add.c

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/*
 *  add.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 "callback.h"
#include "conf.h"
#include "util.h"

/* Free the current transaction and print an error if unsuccessful */
static int add_cleanup(void)
{
    int ret = alpm_trans_release();
    if(ret != 0) {
        pm_printf(PM_LOG_ERROR, _("failed to release transaction (%s)\n"),
                alpm_strerrorlast());
        ret = 1;
    }

    return(ret);
}

/**
 * @brief Upgrade a specified list of packages.
 *
 * @param targets a list of packages (as strings) to upgrade
 *
 * @return 0 on success, 1 on failure
 */
int pacman_upgrade(alpm_list_t *targets)
{
    /* this is basically just a remove-then-add process. pacman_add() will */
    /* handle it */
    config->upgrade = 1;
    return(pacman_add(targets));
}

/**
 * @brief Add a specified list of packages which cannot already be installed.
 *
 * @param targets a list of packages (as strings) to add
 *
 * @return 0 on success, 1 on failure
 */
int pacman_add(alpm_list_t *targets)
{
    alpm_list_t *i, *data = NULL;
    pmtranstype_t transtype = PM_TRANS_TYPE_ADD;
    int retval = 0;

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

    /* Check for URL targets and process them
     */
    for(i = targets; i; i = alpm_list_next(i)) {
        if(strstr(i->data, "://")) {
            char *str = alpm_fetch_pkgurl(i->data);
            if(str == NULL) {
                return(1);
            } else {
                free(i->data);
                i->data = str;
            }
        }
    }

    /* Step 1: create a new transaction */
    if(config->upgrade == 1) {
        /* if upgrade flag was set, change this to an upgrade transaction */
        transtype = PM_TRANS_TYPE_UPGRADE;
    }

    if(alpm_trans_init(transtype, config->flags, cb_trans_evt,
       cb_trans_conv, cb_trans_progress) == -1) {
        /* TODO: error messages should be in the front end, not the back */
        fprintf(stderr, _("error: %s\n"), alpm_strerrorlast());
        if(pm_errno == PM_ERR_HANDLE_LOCK) {
            /* TODO this and the 2 other places should probably be on stderr */
            printf(_("  if you're sure a package manager is not already\n"
                     "  running, you can remove %s.\n"), alpm_option_get_lockfile());
        }
        return(1);
    }

    /* add targets to the created transaction */
    printf(_("loading package data... "));
    for(i = targets; i; i = alpm_list_next(i)) {
        char *targ = alpm_list_getdata(i);
        if(alpm_trans_addtarget(targ) == -1) {
            fprintf(stderr, _("error: failed to add target '%s' (%s)"), targ,
                    alpm_strerrorlast());
            add_cleanup();
            return(1);
        }
    }
    printf(_("done.\n"));

    /* Step 2: "compute" the transaction based on targets and flags */
    /* TODO: No, compute nothing. This is stupid. */
    if(alpm_trans_prepare(&data) == -1) {
        fprintf(stderr, _("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_get_string(dep);

                    /* TODO indicate if the error was a virtual package or not:
                     *      :: %s: requires %s, provided by %s
                     */
                    printf(_(":: %s: requires %s\n"), alpm_miss_get_target(miss),
                            depstring);
                    free(depstring);
                }
                break;
            case PM_ERR_CONFLICTING_DEPS:
                for(i = data; i; i = alpm_list_next(i)) {
                    pmconflict_t *conflict = alpm_list_getdata(i);
                    printf(_(":: %s: conflicts with %s"),
                        alpm_conflict_get_package1(conflict), alpm_conflict_get_package2(conflict));
                }
                break;
            case PM_ERR_FILE_CONFLICTS:
                for(i = data; i; i = alpm_list_next(i)) {
                    pmfileconflict_t *conflict = alpm_list_getdata(i);
                    switch(alpm_fileconflict_get_type(conflict)) {
                        case PM_FILECONFLICT_TARGET:
                            printf(_("%s exists in both '%s' and '%s'\n"),
                                    alpm_fileconflict_get_file(conflict),
                                    alpm_fileconflict_get_target(conflict),
                                    alpm_fileconflict_get_ctarget(conflict));
                        break;
                        case PM_FILECONFLICT_FILESYSTEM:
                            printf(_("%s: %s exists in filesystem\n"),
                                    alpm_fileconflict_get_target(conflict),
                                    alpm_fileconflict_get_file(conflict));
                        break;
                    }
                }
                printf(_("\nerrors occurred, no packages were upgraded.\n"));
                break;
            default:
                break;
        }
        add_cleanup();
        FREELIST(data);
        return(1);
    }
    alpm_list_free(data);

    /* Step 3: perform the installation */
    if(alpm_trans_commit(NULL) == -1) {
        fprintf(stderr, _("error: failed to commit transaction (%s)\n"), alpm_strerrorlast());
        add_cleanup();
        return(1);
    }

    retval = add_cleanup();
    return(retval);
}

/* vim: set ts=2 sw=2 noet: */

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