/*

 * Builtin "git commit-commit"

 *

 * Copyright (c) 2014 Michael J Gruber <git@drmicha.warpmail.net>

 *

 * Based on git-verify-tag

 */

#include "builtin.h"

#include "config.h"

#include "gettext.h"

#include "object-name.h"

#include "repository.h"

#include "commit.h"

#include "parse-options.h"

#include "gpg-interface.h"

static const char * const verify_commit_usage[] = {

    N_("git verify-commit [-v | --verbose] [--raw] <commit>..."),

    NULL

};

static int run_gpg_verify(struct commit *commit, unsigned flags)

{

  struct signature_check signature_check;

  int ret;

  memset(&signature_check, 0, sizeof(signature_check));

  ret = check_commit_signature(commit, &signature_check);

  print_signature_buffer(&signature_check, flags);

  signature_check_clear(&signature_check);

  return ret;

}

static int verify_commit(const char *name, unsigned flags)

{

  struct object_id oid;

  struct object *obj;

  if (repo_get_oid(the_repository, name, &oid))

    return error("commit '%s' not found.", name);

  obj = parse_object(the_repository, &oid);

  if (!obj)

    return error("%s: unable to read file.", name);

  if (obj->type != OBJ_COMMIT)

    return error("%s: cannot verify a non-commit object of type %s.",

        name, type_name(obj->type));

  return run_gpg_verify((struct commit *)obj, flags);

}

int cmd_verify_commit(int argc, const char **argv, const char *prefix)

{

  int i = 1, verbose = 0, had_error = 0;

  unsigned flags = 0;

  const struct option verify_commit_options[] = {

    OPT__VERBOSE(&verbose, N_("print commit contents")),

    OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),

    OPT_END()

  };

  git_config(git_default_config, NULL);

  argc = parse_options(argc, argv, prefix, verify_commit_options,

           verify_commit_usage, PARSE_OPT_KEEP_ARGV0);

  if (argc <= i)

    usage_with_options(verify_commit_usage, verify_commit_options);

  if (verbose)

    flags |= GPG_VERIFY_VERBOSE;

  /* sometimes the program was terminated because this signal

   * was received in the process of writing the gpg input: */

  signal(SIGPIPE, SIG_IGN);

  while (i < argc)

    if (verify_commit(argv[i++], flags))

      had_error = 1;

  return had_error;

}