path: root/lib/libalpm/trans.c

/*
 *  trans.c
 *
 *  Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
 *  Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
 *  Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
 *  Copyright (c) 2005, 2006 by Miklos Vajna <vmiklos@frugalware.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 "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <libintl.h>
/* pacman */
#include "error.h"
#include "package.h"
#include "util.h"
#include "log.h"
#include "alpm_list.h"
#include "handle.h"
#include "add.h"
#include "remove.h"
#include "sync.h"
#include "alpm.h"

pmtrans_t *_alpm_trans_new()
{
  pmtrans_t *trans;

  if((trans = (pmtrans_t *)malloc(sizeof(pmtrans_t))) == NULL) {
    _alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"), sizeof(pmtrans_t));
    return(NULL);
  }

  trans->targets = NULL;
  trans->packages = NULL;
  trans->skiplist = NULL;
  trans->type = 0;
  trans->flags = 0;
  trans->cb_event = NULL;
  trans->cb_conv = NULL;
  trans->cb_progress = NULL;
  trans->state = STATE_IDLE;

  return(trans);
}

void _alpm_trans_free(void *data)
{
  pmtrans_t *trans = data;

  if(trans == NULL) {
    return;
  }

  FREELIST(trans->targets);
  if(trans->type == PM_TRANS_TYPE_SYNC) {
    alpm_list_t *i;
    for(i = trans->packages; i; i = i->next) {
      FREESYNC(i->data);
    }
    FREELIST(trans->packages);
  } else {
    FREELISTPKGS(trans->packages);
  }

  FREELIST(trans->skiplist);

  FREE(trans);
}

int _alpm_trans_init(pmtrans_t *trans, pmtranstype_t type, unsigned int flags,
                     alpm_trans_cb_event event, alpm_trans_cb_conv conv,
                     alpm_trans_cb_progress progress)
{
  /* Sanity checks */
  ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));

  trans->type = type;
  trans->flags = flags;
  trans->cb_event = event;
  trans->cb_conv = conv;
  trans->cb_progress = progress;
  trans->state = STATE_INITIALIZED;

  return(0);
}

int _alpm_trans_sysupgrade(pmtrans_t *trans)
{
  /* Sanity checks */
  ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));

  return(_alpm_sync_sysupgrade(trans, handle->db_local, handle->dbs_sync));
}

int _alpm_trans_addtarget(pmtrans_t *trans, char *target)
{
  /* Sanity checks */
  ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
  ASSERT(target != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));

  if(alpm_list_is_strin(target, trans->targets)) {
    RET_ERR(PM_ERR_TRANS_DUP_TARGET, -1);
  }

  switch(trans->type) {
    case PM_TRANS_TYPE_ADD:
    case PM_TRANS_TYPE_UPGRADE:
      if(_alpm_add_loadtarget(trans, handle->db_local, target) == -1) {
        /* pm_errno is set by _alpm_add_loadtarget() */
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_REMOVE:
      if(_alpm_remove_loadtarget(trans, handle->db_local, target) == -1) {
        /* pm_errno is set by remove_loadtarget() */
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_SYNC:
      if(_alpm_sync_addtarget(trans, handle->db_local, handle->dbs_sync, target) == -1) {
        /* pm_errno is set by sync_loadtarget() */
        return(-1);
      }
    break;
  }

  trans->targets = alpm_list_add(trans->targets, strdup(target));

  return(0);
}

int _alpm_trans_prepare(pmtrans_t *trans, alpm_list_t **data)
{
  *data = NULL;

  /* Sanity checks */
  ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));

  /* If there's nothing to do, return without complaining */
  if(trans->packages == NULL) {
    return(0);
  }

  switch(trans->type) {
    case PM_TRANS_TYPE_ADD:
    case PM_TRANS_TYPE_UPGRADE:
      if(_alpm_add_prepare(trans, handle->db_local, data) == -1) {
        /* pm_errno is set by _alpm_add_prepare() */
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_REMOVE:
      if(_alpm_remove_prepare(trans, handle->db_local, data) == -1) {
        /* pm_errno is set by _alpm_remove_prepare() */
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_SYNC:
      if(_alpm_sync_prepare(trans, handle->db_local, handle->dbs_sync, data) == -1) {
        /* pm_errno is set by _alpm_sync_prepare() */
        return(-1);
      }
    break;
  }

  trans->state = STATE_PREPARED;

  return(0);
}

int _alpm_trans_commit(pmtrans_t *trans, alpm_list_t **data)
{
  if(data!=NULL)
    *data = NULL;

  /* Sanity checks */
  ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));

  /* If there's nothing to do, return without complaining */
  if(trans->packages == NULL) {
    return(0);
  }

  trans->state = STATE_COMMITING;

  switch(trans->type) {
    case PM_TRANS_TYPE_ADD:
    case PM_TRANS_TYPE_UPGRADE:
      if(_alpm_add_commit(trans, handle->db_local) == -1) {
        /* pm_errno is set by _alpm_add_prepare() */
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_REMOVE:
      if(_alpm_remove_commit(trans, handle->db_local) == -1) {
        /* pm_errno is set by _alpm_remove_prepare() */
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_SYNC:
      if(_alpm_sync_commit(trans, handle->db_local, data) == -1) {
        /* pm_errno is set by _alpm_sync_commit() */
        return(-1);
      }
    break;
  }

  trans->state = STATE_COMMITED;

  return(0);
}

pmtranstype_t alpm_trans_get_type()
{
  /* Sanity checks */
  ASSERT(handle != NULL, return(-1));
  ASSERT(handle->trans != NULL, return(-1));

  return handle->trans->type;
}

unsigned int alpm_trans_get_flags()
{
  /* Sanity checks */
  ASSERT(handle != NULL, return(-1));
  ASSERT(handle->trans != NULL, return(-1));

  return handle->trans->flags;
}

alpm_list_t * alpm_trans_get_targets()
{
  /* Sanity checks */
  ASSERT(handle != NULL, return(NULL));
  ASSERT(handle->trans != NULL, return(NULL));

  return handle->trans->targets;
}

alpm_list_t * alpm_trans_get_packages()
{
  /* Sanity checks */
  ASSERT(handle != NULL, return(NULL));
  ASSERT(handle->trans != NULL, return(NULL));

  return handle->trans->packages;
}
/* vim: set ts=2 sw=2 noet: */