aboutsummaryrefslogtreecommitdiff
path: root/builtin/mv.c
blob: a2014266b6b33d7940627777af9ae860c7850c2d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
/*
 * "git mv" builtin command
 *
 * Copyright (C) 2006 Johannes Schindelin
 */
#include "builtin.h"
#include "lockfile.h"
#include "dir.h"
#include "cache-tree.h"
#include "string-list.h"
#include "parse-options.h"
#include "submodule.h"

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

#define DUP_BASENAME 1
#define KEEP_TRAILING_SLASH 2

static const char **internal_copy_pathspec(const char *prefix,
					   const char **pathspec,
					   int count, unsigned flags)
{
	int i;
	const char **result;
	ALLOC_ARRAY(result, count + 1);
	memcpy(result, pathspec, count * sizeof(const char *));
	result[count] = NULL;
	for (i = 0; i < count; i++) {
		int length = strlen(result[i]);
		int to_copy = length;
		while (!(flags & KEEP_TRAILING_SLASH) &&
		       to_copy > 0 && is_dir_sep(result[i][to_copy - 1]))
			to_copy--;
		if (to_copy != length || flags & DUP_BASENAME) {
			char *it = xmemdupz(result[i], to_copy);
			if (flags & DUP_BASENAME) {
				result[i] = xstrdup(basename(it));
				free(it);
			} else
				result[i] = it;
		}
	}
	return get_pathspec(prefix, result);
}

static const char *add_slash(const char *path)
{
	size_t len = strlen(path);
	if (path[len - 1] != '/') {
		char *with_slash = xmalloc(st_add(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;
#define SUBMODULE_WITH_GITDIR ((const char *)1)

static void prepare_move_submodule(const char *src, int first,
				   const char **submodule_gitfile)
{
	struct strbuf submodule_dotgit = STRBUF_INIT;
	if (!S_ISGITLINK(active_cache[first]->ce_mode))
		die(_("Directory %s is in index and no submodule?"), src);
	if (!is_staging_gitmodules_ok())
		die(_("Please stage your changes to .gitmodules or stash them to proceed"));
	strbuf_addf(&submodule_dotgit, "%s/.git", src);
	*submodule_gitfile = read_gitfile(submodule_dotgit.buf);
	if (*submodule_gitfile)
		*submodule_gitfile = xstrdup(*submodule_gitfile);
	else
		*submodule_gitfile = SUBMODULE_WITH_GITDIR;
	strbuf_release(&submodule_dotgit);
}

static int index_range_of_same_dir(const char *src, int length,
				   int *first_p, int *last_p)
{
	const char *src_w_slash = add_slash(src);
	int first, last, len_w_slash = length + 1;

	first = cache_name_pos(src_w_slash, len_w_slash);
	if (first >= 0)
		die(_("%.*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;
	}
	if (src_w_slash != src)
		free((char *)src_w_slash);
	*first_p = first;
	*last_p = last;
	return last - first;
}

int cmd_mv(int argc, const char **argv, const char *prefix)
{
	int i, gitmodules_modified = 0;
	int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
	struct option builtin_mv_options[] = {
		OPT__VERBOSE(&verbose, N_("be verbose")),
		OPT__DRY_RUN(&show_only, N_("dry run")),
		OPT__FORCE(&force, N_("force move/rename even if target exists")),
		OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
		OPT_END(),
	};
	const char **source, **destination, **dest_path, **submodule_gitfile;
	enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
	struct stat st;
	struct string_list src_for_dst = STRING_LIST_INIT_NODUP;

	gitmodules_config();
	git_config(git_default_config, NULL);

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

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

	source = internal_copy_pathspec(prefix, argv, argc, 0);
	modes = xcalloc(argc, sizeof(enum update_mode));
	/*
	 * Keep trailing slash, needed to let
	 * "git mv file no-such-dir/" error out.
	 */
	dest_path = internal_copy_pathspec(prefix, argv + argc, 1,
					   KEEP_TRAILING_SLASH);
	submodule_gitfile = xcalloc(argc, sizeof(char *));

	if (dest_path[0][0] == '\0')
		/* special case: "." was normalized to "" */
		destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
	else if (!lstat(dest_path[0], &st) &&
			S_ISDIR(st.st_mode)) {
		dest_path[0] = add_slash(dest_path[0]);
		destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
	} else {
		if (argc != 1)
			die(_("destination '%s' is not a directory"), dest_path[0]);
		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) {
			int first = cache_name_pos(src, length), last;

			if (first >= 0)
				prepare_move_submodule(src, first,
						       submodule_gitfile + i);
			else if (index_range_of_same_dir(src, length,
							 &first, &last) < 1)
				bad = _("source directory is empty");
			else { /* last - first >= 1 */
				int j, dst_len, n;

				modes[i] = WORKING_DIRECTORY;
				n = argc + last - first;
				REALLOC_ARRAY(source, n);
				REALLOC_ARRAY(destination, n);
				REALLOC_ARRAY(modes, n);
				REALLOC_ARRAY(submodule_gitfile, n);

				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;
					submodule_gitfile[argc + j] = NULL;
				}
				argc += last - first;
			}
		} else if (cache_name_pos(src, length) < 0)
			bad = _("not under version control");
		else if (lstat(dst, &st) == 0 &&
			 (!ignore_case || strcasecmp(src, dst))) {
			bad = _("destination exists");
			if (force) {
				/*
				 * only files can overwrite each other:
				 * check both source and destination
				 */
				if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
					if (verbose)
						warning(_("overwriting '%s'"), dst);
					bad = NULL;
				} else
					bad = _("Cannot overwrite");
			}
		} else if (string_list_has_string(&src_for_dst, dst))
			bad = _("multiple sources for the same target");
		else if (is_dir_sep(dst[strlen(dst) - 1]))
			bad = _("destination directory does not exist");
		else
			string_list_insert(&src_for_dst, dst);

		if (!bad)
			continue;
		if (!ignore_errors)
			die(_("%s, source=%s, destination=%s"),
			     bad, src, dst);
		if (--argc > 0) {
			int n = argc - i;
			memmove(source + i, source + i + 1,
				n * sizeof(char *));
			memmove(destination + i, destination + i + 1,
				n * sizeof(char *));
			memmove(modes + i, modes + i + 1,
				n * sizeof(enum update_mode));
			memmove(submodule_gitfile + i, submodule_gitfile + i + 1,
				n * sizeof(char *));
			i--;
		}
	}

	for (i = 0; i < argc; i++) {
		const char *src = source[i], *dst = destination[i];
		enum update_mode mode = modes[i];
		int pos;
		if (show_only || verbose)
			printf(_("Renaming %s to %s\n"), src, dst);
		if (show_only)
			continue;
		if (mode != INDEX && rename(src, dst) < 0) {
			if (ignore_errors)
				continue;
			die_errno(_("renaming '%s' failed"), src);
		}
		if (submodule_gitfile[i]) {
			if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
				connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
			if (!update_path_in_gitmodules(src, dst))
				gitmodules_modified = 1;
		}

		if (mode == WORKING_DIRECTORY)
			continue;

		pos = cache_name_pos(src, strlen(src));
		assert(pos >= 0);
		if (!show_only)
			rename_cache_entry_at(pos, dst);
	}

	if (gitmodules_modified)
		stage_updated_gitmodules();

	if (active_cache_changed &&
	    write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
		die(_("Unable to write new index file"));

	return 0;
}