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

extern config_t *config;

extern PM_DB *db_local;

int pacman_remove(list_t *targets)
{
  PM_LIST *data;
  list_t *i;
  list_t *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 = i->next) {
    PM_GRP *grp;

    grp = alpm_db_readgrp(db_local, i->data);
    if(grp) {
      PM_LIST *lp, *pkgnames;
      int all;

      pkgnames = alpm_grp_getinfo(grp, PM_GRP_PKGNAMES);

      MSG(NL, ":: group %s:\n", alpm_grp_getinfo(grp, PM_GRP_NAME));
      PM_LIST_display("   ", pkgnames);
      all = yesno("    Remove whole content? [Y/n] ");
      for(lp = alpm_list_first(pkgnames); lp; lp = alpm_list_next(lp)) {
        if(all || yesno(":: Remove %s from group %s? [Y/n] ", (char *)alpm_list_getdata(lp), i->data)) {
          finaltargs = list_add(finaltargs, strdup(alpm_list_getdata(lp)));
        }
      }
    } else {
      /* not a group, so add it to the final targets */
      finaltargs = list_add(finaltargs, strdup(i->data));
    }
  }

  /* Step 1: create a new transaction
   */
  if(alpm_trans_init(PM_TRANS_TYPE_REMOVE, config->flags, cb_trans_evt, cb_trans_conv) == -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\n", PM_LOCK);
    }
    FREELIST(finaltargs);
    return(1);
  }
  /* and add targets to it */
  for(i = finaltargs; i; i = i->next) {
    if(alpm_trans_addtarget(i->data) == -1) {
      ERR(NL, "failed to add target '%s' (%s)\n", (char *)i->data, 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) {
    PM_LIST *lp;
    ERR(NL, "failed to prepare transaction (%s)\n", alpm_strerror(pm_errno));
    switch(pm_errno) {
      case PM_ERR_UNSATISFIED_DEPS:
        for(lp = alpm_list_first(data); lp; lp = alpm_list_next(lp)) {
          PM_DEPMISS *miss = alpm_list_getdata(lp);
          MSG(NL, "  %s: is required by %s\n", alpm_dep_getinfo(miss, PM_DEP_TARGET),
              alpm_dep_getinfo(miss, PM_DEP_NAME));
        }
        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) {
    PM_LIST *lp;
    /* list transaction targets */
    i = NULL;
    for(lp = alpm_list_first(alpm_trans_getinfo(PM_TRANS_PACKAGES)); lp; lp = alpm_list_next(lp)) {
      PM_PKG *pkg = alpm_list_getdata(lp);
      i = list_add(i, strdup(alpm_pkg_getinfo(pkg, PM_PKG_NAME)));
    }
    list_display("\nTargets:", i);
    FREELIST(i);
    /* 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));
  }

  return(retval);
}

/* vim: set ts=2 sw=2 noet: */