/* cmd-ancestry-graph.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/bugs/exception.h"
#include "hackerlab/cmd/main.h"
#include "hackerlab/fs/file-names.h"
#include "hackerlab/fs/cwd.h"
#include "libfsutils/tmp-files.h"
#include "libfsutils/rmrf.h"
#include "libarch/namespace.h"
#include "libarch/project-tree.h"
#include "libarch/my.h"
#include "libarch/ancestry.h"
#include "commands/ancestry-graph.h"
#include "commands/version.h"



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

#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_dir, "d", "dir DIR", 1, \
      N_("cd to DIR first")) \
  OP (opt_merges, "m", "merges", 0, \
      N_("show merges into this development line")) \
  OP (opt_reverse, "r", "reverse", 0, \
      N_("list oldest to newest")) \
  OP (opt_immediate, "i", "immediate", 0, \
      N_("show only the immediate ancestor")) \
  OP (opt_previous, "p", "previous", 0, \
      N_("show the (namespace) previous revision"))


t_uchar arch_cmd_ancestry_graph_help[] = N_("display the ancestory of a revision\n"
                                          "Print a list describing the ancestry of a revision.\n");

enum options
{
  OPTS (OPT_ENUM)
};

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



int
arch_cmd_ancestry_graph (t_uchar * program_name, int argc, char * argv[])
{
  int o;
  struct opt_parsed * option;
  t_uchar * dir = 0;
  int merges = 0;
  int reverse = 0;
  int immediate = 0;
  int previous = 0;

  safe_buffer_fd (1, 0, O_WRONLY, 0);

  dir = str_save (0, ".");

  option = 0;

  while (1)
    {
      o = opt_standard (lim_use_must_malloc, &option, opts, &argc, argv, program_name, usage, libarch_version_string, arch_cmd_ancestry_graph_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_dir:
          {
            lim_free (0, dir);
            dir = str_save (0, option->arg_string);
            break;
          }

        case opt_merges:
          {
            immediate = 0;
            previous = 0;
            merges = 1;
            break;
          }

        case opt_immediate:
          {
            immediate = 1;
            previous = 0;
            merges = 0;
            break;
          }

        case opt_previous:
          {
            immediate = 0;
            previous = 1;
            merges = 0;
            break;
          }

        case opt_reverse:
          {
            reverse = 1;
            break;
          }
        }
    }

  if (argc > 2)
    goto usage_error;

  {
    t_uchar * revision_spec = 0;
    t_uchar * namespace = NULL;
    t_uchar * version = 0;
    t_uchar * revision = 0;
    struct arch_archive * arch = 0;
    arch_patch_id * patch_id;


    if (argc == 2)
      revision_spec = str_save (0, argv[1]);
    else
      {
	arch_project_tree_t * tree = arch_project_tree_new (talloc_context, dir);
	revision_spec = arch_try_tree_version_dir (program_name, tree);
	arch_project_tree_delete (tree);
      }

    arch = arch_archive_connect_branch (revision_spec, &namespace);
    if (!arch)
      {
	safe_printfmt (2, "could not connect to archive for %s\n", revision_spec);
      }
    
    if (!arch_valid_package_name (namespace, arch_maybe_archive, arch_req_package, 1))
      {
        safe_printfmt (2, "%s: invalid revision spec (%s)\n",
                       argv[0], namespace);
        exit (2);
      }

    revision_spec = str_replace (revision_spec, str_save (0, namespace));

    if (arch_valid_package_name (revision_spec, arch_maybe_archive, arch_req_package, 0))
      {
        t_uchar * package = 0;
        rel_table versions = 0;

        package = arch_parse_package_name (arch_ret_package, 0, revision_spec);
        versions = arch_archive_versions (arch, package);
        arch_sort_table_by_name_field (1, versions, 0);
        if (!versions)
          {
            safe_printfmt (2, "%s: package has no versions (%s)\n",
                           argv[0], revision_spec);
            exit (1);
          }

        lim_free (0, revision_spec);
        revision_spec = str_save (0, versions[0][0]);

        lim_free (0, package);
        rel_free_table (versions);
      }


    if (arch_valid_package_name (revision_spec, arch_maybe_archive, arch_req_version, 0))
      {
        rel_table revisions = 0;

        version = arch_parse_package_name (arch_ret_package_version, 0, revision_spec);

        revisions = arch_archive_revisions (arch, version, 1);
        arch_sort_table_by_name_field (1, revisions, 0);
        if (!revisions)
          {
            safe_printfmt (2, "%s: no revisions in version (%s/%s)\n",
                           argv[0], arch->official_name, revision_spec);
            exit (2);
          }

        revision = arch_parse_package_name (arch_ret_non_archive, 0, revisions[0][0]);

        rel_free_table (revisions);
      }
    else
      {
        version = arch_parse_package_name (arch_ret_package_version, 0, revision_spec);
        revision = arch_parse_package_name (arch_ret_non_archive, 0, revision_spec);
      }
    
    patch_id = arch_patch_id_new_archive (arch->official_name, revision);

    if (immediate)
      {
        t_uchar * ancestor = 0;

        ancestor = arch_ancestor_revision (arch, revision);
        safe_printfmt (1, "%s\n", ancestor);

        lim_free (0, ancestor);
      }
    else if (previous)
      {
        arch_patch_id * previous = arch_previous_revision (arch, patch_id);
	if (previous)
	    safe_printfmt (1, "%s\n", arch_patch_id_patch_id (previous));
	else
	    safe_printfmt (1, "(null)\n");

        talloc_free (previous);
      }
    else
      {
        rel_table ancestry = 0;

        ancestry = arch_trace_ancestry (NULL, arch, patch_id, merges);

        if (reverse)
          rel_reverse_table (ancestry);

        rel_print_table (1, ancestry);

        rel_free_table (ancestry);
      }


    arch_archive_close (arch);
    lim_free (0, revision_spec);
    lim_free (0, namespace);
    lim_free (0, version);
    lim_free (0, revision);
    talloc_free (patch_id);
  }

  return 0;
}




/* tag: Tom Lord Thu Jun 26 20:20:27 2003 (cmd-ancestry.c)
 */