unpack-file.c

   1 #include "cache.h"
   2 #include "blob.h"
   3
   4 static char *create_temp_file(unsigned char *sha1)
   5 {
   6         static char path[50];
   7         void *buf;
   8         enum object_type type;
   9         unsigned long size;
  10         int fd;
  11
  12         buf = read_sha1_file(sha1, &type, &size);
  13         if (!buf || type != OBJ_BLOB)
  14                 die("unable to read blob object %s", sha1_to_hex(sha1));
  15
  16         strcpy(path, ".merge_file_XXXXXX");
  17         fd = mkstemp(path);
  18         if (fd < 0)
  19                 die("unable to create temp-file");
  20         if (write_in_full(fd, buf, size) != size)
  21                 die("unable to write temp-file");
  22         close(fd);
  23         return path;
  24 }
  25
  26 int main(int argc, char **argv)
  27 {
  28         unsigned char sha1[20];
  29
  30         if (argc != 2)
  31                 usage("git-unpack-file <sha1>");
  32         if (get_sha1(argv[1], sha1))
  33                 die("Not a valid object name %s", argv[1]);
  34
  35         setup_git_directory();
  36         git_config(git_default_config);
  37
  38         puts(create_temp_file(sha1));
  39         return 0;
  40 }