src/pacman/remove.c


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/*
 *  remove.c
 * 
 *  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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 
 *  USA.
 */

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

#include <alpm.h>
#include <alpm_list.h>
/* pacman */
#include "util.h"
#include "log.h"
#include "trans.h"
#include "remove.h"
#include "conf.h"

extern config_t *config;

extern pmdb_t *db_local;

int pacman_remove(alpm_list_t *targets)
{
  alpm_list_t *data = NULL, *i, *j, *finaltargs = NULL;
  int retval = 0;

  if(targets == NULL) {
    return(0);
  }

  /* If the target is a group, ask if its packages should be removed 
   * (the library can't remove groups for now)
   */
  for(i = targets; i; i = alpm_list_next(i)) {
    pmgrp_t *grp = alpm_db_readgrp(db_local, alpm_list_getdata(i));
    if(grp) {
      int all;
      alpm_list_t *pkgnames = alpm_grp_get_packages(grp);

      MSG(NL, _(":: group %s:\n"), alpm_grp_get_name(grp));
      list_display("   ", pkgnames);
      all = yesno(_("    Remove whole content? [Y/n] "));

      for(j = pkgnames; j; j = alpm_list_next(j)) {
        char *pkg = alpm_list_getdata(j);
        if(all || yesno(_(":: Remove %s from group %s? [Y/n] "), pkg, (char *)alpm_list_getdata(i))) {
          finaltargs = alpm_list_add(finaltargs, strdup(pkg));
        }
      }
    } else {
      /* not a group, so add it to the final targets */
      finaltargs = alpm_list_add(finaltargs, strdup(alpm_list_getdata(i)));
    }
  }

  /* Step 1: create a new transaction
   */
  if(alpm_trans_init(PM_TRANS_TYPE_REMOVE, config->flags, cb_trans_evt, cb_trans_conv, cb_trans_progress) == -1) {
    ERR(NL, _("failed to init transaction (%s)\n"), alpm_strerror(pm_errno));
    if(pm_errno == PM_ERR_HANDLE_LOCK) {
      MSG(NL, _("       if you're sure a package manager is not already running,\n"
              "       you can remove %s%s\n"), alpm_option_get_root(), PM_LOCK);
    }
    FREELIST(finaltargs);
    return(1);
  }
  /* and add targets to it */
  for(i = finaltargs; i; i = alpm_list_next(i)) {
    char *targ = alpm_list_getdata(i);
    if(alpm_trans_addtarget(targ) == -1) {
      ERR(NL, _("failed to add target '%s' (%s)\n"), targ, alpm_strerror(pm_errno));
      retval = 1;
      goto cleanup;
    }
  }

  /* Step 2: prepare the transaction based on its type, targets and flags
   */
  if(alpm_trans_prepare(&data) == -1) {
    ERR(NL, _("failed to prepare transaction (%s)\n"), alpm_strerror(pm_errno));
    switch(pm_errno) {
      case PM_ERR_UNSATISFIED_DEPS:
        for(i = data; i; i = alpm_list_next(i)) {
          pmdepmissing_t *miss = alpm_list_getdata(i);
          MSG(NL, _(":: %s is required by %s\n"), alpm_dep_get_target(miss),
              alpm_dep_get_name(miss));
        }
        alpm_list_free(data);
      break;
      default:
      break;
    }
    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 *lst = NULL;
    for(i = alpm_trans_get_packages(); i; i = alpm_list_next(i)) {
      pmpkg_t *pkg = alpm_list_getdata(i);
      lst = alpm_list_add(lst, strdup(alpm_pkg_get_name(pkg)));
    }
    MSG(NL, "\n");
    list_display(_("Targets:"), lst);
    FREELIST(lst);
    /* get confirmation */
    if(yesno(_("\nDo you want to remove these packages? [Y/n] ")) == 0) {
      retval = 1;
      goto cleanup;
    }
    MSG(NL, "\n");
  }

  /* Step 3: actually perform the removal
   */
  if(alpm_trans_commit(NULL) == -1) {
    ERR(NL, _("failed to commit transaction (%s)\n"), alpm_strerror(pm_errno));
    retval = 1;
    goto cleanup;
  }

  /* Step 4: release transaction resources
   */
cleanup:
  FREELIST(finaltargs);
  if(alpm_trans_release() == -1) {
    ERR(NL, _("failed to release transaction (%s)\n"), alpm_strerror(pm_errno));
    retval = 1;
  }

  return(retval);
}

/* vim: set ts=2 sw=2 noet: */