash);
ac64a722 JS	149
	150	if (last - first < 1)
	151	bad = "source directory is empty";
60a6bf5f JS	152	else {
60a6bf5f JS	153	int j, dst_len;
ac64a722 JS	154
ac64a722 JS	155	if (last - first > 0) {
83572c1a	156	source = xrealloc(source,
c7a20c11	157	(argc + last - first)
ac64a722	158	* sizeof(char *));
83572c1a	159	destination = xrealloc(destination,
c7a20c11	160	(argc + last - first)
ac64a722	161	* sizeof(char *));
83572c1a	162	modes = xrealloc(modes,
c7a20c11	163	(argc + last - first)
ac64a722 JS	164	* sizeof(enum update_mode));
	165	}
	166
60a6bf5f	167	dst = add_slash(dst);
d089ebaa	168	dst_len = strlen(dst);
ac64a722 JS	169
	170	for (j = 0; j < last - first; j++) {
	171	const char *path =
	172	active_cache[first + j]->name;
c7a20c11 PH	173	source[argc + j] = path;
c7a20c11 PH	174	destination[argc + j] =
60a6bf5f	175	prefix_path(dst, dst_len,
d089ebaa	176	path + length + 1);
c7a20c11	177	modes[argc + j] = INDEX;
ac64a722	178	}
c7a20c11	179	argc += last - first;
ac64a722	180	}
60a6bf5f	181	} else if (lstat(dst, &st) == 0) {
11be42a4 JS	182	bad = "destination exists";
	183	if (force) {
	184	/*
	185	* only files can overwrite each other:
	186	* check both source and destination
	187	*/
	188	if (S_ISREG(st.st_mode)) {
	189	fprintf(stderr, "Warning: %s;"
	190	" will overwrite!\n",
	191	bad);
	192	bad = NULL;
c455c87c	193	string_list_insert(dst, &overwritten);
11be42a4 JS	194	} else
	195	bad = "Cannot overwrite";
	196	}
60a6bf5f	197	} else if (cache_name_pos(src, length) < 0)
11be42a4	198	bad = "not under version control";
c455c87c	199	else if (string_list_has_string(&src_for_dst, dst))
60a6bf5f JS	200	bad = "multiple sources for the same target";
60a6bf5f JS	201	else
c455c87c	202	string_list_insert(dst, &src_for_dst);
11be42a4	203
11be42a4 JS	204	if (bad) {
11be42a4 JS	205	if (ignore_errors) {
c7a20c11	206	if (--argc > 0) {
11be42a4	207	memmove(source + i, source + i + 1,
c7a20c11	208	(argc - i) * sizeof(char *));
11be42a4 JS	209	memmove(destination + i,
11be42a4 JS	210	destination + i + 1,
c7a20c11	211	(argc - i) * sizeof(char *));
11be42a4 JS	212	}
11be42a4 JS	213	} else
ac64a722	214	die ("%s, source=%s, destination=%s",
60a6bf5f	215	bad, src, dst);
11be42a4 JS	216	}
	217	}
	218
c7a20c11	219	for (i = 0; i < argc; i++) {
60a6bf5f JS	220	const char src = source[i], dst = destination[i];
60a6bf5f JS	221	enum update_mode mode = modes[i];
11be42a4	222	if (show_only \|\| verbose)
60a6bf5f JS	223	printf("Renaming %s to %s\n", src, dst);
	224	if (!show_only && mode != INDEX &&
	225	rename(src, dst) < 0 && !ignore_errors)
	226	die ("renaming %s failed: %s", src, strerror(errno));
	227
	228	if (mode == WORKING_DIRECTORY)
ac64a722 JS	229	continue;
ac64a722 JS	230
f6c52fe4 PB	231	assert(cache_name_pos(src, strlen(src)) >= 0);
	232
	233	string_list_insert(src, &deleted);
	234	/* destination can be a directory with 1 file inside */
	235	if (string_list_has_string(&overwritten, dst))
	236	string_list_insert(dst, &changed);
	237	else
c455c87c	238	string_list_insert(dst, &added);
11be42a4 JS	239	}
11be42a4 JS	240
c7a20c11	241	if (show_only) {
11be42a4 JS	242	show_list("Changed : ", &changed);
	243	show_list("Adding : ", &added);
	244	show_list("Deleting : ", &deleted);
	245	} else {
	246	for (i = 0; i < changed.nr; i++) {
c455c87c	247	const char *path = changed.items[i].string;
d828f6dd PH	248	int j = cache_name_pos(path, strlen(path));
d828f6dd PH	249	struct cache_entry *ce = active_cache[j];
11be42a4	250
d828f6dd	251	if (j < 0)
11be42a4 JS	252	die ("Huh? Cache entry for %s unknown?", path);
	253	refresh_cache_entry(ce, 0);
	254	}
	255
	256	for (i = 0; i < added.nr; i++) {
c455c87c	257	const char *path = added.items[i].string;
01665924	258	if (add_file_to_cache(path, verbose ? ADD_CACHE_VERBOSE : 0))
960b8ad1	259	die("updating index entries failed");
11be42a4 JS	260	}
11be42a4 JS	261
09d5dc32	262	for (i = 0; i < deleted.nr; i++)
c455c87c	263	remove_file_from_cache(deleted.items[i].string);
11be42a4 JS	264
	265	if (active_cache_changed) {
	266	if (write_cache(newfd, active_cache, active_nr) \|\|
30ca07a2	267	commit_locked_index(&lock_file))
11be42a4 JS	268	die("Unable to write new index file");
	269	}
	270	}
	271
	272	return 0;
	273	}