transaction_package_replace.c

/*-
 * Copyright (c) 2011-2012 Juan Romero Pardines.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <libgen.h>

#include "xbps_api_impl.h"

int HIDDEN
xbps_transaction_package_replace(struct xbps_handle *xhp)
{
        prop_array_t replaces, unsorted;
        prop_dictionary_t instd, reppkgd, filesd;
        prop_object_t obj, obj2;
        prop_object_iterator_t iter;
        const char *pattern, *pkgname, *curpkgname, *pkgver, *curpkgver;
        char *buf;
        bool instd_auto, sr;
        size_t i;

        unsorted = prop_dictionary_get(xhp->transd, "unsorted_deps");

        for (i = 0; i < prop_array_count(unsorted); i++) {
                obj = prop_array_get(unsorted, i);
                replaces = prop_dictionary_get(obj, "replaces");
                if (replaces == NULL || prop_array_count(replaces) == 0)
                        continue;

                iter = prop_array_iterator(replaces);
                assert(iter);

                while ((obj2 = prop_object_iterator_next(iter)) != NULL) {
                        pattern = prop_string_cstring_nocopy(obj2);
                        /*
                         * Find the installed package that matches the pattern
                         * to be replaced.
                         */
                        if (((instd = xbps_pkgdb_get_pkg(xhp, pattern)) == NULL) &&
                            ((instd = xbps_pkgdb_get_virtualpkg(xhp, pattern)) == NULL))
                                continue;

                        prop_dictionary_get_cstring_nocopy(obj,
                            "pkgname", &pkgname);
                        prop_dictionary_get_cstring_nocopy(obj,
                            "pkgver", &pkgver);
                        prop_dictionary_get_cstring_nocopy(instd,
                            "pkgname", &curpkgname);
                        prop_dictionary_get_cstring_nocopy(instd,
                            "pkgver", &curpkgver);
                        /*
                         * Check that we are not replacing the same package,
                         * due to virtual packages.
                         */
                        if (strcmp(pkgname, curpkgname) == 0)
                                continue;

                        xbps_dbg_printf(xhp,
                            "Package `%s' will be replaced by `%s', "
                            "matched with `%s'\n", curpkgver, pkgver, pattern);
                        instd_auto = false;
                        prop_dictionary_get_bool(instd,
                            "automatic-install", &instd_auto);
                        /*
                         * Package contains replaces="pkgpattern", but the
                         * package that should be replaced is also in the
                         * transaction and it's going to be updated.
                         */
                        if ((reppkgd = xbps_find_pkg_in_array(unsorted, curpkgname)) ||
                            (reppkgd = xbps_find_virtualpkg_in_array(xhp, unsorted, curpkgname))) {
                                xbps_dbg_printf(xhp,
                                    "found replaced pkg "
                                    "in transaction\n");
                                prop_dictionary_set_bool(instd,
                                    "remove-and-update", true);
                                prop_dictionary_set_bool(reppkgd,
                                    "automatic-install", instd_auto);
                                prop_dictionary_set_bool(reppkgd,
                                    "skip-obsoletes", true);
                                xbps_array_replace_dict_by_name(unsorted,
                                   reppkgd, curpkgname);
                        }
                        /*
                         * If new package is providing a virtual package to the
                         * package that we want to replace we should respect
                         * the automatic-install object.
                         */
                        if (xbps_match_virtual_pkg_in_dict(obj,
                            pattern, true) ||
                            xbps_match_virtual_pkg_in_dict(instd,
                            pkgname, false)) {
                                prop_dictionary_set_bool(obj,
                                    "automatic-install", instd_auto);
                        }
                        sr = false;
                        prop_dictionary_get_bool(obj, "softreplace", &sr);
                        if (sr) {
                                prop_dictionary_set_bool(obj,
                                    "automatic-install", instd_auto);
                                prop_dictionary_set_bool(instd,
                                    "softreplace", true);
                                buf = xbps_xasprintf("%s/.%s.plist",
                                    xhp->metadir, curpkgname);
                                filesd = prop_dictionary_internalize_from_zfile(buf);
                                free(buf);
                                assert(filesd != NULL);
                                buf = xbps_xasprintf("%s/.%s.plist",
                                    xhp->metadir, pkgname);
                                if (!prop_dictionary_externalize_to_zfile(filesd, buf)) {
                                        free(buf);
                                        prop_object_release(filesd);
                                        prop_object_iterator_release(iter);
                                        return errno;
                                }
                                prop_object_release(filesd);
                                free(buf);
                        }
                        /*
                         * Add package dictionary into the transaction and mark
                         * it as to be "removed".
                         */
                        prop_dictionary_set_cstring_nocopy(instd,
                            "transaction", "remove");
                        prop_array_add(unsorted, instd);
                }
                prop_object_iterator_release(iter);
        }

        return 0;
}