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 <sys/param.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
  18 static const char **dir;
  19 static int nr_dir;
  20 static int dir_alloc;
  21
  22 static void add_name(const char *pathname, int len)
  23 {
  24         char *name;
  25
  26         if (cache_name_pos(pathname, len) >= 0)
  27                 return;
  28
  29         if (nr_dir == dir_alloc) {
  30                 dir_alloc = alloc_nr(dir_alloc);
  31                 dir = realloc(dir, dir_alloc*sizeof(char *));
  32         }
  33         name = malloc(len + 1);
  34         memcpy(name, pathname, len + 1);
  35         dir[nr_dir++] = name;
  36 }
  37
  38 /*
  39  * Read a directory tree. We currently ignore anything but
  40  * directories and regular files. That's because git doesn't
  41  * handle them at all yet. Maybe that will change some day.
  42  *
  43  * Also, we currently ignore all names starting with a dot.
  44  * That likely will not change.
  45  */
  46 static void read_directory(const char *path, const char *base, int baselen)
  47 {
  48         DIR *dir = opendir(path);
  49
  50         if (dir) {
  51                 struct dirent *de;
  52                 char fullname[MAXPATHLEN + 1];
  53                 memcpy(fullname, base, baselen);
  54
  55                 while ((de = readdir(dir)) != NULL) {
  56                         int len;
  57
  58                         if (de->d_name[0] == '.')
  59                                 continue;
  60                         len = strlen(de->d_name);
  61                         memcpy(fullname + baselen, de->d_name, len+1);
  62
  63                         switch (de->d_type) {
  64                         struct stat st;
  65                         default:
  66                                 continue;
  67                         case DT_UNKNOWN:
  68                                 if (lstat(fullname, &st))
  69                                         continue;
  70                                 if (S_ISREG(st.st_mode))
  71                                         break;
  72                                 if (!S_ISDIR(st.st_mode))
  73                                         continue;
  74                                 /* fallthrough */
  75                         case DT_DIR:
  76                                 memcpy(fullname + baselen + len, "/", 2);
  77                                 read_directory(fullname, fullname, baselen + len + 1);
  78                                 continue;
  79                         case DT_REG:
  80                                 break;
  81                         }
  82                         add_name(fullname, baselen + len);
  83                 }
  84                 closedir(dir);
  85         }
  86 }
  87
  88 static int cmp_name(const void *p1, const void *p2)
  89 {
  90         const char *n1 = *(const char **)p1;
  91         const char *n2 = *(const char **)p2;
  92         int l1 = strlen(n1), l2 = strlen(n2);
  93
  94         return cache_name_compare(n1, l1, n2, l2);
  95 }
  96
  97 static void show_files(void)
  98 {
  99         int i;
 100
 101         /* For cached/deleted files we don't need to even do the readdir */
 102         if (show_others | show_ignored) {
 103                 read_directory(".", "", 0);
 104                 qsort(dir, nr_dir, sizeof(char *), cmp_name);
 105         }
 106         if (show_others) {
 107                 for (i = 0; i < nr_dir; i++)
 108                         printf("%s\n", dir[i]);
 109         }
 110         if (show_cached) {
 111                 for (i = 0; i < active_nr; i++) {
 112                         struct cache_entry *ce = active_cache[i];
 113                         printf("%s\n", ce->name);
 114                 }
 115         }
 116         if (show_deleted) {
 117                 for (i = 0; i < active_nr; i++) {
 118                         struct cache_entry *ce = active_cache[i];
 119                         struct stat st;
 120                         if (!stat(ce->name, &st))
 121                                 continue;
 122                         printf("%s\n", ce->name);
 123                 }
 124         }
 125         if (show_ignored) {
 126                 /* We don't have any "ignore" list yet */
 127         }
 128 }
 129
 130 int main(int argc, char **argv)
 131 {
 132         int i;
 133
 134         for (i = 1; i < argc; i++) {
 135                 char *arg = argv[i];
 136
 137                 if (!strcmp(arg, "--cached")) {
 138                         show_cached = 1;
 139                         continue;
 140                 }
 141                 if (!strcmp(arg, "--deleted")) {
 142                         show_deleted = 1;
 143                         continue;
 144                 }
 145                 if (!strcmp(arg, "--others")) {
 146                         show_others = 1;
 147                         continue;
 148                 }
 149                 if (!strcmp(arg, "--ignored")) {
 150                         show_ignored = 1;
 151                         continue;
 152                 }
 153
 154                 usage("show-files (--[cached|deleted|others|ignored])*");
 155         }
 156
 157         /* With no flags, we default to showing the cached files */
 158         if (!(show_cached | show_deleted | show_others | show_ignored))
 159                 show_cached = 1;
 160
 161         read_cache();
 162         show_files();
 163         return 0;
 164 }