builtin/unpack-file.c

   1 #include "builtin.h"
   2 #include "config.h"
   3 #include "object-store.h"
   4
   5 static char *create_temp_file(struct object_id *oid)
   6 {
   7         static char path[50];
   8         void *buf;
   9         enum object_type type;
  10         unsigned long size;
  11         int fd;
  12
  13         buf = read_object_file(oid, &type, &size);
  14         if (!buf || type != OBJ_BLOB)
  15                 die("unable to read blob object %s", oid_to_hex(oid));
  16
  17         xsnprintf(path, sizeof(path), ".merge_file_XXXXXX");
  18         fd = xmkstemp(path);
  19         if (write_in_full(fd, buf, size) < 0)
  20                 die_errno("unable to write temp-file");
  21         close(fd);
  22         return path;
  23 }
  24
  25 int cmd_unpack_file(int argc, const char **argv, const char *prefix)
  26 {
  27         struct object_id oid;
  28
  29         if (argc != 2 || !strcmp(argv[1], "-h"))
  30                 usage("git unpack-file <sha1>");
  31         if (get_oid(argv[1], &oid))
  32                 die("Not a valid object name %s", argv[1]);
  33
  34         git_config(git_default_config, NULL);
  35
  36         puts(create_temp_file(&oid));
  37         return 0;
  38 }