src/pacman/remove.c


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/*
 *  remove.c
 *
 *  Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
 *  Copyright (c) 2002-2006 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 <alpm.h>
#include <alpm_list.h>

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

static int remove_target(const char *target)
{
  alpm_pkg_t *pkg;
  alpm_db_t *db_local = alpm_option_get_localdb(config->handle);
  alpm_list_t *p;

  if((pkg = alpm_db_get_pkg(db_local, target)) != NULL) {
    if(alpm_remove_pkg(config->handle, pkg) == -1) {
      pm_fprintf(stderr, ALPM_LOG_ERROR, "'%s': %s\n", target,
          alpm_strerror(alpm_errno(config->handle)));
      return -1;
    }
    config->explicit_removes = alpm_list_add(config->explicit_removes, pkg);
    return 0;
  }

    /* fallback to group */
  alpm_group_t *grp = alpm_db_readgroup(db_local, target);
  if(grp == NULL) {
    pm_fprintf(stderr, ALPM_LOG_ERROR, "'%s': target not found\n", target);
    return -1;
  }
  for(p = grp->packages; p; p = alpm_list_next(p)) {
    pkg = p->data;
    if(alpm_remove_pkg(config->handle, pkg) == -1) {
      pm_fprintf(stderr, ALPM_LOG_ERROR, "'%s': %s\n", target,
          alpm_strerror(alpm_errno(config->handle)));
      return -1;
    }
    config->explicit_removes = alpm_list_add(config->explicit_removes, pkg);
  }
  return 0;
}

/**
 * @brief Remove a specified list of packages.
 *
 * @param targets a list of packages (as strings) to remove from the system
 *
 * @return 0 on success, 1 on failure
 */
int pacman_remove(alpm_list_t *targets)
{
  int retval = 0;
  alpm_list_t *i, *data = NULL;

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

  /* Step 0: create a new transaction */
  if(trans_init(config->flags, 0) == -1) {
    return 1;
  }

  /* Step 1: add targets to the created transaction */
  for(i = targets; i; i = alpm_list_next(i)) {
    char *target = i->data;
    char *targ = strchr(target, '/');
    if(targ && strncmp(target, "local", 5) == 0) {
      targ++;
    } else {
      targ = target;
    }
    if(remove_target(targ) == -1) {
      retval = 1;
      goto cleanup;
    }
  }

  /* Step 2: prepare the transaction based on its type, targets and flags */
  if(alpm_trans_prepare(config->handle, &data) == -1) {
    enum _alpm_errno_t err = alpm_errno(config->handle);
    pm_fprintf(stderr, ALPM_LOG_ERROR, _("failed to prepare transaction (%s)\n"),
            alpm_strerror(err));
    switch(err) {
      case ALPM_ERR_PKG_INVALID_ARCH:
        for(i = data; i; i = alpm_list_next(i)) {
          const char *pkg = i->data;
          printf(_(":: package %s does not have a valid architecture\n"), pkg);
        }
        break;
      case ALPM_ERR_UNSATISFIED_DEPS:
        for(i = data; i; i = alpm_list_next(i)) {
          alpm_depmissing_t *miss = i->data;
          char *depstring = alpm_dep_compute_string(miss->depend);
          printf(_(":: %s: requires %s\n"), miss->target, depstring);
          free(depstring);
        }
        break;
      default:
        break;
    }
    FREELIST(data);
    retval = 1;
    goto cleanup;
  }

  /* Search for holdpkg in target list */
  int holdpkg = 0;
  for(i = alpm_trans_get_remove(config->handle); i; i = alpm_list_next(i)) {
    alpm_pkg_t *pkg = i->data;
    if(alpm_list_find_str(config->holdpkg, alpm_pkg_get_name(pkg))) {
      pm_printf(ALPM_LOG_WARNING, _("%s is designated as a HoldPkg.\n"),
              alpm_pkg_get_name(pkg));
      holdpkg = 1;
    }
  }
  if(holdpkg && (noyes(_("HoldPkg was found in target list. Do you want to continue?")) == 0)) {
    retval = 1;
    goto cleanup;
  }

  /* Step 3: actually perform the removal */
  alpm_list_t *pkglist = alpm_trans_get_remove(config->handle);
  if(pkglist == NULL) {
    printf(_(" there is nothing to do\n"));
    goto cleanup; /* we are done */
  }

  if(config->print) {
    print_packages(pkglist);
    goto cleanup;
  }

  /* print targets and ask user confirmation */
  display_targets();
  printf("\n");
  if(yesno(_("Do you want to remove these packages?")) == 0) {
    retval = 1;
    goto cleanup;
  }

  if(alpm_trans_commit(config->handle, &data) == -1) {
    pm_fprintf(stderr, ALPM_LOG_ERROR, _("failed to commit transaction (%s)\n"),
            alpm_strerror(alpm_errno(config->handle)));
    retval = 1;
  }

  FREELIST(data);

  /* Step 4: release transaction resources */
cleanup:
  if(trans_release() == -1) {
    retval = 1;
  }
  return retval;
}

/* vim: set ts=2 sw=2 noet: */