src/pacman/remove.c


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

extern pmdb_t *db_local;

/**
 * @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(PM_LOG_ERROR, _("no targets specified (use -h for help)\n"));
    return(1);
  }

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

  /* Step 1: add targets to the created transaction */
  for(i = targets; i; i = alpm_list_next(i)) {
    char *targ = alpm_list_getdata(i);
    if(alpm_trans_addtarget(targ) == -1) {
      if(pm_errno == PM_ERR_PKG_NOT_FOUND) {
        printf(_("%s not found, searching for group...\n"), targ);
        pmgrp_t *grp = alpm_db_readgrp(db_local, targ);
        if(grp == NULL) {
          pm_fprintf(stderr, PM_LOG_ERROR, _("'%s': not found in local db\n"), targ);
          retval = 1;
          goto cleanup;
        } else {
          alpm_list_t *p, *pkgnames = NULL;
          /* convert packages to package names */
          for(p = alpm_grp_get_pkgs(grp); p; p = alpm_list_next(p)) {
            pmpkg_t *pkg = alpm_list_getdata(p);
            pkgnames = alpm_list_add(pkgnames, (void *)alpm_pkg_get_name(pkg));
          }
          printf(_(":: group %s:\n"), targ);
          list_display("   ", pkgnames);
          int all = yesno(_("    Remove whole content?"));
          for(p = pkgnames; p; p = alpm_list_next(p)) {
            char *pkgn = alpm_list_getdata(p);
            if(all || yesno(_(":: Remove %s from group %s?"), pkgn, targ)) {
              if(alpm_trans_addtarget(pkgn) == -1) {
                pm_fprintf(stderr, PM_LOG_ERROR, "'%s': %s\n", targ,
                           alpm_strerrorlast());
                retval = 1;
                alpm_list_free(pkgnames);
                goto cleanup;
              }
            }
          }
          alpm_list_free(pkgnames);
        }
      } else {
        pm_fprintf(stderr, PM_LOG_ERROR, "'%s': %s\n", targ, alpm_strerrorlast());
        retval = 1;
        goto cleanup;
      }
    }
  }

  /* Step 2: prepare the transaction based on its type, targets and flags */
  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);
          printf(_(":: %s: requires %s\n"), alpm_miss_get_target(miss),
              depstring);
          free(depstring);
        }
        FREELIST(data);
        break;
      default:
        break;
    }
    retval = 1;
    goto cleanup;
  }

  /* Search for holdpkg in target list */
  int holdpkg = 0;
  for(i = alpm_trans_get_pkgs(); i; i = alpm_list_next(i)) {
    pmpkg_t *pkg = alpm_list_getdata(i);
    if(alpm_list_find_str(config->holdpkg, alpm_pkg_get_name(pkg))) {
      pm_printf(PM_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;
  }

  /* Warn user in case of dangerous operation */
  if(config->flags & PM_TRANS_FLAG_RECURSE ||
     config->flags & PM_TRANS_FLAG_CASCADE) {
    /* list transaction targets */
    alpm_list_t *pkglist = alpm_trans_get_pkgs();

    display_targets(pkglist, 0);
    printf("\n");

    /* get confirmation */
    if(yesno(_("Do you want to remove these packages?")) == 0) {
      retval = 1;
      goto cleanup;
    }
  }

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

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

/* vim: set ts=2 sw=2 noet: */