rindex_get.c

/*-
 * Copyright (c) 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 "xbps_api_impl.h"

/**
 * @file lib/rindex_get.c
 * @brief Repository index functions
 * @defgroup rindex Repository index functions
 */
static prop_dictionary_t
match_pkg_by_pkgver(prop_dictionary_t repod, const char *p)
{
        prop_dictionary_t d = NULL;
        const char *pkgver;
        char *pkgname;

        /* exact match by pkgver */
        if ((pkgname = xbps_pkg_name(p)) == NULL)
                return NULL;

        d = prop_dictionary_get(repod, pkgname);
        if (d) {
                prop_dictionary_get_cstring_nocopy(d, "pkgver", &pkgver);
                if (strcmp(pkgver, p))
                        d = NULL;
        }

        free(pkgname);
        return d;
}

static prop_dictionary_t
match_pkg_by_pattern(prop_dictionary_t repod, const char *p)
{
        prop_dictionary_t d = NULL;
        const char *pkgver;
        char *pkgname;

        /* match by pkgpattern in pkgver */
        if ((pkgname = xbps_pkgpattern_name(p)) == NULL) {
                if ((pkgname = xbps_pkg_name(p)))
                        return match_pkg_by_pkgver(repod, p);

                return NULL;
        }

        d = prop_dictionary_get(repod, pkgname);
        if (d) {
                prop_dictionary_get_cstring_nocopy(d, "pkgver", &pkgver);
                assert(pkgver);
                if (!xbps_pkgpattern_match(pkgver, p))
                        d = NULL;
        }

        free(pkgname);
        return d;
}

const char HIDDEN *
vpkg_user_conf(struct xbps_handle *xhp,
               const char *vpkg,
               bool bypattern)
{
        const char *vpkgver, *pkg = NULL;
        char *vpkgname = NULL, *tmp;
        size_t i, j, cnt;

        if (xhp->cfg == NULL)
                return NULL;

        if ((cnt = cfg_size(xhp->cfg, "virtual-package")) == 0) {
                /* no virtual packages configured */
                return NULL;
        }

        for (i = 0; i < cnt; i++) {
                cfg_t *sec = cfg_getnsec(xhp->cfg, "virtual-package", i);
                for (j = 0; j < cfg_size(sec, "targets"); j++) {
                        tmp = NULL;
                        vpkgver = cfg_getnstr(sec, "targets", j);
                        if (strchr(vpkgver, '_') == NULL) {
                                tmp = xbps_xasprintf("%s_1", vpkgver);
                                vpkgname = xbps_pkg_name(tmp);
                                free(tmp);
                        } else {
                                vpkgname = xbps_pkg_name(vpkgver);
                        }
                        if (vpkgname == NULL)
                                break;
                        if (bypattern) {
                                if (!xbps_pkgpattern_match(vpkgver, vpkg)) {
                                        free(vpkgname);
                                        continue;
                                }
                        } else {
                                if (strcmp(vpkg, vpkgname)) {
                                        free(vpkgname);
                                        continue;
                                }
                        }
                        /* virtual package matched in conffile */
                        pkg = cfg_title(sec);
                        xbps_dbg_printf(xhp,
                            "matched vpkg in conf `%s' for %s\n",
                            pkg, vpkg);
                        free(vpkgname);
                        break;
                }
        }
        return pkg;
}

prop_dictionary_t
xbps_rindex_get_virtualpkg(struct xbps_rindex *rpi, const char *pkg)
{
        prop_object_t obj;
        prop_object_iterator_t iter;
        prop_dictionary_t pkgd = NULL;
        const char *vpkg;
        bool found = false, bypattern = false;

        if (xbps_pkgpattern_version(pkg))
                bypattern = true;

        /* Try matching vpkg from configuration files */
        vpkg = vpkg_user_conf(rpi->xhp, pkg, bypattern);
        if (vpkg != NULL) {
                if (xbps_pkgpattern_version(vpkg))
                        pkgd = match_pkg_by_pattern(rpi->repod, vpkg);
                else if (xbps_pkg_version(vpkg))
                        pkgd = match_pkg_by_pkgver(rpi->repod, vpkg);
                else
                        pkgd = prop_dictionary_get(rpi->repod, vpkg);

                if (pkgd) {
                        found = true;
                        goto out;
                }
        }

        /* ... otherwise match the first one in dictionary */
        iter = prop_dictionary_iterator(rpi->repod);
        assert(iter);

        while ((obj = prop_object_iterator_next(iter))) {
                pkgd = prop_dictionary_get_keysym(rpi->repod, obj);
                if (xbps_match_virtual_pkg_in_dict(pkgd, pkg, bypattern)) {
                        found = true;
                        break;
                }
        }
        prop_object_iterator_release(iter);

out:
        if (found) {
                prop_dictionary_set_cstring_nocopy(pkgd,
                                "repository", rpi->uri);
                return pkgd;
        }
        return NULL;
}

prop_dictionary_t
xbps_rindex_get_pkg(struct xbps_rindex *rpi, const char *pkg)
{
        prop_dictionary_t pkgd = NULL;

        if (xbps_pkgpattern_version(pkg))
                pkgd = match_pkg_by_pattern(rpi->repod, pkg);
        else if (xbps_pkg_version(pkg))
                pkgd = match_pkg_by_pkgver(rpi->repod, pkg);
        else
                pkgd = prop_dictionary_get(rpi->repod, pkg);

        if (pkgd) {
                prop_dictionary_set_cstring_nocopy(pkgd,
                                "repository", rpi->uri);
                return pkgd;
        }

        return NULL;
}