hash-object.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  * Copyright (C) Junio C Hamano, 2005
   6  */
   7 #include "cache.h"
   8
   9 static void hash_object(const char *path, const char *type, int write_object)
  10 {
  11         int fd;
  12         struct stat st;
  13         unsigned char sha1[20];
  14         fd = open(path, O_RDONLY);
  15         if (fd < 0 ||
  16             fstat(fd, &st) < 0 ||
  17             index_fd(sha1, fd, &st, write_object, type))
  18                 die(write_object
  19                     ? "Unable to add %s to database"
  20                     : "Unable to hash %s", path);
  21         printf("%s\n", sha1_to_hex(sha1));
  22 }
  23
  24 static const char hash_object_usage[] =
  25 "git-hash-object [-t <type>] [-w] <file>...";
  26
  27 int main(int argc, char **argv)
  28 {
  29         int i;
  30         const char *type = "blob";
  31         int write_object = 0;
  32         const char *prefix = NULL;
  33         int prefix_length = -1;
  34
  35         for (i = 1 ; i < argc; i++) {
  36                 if (!strcmp(argv[i], "-t")) {
  37                         if (argc <= ++i)
  38                                 die(hash_object_usage);
  39                         type = argv[i];
  40                 }
  41                 else if (!strcmp(argv[i], "-w")) {
  42                         if (prefix_length < 0) {
  43                                 prefix = setup_git_directory();
  44                                 prefix_length = prefix ? strlen(prefix) : 0;
  45                         }
  46                         write_object = 1;
  47                 }
  48                 else {
  49                         const char *arg = argv[i];
  50                         if (0 <= prefix_length)
  51                                 arg = prefix_filename(prefix, prefix_length,
  52                                                       arg);
  53                         hash_object(arg, type, write_object);
  54                 }
  55         }
  56         return 0;
  57 }