path: root/src/pacman/remove.c

/*
 *  remove.c
 *
 *  Copyright (c) 2006-2017 Pacman Development Team <pacman-dev@archlinux.org>
 *  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, see <http://www.gnu.org/licenses/>.
 */

#include <fnmatch.h>
#include <stdlib.h>
#include <stdio.h>

#include <alpm.h>
#include <alpm_list.h>

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

static int fnmatch_cmp(const void *pattern, const void *string)
{
        return fnmatch(pattern, string, 0);
}

static int remove_target(const char *target)
{
        alpm_pkg_t *pkg;
        alpm_db_t *db_local = alpm_get_localdb(config->handle);
        alpm_list_t *p;

        if((pkg = alpm_db_get_pkg(db_local, target)) != NULL) {
                if(alpm_remove_pkg(config->handle, pkg) == -1) {
                        alpm_errno_t err = alpm_errno(config->handle);
                        if(err == ALPM_ERR_TRANS_DUP_TARGET) {
                                /* just skip duplicate targets */
                                pm_printf(ALPM_LOG_WARNING, _("skipping target: %s\n"), target);
                                return 0;
                        } else {
                                pm_printf(ALPM_LOG_ERROR, "'%s': %s\n", target, alpm_strerror(err));
                                return -1;
                        }
                }
                config->explicit_removes = alpm_list_add(config->explicit_removes, pkg);
                return 0;
        }

                /* fallback to group */
        alpm_group_t *grp = alpm_db_get_group(db_local, target);
        if(grp == NULL) {
                pm_printf(ALPM_LOG_ERROR, _("target not found: %s\n"), target);
                return -1;
        }
        for(p = grp->packages; p; p = alpm_list_next(p)) {
                pkg = p->data;
                if(alpm_remove_pkg(config->handle, pkg) == -1) {
                        pm_printf(ALPM_LOG_ERROR, "'%s': %s\n", target,
                                        alpm_strerror(alpm_errno(config->handle)));
                        return -1;
                }
                config->explicit_removes = alpm_list_add(config->explicit_removes, pkg);
        }
        return 0;
}

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

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

        /* Step 1: add targets to the created transaction */
        for(i = targets; i; i = alpm_list_next(i)) {
                char *target = i->data;
                if(strncmp(target, "local/", 6) == 0) {
                        target += 6;
                }
                if(remove_target(target) == -1) {
                        retval = 1;
                }
        }

        if(retval == 1) {
                goto cleanup;
        }

        /* Step 2: prepare the transaction based on its type, targets and flags */
        if(alpm_trans_prepare(config->handle, &data) == -1) {
                alpm_errno_t err = alpm_errno(config->handle);
                pm_printf(ALPM_LOG_ERROR, _("failed to prepare transaction (%s)\n"),
                        alpm_strerror(err));
                switch(err) {
                        case ALPM_ERR_UNSATISFIED_DEPS:
                                for(i = data; i; i = alpm_list_next(i)) {
                                        alpm_depmissing_t *miss = i->data;
                                        char *depstring = alpm_dep_compute_string(miss->depend);
                                        colon_printf(_("%s: removing %s breaks dependency '%s'\n"),
                                                        miss->target, miss->causingpkg, depstring);
                                        free(depstring);
                                        alpm_depmissing_free(miss);
                                }
                                break;
                        default:
                                break;
                }
                alpm_list_free(data);
                retval = 1;
                goto cleanup;
        }

        /* Search for holdpkg in target list */
        int holdpkg = 0;
        for(i = alpm_trans_get_remove(config->handle); i; i = alpm_list_next(i)) {
                alpm_pkg_t *pkg = i->data;
                if(alpm_list_find(config->holdpkg, alpm_pkg_get_name(pkg), fnmatch_cmp)) {
                        pm_printf(ALPM_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;
        }

        /* Step 3: actually perform the removal */
        alpm_list_t *pkglist = alpm_trans_get_remove(config->handle);
        if(pkglist == NULL) {
                printf(_(" there is nothing to do\n"));
                goto cleanup; /* we are done */
        }

        if(config->print) {
                print_packages(pkglist);
                goto cleanup;
        }

        /* print targets and ask user confirmation */
        display_targets();
        printf("\n");
        if(yesno(_("Do you want to remove these packages?")) == 0) {
                retval = 1;
                goto cleanup;
        }

        if(alpm_trans_commit(config->handle, &data) == -1) {
                pm_printf(ALPM_LOG_ERROR, _("failed to commit transaction (%s)\n"),
                        alpm_strerror(alpm_errno(config->handle)));
                retval = 1;
        }

        FREELIST(data);

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

/* vim: set noet: */