/* cmd-get-changeset.c
 *
 ****************************************************************
 * Copyright (C) 2003 Tom Lord
 *
 * See the file "COPYING" for further information about
 * the copyright and warranty status of this work.
 */


#include "config-options.h"
#include "po/gettext.h"
#include "hackerlab/cmd/main.h"
#include "libarch/namespace.h"
#include "libarch/project-tree.h"
#include "libarch/my.h"
#include "libarch/archive.h"
#include "commands/cmd.h"
#include "commands/cmdutils.h"
#include "commands/get-changeset.h"
#include "commands/version.h"



static t_uchar * usage = N_("[options] revision [dir]");

#define OPTS(OP) \
  OP (opt_help_msg, "h", "help", 0, \
      N_("Display a help message and exit.")) \
  OP (opt_long_help, "H", 0, 0, \
      N_("Display a verbose help message and exit.")) \
  OP (opt_version, "V", "version", 0, \
      N_("Display a release identifier string\n" \
      "and exit.")) \
  OP (opt_archive, "A", "archive", 1, \
      N_("Override `my-default-archive'"))


t_uchar arch_cmd_get_changeset_help[] = N_("retrieve a changeset from an archive\n"
					 "Retrieve the changeset for REVISION and store it in the directory DIR\n"
					 "(or a directory named REVISION.patches).  DIR must not already exist.\n");

enum options
{
  OPTS (OPT_ENUM)
};

static struct opt_desc opts[] =
{
  OPTS (OPT_DESC)
    {-1, 0, 0, 0, 0}
};



int
arch_cmd_get_changeset (t_uchar * program_name, int argc, char * argv[])
{
  int o;
  struct opt_parsed * option;
  t_uchar * default_archive;


  default_archive = 0;

  safe_buffer_fd (1, 0, O_WRONLY, 0);

  option = 0;

  while (1)
    {
      o = opt_standard (lim_use_must_malloc, &option, opts, &argc, argv, program_name, usage, libarch_version_string, arch_cmd_get_changeset_help, opt_help_msg, opt_long_help, opt_version);
      if (o == opt_none)
        break;
      switch (o)
        {
        default:
          safe_printfmt (2, "unhandled option `%s'\n", option->opt_string);
          panic ("internal error parsing arguments");

        usage_error:
          opt_usage (2, argv[0], program_name, usage, 1);
          exit (1);

          /* bogus_arg: */
          safe_printfmt (2, "ill-formed argument for `%s' (`%s')\n", option->opt_string, option->arg_string);
          goto usage_error;

        case opt_archive:
          {
            default_archive = str_save (0, option->arg_string);
            break;
          }
        }
    }

  if ((argc < 2) || (argc > 3))
    goto usage_error;

  default_archive = arch_my_default_archive (default_archive);

  {
    t_uchar * revision = NULL;
    t_uchar * output_dir = NULL;
    struct arch_archive * arch = NULL;
    arch_patch_id * revision_patch;

    revision = arch_determine_revision(&arch, default_archive, argv[1], argv[0]);
    revision_patch = arch_patch_id_new_archive (arch->official_name, revision);
    if (argc == 3)
      output_dir = argv[2];
    else
      output_dir = str_alloc_cat (0, revision, ".patches");

    arch_check_for (arch, arch_req_patch_level, revision);

    arch_get_patch (arch, revision_patch, output_dir);
    talloc_free (arch);
    talloc_free (revision_patch);
  }

  return 0;
}




/* tag: Tom Lord Tue May 20 17:32:40 2003 (get-patch.c)
 */