transaction_pkg_deps.c

/*-
 * Copyright (c) 2008-2020 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 <stdlib.h>
#include <string.h>
#include <errno.h>
 
#include "xbps_api_impl.h"
 
static int
add_missing_reqdep(struct xbps_handle *xhp, const char *reqpkg)
{
        xbps_array_t mdeps;
        xbps_object_iterator_t iter = NULL;
        xbps_object_t obj;
        unsigned int idx = 0;
        bool add_pkgdep, pkgfound, update_pkgdep;
        int rv = 0;
 
        assert(reqpkg != NULL);
 
        add_pkgdep = update_pkgdep = pkgfound = false;
        mdeps = xbps_dictionary_get(xhp->transd, "missing_deps");
 
        iter = xbps_array_iterator(mdeps);
        if (iter == NULL)
                goto out;
 
        while ((obj = xbps_object_iterator_next(iter)) != NULL) {
                const char *curdep, *curver, *pkgver;
                char curpkgnamedep[XBPS_NAME_SIZE];
                char pkgnamedep[XBPS_NAME_SIZE];
 
                assert(xbps_object_type(obj) == XBPS_TYPE_STRING);
                curdep = xbps_string_cstring_nocopy(obj);
                curver = xbps_pkgpattern_version(curdep);
                pkgver = xbps_pkgpattern_version(reqpkg);
                if (curver == NULL || pkgver == NULL)
                        goto out;
                if (!xbps_pkgpattern_name(curpkgnamedep, XBPS_NAME_SIZE, curdep)) {
                        goto out;
                }
                if (!xbps_pkgpattern_name(pkgnamedep, XBPS_NAME_SIZE, reqpkg)) {
                        goto out;
                }
                if (strcmp(pkgnamedep, curpkgnamedep) == 0) {
                        pkgfound = true;
                        if (strcmp(curver, pkgver) == 0) {
                                rv = EEXIST;
                                goto out;
                        }
                        /*
                         * if new dependency version is greater than current
                         * one, store it.
                         */
                        xbps_dbg_printf("Missing pkgdep name matched, curver: %s newver: %s\n", curver, pkgver);
                        if (xbps_cmpver(curver, pkgver) <= 0) {
                                add_pkgdep = false;
                                rv = EEXIST;
                                goto out;
                        }
                        update_pkgdep = true;
                }
                if (pkgfound)
                        break;
 
                idx++;
        }
        add_pkgdep = true;
out:
        if (iter)
                xbps_object_iterator_release(iter);
        if (update_pkgdep)
                xbps_array_remove(mdeps, idx);
        if (add_pkgdep) {
                char *str;
 
                str = xbps_xasprintf("MISSING: %s", reqpkg);
                xbps_array_add_cstring(mdeps, str);
                free(str);
        }
 
        return rv;
}
 
#define MAX_DEPTH       512
 
static int
repo_deps(struct xbps_handle *xhp,
          xbps_array_t pkgs,            /* array of pkgs */
          xbps_dictionary_t pkg_repod,  /* pkg repo dictionary */
          unsigned short *depth)        /* max recursion depth */
{
        xbps_array_t pkg_rdeps = NULL, pkg_provides = NULL;
        xbps_dictionary_t curpkgd = NULL, repopkgd = NULL;
        xbps_trans_type_t ttype;
        pkg_state_t state;
        xbps_object_t obj;
        xbps_object_iterator_t iter;
        const char *curpkg = NULL, *reqpkg = NULL, *pkgver_q = NULL;
        char pkgname[XBPS_NAME_SIZE], reqpkgname[XBPS_NAME_SIZE];
        int rv = 0;
 
        assert(xhp);
        assert(pkgs);
        assert(pkg_repod);
 
        if (*depth >= MAX_DEPTH)
                return ELOOP;
 
        xbps_dictionary_get_cstring_nocopy(pkg_repod, "pkgver", &curpkg);
        pkg_provides = xbps_dictionary_get(pkg_repod, "provides");
        /*
         * Iterate over the list of required run dependencies for
         * current package.
         */
        pkg_rdeps = xbps_dictionary_get(pkg_repod, "run_depends");
        if (xbps_array_count(pkg_rdeps) == 0)
                goto out;
 
        iter = xbps_array_iterator(pkg_rdeps);
        assert(iter);
 
        while ((obj = xbps_object_iterator_next(iter))) {
                bool error = false, foundvpkg = false;
                bool autoinst = true;
 
                ttype = XBPS_TRANS_UNKNOWN;
                reqpkg = xbps_string_cstring_nocopy(obj);
 
                if (xhp->flags & XBPS_FLAG_DEBUG) {
                        xbps_dbg_printf("%s", "");
                        for (unsigned short x = 0; x < *depth; x++) {
                                xbps_dbg_printf_append(" ");
                        }
                        xbps_dbg_printf_append("%s: requires dependency '%s': ", curpkg ? curpkg : " ", reqpkg);
                }
                if ((!xbps_pkgpattern_name(pkgname, sizeof(pkgname), reqpkg)) &&
                    (!xbps_pkg_name(pkgname, sizeof(pkgname), reqpkg))) {
                        xbps_dbg_printf("%s: can't guess pkgname for dependency: %s\n", curpkg, reqpkg);
                        xbps_set_cb_state(xhp, XBPS_STATE_INVALID_DEP, ENXIO, NULL,
                            "%s: can't guess pkgname for dependency '%s'", curpkg, reqpkg);
                        rv = ENXIO;
                        break;
                }
                /*
                 * Pass 0: check if required dependency is ignored.
                 */
                if (xbps_pkg_is_ignored(xhp, pkgname)) {
                        xbps_dbg_printf_append("%s ignored.\n", pkgname);
                        continue;
                }
                /*
                 * Pass 1: check if required dependency is provided as virtual
                 * package via "provides", if true ignore dependency.
                 */
                if (pkg_provides && xbps_match_virtual_pkg_in_array(pkg_provides, reqpkg)) {
                        xbps_dbg_printf_append("%s is a vpkg provided by %s, ignored.\n", pkgname, curpkg);
                        continue;
                }
                /*
                 * Pass 2: check if required dependency has been already
                 * added in the transaction dictionary.
                 */
                if ((curpkgd = xbps_find_pkg_in_array(pkgs, reqpkg, 0)) ||
                    (curpkgd = xbps_find_virtualpkg_in_array(xhp, pkgs, reqpkg, 0))) {
                        xbps_trans_type_t ttype_q = xbps_transaction_pkg_type(curpkgd);
                        xbps_dictionary_get_cstring_nocopy(curpkgd, "pkgver", &pkgver_q);
                        if (ttype_q != XBPS_TRANS_REMOVE && ttype_q != XBPS_TRANS_HOLD) {
                                xbps_dbg_printf_append(" (%s queued %d)\n", pkgver_q, ttype_q);
                                continue;
                        }
                }
                /*
                 * Pass 3: check if required dependency is already installed
                 * and its version is fully matched.
                 */
                if ((curpkgd = xbps_pkgdb_get_pkg(xhp, pkgname)) == NULL) {
                        if ((curpkgd = xbps_pkgdb_get_virtualpkg(xhp, pkgname))) {
                                foundvpkg = true;
                        }
                }
                if (xhp->flags & XBPS_FLAG_DOWNLOAD_ONLY) {
                        /*
                         * if XBPS_FLAG_DOWNLOAD_ONLY always assume
                         * all deps are not installed. This way one can download
                         * the whole set of binary packages to perform an
                         * off-line installation later on.
                         */
                        curpkgd = NULL;
                }
 
                if (curpkgd == NULL) {
                        if (errno && errno != ENOENT) {
                                /* error */
                                rv = errno;
                                xbps_dbg_printf("failed to find installed pkg for `%s': %s\n", reqpkg, strerror(rv));
                                break;
                        }
                        /* Required dependency not installed */
                        xbps_dbg_printf_append("not installed.\n");
                        ttype = XBPS_TRANS_INSTALL;
                        state = XBPS_PKG_STATE_NOT_INSTALLED;
                } else {
                        /*
                         * Required dependency is installed, check if its version can
                         * satisfy the requirements.
                         */
                        xbps_dictionary_get_cstring_nocopy(curpkgd, "pkgver", &pkgver_q);
 
                        /* Check its state */
                        if ((rv = xbps_pkg_state_dictionary(curpkgd, &state)) != 0) {
                                break;
                        }
 
                        if (foundvpkg && xbps_match_virtual_pkg_in_dict(curpkgd, reqpkg)) {
                                /*
                                 * Check if required dependency is a virtual package and is satisfied
                                 * by an installed package.
                                 */
                                xbps_dbg_printf_append("[virtual] satisfied by `%s'.\n", pkgver_q);
                                continue;
                        }
                        rv = xbps_pkgpattern_match(pkgver_q, reqpkg);
                        if (rv == 0) {
                                char curpkgname[XBPS_NAME_SIZE];
                                /*
                                 * The version requirement is not satisfied.
                                 */
                                if (!xbps_pkg_name(curpkgname, sizeof(curpkgname), pkgver_q)) {
                                        abort();
                                }
 
                                if (strcmp(pkgname, curpkgname)) {
                                        xbps_dbg_printf_append("not installed `%s (vpkg)'", pkgver_q);
                                        if (xbps_dictionary_get(curpkgd, "hold")) {
                                                ttype = XBPS_TRANS_HOLD;
                                                xbps_dbg_printf_append(" on hold state! ignoring package.\n");
                                                rv = ENODEV;
                                        } else {
                                                xbps_dbg_printf_append("\n");
                                                ttype = XBPS_TRANS_INSTALL;
                                        }
                                } else {
                                        xbps_dbg_printf_append("installed `%s', must be updated", pkgver_q);
                                        if (xbps_dictionary_get(curpkgd, "hold")) {
                                                xbps_dbg_printf_append(" on hold state! ignoring package.\n");
                                                ttype = XBPS_TRANS_HOLD;
                                                rv = ENODEV;
                                        } else {
                                                xbps_dbg_printf_append("\n");
                                                ttype = XBPS_TRANS_UPDATE;
                                        }
                                }
                                /*
                                 * Not satisfied and package on hold.
                                 */
                                if (rv == ENODEV) {
                                        rv = add_missing_reqdep(xhp, reqpkg);
                                        if (rv != 0 && rv != EEXIST) {
                                                xbps_dbg_printf("`%s': add_missing_reqdep failed\n", reqpkg);
                                                break;
                                        } else if (rv == EEXIST) {
                                                xbps_dbg_printf("`%s' missing dep already added.\n", reqpkg);
                                                rv = 0;
                                                continue;
                                        } else {
                                                xbps_dbg_printf("`%s' added into the missing deps array.\n", reqpkg);
                                                continue;
                                        }
                                }
                        } else if (rv == 1) {
                                /*
                                 * The version requirement is satisfied.
                                 */
                                rv = 0;
                                if (state == XBPS_PKG_STATE_UNPACKED) {
                                        /*
                                         * Package matches the dependency pattern but was only unpacked,
                                         * configure pkg.
                                         */
                                        xbps_dbg_printf_append("installed `%s', must be configured.\n", pkgver_q);
                                        ttype = XBPS_TRANS_CONFIGURE;
                                } else if (state == XBPS_PKG_STATE_INSTALLED) {
                                        /*
                                         * Package matches the dependency pattern and is fully installed,
                                         * skip to next one.
                                         */
                                        xbps_dbg_printf_append("installed `%s'.\n", pkgver_q);
                                        continue;
                                }
                        } else {
                                /* error matching pkgpattern */
                                xbps_dbg_printf("failed to match pattern %s with %s\n", reqpkg, pkgver_q);
                                break;
                        }
                }
                /*
                 * Pass 4: find required dependency in repository pool.
                 * If dependency does not match add pkg into the missing
                 * deps array and pass to next one.
                 */
                if (xbps_dictionary_get(curpkgd, "repolock")) {
                        const char *repourl = NULL;
                        struct xbps_repo *repo = NULL;
                        xbps_dbg_printf("`%s' is repolocked, looking at single repository.\n", reqpkg);
                        xbps_dictionary_get_cstring_nocopy(curpkgd, "repository", &repourl);
                        if (repourl && (repo = xbps_regget_repo(xhp, repourl))) {
                                repopkgd = xbps_repo_get_pkg(repo, reqpkg);
                        } else {
                                repopkgd = NULL;
                        }
                } else {
                        repopkgd = xbps_rpool_get_pkg(xhp, reqpkg);
                        if (!repopkgd) {
                                repopkgd = xbps_rpool_get_virtualpkg(xhp, reqpkg);
                        }
                }
                if (repopkgd == NULL) {
                        /* pkg not found, there was some error */
                        if (errno && errno != ENOENT) {
                                xbps_dbg_printf("failed to find pkg for `%s' in rpool: %s\n", reqpkg, strerror(errno));
                                rv = errno;
                                break;
                        }
                        rv = add_missing_reqdep(xhp, reqpkg);
                        if (rv != 0 && rv != EEXIST) {
                                xbps_dbg_printf("`%s': add_missing_reqdep failed\n", reqpkg);
                                break;
                        } else if (rv == EEXIST) {
                                xbps_dbg_printf("`%s' missing dep already added.\n", reqpkg);
                                rv = 0;
                                continue;
                        } else {
                                xbps_dbg_printf("`%s' added into the missing deps array.\n", reqpkg);
                                continue;
                        }
                }
 
 
                xbps_dictionary_get_cstring_nocopy(repopkgd, "pkgver", &pkgver_q);
                if (!xbps_pkg_name(reqpkgname, sizeof(reqpkgname), pkgver_q)) {
                        rv = EINVAL;
                        break;
                }
                /*
                 * Check dependency validity.
                 */
                if (!xbps_pkg_name(pkgname, sizeof(pkgname), curpkg)) {
                        rv = EINVAL;
                        break;
                }
                if (strcmp(pkgname, reqpkgname) == 0) {
                        xbps_dbg_printf_append("[ignoring wrong dependency %s (depends on itself)]\n", reqpkg);
                        xbps_remove_string_from_array(pkg_rdeps, reqpkg);
                        continue;
                }
                /*
                 * Installed package must be updated, check if dependency is
                 * satisfied.
                 */
                if (ttype == XBPS_TRANS_UPDATE) {
                        switch (xbps_pkgpattern_match(pkgver_q, reqpkg)) {
                                case 0: /* nomatch */
                                        break;
                                case 1: /* match */
                                        if (!xbps_pkg_name(pkgname, sizeof(pkgname), pkgver_q)) {
                                                abort();
                                        }
                                        /*
                                         * If there's an update in transaction,
                                         * it's assumed version is greater.
                                         * So dependency pattern matching didn't
                                         * succeed... return ENODEV.
                                         */
                                        if (xbps_find_pkg_in_array(pkgs, pkgname, XBPS_TRANS_UPDATE)) {
                                                error = true;
                                                rv = ENODEV;
                                        }
                                        break;
                                default:
                                        error = true;
                                        rv = EINVAL;
                                        break;
                        }
                        if (error)
                                break;
                }
                pkg_rdeps = xbps_dictionary_get(repopkgd, "run_depends");
                if (xbps_array_count(pkg_rdeps)) {
                        /*
                         * Process rundeps for current pkg found in rpool.
                         */
                        if (xhp->flags & XBPS_FLAG_DEBUG) {
                                xbps_dbg_printf("%s", "");
                                for (unsigned short x = 0; x < *depth; x++) {
                                        xbps_dbg_printf_append(" ");
                                }
                                xbps_dbg_printf_append("%s: finding dependencies:\n", pkgver_q);
                        }
                        (*depth)++;
                        rv = repo_deps(xhp, pkgs, repopkgd, depth);
                        if (rv != 0) {
                                xbps_dbg_printf("Error checking %s for rundeps: %s\n", reqpkg, strerror(rv));
                                break;
                        }
                }
                if (xhp->flags & XBPS_FLAG_DOWNLOAD_ONLY) {
                        ttype = XBPS_TRANS_DOWNLOAD;
                } else if (xbps_dictionary_get(curpkgd, "hold")) {
                        ttype = XBPS_TRANS_HOLD;
                }
                if (ttype == XBPS_TRANS_UPDATE || ttype == XBPS_TRANS_CONFIGURE) {
                        /*
                         * If the package is already installed preserve the installation mode,
                         * which is not automatic if automatic-install is not set.
                         */
                        bool pkgd_auto = false;
                        xbps_dictionary_get_bool(curpkgd, "automatic-install", &pkgd_auto);
                        autoinst = pkgd_auto;
                }
                /*
                 * All deps were processed, store pkg in transaction.
                 */
                if (!xbps_transaction_pkg_type_set(repopkgd, ttype)) {
                        rv = EINVAL;
                        xbps_dbg_printf("xbps_transaction_pkg_type_set failed for `%s': %s\n", reqpkg, strerror(rv));
                        break;
                }
                if (!xbps_transaction_store(xhp, pkgs, repopkgd, autoinst)) {
                        rv = EINVAL;
                        xbps_dbg_printf("xbps_transaction_store failed for `%s': %s\n", reqpkg, strerror(rv));
                        break;
                }
        }
        xbps_object_iterator_release(iter);
out:
        (*depth)--;
 
        return rv;
}
 
int HIDDEN
xbps_transaction_pkg_deps(struct xbps_handle *xhp,
                          xbps_array_t pkgs,
                          xbps_dictionary_t pkg_repod)
{
        const char *pkgver;
        unsigned short depth = 0;
 
        assert(xhp);
        assert(pkgs);
        assert(pkg_repod);
 
        xbps_dictionary_get_cstring_nocopy(pkg_repod, "pkgver", &pkgver);
        xbps_dbg_printf("Finding required dependencies for '%s':\n", pkgver);
        /*
         * This will find direct and indirect deps, if any of them is not
         * there it will be added into the missing_deps array.
         */
        return repo_deps(xhp, pkgs, pkg_repod, &depth);
}