src/pacman/upgrade.c


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/*
 *  upgrade.c
 *
 *  Copyright (c) 2002-2007 by Judd Vinet <jvinet@zeroflux.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <alpm.h>
#include <alpm_list.h>

/* pacman */
#include "pacman.h"
#include "conf.h"
#include "util.h"

/**
 * @brief Upgrade a specified list of packages.
 *
 * @param targets a list of packages (as strings) to upgrade
 *
 * @return 0 on success, 1 on failure
 */
int pacman_upgrade(alpm_list_t *targets)
{
  alpm_list_t *i, *data = NULL;
  pmtranstype_t transtype = PM_TRANS_TYPE_UPGRADE;
  int retval = 0;

  if(targets == NULL) {
    pm_printf(PM_LOG_ERROR, _("no targets specified (use -h for help)\n"));
    return(1);
  }

  /* Check for URL targets and process them
   */
  for(i = targets; i; i = alpm_list_next(i)) {
    if(strstr(i->data, "://")) {
      char *str = alpm_fetch_pkgurl(i->data);
      if(str == NULL) {
        return(1);
      } else {
        free(i->data);
        i->data = str;
      }
    }
  }

  /* Step 1: create a new transaction */
  if(trans_init(transtype, config->flags) == -1) {
    return(1);
  }

  /* add targets to the created transaction */
  printf(_("loading package data...\n"));
  for(i = targets; i; i = alpm_list_next(i)) {
    char *targ = alpm_list_getdata(i);
    if(alpm_trans_addtarget(targ) == -1) {
      pm_fprintf(stderr, PM_LOG_ERROR, "'%s': %s\n",
          targ, alpm_strerrorlast());
      trans_release();
      return(1);
    }
  }

  /* Step 2: "compute" the transaction based on targets and flags */
  /* TODO: No, compute nothing. This is stupid. */
  if(alpm_trans_prepare(&data) == -1) {
    pm_fprintf(stderr, PM_LOG_ERROR, _("failed to prepare transaction (%s)\n"),
            alpm_strerrorlast());
    switch(pm_errno) {
      case PM_ERR_UNSATISFIED_DEPS:
        for(i = data; i; i = alpm_list_next(i)) {
          pmdepmissing_t *miss = alpm_list_getdata(i);
          pmdepend_t *dep = alpm_miss_get_dep(miss);
          char *depstring = alpm_dep_compute_string(dep);

          /* TODO indicate if the error was a virtual package or not:
           *    :: %s: requires %s, provided by %s
           */
          printf(_(":: %s: requires %s\n"), alpm_miss_get_target(miss),
              depstring);
          free(depstring);
        }
        break;
      case PM_ERR_CONFLICTING_DEPS:
        for(i = data; i; i = alpm_list_next(i)) {
          pmconflict_t *conflict = alpm_list_getdata(i);
          printf(_(":: %s: conflicts with %s\n"),
            alpm_conflict_get_package1(conflict), alpm_conflict_get_package2(conflict));
        }
        break;
      case PM_ERR_FILE_CONFLICTS:
        for(i = data; i; i = alpm_list_next(i)) {
          pmfileconflict_t *conflict = alpm_list_getdata(i);
          switch(alpm_fileconflict_get_type(conflict)) {
            case PM_FILECONFLICT_TARGET:
              printf(_("%s exists in both '%s' and '%s'\n"),
                      alpm_fileconflict_get_file(conflict),
                      alpm_fileconflict_get_target(conflict),
                      alpm_fileconflict_get_ctarget(conflict));
            break;
            case PM_FILECONFLICT_FILESYSTEM:
              printf(_("%s: %s exists in filesystem\n"),
                      alpm_fileconflict_get_target(conflict),
                      alpm_fileconflict_get_file(conflict));
            break;
          }
        }
        printf(_("\nerrors occurred, no packages were upgraded.\n"));
        break;
      default:
        break;
    }
    trans_release();
    FREELIST(data);
    return(1);
  }
  alpm_list_free(data);

  /* Step 3: perform the installation */
  if(alpm_trans_commit(NULL) == -1) {
    pm_fprintf(stderr, PM_LOG_ERROR, _("failed to commit transaction (%s)\n"),
      alpm_strerrorlast());
    trans_release();
    return(1);
  }

  if(trans_release() == -1) {
    retval = 1;
  }
  return(retval);
}

/* vim: set ts=2 sw=2 noet: */