diff-tree: support list if input trees on stdin
[git] / ls-files.c
1 /*
2  * This merges the file listing in the directory cache index
3  * with the actual working directory list, and shows different
4  * combinations of the two.
5  *
6  * Copyright (C) Linus Torvalds, 2005
7  */
8 #include <dirent.h>
9 #include <fnmatch.h>
10
11 #include "cache.h"
12
13 static int show_deleted = 0;
14 static int show_cached = 0;
15 static int show_others = 0;
16 static int show_ignored = 0;
17 static int show_stage = 0;
18 static int show_unmerged = 0;
19 static int line_terminator = '\n';
20
21 static const char *tag_cached = "";
22 static const char *tag_unmerged = "";
23 static const char *tag_removed = "";
24 static const char *tag_other = "";
25
26 static int nr_excludes;
27 static const char **excludes;
28 static int excludes_alloc;
29
30 static void add_exclude(const char *string)
31 {
32         if (nr_excludes == excludes_alloc) {
33                 excludes_alloc = alloc_nr(excludes_alloc);
34                 excludes = realloc(excludes, excludes_alloc*sizeof(char *));
35         }
36         excludes[nr_excludes++] = string;
37 }
38
39 static void add_excludes_from_file(const char *fname)
40 {
41         int fd, i;
42         long size;
43         char *buf, *entry;
44
45         fd = open(fname, O_RDONLY);
46         if (fd < 0)
47                 goto err;
48         size = lseek(fd, 0, SEEK_END);
49         if (size < 0)
50                 goto err;
51         lseek(fd, 0, SEEK_SET);
52         if (size == 0) {
53                 close(fd);
54                 return;
55         }
56         buf = xmalloc(size);
57         if (read(fd, buf, size) != size)
58                 goto err;
59         close(fd);
60
61         entry = buf;
62         for (i = 0; i < size; i++) {
63                 if (buf[i] == '\n') {
64                         if (entry != buf + i) {
65                                 buf[i] = 0;
66                                 add_exclude(entry);
67                         }
68                         entry = buf + i + 1;
69                 }
70         }
71         return;
72
73 err:    perror(fname);
74         exit(1);
75 }
76
77 static int excluded(const char *pathname)
78 {
79         int i;
80         if (nr_excludes) {
81                 const char *basename = strrchr(pathname, '/');
82                 basename = (basename) ? basename+1 : pathname;
83                 for (i = 0; i < nr_excludes; i++)
84                         if (fnmatch(excludes[i], basename, 0) == 0)
85                                 return 1;
86         }
87         return 0;
88 }
89
90 static const char **dir;
91 static int nr_dir;
92 static int dir_alloc;
93
94 static void add_name(const char *pathname, int len)
95 {
96         char *name;
97
98         if (cache_name_pos(pathname, len) >= 0)
99                 return;
100
101         if (nr_dir == dir_alloc) {
102                 dir_alloc = alloc_nr(dir_alloc);
103                 dir = xrealloc(dir, dir_alloc*sizeof(char *));
104         }
105         name = xmalloc(len + 1);
106         memcpy(name, pathname, len + 1);
107         dir[nr_dir++] = name;
108 }
109
110 /*
111  * Read a directory tree. We currently ignore anything but
112  * directories and regular files. That's because git doesn't
113  * handle them at all yet. Maybe that will change some day.
114  *
115  * Also, we currently ignore all names starting with a dot.
116  * That likely will not change.
117  */
118 static void read_directory(const char *path, const char *base, int baselen)
119 {
120         DIR *dir = opendir(path);
121
122         if (dir) {
123                 struct dirent *de;
124                 char fullname[MAXPATHLEN + 1];
125                 memcpy(fullname, base, baselen);
126
127                 while ((de = readdir(dir)) != NULL) {
128                         int len;
129
130                         if (de->d_name[0] == '.')
131                                 continue;
132                         if (excluded(de->d_name) != show_ignored)
133                                 continue;
134                         len = strlen(de->d_name);
135                         memcpy(fullname + baselen, de->d_name, len+1);
136
137                         switch (DTYPE(de)) {
138                         struct stat st;
139                         default:
140                                 continue;
141                         case DT_UNKNOWN:
142                                 if (lstat(fullname, &st))
143                                         continue;
144                                 if (S_ISREG(st.st_mode))
145                                         break;
146                                 if (!S_ISDIR(st.st_mode))
147                                         continue;
148                                 /* fallthrough */
149                         case DT_DIR:
150                                 memcpy(fullname + baselen + len, "/", 2);
151                                 read_directory(fullname, fullname,
152                                                baselen + len + 1);
153                                 continue;
154                         case DT_REG:
155                                 break;
156                         }
157                         add_name(fullname, baselen + len);
158                 }
159                 closedir(dir);
160         }
161 }
162
163 static int cmp_name(const void *p1, const void *p2)
164 {
165         const char *n1 = *(const char **)p1;
166         const char *n2 = *(const char **)p2;
167         int l1 = strlen(n1), l2 = strlen(n2);
168
169         return cache_name_compare(n1, l1, n2, l2);
170 }
171
172 static void show_files(void)
173 {
174         int i;
175
176         /* For cached/deleted files we don't need to even do the readdir */
177         if (show_others) {
178                 read_directory(".", "", 0);
179                 qsort(dir, nr_dir, sizeof(char *), cmp_name);
180                 for (i = 0; i < nr_dir; i++)
181                         printf("%s%s%c", tag_other, dir[i], line_terminator);
182         }
183         if (show_cached | show_stage) {
184                 for (i = 0; i < active_nr; i++) {
185                         struct cache_entry *ce = active_cache[i];
186                         if (excluded(ce->name) != show_ignored)
187                                 continue;
188                         if (show_unmerged && !ce_stage(ce))
189                                 continue;
190                         if (!show_stage)
191                                 printf("%s%s%c",
192                                        ce_stage(ce) ? tag_unmerged :
193                                        tag_cached,
194                                        ce->name, line_terminator);
195                         else
196                                 printf("%s%06o %s %d %s%c",
197                                        ce_stage(ce) ? tag_unmerged :
198                                        tag_cached,
199                                        ntohl(ce->ce_mode),
200                                        sha1_to_hex(ce->sha1),
201                                        ce_stage(ce),
202                                        ce->name, line_terminator); 
203                 }
204         }
205         if (show_deleted) {
206                 for (i = 0; i < active_nr; i++) {
207                         struct cache_entry *ce = active_cache[i];
208                         struct stat st;
209                         if (excluded(ce->name) != show_ignored)
210                                 continue;
211                         if (!lstat(ce->name, &st))
212                                 continue;
213                         printf("%s%s%c", tag_removed, ce->name,
214                                line_terminator);
215                 }
216         }
217 }
218
219 static const char *ls_files_usage =
220         "ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged])* "
221         "[ --ignored [--exclude=<pattern>] [--exclude-from=<file>) ]";
222
223 int main(int argc, char **argv)
224 {
225         int i;
226
227         for (i = 1; i < argc; i++) {
228                 char *arg = argv[i];
229
230                 if (!strcmp(arg, "-z")) {
231                         line_terminator = 0;
232                 } else if (!strcmp(arg, "-t")) {
233                         tag_cached = "H ";
234                         tag_unmerged = "M ";
235                         tag_removed = "R ";
236                         tag_other = "? ";
237                 } else if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
238                         show_cached = 1;
239                 } else if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
240                         show_deleted = 1;
241                 } else if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
242                         show_others = 1;
243                 } else if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
244                         show_ignored = 1;
245                 } else if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
246                         show_stage = 1;
247                 } else if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
248                         /* There's no point in showing unmerged unless
249                          * you also show the stage information.
250                          */
251                         show_stage = 1;
252                         show_unmerged = 1;
253                 } else if (!strcmp(arg, "-x") && i+1 < argc) {
254                         add_exclude(argv[++i]);
255                 } else if (!strncmp(arg, "--exclude=", 10)) {
256                         add_exclude(arg+10);
257                 } else if (!strcmp(arg, "-X") && i+1 < argc) {
258                         add_excludes_from_file(argv[++i]);
259                 } else if (!strncmp(arg, "--exclude-from=", 15)) {
260                         add_excludes_from_file(arg+15);
261                 } else
262                         usage(ls_files_usage);
263         }
264
265         if (show_ignored && !nr_excludes) {
266                 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
267                         argv[0]);
268                 exit(1);
269         }
270
271         /* With no flags, we default to showing the cached files */
272         if (!(show_stage | show_deleted | show_others | show_unmerged))
273                 show_cached = 1;
274
275         read_cache();
276         show_files();
277         return 0;
278 }