summaryrefslogtreecommitdiff
path: root/ls-files.c
blob: c6c32d94b0755550a97544708ce71885c02a4b68 (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
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
/*
 * This merges the file listing in the directory cache index
 * with the actual working directory list, and shows different
 * combinations of the two.
 *
 * Copyright (C) Linus Torvalds, 2005
 */
#include <dirent.h>
#include <fnmatch.h>

#include "cache.h"

static int show_deleted = 0;
static int show_cached = 0;
static int show_others = 0;
static int show_ignored = 0;
static int show_stage = 0;
static int show_unmerged = 0;
static int show_killed = 0;
static int line_terminator = '\n';

static const char *tag_cached = "";
static const char *tag_unmerged = "";
static const char *tag_removed = "";
static const char *tag_other = "";
static const char *tag_killed = "";

static int nr_excludes;
static const char **excludes;
static int excludes_alloc;

static void add_exclude(const char *string)
{
	if (nr_excludes == excludes_alloc) {
		excludes_alloc = alloc_nr(excludes_alloc);
		excludes = realloc(excludes, excludes_alloc*sizeof(char *));
	}
	excludes[nr_excludes++] = string;
}

static void add_excludes_from_file(const char *fname)
{
	int fd, i;
	long size;
	char *buf, *entry;

	fd = open(fname, O_RDONLY);
	if (fd < 0)
		goto err;
	size = lseek(fd, 0, SEEK_END);
	if (size < 0)
		goto err;
	lseek(fd, 0, SEEK_SET);
	if (size == 0) {
		close(fd);
		return;
	}
	buf = xmalloc(size);
	if (read(fd, buf, size) != size)
		goto err;
	close(fd);

	entry = buf;
	for (i = 0; i < size; i++) {
		if (buf[i] == '\n') {
			if (entry != buf + i) {
				buf[i] = 0;
				add_exclude(entry);
			}
			entry = buf + i + 1;
		}
	}
	return;

err:	perror(fname);
	exit(1);
}

static int excluded(const char *pathname)
{
	int i;
	if (nr_excludes) {
		const char *basename = strrchr(pathname, '/');
		basename = (basename) ? basename+1 : pathname;
		for (i = 0; i < nr_excludes; i++)
			if (fnmatch(excludes[i], basename, 0) == 0)
				return 1;
	}
	return 0;
}

struct nond_on_fs {
	int len;
	char name[0];
};

static struct nond_on_fs **dir;
static int nr_dir;
static int dir_alloc;

static void add_name(const char *pathname, int len)
{
	struct nond_on_fs *ent;

	if (cache_name_pos(pathname, len) >= 0)
		return;

	if (nr_dir == dir_alloc) {
		dir_alloc = alloc_nr(dir_alloc);
		dir = xrealloc(dir, dir_alloc*sizeof(ent));
	}
	ent = xmalloc(sizeof(*ent) + len + 1);
	ent->len = len;
	memcpy(ent->name, pathname, len);
	dir[nr_dir++] = ent;
}

/*
 * Read a directory tree. We currently ignore anything but
 * directories, regular files and symlinks. That's because git
 * doesn't handle them at all yet. Maybe that will change some
 * day.
 *
 * Also, we currently ignore all names starting with a dot.
 * That likely will not change.
 */
static void read_directory(const char *path, const char *base, int baselen)
{
	DIR *dir = opendir(path);

	if (dir) {
		struct dirent *de;
		char fullname[MAXPATHLEN + 1];
		memcpy(fullname, base, baselen);

		while ((de = readdir(dir)) != NULL) {
			int len;

			if ((de->d_name[0] == '.') &&
			    (de->d_name[1] == 0 ||
			     !strcmp(de->d_name + 1, ".") ||
			     !strcmp(de->d_name + 1, "git")))
				continue;
			if (excluded(de->d_name) != show_ignored)
				continue;
			len = strlen(de->d_name);
			memcpy(fullname + baselen, de->d_name, len+1);

			switch (DTYPE(de)) {
			struct stat st;
			default:
				continue;
			case DT_UNKNOWN:
				if (lstat(fullname, &st))
					continue;
				if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
					break;
				if (!S_ISDIR(st.st_mode))
					continue;
				/* fallthrough */
			case DT_DIR:
				memcpy(fullname + baselen + len, "/", 2);
				read_directory(fullname, fullname,
					       baselen + len + 1);
				continue;
			case DT_REG:
			case DT_LNK:
				break;
			}
			add_name(fullname, baselen + len);
		}
		closedir(dir);
	}
}

static int cmp_name(const void *p1, const void *p2)
{
	const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
	const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;

	return cache_name_compare(e1->name, e1->len,
				  e2->name, e2->len);
}

static void show_killed_files(void)
{
	int i;
	for (i = 0; i < nr_dir; i++) {
		struct nond_on_fs *ent = dir[i];
		char *cp, *sp;
		int pos, len, killed = 0;

		for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
			sp = strchr(cp, '/');
			if (!sp) {
				/* If ent->name is prefix of an entry in the
				 * cache, it will be killed.
				 */
				pos = cache_name_pos(ent->name, ent->len);
				if (0 <= pos)
					die("bug in show-killed-files");
				pos = -pos - 1;
				while (pos < active_nr &&
				       ce_stage(active_cache[pos]))
					pos++; /* skip unmerged */
				if (active_nr <= pos)
					break;
				/* pos points at a name immediately after
				 * ent->name in the cache.  Does it expect
				 * ent->name to be a directory?
				 */
				len = ce_namelen(active_cache[pos]);
				if ((ent->len < len) &&
				    !strncmp(active_cache[pos]->name,
					     ent->name, ent->len) &&
				    active_cache[pos]->name[ent->len] == '/')
					killed = 1;
				break;
			}
			if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
				/* If any of the leading directories in
				 * ent->name is registered in the cache,
				 * ent->name will be killed.
				 */
				killed = 1;
				break;
			}
		}
		if (killed)
			printf("%s%.*s%c", tag_killed,
			       dir[i]->len, dir[i]->name,
			       line_terminator);
	}
}

static void show_files(void)
{
	int i;

	/* For cached/deleted files we don't need to even do the readdir */
	if (show_others || show_killed) {
		read_directory(".", "", 0);
		qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
		if (show_others)
			for (i = 0; i < nr_dir; i++)
				printf("%s%.*s%c", tag_other,
				       dir[i]->len, dir[i]->name,
				       line_terminator);
		if (show_killed)
			show_killed_files();
	}
	if (show_cached | show_stage) {
		for (i = 0; i < active_nr; i++) {
			struct cache_entry *ce = active_cache[i];
			if (excluded(ce->name) != show_ignored)
				continue;
			if (show_unmerged && !ce_stage(ce))
				continue;
			if (!show_stage)
				printf("%s%s%c",
				       ce_stage(ce) ? tag_unmerged :
				       tag_cached,
				       ce->name, line_terminator);
			else
				printf("%s%06o %s %d\t%s%c",
				       ce_stage(ce) ? tag_unmerged :
				       tag_cached,
				       ntohl(ce->ce_mode),
				       sha1_to_hex(ce->sha1),
				       ce_stage(ce),
				       ce->name, line_terminator); 
		}
	}
	if (show_deleted) {
		for (i = 0; i < active_nr; i++) {
			struct cache_entry *ce = active_cache[i];
			struct stat st;
			if (excluded(ce->name) != show_ignored)
				continue;
			if (!lstat(ce->name, &st))
				continue;
			printf("%s%s%c", tag_removed, ce->name,
			       line_terminator);
		}
	}
}

static const char *ls_files_usage =
	"git-ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged|killed])* "
	"[ --ignored [--exclude=<pattern>] [--exclude-from=<file>) ]";

int main(int argc, char **argv)
{
	int i;

	for (i = 1; i < argc; i++) {
		char *arg = argv[i];

		if (!strcmp(arg, "-z")) {
			line_terminator = 0;
		} else if (!strcmp(arg, "-t")) {
			tag_cached = "H ";
			tag_unmerged = "M ";
			tag_removed = "R ";
			tag_other = "? ";
			tag_killed = "K ";
		} else if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
			show_cached = 1;
		} else if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
			show_deleted = 1;
		} else if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
			show_others = 1;
		} else if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
			show_ignored = 1;
		} else if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
			show_stage = 1;
		} else if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
			show_killed = 1;
		} else if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
			/* There's no point in showing unmerged unless
			 * you also show the stage information.
			 */
			show_stage = 1;
			show_unmerged = 1;
		} else if (!strcmp(arg, "-x") && i+1 < argc) {
			add_exclude(argv[++i]);
		} else if (!strncmp(arg, "--exclude=", 10)) {
			add_exclude(arg+10);
		} else if (!strcmp(arg, "-X") && i+1 < argc) {
			add_excludes_from_file(argv[++i]);
		} else if (!strncmp(arg, "--exclude-from=", 15)) {
			add_excludes_from_file(arg+15);
		} else
			usage(ls_files_usage);
	}

	if (show_ignored && !nr_excludes) {
		fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
			argv[0]);
		exit(1);
	}

	/* With no flags, we default to showing the cached files */
	if (!(show_stage | show_deleted | show_others | show_unmerged | show_killed))
		show_cached = 1;

	read_cache();
	show_files();
	return 0;
}