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 }