xbps/lib/transaction_check_replaces.c

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/*-
* Copyright (c) 2011-2020 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"
/*
* Processes the array of pkg dictionaries in "pkgs" to
* find matching package replacements via "replaces" pkg obj.
*
* This array contains the unordered list of packages in
* the transaction dictionary.
*/
bool HIDDEN
xbps_transaction_check_replaces(struct xbps_handle *xhp, xbps_array_t pkgs)
{
assert(xhp);
assert(pkgs);
for (unsigned int i = 0; i < xbps_array_count(pkgs); i++) {
xbps_array_t replaces;
xbps_object_t obj, obj2;
xbps_object_iterator_t iter;
xbps_dictionary_t instd, reppkgd;
const char *pkgver = NULL;
char pkgname[XBPS_NAME_SIZE] = {0};
obj = xbps_array_get(pkgs, i);
replaces = xbps_dictionary_get(obj, "replaces");
if (replaces == NULL || xbps_array_count(replaces) == 0)
continue;
if (!xbps_dictionary_get_cstring_nocopy(obj, "pkgver", &pkgver)) {
return false;
}
if (!xbps_pkg_name(pkgname, XBPS_NAME_SIZE, pkgver)) {
return false;
}
iter = xbps_array_iterator(replaces);
assert(iter);
while ((obj2 = xbps_object_iterator_next(iter)) != NULL) {
const char *curpkgver = NULL, *pattern = NULL;
char curpkgname[XBPS_NAME_SIZE] = {0};
bool instd_auto = false, hold = false;
xbps_trans_type_t ttype;
pattern = xbps_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;
if (!xbps_dictionary_get_cstring_nocopy(instd, "pkgver", &curpkgver)) {
xbps_object_iterator_release(iter);
return false;
}
/* ignore pkgs on hold mode */
if (xbps_dictionary_get_bool(instd, "hold", &hold) && hold)
continue;
if (!xbps_pkg_name(curpkgname, XBPS_NAME_SIZE, curpkgver)) {
xbps_object_iterator_release(iter);
return false;
}
/*
* Check that we are not replacing the same package,
* due to virtual packages.
*/
if (strcmp(pkgname, curpkgname) == 0) {
continue;
}
/*
* Make sure to not add duplicates.
*/
xbps_dictionary_get_bool(instd, "automatic-install", &instd_auto);
reppkgd = xbps_find_pkg_in_array(pkgs, curpkgname, 0);
if (reppkgd) {
ttype = xbps_transaction_pkg_type(reppkgd);
if (ttype == XBPS_TRANS_REMOVE || ttype == XBPS_TRANS_HOLD)
continue;
if (!xbps_dictionary_get_cstring_nocopy(reppkgd,
"pkgver", &curpkgver)) {
xbps_object_iterator_release(iter);
return false;
}
if (!xbps_match_virtual_pkg_in_dict(reppkgd, pattern) &&
!xbps_pkgpattern_match(curpkgver, pattern))
continue;
/*
* Package contains replaces="pkgpattern", but the
* package that should be replaced is also in the
* transaction and it's going to be updated.
*/
if (instd_auto) {
if (!xbps_dictionary_set_bool(obj, "automatic-install", instd_auto)) {
xbps_object_iterator_release(iter);
return false;
}
} else {
xbps_dictionary_remove(obj, "automatic-install");
}
if (!xbps_dictionary_set_bool(reppkgd, "replaced", true)) {
xbps_object_iterator_release(iter);
return false;
}
if (!xbps_transaction_pkg_type_set(reppkgd, XBPS_TRANS_REMOVE)) {
xbps_object_iterator_release(iter);
return false;
}
if (xbps_array_replace_dict_by_name(pkgs, reppkgd, curpkgname) != 0) {
xbps_object_iterator_release(iter);
return false;
}
xbps_dbg_printf(xhp,
"Package `%s' in transaction will be "
"replaced by `%s', matched with `%s'\n",
curpkgver, pkgver, pattern);
continue;
}
/*
* 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)) {
if (!xbps_dictionary_set_bool(obj, "automatic-install", instd_auto)) {
xbps_object_iterator_release(iter);
return false;
}
}
/*
* Add package dictionary into the transaction and mark
* it as to be "removed".
*/
if (!xbps_transaction_pkg_type_set(instd, XBPS_TRANS_REMOVE)) {
xbps_object_iterator_release(iter);
return false;
}
if (!xbps_dictionary_set_bool(instd, "replaced", true)) {
xbps_object_iterator_release(iter);
return false;
}
if (!xbps_array_add_first(pkgs, instd)) {
xbps_object_iterator_release(iter);
return false;
}
xbps_dbg_printf(xhp,
"Package `%s' will be replaced by `%s', "
"matched with `%s'\n", curpkgver, pkgver, pattern);
}
xbps_object_iterator_release(iter);
}
return true;
}