init-db.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  */
   6 #include "cache.h"
   7
   8 int main(int argc, char **argv)
   9 {
  10         char *sha1_dir = getenv(DB_ENVIRONMENT), *path;
  11         int len, i;
  12
  13         if (mkdir(".git", 0755) < 0) {
  14                 perror("unable to create .git directory");
  15                 exit(1);
  16         }
  17
  18         /*
  19          * If you want to, you can share the DB area with any number of branches.
  20          * That has advantages: you can save space by sharing all the SHA1 objects.
  21          * On the other hand, it might just make lookup slower and messier. You
  22          * be the judge.
  23          */
  24         sha1_dir = getenv(DB_ENVIRONMENT);
  25         if (sha1_dir) {
  26                 struct stat st;
  27                 if (!stat(sha1_dir, &st) < 0 && S_ISDIR(st.st_mode))
  28                         return 0;
  29                 fprintf(stderr, "DB_ENVIRONMENT set to bad directory %s: ", sha1_dir);
  30         }
  31
  32         /*
  33          * The default case is to have a DB per managed directory.
  34          */
  35         sha1_dir = DEFAULT_DB_ENVIRONMENT;
  36         fprintf(stderr, "defaulting to private storage area\n");
  37         len = strlen(sha1_dir);
  38         if (mkdir(sha1_dir, 0755) < 0) {
  39                 if (errno != EEXIST) {
  40                         perror(sha1_dir);
  41                         exit(1);
  42                 }
  43         }
  44         path = malloc(len + 40);
  45         memcpy(path, sha1_dir, len);
  46         for (i = 0; i < 256; i++) {
  47                 sprintf(path+len, "/%02x", i);
  48                 if (mkdir(path, 0755) < 0) {
  49                         if (errno != EEXIST) {
  50                                 perror(path);
  51                                 exit(1);
  52                         }
  53                 }
  54         }
  55         return 0;
  56 }