/*

 * GIT - The information manager from hell

 *

 * Copyright (C) Linus Torvalds, 2005

 */

#include "builtin.h"

#include "config.h"

#include "environment.h"

#include "gettext.h"

#include "hex.h"

#include "tree.h"

#include "cache-tree.h"

#include "parse-options.h"

#include "repository.h"

static const char * const write_tree_usage[] = {

  N_("git write-tree [--missing-ok] [--prefix=<prefix>/]"),

  NULL

};

int cmd_write_tree(int argc, const char **argv, const char *cmd_prefix)

{

  int flags = 0, ret;

  const char *tree_prefix = NULL;

  struct object_id oid;

  const char *me = "git-write-tree";

  struct option write_tree_options[] = {

    OPT_BIT(0, "missing-ok", &flags, N_("allow missing objects"),

      WRITE_TREE_MISSING_OK),

    OPT_STRING(0, "prefix", &tree_prefix, N_("<prefix>/"),

         N_("write tree object for a subdirectory <prefix>")),

    { OPTION_BIT, 0, "ignore-cache-tree", &flags, NULL,

      N_("only useful for debugging"),

      PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, NULL,

      WRITE_TREE_IGNORE_CACHE_TREE },

    OPT_END()

  };

  git_config(git_default_config, NULL);

  argc = parse_options(argc, argv, cmd_prefix, write_tree_options,

           write_tree_usage, 0);

  prepare_repo_settings(the_repository);

  the_repository->settings.command_requires_full_index = 0;

  ret = write_index_as_tree(&oid, the_repository->index, get_index_file(),

          flags, tree_prefix);

  switch (ret) {

  case 0:

    printf("%s\n", oid_to_hex(&oid));

    break;

  case WRITE_TREE_UNREADABLE_INDEX:

    die("%s: error reading the index", me);

    break;

  case WRITE_TREE_UNMERGED_INDEX:

    die("%s: error building trees", me);

    break;

  case WRITE_TREE_PREFIX_ERROR:

    die("%s: prefix %s not found", me, tree_prefix);

    break;

  }

  return ret;

}