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 static int line_terminator = '\n';
  18
  19 static const char **dir;
  20 static int nr_dir;
  21 static int dir_alloc;
  22
  23 static void add_name(const char *pathname, int len)
  24 {
  25         char *name;
  26
  27         if (cache_name_pos(pathname, len) >= 0)
  28                 return;
  29
  30         if (nr_dir == dir_alloc) {
  31                 dir_alloc = alloc_nr(dir_alloc);
  32                 dir = realloc(dir, dir_alloc*sizeof(char *));
  33         }
  34         name = malloc(len + 1);
  35         memcpy(name, pathname, len + 1);
  36         dir[nr_dir++] = name;
  37 }
  38
  39 /*
  40  * Read a directory tree. We currently ignore anything but
  41  * directories and regular files. That's because git doesn't
  42  * handle them at all yet. Maybe that will change some day.
  43  *
  44  * Also, we currently ignore all names starting with a dot.
  45  * That likely will not change.
  46  */
  47 static void read_directory(const char *path, const char *base, int baselen)
  48 {
  49         DIR *dir = opendir(path);
  50
  51         if (dir) {
  52                 struct dirent *de;
  53                 char fullname[MAXPATHLEN + 1];
  54                 memcpy(fullname, base, baselen);
  55
  56                 while ((de = readdir(dir)) != NULL) {
  57                         int len;
  58
  59                         if (de->d_name[0] == '.')
  60                                 continue;
  61                         len = strlen(de->d_name);
  62                         memcpy(fullname + baselen, de->d_name, len+1);
  63
  64                         switch (de->d_type) {
  65                         struct stat st;
  66                         default:
  67                                 continue;
  68                         case DT_UNKNOWN:
  69                                 if (lstat(fullname, &st))
  70                                         continue;
  71                                 if (S_ISREG(st.st_mode))
  72                                         break;
  73                                 if (!S_ISDIR(st.st_mode))
  74                                         continue;
  75                                 /* fallthrough */
  76                         case DT_DIR:
  77                                 memcpy(fullname + baselen + len, "/", 2);
  78                                 read_directory(fullname, fullname, baselen + len + 1);
  79                                 continue;
  80                         case DT_REG:
  81                                 break;
  82                         }
  83                         add_name(fullname, baselen + len);
  84                 }
  85                 closedir(dir);
  86         }
  87 }
  88
  89 static int cmp_name(const void *p1, const void *p2)
  90 {
  91         const char *n1 = *(const char **)p1;
  92         const char *n2 = *(const char **)p2;
  93         int l1 = strlen(n1), l2 = strlen(n2);
  94
  95         return cache_name_compare(n1, l1, n2, l2);
  96 }
  97
  98 static void show_files(void)
  99 {
 100         int i;
 101
 102         /* For cached/deleted files we don't need to even do the readdir */
 103         if (show_others | show_ignored) {
 104                 read_directory(".", "", 0);
 105                 qsort(dir, nr_dir, sizeof(char *), cmp_name);
 106         }
 107         if (show_others) {
 108                 for (i = 0; i < nr_dir; i++)
 109                         printf("%s%c", dir[i], line_terminator);
 110         }
 111         if (show_cached) {
 112                 for (i = 0; i < active_nr; i++) {
 113                         struct cache_entry *ce = active_cache[i];
 114                         printf("%s%c", ce->name, line_terminator);
 115                 }
 116         }
 117         if (show_deleted) {
 118                 for (i = 0; i < active_nr; i++) {
 119                         struct cache_entry *ce = active_cache[i];
 120                         struct stat st;
 121                         if (!stat(ce->name, &st))
 122                                 continue;
 123                         printf("%s%c", ce->name, line_terminator);
 124                 }
 125         }
 126         if (show_ignored) {
 127                 /* We don't have any "ignore" list yet */
 128         }
 129 }
 130
 131 int main(int argc, char **argv)
 132 {
 133         int i;
 134
 135         for (i = 1; i < argc; i++) {
 136                 char *arg = argv[i];
 137
 138                 if (!strcmp(arg, "-z")) {
 139                         line_terminator = 0;
 140                         continue;
 141                 }
 142
 143                 if (!strcmp(arg, "--cached")) {
 144                         show_cached = 1;
 145                         continue;
 146                 }
 147                 if (!strcmp(arg, "--deleted")) {
 148                         show_deleted = 1;
 149                         continue;
 150                 }
 151                 if (!strcmp(arg, "--others")) {
 152                         show_others = 1;
 153                         continue;
 154                 }
 155                 if (!strcmp(arg, "--ignored")) {
 156                         show_ignored = 1;
 157                         continue;
 158                 }
 159
 160                 usage("show-files (--[cached|deleted|others|ignored])*");
 161         }
 162
 163         /* With no flags, we default to showing the cached files */
 164         if (!(show_cached | show_deleted | show_others | show_ignored))
 165                 show_cached = 1;
 166
 167         read_cache();
 168         show_files();
 169         return 0;
 170 }