builtin/unpack-file.c

   1 #include "builtin.h"
   2 #include "config.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         xsnprintf(path, sizeof(path), ".merge_file_XXXXXX");
  17         fd = xmkstemp(path);
  18         if (write_in_full(fd, buf, size) != size)
  19                 die_errno("unable to write temp-file");
  20         close(fd);
  21         return path;
  22 }
  23
  24 int cmd_unpack_file(int argc, const char **argv, const char *prefix)
  25 {
  26         unsigned char sha1[20];
  27
  28         if (argc != 2 || !strcmp(argv[1], "-h"))
  29                 usage("git unpack-file <sha1>");
  30         if (get_sha1(argv[1], sha1))
  31                 die("Not a valid object name %s", argv[1]);
  32
  33         git_config(git_default_config, NULL);
  34
  35         puts(create_temp_file(sha1));
  36         return 0;
  37 }