package_fulldeptree.c

/*-
 * Copyright (c) 2014-2020 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 "xbps_api_impl.h"
#include "uthash.h"
 
struct item;
 
struct depn {
        struct depn *dnext;
        struct item *item;
};
 
struct item {
        char *pkgn;             /* hash key */
        const char *pkgver;
        xbps_array_t rdeps;
        struct depn *dbase;
        UT_hash_handle hh;
};
 
static struct item *items = NULL;
static xbps_array_t result;
 
static struct item *
lookupItem(const char *pkgn)
{
        struct item *item = NULL;
 
        assert(pkgn);
 
        HASH_FIND_STR(items, pkgn, item);
        return item;
}
 
static struct item *
addItem(xbps_array_t rdeps, const char *pkgn, const char *pkgver)
{
        struct item *item = NULL;
 
        assert(pkgn);
        assert(pkgver);
 
        HASH_FIND_STR(items, pkgn, item);
        if (item)
                return item;
 
        item = malloc(sizeof(*item));
        assert(item);
        item->pkgn = strdup(pkgn);
        item->pkgver = pkgver;
        item->rdeps = rdeps;
        item->dbase = NULL;
        HASH_ADD_KEYPTR(hh, items, item->pkgn, strlen(pkgn), item);
 
        return item;
}
 
static void
addDepn(struct item *item, struct item *xitem)
{
        struct depn *depn = calloc(1, sizeof(*depn));
 
        assert(depn);
        assert(item);
        assert(xitem);
 
        depn->item = item;
        depn->dnext = xitem->dbase;
        xitem->dbase = depn;
}
 
static void
add_deps_recursive(struct item *item, bool first)
{
        struct depn *dep;
        xbps_string_t str;
 
        if (xbps_match_string_in_array(result, item->pkgver))
                return;
 
        for (dep = item->dbase; dep; dep = dep->dnext)
                add_deps_recursive(dep->item, false);
 
        if (first)
                return;
 
        str = xbps_string_create_cstring(item->pkgver);
        assert(str);
        xbps_array_add_first(result, str);
        xbps_object_release(str);
}
 
static void
cleanup(void)
{
        struct item *item, *itmp;
 
        HASH_ITER(hh, items, item, itmp) {
                HASH_DEL(items, item);
                if (item->dbase)
                        free(item->dbase);
                free(item->pkgn);
                free(item);
        }
}
 
/*
 * Recursively calculate all dependencies.
 */
static struct item *
ordered_depends(struct xbps_handle *xhp, xbps_dictionary_t pkgd, bool rpool,
                size_t depth)
{
        xbps_array_t rdeps, provides;
        xbps_string_t str;
        struct item *item = NULL, *xitem = NULL;
        const char *pkgver = NULL, *pkgname = NULL;
 
        assert(xhp);
        assert(pkgd);
 
        rdeps = xbps_dictionary_get(pkgd, "run_depends");
        provides = xbps_dictionary_get(pkgd, "provides");
        xbps_dictionary_get_cstring_nocopy(pkgd, "pkgname", &pkgname);
 
        item = lookupItem(pkgname);
        if (item) {
                add_deps_recursive(item, depth == 0);
                return item;
        }
 
        if (!xbps_dictionary_get_cstring_nocopy(pkgd, "pkgver", &pkgver)) {
                abort();
        }
 
        item = addItem(rdeps, pkgname, pkgver);
        assert(item);
 
        for (unsigned int i = 0; i < xbps_array_count(rdeps); i++) {
                xbps_dictionary_t curpkgd;
                const char *curdep = NULL;
                char curdepname[XBPS_NAME_SIZE];
 
                xbps_array_get_cstring_nocopy(rdeps, i, &curdep);
                if (rpool) {
                        if ((curpkgd = xbps_rpool_get_pkg(xhp, curdep)) == NULL)
                                curpkgd = xbps_rpool_get_virtualpkg(xhp, curdep);
                } else {
                        if ((curpkgd = xbps_pkgdb_get_pkg(xhp, curdep)) == NULL)
                                curpkgd = xbps_pkgdb_get_virtualpkg(xhp, curdep);
                        /* Ignore missing local runtime dependencies, because ignorepkg */
                        if (curpkgd == NULL)
                                continue;
                }
                if (curpkgd == NULL) {
                        /* package depends on missing dependencies */
                        xbps_dbg_printf("%s: missing dependency '%s'\n", pkgver, curdep);
                        errno = ENODEV;
                        return NULL;
                }
                if ((!xbps_pkgpattern_name(curdepname, XBPS_NAME_SIZE, curdep)) &&
                    (!xbps_pkg_name(curdepname, XBPS_NAME_SIZE, curdep))) {
                        abort();
                }
 
                if (provides && xbps_match_pkgname_in_array(provides, curdepname)) {
                        xbps_dbg_printf("%s: ignoring dependency %s "
                            "already in provides\n", pkgver, curdep);
                        continue;
                }
                xitem = lookupItem(curdepname);
                if (xitem) {
                        add_deps_recursive(xitem, false);
                        continue;
                }
                xitem = ordered_depends(xhp, curpkgd, rpool, depth+1);
                if (xitem == NULL) {
                        /* package depends on missing dependencies */
                        xbps_dbg_printf("%s: missing dependency '%s'\n", pkgver, curdep);
                        errno = ENODEV;
                        return NULL;
                }
                assert(xitem);
                addDepn(item, xitem);
        }
        /* all deps were processed, add item to head */
        if (depth > 0 && !xbps_match_string_in_array(result, item->pkgver)) {
                str = xbps_string_create_cstring(item->pkgver);
                assert(str);
                xbps_array_add_first(result, str);
                xbps_object_release(str);
        }
        return item;
}
 
xbps_array_t HIDDEN
xbps_get_pkg_fulldeptree(struct xbps_handle *xhp, const char *pkg, bool rpool)
{
        xbps_dictionary_t pkgd;
 
        result = xbps_array_create();
        assert(result);
 
        if (rpool) {
                if (((pkgd = xbps_rpool_get_pkg(xhp, pkg)) == NULL) &&
                    ((pkgd = xbps_rpool_get_virtualpkg(xhp, pkg)) == NULL))
                        return NULL;
        } else {
                if (((pkgd = xbps_pkgdb_get_pkg(xhp, pkg)) == NULL) &&
                    ((pkgd = xbps_pkgdb_get_virtualpkg(xhp, pkg)) == NULL))
                        return NULL;
        }
        if (ordered_depends(xhp, pkgd, rpool, 0) == NULL)
                return NULL;
 
        cleanup();
        return result;
}