Convert the backend to modules

2026-05-09 10:28:52 +02:00
parent dc33404734
commit 8dd9efa88d
12 changed files with 761 additions and 870 deletions
@@ -0,0 +1,776 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+module;
+
+#include "config.h"
+#include <filesystem>
+#include <gio/gio.h>
+#include <cstdint>
+#include <stdlib.h>
+#include <iostream>
+#include <zlib.h>
+#include <curl/curl.h>
+#include <glib/gstdio.h>
+#include <sqlite3.h>
+
+export module katja.job;
+
+import katja.utils;
+import katja.pkgtools;
+import katja.slackpkg;
+
+namespace katja
+{
+static GSList *repos = nullptr;
+
+void pk_backend_initialize(GKeyFile *conf)
+{
+    char *path, **groups;
+    int ret;
+    gushort i;
+    gsize groups_len;
+    GFile *conf_file;
+    GFileInfo *file_info;
+    GKeyFile *key_conf;
+    GError *err = nullptr;
+    void *repo = nullptr;
+    sqlite3 *db;
+    sqlite3_stmt *stmt;
+
+    g_debug("backend: initialize");
+    curl_global_init(CURL_GLOBAL_DEFAULT);
+
+    /* Open the database. We will need it to save the time the configuration file was last modified. */
+    path = g_build_filename(LOCALSTATEDIR, "cache", "PackageKit", "metadata", "metadata.db", nullptr);
+    if (sqlite3_open(path, &db) != SQLITE_OK)
+    {
+        g_error("%s: %s", path, sqlite3_errmsg(db));
+    }
+    g_free(path);
+
+    /* Read the configuration file */
+    key_conf = g_key_file_new();
+    path = g_build_filename(SYSCONFDIR, "PackageKit", "Slackware.conf", nullptr);
+    g_key_file_load_from_file(key_conf, path, G_KEY_FILE_NONE, &err);
+    if (err)
+    {
+        g_error("%s: %s", path, err->message);
+        g_error_free(err);
+    }
+
+    conf_file = g_file_new_for_path(path);
+    if (!(file_info = g_file_query_info(conf_file,
+                                        "time::modified-usec",
+                                        G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                                        nullptr,
+                                        &err)))
+    {
+        g_error("%s", err->message);
+        g_error_free(err);
+    }
+
+    if ((ret = sqlite3_prepare_v2(db,
+                    "UPDATE cache_info SET value = ? WHERE key LIKE 'last_modification'",
+                    -1,
+                    &stmt,
+                    nullptr)) == SQLITE_OK) {
+        ret = sqlite3_bind_int(stmt, 1, g_file_info_get_attribute_uint32(file_info, "time::modified-usec"));
+        if (ret == SQLITE_OK)
+        {
+            ret = sqlite3_step(stmt);
+        }
+        sqlite3_finalize(stmt);
+    }
+    if ((ret != SQLITE_OK) && (ret != SQLITE_DONE))
+    {
+        g_error("%s: %s", path, sqlite3_errstr(ret));
+    }
+    else if (!sqlite3_changes(db))
+    {
+        g_error("Failed to update database: %s", path);
+    }
+
+    g_object_unref(file_info);
+    g_object_unref(conf_file);
+    sqlite3_close_v2(db);
+    g_free(path);
+
+    /* Initialize an object for each well-formed repository */
+    groups = g_key_file_get_groups(key_conf, &groups_len);
+    for (i = 0; i < groups_len; i++)
+    {
+        char *blacklist = g_key_file_get_string(key_conf, groups[i], "Blacklist", nullptr);
+        char *mirror = g_key_file_get_string(key_conf, groups[i], "Mirror", nullptr);
+
+        if (g_key_file_has_key(key_conf, groups[i], "Priority", nullptr))
+        {
+            repo = new Slackpkg(groups[i], mirror, i + 1, blacklist,
+                    g_key_file_get_string_list(key_conf, groups[i], "Priority", nullptr, nullptr));
+            repos = g_slist_append(repos, repo);
+        }
+        g_free(mirror);
+        g_free(blacklist);
+    }
+    g_free(groups);
+
+    g_key_file_free(key_conf);
+}
+
+void pk_backend_destroy()
+{
+    g_debug("backend: destroy");
+
+    for (GSList *l = repos; l; l = g_slist_next(l))
+    {
+        delete static_cast<Pkgtools *>(l->data);
+    }
+
+    g_slist_free(repos);
+    curl_global_cleanup();
+}
+
+JobData *pk_backend_start_job()
+{
+    char *db_filename = nullptr;
+    JobData *job_data = g_new0(JobData, 1);
+
+    db_filename = g_build_filename(LOCALSTATEDIR, "cache", "PackageKit", "metadata", "metadata.db", nullptr);
+    if (sqlite3_open(db_filename, &job_data->db) == SQLITE_OK) { /* Some SQLite settings */
+        sqlite3_exec(job_data->db, "PRAGMA foreign_keys = ON", nullptr, nullptr, nullptr);
+    }
+    else
+    {
+        std::cerr << db_filename << ": " << sqlite3_errmsg(job_data->db) << std::endl;
+        goto out;
+    }
+
+out:
+    g_free(db_filename);
+
+    return job_data;
+}
+
+void pk_backend_stop_job(JobData *job_data)
+{
+    if (job_data->curl)
+    {
+        curl_easy_cleanup(job_data->curl);
+    }
+
+    sqlite3_close(job_data->db);
+    g_free(job_data);
+}
+
+void pk_backend_search_thread(JobData *job_data, GVariant *params, const char *user_data)
+{
+    char **vals;
+    // -1 means requesting not installed, 1 - installed, 0 - no filters.
+    guint64 filters;
+    g_variant_get(params, "(t^a&s)", &filters, &vals);
+    char *search = g_strjoinv("%", vals);
+
+    const char *generate_query = "SELECT (p1.name || ';' || p1.ver || ';' || p1.arch || ';' || r.repo), p1.summary, "
+            "p1.full_name FROM pkglist AS p1 NATURAL JOIN repos AS r "
+            "WHERE p1.%s LIKE '%%%q%%' AND p1.ext NOT LIKE 'obsolete' AND p1.repo_order = "
+            "(SELECT MIN(p2.repo_order) FROM pkglist AS p2 WHERE p2.name = p1.name GROUP BY p2.name)";
+    char *query = sqlite3_mprintf(generate_query, user_data, search);
+
+    sqlite3_stmt *stmt;
+    if ((sqlite3_prepare_v2(job_data->db, query, -1, &stmt, nullptr) == SQLITE_OK))
+    {
+        /* Now we're ready to output all packages */
+        while (sqlite3_step(stmt) == SQLITE_ROW)
+        {
+            katja::Info info = katja::is_installed(
+                    reinterpret_cast<const char *>(sqlite3_column_text(stmt, 2)));
+
+            if ((info == katja::Info::installed || info == katja::Info::updating)
+                    && filters != -1)
+            {
+                job_data->package(katja::Info::installed,
+                        reinterpret_cast<const char *>(sqlite3_column_text(stmt, 0)),
+                        reinterpret_cast<const char *>(sqlite3_column_text(stmt, 1)));
+            }
+            else if (info == katja::Info::installing && filters != 1)
+            {
+                job_data->package(katja::Info::available,
+                        reinterpret_cast<const char *>(sqlite3_column_text(stmt, 0)),
+                        reinterpret_cast<const char *>(sqlite3_column_text(stmt, 1)));
+            }
+        }
+        sqlite3_finalize(stmt);
+    }
+    else
+    {
+        std::cerr << sqlite3_errmsg(job_data->db) << std::endl;
+    }
+    sqlite3_free(query);
+    g_free(search);
+}
+
+void pk_backend_search_files(JobData *job_data, char **values)
+{
+    char *search;
+    char *query;
+    sqlite3_stmt *stmt;
+    Info ret;
+
+    search = g_strjoinv("%", values);
+
+    query = sqlite3_mprintf("SELECT (p.name || ';' || p.ver || ';' || p.arch || ';' || r.repo), p.summary, "
+                            "p.full_name FROM filelist AS f NATURAL JOIN pkglist AS p NATURAL JOIN repos AS r "
+                            "WHERE f.filename LIKE '%%%q%%' GROUP BY f.full_name", search);
+
+    if ((sqlite3_prepare_v2(job_data->db, query, -1, &stmt, nullptr) == SQLITE_OK))
+    {
+        /* Now we're ready to output all packages */
+        while (sqlite3_step(stmt) == SQLITE_ROW)
+        {
+            ret = is_installed((char*) sqlite3_column_text(stmt, 2));
+            if ((ret == Info::installed) || (ret == Info::updating))
+            {
+                job_data->package(katja::Info::installed,
+                        (char*) sqlite3_column_text(stmt, 0),
+                        (char*) sqlite3_column_text(stmt, 1));
+            }
+            else if (ret == katja::Info::installing)
+            {
+                job_data->package(katja::Info::available,
+                        (char*) sqlite3_column_text(stmt, 0),
+                        (char*) sqlite3_column_text(stmt, 1));
+            }
+        }
+        sqlite3_finalize(stmt);
+    }
+    else
+    {
+        std::cerr << sqlite3_errmsg(job_data->db) << std::endl;
+    }
+    sqlite3_free(query);
+    g_free(search);
+}
+
+void pk_backend_get_details(JobData *job_data, char **package_ids)
+{
+    char *homepage = nullptr;
+    char** tokens;
+    gsize i;
+    GString *desc;
+    GRegex *expr;
+    GMatchInfo *match_info;
+    GError *err = nullptr;
+    sqlite3_stmt *stmt;
+
+    if ((sqlite3_prepare_v2(job_data->db,
+                            "SELECT p.desc, p.cat, p.uncompressed FROM pkglist AS p NATURAL JOIN repos AS r "
+                            "WHERE name LIKE @name AND r.repo LIKE @repo",
+                            -1,
+                            &stmt,
+                            nullptr) != SQLITE_OK)) {
+        std::cerr << sqlite3_errmsg(job_data->db) << std::endl;
+        goto out;
+    }
+
+    tokens = g_strsplit(package_ids[0], ";", 4);
+    sqlite3_bind_text(stmt, 1, tokens[0], -1, SQLITE_TRANSIENT);
+    sqlite3_bind_text(stmt, 2, tokens[3], -1, SQLITE_TRANSIENT);
+    g_strfreev(tokens);
+
+    if (sqlite3_step(stmt) != SQLITE_ROW)
+    {
+        goto out;
+    }
+    desc = g_string_new((char *) sqlite3_column_text(stmt, 0));
+
+    /* Regular expression for searching a homepage */
+    expr = g_regex_new("(?:http|ftp):\\/\\/[[:word:]\\/\\-\\.]+[[:word:]\\/](?=\\.?$)",
+            (GRegexCompileFlags)(G_REGEX_OPTIMIZE | G_REGEX_DUPNAMES),
+            (GRegexMatchFlags)(0),
+            &err);
+    if (err)
+    {
+        std::cerr << err->message << std::endl;
+        g_error_free(err);
+        goto out;
+    }
+    if (g_regex_match(expr, desc->str, (GRegexMatchFlags) 0, &match_info))
+    {
+        homepage = g_match_info_fetch(match_info, 0); /* URL */
+        /* Remove the last sentence with the copied URL */
+        for (i = desc->len - 1; i > 0; i--)
+        {
+            if ((desc->str[i - 1] == '.') && (desc->str[i] == ' '))
+            {
+                g_string_truncate(desc, i);
+                break;
+            }
+        }
+        g_match_info_free(match_info);
+    }
+    g_regex_unref(expr);
+
+    /* Ready */
+    job_data->details(package_ids[0],
+            (char *) sqlite3_column_text(stmt, 1),
+            desc->str,
+            homepage,
+            sqlite3_column_int(stmt, 2));
+
+    g_free(homepage);
+    if (desc)
+    {
+        g_string_free(desc, true);
+    }
+
+out:
+    sqlite3_finalize(stmt);
+}
+
+void pk_backend_resolve(JobData *job_data, char **packages)
+{
+    char **val;
+    sqlite3_stmt *stmt;
+
+    if ((sqlite3_prepare_v2(job_data->db,
+                            "SELECT (p1.name || ';' || p1.ver || ';' || p1.arch || ';' || r.repo), p1.summary, "
+                               "p1.full_name FROM pkglist AS p1 NATURAL JOIN repos AS r "
+                            "WHERE p1.name LIKE @search AND p1.repo_order = "
+                            "(SELECT MIN(p2.repo_order) FROM pkglist AS p2 WHERE p2.name = p1.name GROUP BY p2.name)",
+                            -1,
+                            &stmt,
+                            nullptr) == SQLITE_OK)) {
+        /* Output packages matching each pattern */
+        for (val = packages; *val; val++)
+        {
+            sqlite3_bind_text(stmt, 1, *val, -1, SQLITE_TRANSIENT);
+
+            while (sqlite3_step(stmt) == SQLITE_ROW)
+            {
+                job_data->package(katja::Info::available,
+                        (char *) sqlite3_column_text(stmt, 0),
+                        (char *) sqlite3_column_text(stmt, 1));
+            }
+
+            sqlite3_clear_bindings(stmt);
+            sqlite3_reset(stmt);
+        }
+        sqlite3_finalize(stmt);
+    }
+    else
+    {
+        std::cerr << sqlite3_errmsg(job_data->db) << std::endl;
+    }
+}
+
+void pk_backend_download_packages(JobData *job_data, char **package_ids, const char *directory)
+{
+    char *path, *to_strv[] = {nullptr, nullptr};
+    unsigned i;
+    sqlite3_stmt *stmt;
+
+    if ((sqlite3_prepare_v2(job_data->db,
+                            "SELECT summary, (full_name || '.' || ext) FROM pkglist NATURAL JOIN repos "
+                            "WHERE name LIKE @name AND ver LIKE @ver AND arch LIKE @arch AND repo LIKE @repo",
+                            -1,
+                            &stmt,
+                            nullptr) != SQLITE_OK))
+    {
+        std::cerr << sqlite3_errmsg(job_data->db) << std::endl;
+        goto out;
+    }
+
+    for (i = 0; package_ids[i]; ++i)
+    {
+        char **tokens = g_strsplit(package_ids[i], ";", 4);
+
+        sqlite3_bind_text(stmt, 1, tokens[0], -1, SQLITE_TRANSIENT);
+        sqlite3_bind_text(stmt, 2, tokens[1], -1, SQLITE_TRANSIENT);
+        sqlite3_bind_text(stmt, 3, tokens[2], -1, SQLITE_TRANSIENT);
+        sqlite3_bind_text(stmt, 4, tokens[3], -1, SQLITE_TRANSIENT);
+        if (sqlite3_step(stmt) == SQLITE_ROW)
+        {
+            GSList *repo;
+            if ((repo = g_slist_find_custom(repos, tokens[3], cmp_repo)))
+            {
+                static_cast<Pkgtools *>(repo->data)->download(job_data, directory, tokens[0]);
+                path = g_build_filename(directory, (char *) sqlite3_column_text(stmt, 1), nullptr);
+                to_strv[0] = path;
+                job_data->files(to_strv);
+                g_free(path);
+            }
+        }
+        sqlite3_clear_bindings(stmt);
+        sqlite3_reset(stmt);
+        g_strfreev(tokens);
+    }
+
+out:
+    sqlite3_finalize(stmt);
+}
+
+void pk_backend_install_packages(JobData *job_data, char **package_ids)
+{
+    char *dest_dir_name;
+    unsigned i;
+    gdouble percent_step;
+    GSList *install_list = nullptr, *l;
+    sqlite3_stmt *pkglist_stmt = nullptr, *collection_stmt = nullptr;
+
+    if ((sqlite3_prepare_v2(job_data->db,
+                            "SELECT summary, cat FROM pkglist NATURAL JOIN repos "
+                            "WHERE name LIKE @name AND ver LIKE @ver AND arch LIKE @arch AND repo LIKE @repo",
+                            -1,
+                            &pkglist_stmt,
+                            nullptr) != SQLITE_OK) ||
+        (sqlite3_prepare_v2(job_data->db,
+                           "SELECT (c.collection_pkg || ';' || p.ver || ';' || p.arch || ';' || r.repo), p.summary, "
+                           "p.full_name, p.ext FROM collections AS c "
+                           "JOIN pkglist AS p ON c.collection_pkg = p.name "
+                           "JOIN repos AS r ON p.repo_order = r.repo_order "
+                           "WHERE c.name LIKE @name AND r.repo LIKE @repo",
+                           -1,
+                           &collection_stmt,
+                           nullptr) != SQLITE_OK))
+    {
+        std::cerr << sqlite3_errmsg(job_data->db) << std::endl;
+        goto out;
+    }
+
+    for (i = 0; package_ids[i]; i++)
+    {
+        char **tokens = g_strsplit(package_ids[i], ";", 4);
+        sqlite3_bind_text(pkglist_stmt, 1, tokens[0], -1, SQLITE_TRANSIENT);
+        sqlite3_bind_text(pkglist_stmt, 2, tokens[1], -1, SQLITE_TRANSIENT);
+        sqlite3_bind_text(pkglist_stmt, 3, tokens[2], -1, SQLITE_TRANSIENT);
+        sqlite3_bind_text(pkglist_stmt, 4, tokens[3], -1, SQLITE_TRANSIENT);
+
+        if (sqlite3_step(pkglist_stmt) == SQLITE_ROW)
+        {
+            /* If it isn't a collection */
+            if (g_strcmp0((char *) sqlite3_column_text(pkglist_stmt, 1), "collections"))
+            {
+                install_list = g_slist_append(install_list, g_strdup(package_ids[i]));
+            }
+            else
+            {
+                sqlite3_bind_text(collection_stmt, 1, tokens[0], -1, SQLITE_TRANSIENT);
+                sqlite3_bind_text(collection_stmt, 2, tokens[3], -1, SQLITE_TRANSIENT);
+
+                while (sqlite3_step(collection_stmt) == SQLITE_ROW)
+                {
+                    katja::Info ret = is_installed((char*) sqlite3_column_text(collection_stmt, 2));
+                    if ((ret == Info::installing) || (ret == Info::updating))
+                    {
+                        install_list = g_slist_append(install_list,
+                                                      g_strdup((char *) sqlite3_column_text(collection_stmt, 0)));
+                    }
+                }
+                sqlite3_clear_bindings(collection_stmt);
+                sqlite3_reset(collection_stmt);
+            }
+        }
+
+        sqlite3_clear_bindings(pkglist_stmt);
+        sqlite3_reset(pkglist_stmt);
+        g_strfreev(tokens);
+    }
+
+    if (install_list)
+    {
+        /* / 2 means total percentage for installing and for downloading */
+        percent_step = 100.0 / g_slist_length(install_list) / 2;
+
+        /* Download the packages */
+        dest_dir_name = g_build_filename(LOCALSTATEDIR, "cache", "PackageKit", "downloads", nullptr);
+        for (l = install_list, i = 0; l; l = g_slist_next(l), i++)
+        {
+            char **tokens;
+            GSList *repo;
+
+            job_data->set_percentage(percent_step * i);
+            tokens = g_strsplit((char *)(l->data), ";", 4);
+            repo = g_slist_find_custom(repos, tokens[3], cmp_repo);
+
+            if (repo)
+            {
+                static_cast<Pkgtools *>(repo->data)->download(job_data, dest_dir_name, tokens[0]);
+            }
+            g_strfreev(tokens);
+        }
+        g_free(dest_dir_name);
+
+        /* Install the packages */
+        for (l = install_list; l; l = g_slist_next(l), i++)
+        {
+            char **tokens;
+            GSList *repo;
+
+            job_data->set_percentage(percent_step * i);
+            tokens = g_strsplit((char *)(l->data), ";", 4);
+            repo = g_slist_find_custom(repos, tokens[3], cmp_repo);
+
+            if (repo)
+            {
+                static_cast<Pkgtools *>(repo->data)->install(job_data, tokens[0]);
+            }
+            g_strfreev(tokens);
+        }
+    }
+    g_slist_free_full(install_list, g_free);
+
+out:
+    sqlite3_finalize(pkglist_stmt);
+    sqlite3_finalize(collection_stmt);
+}
+
+void pk_backend_remove_packages(JobData* job_data, char **package_ids)
+{
+    char *cmd_line;
+    unsigned i;
+    gdouble percent_step;
+    GError *err = nullptr;
+ 
+    /* Add percent_step percents per removed package */
+    percent_step = 100.0 / g_strv_length(package_ids);
+    for (i = 0; package_ids[i]; i++)
+    {
+        char **tokens;
+
+        job_data->set_percentage(percent_step * i);
+        tokens = g_strsplit(package_ids[i], ";", 4);
+        cmd_line = g_strconcat("/sbin/removepkg ", tokens[0], nullptr);
+
+        /* Pkgtools return always 0 */
+        g_spawn_command_line_sync(cmd_line, nullptr, nullptr, nullptr, &err);
+
+        g_free(cmd_line);
+        g_strfreev(tokens);
+
+        if (err)
+        {
+            std::cerr << err->message << std::endl;
+            g_error_free(err);
+
+            return;
+        }
+
+        job_data->set_percentage(100);
+    }
+}
+
+void pk_backend_get_updates(JobData *job_data)
+{
+    char *pkg_id, *full_name, *desc;
+    const char *pkg_metadata_filename;
+    GFile *pkg_metadata_dir;
+    GFileEnumerator *pkg_metadata_enumerator;
+    GFileInfo *pkg_metadata_file_info;
+    GError *err = nullptr;
+    sqlite3_stmt *stmt;
+
+    if ((sqlite3_prepare_v2(job_data->db,
+                            "SELECT p1.full_name, p1.name, p1.ver, p1.arch, r.repo, p1.summary, p1.ext "
+                            "FROM pkglist AS p1 NATURAL JOIN repos AS r "
+                            "WHERE p1.name LIKE @name AND p1.repo_order = "
+                            "(SELECT MIN(p2.repo_order) FROM pkglist AS p2 WHERE p2.name = p1.name GROUP BY p2.name)",
+                            -1,
+                            &stmt,
+                            nullptr) != SQLITE_OK))
+    {
+        std::cerr << sqlite3_errmsg(job_data->db) << std::endl;
+        goto out;
+    }
+
+    /* Read the package metadata directory and comprare all installed packages with ones in the cache */
+    pkg_metadata_dir = g_file_new_for_path("/var/log/packages");
+    pkg_metadata_enumerator = g_file_enumerate_children(pkg_metadata_dir, "standard::name",
+                                                         G_FILE_QUERY_INFO_NONE,
+                                                         nullptr,
+                                                         &err);
+    g_object_unref(pkg_metadata_dir);
+    if (err)
+    {
+        std::cerr << "/var/log/packages: " << err->message << std::endl;
+        g_error_free(err);
+        goto out;
+    }
+
+    while ((pkg_metadata_file_info = g_file_enumerator_next_file(pkg_metadata_enumerator, nullptr, nullptr)))
+    {
+        char **tokens;
+
+        pkg_metadata_filename = g_file_info_get_name(pkg_metadata_file_info);
+        tokens = split_package_name(pkg_metadata_filename);
+
+        /* Select the package from the database */
+        sqlite3_bind_text(stmt, 1, tokens[0], -1, SQLITE_TRANSIENT);
+
+        /* If there are more packages with the same name, remember the one from the
+         * repository with the lowest order. */
+        if ((sqlite3_step(stmt) == SQLITE_ROW)
+         || g_slist_find_custom(repos, ((char *) sqlite3_column_text(stmt, 4)), cmp_repo))
+        {
+
+            full_name = g_strdup((char *) sqlite3_column_text(stmt, 0));
+
+            if (g_strcmp0(pkg_metadata_filename, full_name))
+            { /* Update available */
+                pkg_id = g_strjoin(";",
+                        (char *) sqlite3_column_text(stmt, 1),
+                        (char *) sqlite3_column_text(stmt, 2),
+                        (char *) sqlite3_column_text(stmt, 3),
+                        (char *) sqlite3_column_text(stmt, 4),
+                        nullptr);
+                desc = g_strdup((char *) sqlite3_column_text(stmt, 5));
+
+                job_data->package(katja::Info::updating, pkg_id, desc);
+
+                g_free(desc);
+                g_free(pkg_id);
+            }
+            g_free(full_name);
+        }
+
+        sqlite3_clear_bindings(stmt);
+        sqlite3_reset(stmt);
+
+        g_strfreev(tokens);
+        g_object_unref(pkg_metadata_file_info);
+    }
+    g_object_unref(pkg_metadata_enumerator);
+
+out:
+    sqlite3_finalize(stmt);
+}
+
+void pk_backend_update_packages(JobData *job_data, char **package_ids)
+{
+    char *dest_dir_name, *cmd_line;
+    unsigned i;
+
+    /* Download the packages */
+    dest_dir_name = g_build_filename(LOCALSTATEDIR, "cache", "PackageKit", "downloads", nullptr);
+    for (i = 0; package_ids[i]; i++)
+    {
+        char **tokens = g_strsplit(package_ids[i], ";", 4);
+        GSList *repo = g_slist_find_custom(repos, tokens[3], cmp_repo);
+
+        if (repo)
+        {
+            static_cast<Pkgtools *>(repo->data)->download(job_data, dest_dir_name, tokens[0]);
+        }
+        g_strfreev(tokens);
+    }
+    g_free(dest_dir_name);
+
+    /* Install the packages */
+    for (i = 0; package_ids[i]; i++)
+    {
+        char **tokens = g_strsplit(package_ids[i], ";", 4);
+        GSList *repo = g_slist_find_custom(repos, tokens[3], cmp_repo);
+
+        if (repo)
+        {
+            static_cast<Pkgtools *>(repo->data)->install(job_data, tokens[0]);
+        }
+        g_strfreev(tokens);
+    }
+}
+
+void pk_backend_refresh_cache(JobData *job_data, bool force)
+{
+    char *tmp_dir_name, *db_err, *path = nullptr;
+    int ret;
+    GSList *file_list = nullptr;
+    GFile *db_file = nullptr;
+    GFileInfo *file_info = nullptr;
+    GError *err = nullptr;
+    sqlite3_stmt *stmt = nullptr;
+
+    /* Create temporary directory */
+    tmp_dir_name = g_dir_make_tmp("PackageKit.XXXXXX", &err);
+    if (!tmp_dir_name)
+    {
+        std::cerr << err->message << std::endl;
+        g_error_free(err);
+        return;
+    }
+
+    /* Force the complete cache refresh if the read configuration file is newer than the metadata cache */
+    if (!force)
+    {
+        path = g_build_filename(LOCALSTATEDIR, "cache", "PackageKit", "metadata", "metadata.db", nullptr);
+        db_file = g_file_new_for_path(path);
+        file_info = g_file_query_info(db_file, "time::modified-usec", G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS, nullptr, &err);
+        if (err)
+        {
+            std::cerr << path << ": " << err->message;
+            g_error_free(err);
+            goto out;
+        }
+        ret = sqlite3_prepare_v2(job_data->db,
+                                 "SELECT value FROM cache_info WHERE key LIKE 'last_modification'",
+                                 -1,
+                                 &stmt,
+                                 nullptr);
+        if ((ret != SQLITE_OK) || ((ret = sqlite3_step(stmt)) != SQLITE_ROW))
+        {
+            std::cerr << path << ": " << sqlite3_errstr(ret) << std::endl;
+            goto out;
+        }
+        if ((std::uint32_t) sqlite3_column_int(stmt, 0) > g_file_info_get_attribute_uint32(file_info, "time::modified-usec"))
+        {
+            force = true;
+        }
+    }
+    if (force) /* It should empty all tables */
+    {
+        if (sqlite3_exec(job_data->db, "DELETE FROM repos", nullptr, 0, &db_err) != SQLITE_OK)
+        {
+            std::cerr << db_err << std::endl;
+            sqlite3_free(db_err);
+            goto out;
+        }
+    }
+
+    // Get list of files that should be downloaded.
+    for (GSList *l = repos; l; l = g_slist_next(l))
+    {
+        file_list = g_slist_concat(file_list,
+                static_cast<Pkgtools *>(l->data)->collect_cache_info(tmp_dir_name));
+    }
+
+    /* Download repository */
+    for (GSList *l = file_list; l; l = g_slist_next(l))
+    {
+        get_file(&job_data->curl, static_cast<char **>(l->data)[0],
+                static_cast<char **>(l->data)[1]);
+    }
+    g_slist_free_full(file_list, (GDestroyNotify) g_strfreev);
+
+    /* Refresh cache */
+    for (GSList *l = repos; l; l = g_slist_next(l))
+    {
+        static_cast<Pkgtools *>(l->data)->generate_cache(job_data, tmp_dir_name);
+    }
+
+out:
+    sqlite3_finalize(stmt);
+    if (file_info)
+    {
+        g_object_unref(file_info);
+    }
+    if (db_file)
+    {
+        g_object_unref(db_file);
+    }
+    g_free(path);
+
+    std::filesystem::remove_all(tmp_dir_name);
+    g_rmdir(tmp_dir_name);
+    g_free(tmp_dir_name);
+}
+}