[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"
#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;
	int len = prefix ? strlen(prefix) : 0;
	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;
		}
		result[i] = prefix_path(prefix, len, result[i]);
		if (!result[i])
			exit(1); /* error already given */
	}
	return 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;
	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 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_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;
					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 (--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;

		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_cache(path, verbose);
		}

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

		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"
	10	#include "path-list.h"
c7a20c11	11	#include "parse-options.h"
11be42a4	12
c7a20c11 PH	13	static const char * const builtin_mv_usage[] = {
	14	"git-mv [options] <source>... <destination>",
	15	NULL
	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;
744dacd3	22	int len = prefix ? strlen(prefix) : 0;
11be42a4 JS	23	const char *result = xmalloc((count + 1) sizeof(const char *));
	24	memcpy(result, pathspec, count * sizeof(const char *));
	25	result[count] = NULL;
d78b0f3d JS	26	for (i = 0; i < count; i++) {
	27	int length = strlen(result[i]);
	28	if (length > 0 && result[i][length - 1] == '/') {
182af834	29	result[i] = xmemdupz(result[i], length - 1);
d78b0f3d JS	30	}
d78b0f3d JS	31	if (base_name) {
11be42a4 JS	32	const char *last_slash = strrchr(result[i], '/');
	33	if (last_slash)
	34	result[i] = last_slash + 1;
	35	}
744dacd3 JH	36	result[i] = prefix_path(prefix, len, result[i]);
	37	if (!result[i])
	38	exit(1); /* error already given */
11be42a4	39	}
744dacd3	40	return result;
11be42a4 JS	41	}
	42
	43	static void show_list(const char label, struct path_list list)
	44	{
	45	if (list->nr > 0) {
	46	int i;
	47	printf("%s", label);
	48	for (i = 0; i < list->nr; i++)
	49	printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
	50	putchar('\n');
	51	}
	52	}
	53
ac64a722 JS	54	static const char add_slash(const char path)
	55	{
	56	int len = strlen(path);
	57	if (path[len - 1] != '/') {
	58	char *with_slash = xmalloc(len + 2);
	59	memcpy(with_slash, path, len);
329a3047 JH	60	with_slash[len++] = '/';
329a3047 JH	61	with_slash[len] = 0;
ac64a722 JS	62	return with_slash;
	63	}
	64	return path;
	65	}
	66
11be42a4 JS	67	static struct lock_file lock_file;
11be42a4 JS	68
7061cf0f	69	int cmd_mv(int argc, const char *argv, const char prefix)
11be42a4	70	{
c7a20c11	71	int i, newfd;
11be42a4	72	int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
c7a20c11 PH	73	struct option builtin_mv_options[] = {
	74	OPT__DRY_RUN(&show_only),
	75	OPT_BOOLEAN('f', NULL, &force, "force move/rename even if target exists"),
	76	OPT_BOOLEAN('k', NULL, &ignore_errors, "skip move/rename errors"),
	77	OPT_END(),
	78	};
11be42a4	79	const char source, destination, **dest_path;
ac64a722	80	enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
11be42a4 JS	81	struct stat st;
	82	struct path_list overwritten = {NULL, 0, 0, 0};
	83	struct path_list src_for_dst = {NULL, 0, 0, 0};
	84	struct path_list added = {NULL, 0, 0, 0};
	85	struct path_list deleted = {NULL, 0, 0, 0};
	86	struct path_list changed = {NULL, 0, 0, 0};
	87
	88	git_config(git_default_config);
	89
30ca07a2	90	newfd = hold_locked_index(&lock_file, 1);
11be42a4 JS	91	if (read_cache() < 0)
	92	die("index file corrupt");
	93
c7a20c11 PH	94	argc = parse_options(argc, argv, builtin_mv_options, builtin_mv_usage, 0);
	95	if (--argc < 1)
	96	usage_with_options(builtin_mv_usage, builtin_mv_options);
11be42a4	97
c7a20c11 PH	98	source = copy_pathspec(prefix, argv, argc, 0);
	99	modes = xcalloc(argc, sizeof(enum update_mode));
	100	dest_path = copy_pathspec(prefix, argv + argc, 1, 0);
11be42a4	101
c5203bdf JS	102	if (dest_path[0][0] == '\0')
c5203bdf JS	103	/* special case: "." was normalized to "" */
c7a20c11	104	destination = copy_pathspec(dest_path[0], argv, argc, 1);
c5203bdf	105	else if (!lstat(dest_path[0], &st) &&
ac64a722 JS	106	S_ISDIR(st.st_mode)) {
ac64a722 JS	107	dest_path[0] = add_slash(dest_path[0]);
c7a20c11	108	destination = copy_pathspec(dest_path[0], argv, argc, 1);
ac64a722	109	} else {
c7a20c11 PH	110	if (argc != 1)
c7a20c11 PH	111	usage_with_options(builtin_mv_usage, builtin_mv_options);
11be42a4 JS	112	destination = dest_path;
	113	}
	114
	115	/* Checking */
c7a20c11	116	for (i = 0; i < argc; i++) {
60a6bf5f JS	117	const char src = source[i], dst = destination[i];
60a6bf5f JS	118	int length, src_is_dir;
11be42a4 JS	119	const char *bad = NULL;
	120
	121	if (show_only)
60a6bf5f	122	printf("Checking rename of '%s' to '%s'\n", src, dst);
11be42a4	123
60a6bf5f JS	124	length = strlen(src);
60a6bf5f JS	125	if (lstat(src, &st) < 0)
11be42a4	126	bad = "bad source";
60a6bf5f JS	127	else if (!strncmp(src, dst, length) &&
60a6bf5f JS	128	(dst[length] == 0 \|\| dst[length] == '/')) {
d78b0f3d	129	bad = "can not move directory into itself";
60a6bf5f JS	130	} else if ((src_is_dir = S_ISDIR(st.st_mode))
	131	&& lstat(dst, &st) == 0)
	132	bad = "cannot move directory over file";
	133	else if (src_is_dir) {
aca085e5 JS	134	const char *src_w_slash = add_slash(src);
aca085e5 JS	135	int len_w_slash = length + 1;
60a6bf5f	136	int first, last;
ac64a722 JS	137
	138	modes[i] = WORKING_DIRECTORY;
	139
aca085e5	140	first = cache_name_pos(src_w_slash, len_w_slash);
ac64a722	141	if (first >= 0)
aca085e5 JS	142	die ("Huh? %.*s is in index?",
aca085e5 JS	143	len_w_slash, src_w_slash);
ac64a722 JS	144
	145	first = -1 - first;
	146	for (last = first; last < active_nr; last++) {
	147	const char *path = active_cache[last]->name;
aca085e5	148	if (strncmp(path, src_w_slash, len_w_slash))
ac64a722 JS	149	break;
ac64a722 JS	150	}
aca085e5	151	free((char *)src_w_slash);
ac64a722 JS	152
	153	if (last - first < 1)
	154	bad = "source directory is empty";
60a6bf5f JS	155	else {
60a6bf5f JS	156	int j, dst_len;
ac64a722 JS	157
ac64a722 JS	158	if (last - first > 0) {
83572c1a	159	source = xrealloc(source,
c7a20c11	160	(argc + last - first)
ac64a722	161	* sizeof(char *));
83572c1a	162	destination = xrealloc(destination,
c7a20c11	163	(argc + last - first)
ac64a722	164	* sizeof(char *));
83572c1a	165	modes = xrealloc(modes,
c7a20c11	166	(argc + last - first)
ac64a722 JS	167	* sizeof(enum update_mode));
	168	}
	169
60a6bf5f	170	dst = add_slash(dst);
d089ebaa	171	dst_len = strlen(dst);
ac64a722 JS	172
	173	for (j = 0; j < last - first; j++) {
	174	const char *path =
	175	active_cache[first + j]->name;
c7a20c11 PH	176	source[argc + j] = path;
c7a20c11 PH	177	destination[argc + j] =
60a6bf5f	178	prefix_path(dst, dst_len,
d089ebaa	179	path + length + 1);
c7a20c11	180	modes[argc + j] = INDEX;
ac64a722	181	}
c7a20c11	182	argc += last - first;
ac64a722	183	}
60a6bf5f	184	} else if (lstat(dst, &st) == 0) {
11be42a4 JS	185	bad = "destination exists";
	186	if (force) {
	187	/*
	188	* only files can overwrite each other:
	189	* check both source and destination
	190	*/
	191	if (S_ISREG(st.st_mode)) {
	192	fprintf(stderr, "Warning: %s;"
	193	" will overwrite!\n",
	194	bad);
	195	bad = NULL;
60a6bf5f	196	path_list_insert(dst, &overwritten);
11be42a4 JS	197	} else
	198	bad = "Cannot overwrite";
	199	}
60a6bf5f	200	} else if (cache_name_pos(src, length) < 0)
11be42a4	201	bad = "not under version control";
60a6bf5f JS	202	else if (path_list_has_path(&src_for_dst, dst))
	203	bad = "multiple sources for the same target";
	204	else
	205	path_list_insert(dst, &src_for_dst);
11be42a4	206
11be42a4 JS	207	if (bad) {
11be42a4 JS	208	if (ignore_errors) {
c7a20c11	209	if (--argc > 0) {
11be42a4	210	memmove(source + i, source + i + 1,
c7a20c11	211	(argc - i) * sizeof(char *));
11be42a4 JS	212	memmove(destination + i,
11be42a4 JS	213	destination + i + 1,
c7a20c11	214	(argc - i) * sizeof(char *));
11be42a4 JS	215	}
11be42a4 JS	216	} else
ac64a722	217	die ("%s, source=%s, destination=%s",
60a6bf5f	218	bad, src, dst);
11be42a4 JS	219	}
	220	}
	221
c7a20c11	222	for (i = 0; i < argc; i++) {
60a6bf5f JS	223	const char src = source[i], dst = destination[i];
60a6bf5f JS	224	enum update_mode mode = modes[i];
11be42a4	225	if (show_only \|\| verbose)
60a6bf5f JS	226	printf("Renaming %s to %s\n", src, dst);
	227	if (!show_only && mode != INDEX &&
	228	rename(src, dst) < 0 && !ignore_errors)
	229	die ("renaming %s failed: %s", src, strerror(errno));
	230
	231	if (mode == WORKING_DIRECTORY)
ac64a722 JS	232	continue;
ac64a722 JS	233
60a6bf5f JS	234	if (cache_name_pos(src, strlen(src)) >= 0) {
60a6bf5f JS	235	path_list_insert(src, &deleted);
11be42a4 JS	236
11be42a4 JS	237	/* destination can be a directory with 1 file inside */
60a6bf5f JS	238	if (path_list_has_path(&overwritten, dst))
60a6bf5f JS	239	path_list_insert(dst, &changed);
11be42a4	240	else
60a6bf5f	241	path_list_insert(dst, &added);
11be42a4	242	} else
60a6bf5f	243	path_list_insert(dst, &added);
11be42a4 JS	244	}
11be42a4 JS	245
c7a20c11	246	if (show_only) {
11be42a4 JS	247	show_list("Changed : ", &changed);
	248	show_list("Adding : ", &added);
	249	show_list("Deleting : ", &deleted);
	250	} else {
	251	for (i = 0; i < changed.nr; i++) {
	252	const char *path = changed.items[i].path;
d828f6dd PH	253	int j = cache_name_pos(path, strlen(path));
d828f6dd PH	254	struct cache_entry *ce = active_cache[j];
11be42a4	255
d828f6dd	256	if (j < 0)
11be42a4 JS	257	die ("Huh? Cache entry for %s unknown?", path);
	258	refresh_cache_entry(ce, 0);
	259	}
	260
	261	for (i = 0; i < added.nr; i++) {
	262	const char *path = added.items[i].path;
fd1c3bf0	263	add_file_to_cache(path, verbose);
11be42a4 JS	264	}
11be42a4 JS	265
09d5dc32 JH	266	for (i = 0; i < deleted.nr; i++)
09d5dc32 JH	267	remove_file_from_cache(deleted.items[i].path);
11be42a4 JS	268
	269	if (active_cache_changed) {
	270	if (write_cache(newfd, active_cache, active_nr) \|\|
30ca07a2	271	commit_locked_index(&lock_file))
11be42a4 JS	272	die("Unable to write new index file");
	273	}
	274	}
	275
	276	return 0;
	277	}