xbps/lib/sortdeps.c

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/*-
* Copyright (c) 2009-2011 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 <stdlib.h>
#include <string.h>
#include <errno.h>
#include <xbps_api.h>
#include "xbps_api_impl.h"
/*
* Sorting algorithm for packages in the transaction dictionary.
* The transaction dictionary contains all package dictionaries found from
* the repository plist index file in the "unsorted_deps" array.
*
* When a package has no rundeps or all rundeps are satisfied, the package
* dictionary is added into the "packages" array and it is removed from the
* "unsorted_deps" array; that means the package has been sorted in the
* transaction.
*
* It will loop until all packages are processed and will check that
* the number of packages added into the "packages" array is the same than
* it was in the "unsorted_deps" array.
*/
int HIDDEN
xbps_sort_pkg_deps(prop_dictionary_t transd)
{
prop_array_t sorted, unsorted, rundeps, missingdeps;
prop_object_t obj, obj2;
prop_object_iterator_t iter, iter2;
size_t ndeps = 0, rundepscnt = 0, cnt = 0;
const char *pkgname, *pkgver, *str;
char *pkgnamedep;
int rv = 0;
assert(transd != NULL);
/*
* If there are missing dependencies, bail out.
*/
missingdeps = prop_dictionary_get(transd, "missing_deps");
if (prop_array_count(missingdeps) > 0) {
xbps_dbg_printf("missing dependencies! won't "
"continue sorting\n");
return ENOENT;
}
sorted = prop_array_create();
if (sorted == NULL)
return ENOMEM;
/*
* Add sorted packages array into transaction dictionary (empty).
*/
if (!prop_dictionary_set(transd, "packages", sorted)) {
rv = EINVAL;
goto out;
}
/*
* All required deps are satisfied (already installed).
*/
unsorted = prop_dictionary_get(transd, "unsorted_deps");
if (prop_array_count(unsorted) == 0) {
prop_dictionary_set(transd, "packages", sorted);
return 0;
}
ndeps = prop_array_count(unsorted);
iter = prop_array_iterator(unsorted);
if (iter == NULL) {
prop_object_release(sorted);
return ENOMEM;
}
again:
/*
* Order all deps by looking at its run_depends array.
*/
while ((obj = prop_object_iterator_next(iter)) != NULL) {
prop_dictionary_get_cstring_nocopy(obj, "pkgname", &pkgname);
prop_dictionary_get_cstring_nocopy(obj, "pkgver", &pkgver);
xbps_dbg_printf("Sorting package '%s': ", pkgver);
if (xbps_find_pkg_in_dict_by_name(transd,
"packages", pkgname)) {
xbps_dbg_printf_append("skipping, already queued.\n",
pkgname);
continue;
}
/*
* Packages that don't have deps go unsorted, because
* it doesn't matter.
*/
rundeps = prop_dictionary_get(obj, "run_depends");
if (rundeps == NULL || prop_array_count(rundeps) == 0) {
xbps_dbg_printf_append("added (no rundeps) into "
"the sorted queue.\n");
prop_array_add(sorted, obj);
if (!xbps_remove_pkg_from_dict(transd,
"unsorted_deps", pkgname)) {
xbps_dbg_printf("can't remove %s from "
"unsorted_deps array!\n", pkgname);
}
cnt++;
continue;
}
iter2 = prop_array_iterator(rundeps);
if (iter2 == NULL) {
rv = ENOMEM;
goto out;
}
/*
* Iterate over the run_depends array, and find out if they
* were already added in the sorted list.
*/
xbps_dbg_printf_append("\n");
xbps_dbg_printf("Checking '%s' run depends for sorting...\n",
pkgver);
while ((obj2 = prop_object_iterator_next(iter2)) != NULL) {
str = prop_string_cstring_nocopy(obj2);
if (str == NULL) {
rv = EINVAL;
goto out;
}
pkgnamedep = xbps_get_pkgpattern_name(str);
if (pkgnamedep == NULL) {
rv = EINVAL;
goto out;
}
xbps_dbg_printf(" Required dependency '%s': ", str);
/*
* If dependency is already satisfied or queued,
* pass to the next one.
*/
if (xbps_check_is_installed_pkg(str)) {
rundepscnt++;
xbps_dbg_printf_append("installed.\n");
} else if (xbps_find_pkg_in_dict_by_name(transd,
"packages", pkgnamedep)) {
xbps_dbg_printf_append("queued.\n");
rundepscnt++;
} else {
xbps_dbg_printf_append("not installed.\n");
}
free(pkgnamedep);
}
prop_object_iterator_release(iter2);
/* Add dependency if all its required deps are already added */
if (prop_array_count(rundeps) == rundepscnt) {
prop_array_add(sorted, obj);
if (!xbps_remove_pkg_from_dict(transd,
"unsorted_deps", pkgname)) {
xbps_dbg_printf("can't remove %s from "
"unsorted_deps array!\n", pkgname);
}
xbps_dbg_printf("Added package '%s' to the sorted "
"queue (all rundeps satisfied).\n\n", pkgver);
rundepscnt = 0;
cnt++;
continue;
}
xbps_dbg_printf("Unsorted package '%s' has missing "
"rundeps (missing %zu).\n\n", pkgver,
prop_array_count(rundeps) - rundepscnt);
rundepscnt = 0;
}
/* Iterate until all deps are processed. */
if (cnt < ndeps) {
xbps_dbg_printf("Missing required deps! queued: %zu "
"required: %zu.\n", cnt, ndeps);
prop_object_iterator_reset(iter);
xbps_dbg_printf("total iteratons %zu\n", cnt);
goto again;
}
prop_object_iterator_release(iter);
/*
* Sanity check that the array contains the same number of
* objects than the total number of required dependencies.
*/
if (ndeps != prop_array_count(sorted)) {
xbps_dbg_printf("wrong sorted deps cnt %zu vs %zu\n",
ndeps, prop_array_count(sorted));
rv = EINVAL;
goto out;
}
/*
* We are done, all packages were sorted... remove the
* temporary array with unsorted packages.
*/
prop_dictionary_remove(transd, "unsorted_deps");
out:
if (rv != 0)
prop_dictionary_remove(transd, "packages");
prop_object_release(sorted);
return rv;
}