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 show_killed = 0;
  20 static int line_terminator = '\n';
  21
  22 static const char *tag_cached = "";
  23 static const char *tag_unmerged = "";
  24 static const char *tag_removed = "";
  25 static const char *tag_other = "";
  26 static const char *tag_killed = "";
  27
  28 static int nr_excludes;
  29 static const char **excludes;
  30 static int excludes_alloc;
  31
  32 static void add_exclude(const char *string)
  33 {
  34         if (nr_excludes == excludes_alloc) {
  35                 excludes_alloc = alloc_nr(excludes_alloc);
  36                 excludes = realloc(excludes, excludes_alloc*sizeof(char *));
  37         }
  38         excludes[nr_excludes++] = string;
  39 }
  40
  41 static void add_excludes_from_file(const char *fname)
  42 {
  43         int fd, i;
  44         long size;
  45         char *buf, *entry;
  46
  47         fd = open(fname, O_RDONLY);
  48         if (fd < 0)
  49                 goto err;
  50         size = lseek(fd, 0, SEEK_END);
  51         if (size < 0)
  52                 goto err;
  53         lseek(fd, 0, SEEK_SET);
  54         if (size == 0) {
  55                 close(fd);
  56                 return;
  57         }
  58         buf = xmalloc(size);
  59         if (read(fd, buf, size) != size)
  60                 goto err;
  61         close(fd);
  62
  63         entry = buf;
  64         for (i = 0; i < size; i++) {
  65                 if (buf[i] == '\n') {
  66                         if (entry != buf + i) {
  67                                 buf[i] = 0;
  68                                 add_exclude(entry);
  69                         }
  70                         entry = buf + i + 1;
  71                 }
  72         }
  73         return;
  74
  75 err:    perror(fname);
  76         exit(1);
  77 }
  78
  79 static int excluded(const char *pathname)
  80 {
  81         int i;
  82         if (nr_excludes) {
  83                 const char *basename = strrchr(pathname, '/');
  84                 basename = (basename) ? basename+1 : pathname;
  85                 for (i = 0; i < nr_excludes; i++)
  86                         if (fnmatch(excludes[i], basename, 0) == 0)
  87                                 return 1;
  88         }
  89         return 0;
  90 }
  91
  92 struct nond_on_fs {
  93         int len;
  94         char name[0];
  95 };
  96
  97 static struct nond_on_fs **dir;
  98 static int nr_dir;
  99 static int dir_alloc;
 100
 101 static void add_name(const char *pathname, int len)
 102 {
 103         struct nond_on_fs *ent;
 104
 105         if (cache_name_pos(pathname, len) >= 0)
 106                 return;
 107
 108         if (nr_dir == dir_alloc) {
 109                 dir_alloc = alloc_nr(dir_alloc);
 110                 dir = xrealloc(dir, dir_alloc*sizeof(ent));
 111         }
 112         ent = xmalloc(sizeof(*ent) + len + 1);
 113         ent->len = len;
 114         memcpy(ent->name, pathname, len);
 115         dir[nr_dir++] = ent;
 116 }
 117
 118 /*
 119  * Read a directory tree. We currently ignore anything but
 120  * directories, regular files and symlinks. That's because git
 121  * doesn't handle them at all yet. Maybe that will change some
 122  * day.
 123  *
 124  * Also, we currently ignore all names starting with a dot.
 125  * That likely will not change.
 126  */
 127 static void read_directory(const char *path, const char *base, int baselen)
 128 {
 129         DIR *dir = opendir(path);
 130
 131         if (dir) {
 132                 struct dirent *de;
 133                 char fullname[MAXPATHLEN + 1];
 134                 memcpy(fullname, base, baselen);
 135
 136                 while ((de = readdir(dir)) != NULL) {
 137                         int len;
 138
 139                         if (de->d_name[0] == '.')
 140                                 continue;
 141                         if (excluded(de->d_name) != show_ignored)
 142                                 continue;
 143                         len = strlen(de->d_name);
 144                         memcpy(fullname + baselen, de->d_name, len+1);
 145
 146                         switch (DTYPE(de)) {
 147                         struct stat st;
 148                         default:
 149                                 continue;
 150                         case DT_UNKNOWN:
 151                                 if (lstat(fullname, &st))
 152                                         continue;
 153                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
 154                                         break;
 155                                 if (!S_ISDIR(st.st_mode))
 156                                         continue;
 157                                 /* fallthrough */
 158                         case DT_DIR:
 159                                 memcpy(fullname + baselen + len, "/", 2);
 160                                 read_directory(fullname, fullname,
 161                                                baselen + len + 1);
 162                                 continue;
 163                         case DT_REG:
 164                         case DT_LNK:
 165                                 break;
 166                         }
 167                         add_name(fullname, baselen + len);
 168                 }
 169                 closedir(dir);
 170         }
 171 }
 172
 173 static int cmp_name(const void *p1, const void *p2)
 174 {
 175         const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
 176         const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
 177
 178         return cache_name_compare(e1->name, e1->len,
 179                                   e2->name, e2->len);
 180 }
 181
 182 static void show_killed_files()
 183 {
 184         int i;
 185         for (i = 0; i < nr_dir; i++) {
 186                 struct nond_on_fs *ent = dir[i];
 187                 char *cp, *sp;
 188                 int pos, len, killed = 0;
 189
 190                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 191                         sp = strchr(cp, '/');
 192                         if (!sp) {
 193                                 /* If ent->name is prefix of an entry in the
 194                                  * cache, it will be killed.
 195                                  */
 196                                 pos = cache_name_pos(ent->name, ent->len);
 197                                 if (0 <= pos)
 198                                         die("bug in show-killed-files");
 199                                 pos = -pos - 1;
 200                                 while (pos < active_nr &&
 201                                        ce_stage(active_cache[pos]))
 202                                         pos++; /* skip unmerged */
 203                                 if (active_nr <= pos)
 204                                         break;
 205                                 /* pos points at a name immediately after
 206                                  * ent->name in the cache.  Does it expect
 207                                  * ent->name to be a directory?
 208                                  */
 209                                 len = ce_namelen(active_cache[pos]);
 210                                 if ((ent->len < len) &&
 211                                     !strncmp(active_cache[pos]->name,
 212                                              ent->name, ent->len) &&
 213                                     active_cache[pos]->name[ent->len] == '/')
 214                                         killed = 1;
 215                                 break;
 216                         }
 217                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 218                                 /* If any of the leading directories in
 219                                  * ent->name is registered in the cache,
 220                                  * ent->name will be killed.
 221                                  */
 222                                 killed = 1;
 223                                 break;
 224                         }
 225                 }
 226                 if (killed)
 227                         printf("%s%.*s%c", tag_killed,
 228                                dir[i]->len, dir[i]->name,
 229                                line_terminator);
 230         }
 231 }
 232
 233 static void show_files(void)
 234 {
 235         int i;
 236
 237         /* For cached/deleted files we don't need to even do the readdir */
 238         if (show_others || show_killed) {
 239                 read_directory(".", "", 0);
 240                 qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
 241                 if (show_others)
 242                         for (i = 0; i < nr_dir; i++)
 243                                 printf("%s%.*s%c", tag_other,
 244                                        dir[i]->len, dir[i]->name,
 245                                        line_terminator);
 246                 if (show_killed)
 247                         show_killed_files();
 248         }
 249         if (show_cached | show_stage) {
 250                 for (i = 0; i < active_nr; i++) {
 251                         struct cache_entry *ce = active_cache[i];
 252                         if (excluded(ce->name) != show_ignored)
 253                                 continue;
 254                         if (show_unmerged && !ce_stage(ce))
 255                                 continue;
 256                         if (!show_stage)
 257                                 printf("%s%s%c",
 258                                        ce_stage(ce) ? tag_unmerged :
 259                                        tag_cached,
 260                                        ce->name, line_terminator);
 261                         else
 262                                 printf("%s%06o %s %d %s%c",
 263                                        ce_stage(ce) ? tag_unmerged :
 264                                        tag_cached,
 265                                        ntohl(ce->ce_mode),
 266                                        sha1_to_hex(ce->sha1),
 267                                        ce_stage(ce),
 268                                        ce->name, line_terminator);
 269                 }
 270         }
 271         if (show_deleted) {
 272                 for (i = 0; i < active_nr; i++) {
 273                         struct cache_entry *ce = active_cache[i];
 274                         struct stat st;
 275                         if (excluded(ce->name) != show_ignored)
 276                                 continue;
 277                         if (!lstat(ce->name, &st))
 278                                 continue;
 279                         printf("%s%s%c", tag_removed, ce->name,
 280                                line_terminator);
 281                 }
 282         }
 283 }
 284
 285 static const char *ls_files_usage =
 286         "ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged|killed])* "
 287         "[ --ignored [--exclude=<pattern>] [--exclude-from=<file>) ]";
 288
 289 int main(int argc, char **argv)
 290 {
 291         int i;
 292
 293         for (i = 1; i < argc; i++) {
 294                 char *arg = argv[i];
 295
 296                 if (!strcmp(arg, "-z")) {
 297                         line_terminator = 0;
 298                 } else if (!strcmp(arg, "-t")) {
 299                         tag_cached = "H ";
 300                         tag_unmerged = "M ";
 301                         tag_removed = "R ";
 302                         tag_other = "? ";
 303                         tag_killed = "K ";
 304                 } else if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
 305                         show_cached = 1;
 306                 } else if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
 307                         show_deleted = 1;
 308                 } else if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
 309                         show_others = 1;
 310                 } else if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
 311                         show_ignored = 1;
 312                 } else if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
 313                         show_stage = 1;
 314                 } else if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
 315                         show_killed = 1;
 316                 } else if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
 317                         /* There's no point in showing unmerged unless
 318                          * you also show the stage information.
 319                          */
 320                         show_stage = 1;
 321                         show_unmerged = 1;
 322                 } else if (!strcmp(arg, "-x") && i+1 < argc) {
 323                         add_exclude(argv[++i]);
 324                 } else if (!strncmp(arg, "--exclude=", 10)) {
 325                         add_exclude(arg+10);
 326                 } else if (!strcmp(arg, "-X") && i+1 < argc) {
 327                         add_excludes_from_file(argv[++i]);
 328                 } else if (!strncmp(arg, "--exclude-from=", 15)) {
 329                         add_excludes_from_file(arg+15);
 330                 } else
 331                         usage(ls_files_usage);
 332         }
 333
 334         if (show_ignored && !nr_excludes) {
 335                 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
 336                         argv[0]);
 337                 exit(1);
 338         }
 339
 340         /* With no flags, we default to showing the cached files */
 341         if (!(show_stage | show_deleted | show_others | show_unmerged | show_killed))
 342                 show_cached = 1;
 343
 344         read_cache();
 345         show_files();
 346         return 0;
 347 }