builtin/unpack-file.c

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