#include "builtin.h"

#include "config.h"

#include "hex.h"

#include "object-name.h"

#include "object-store-ll.h"

static char *create_temp_file(struct object_id *oid)

{

  static char path[50];

  void *buf;

  enum object_type type;

  unsigned long size;

  int fd;

  buf = repo_read_object_file(the_repository, oid, &type, &size);

  if (!buf || type != OBJ_BLOB)

    die("unable to read blob object %s", oid_to_hex(oid));

  xsnprintf(path, sizeof(path), ".merge_file_XXXXXX");

  fd = xmkstemp(path);

  if (write_in_full(fd, buf, size) < 0)

    die_errno("unable to write temp-file");

  close(fd);

  free(buf);

  return path;

}

int cmd_unpack_file(int argc, const char **argv, const char *prefix UNUSED)

{

  struct object_id oid;

  if (argc != 2 || !strcmp(argv[1], "-h"))

    usage("git unpack-file <blob>");

  if (repo_get_oid(the_repository, argv[1], &oid))

    die("Not a valid object name %s", argv[1]);

  git_config(git_default_config, NULL);

  puts(create_temp_file(&oid));

  return 0;

}