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