C++ AptIntf类代码示例

/**
 * pk_backend_refresh_cache_thread:
 */
static void pk_backend_refresh_cache_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    pk_backend_job_set_allow_cancel(job, true);

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init()) {
        g_debug("Failed to create apt cache");
        apt->emitFinished();
        return;
    }
    
    PkBackend *backend = PK_BACKEND(pk_backend_job_get_backend(job));
    if (pk_backend_is_online(backend)) {
        apt->refreshCache();
        
        if (_error->PendingError() == true) {
            show_errors(job, PK_ERROR_ENUM_CANNOT_FETCH_SOURCES, true);
        }
    } else {
        pk_backend_job_error_code(job,
                                  PK_ERROR_ENUM_NO_NETWORK,
                                  "Cannot refresh cache whilst offline");
    }

    apt->emitFinished();
}

static void backend_get_details_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    gchar **package_ids;
    PkRoleEnum role;
    role = pk_backend_job_get_role(job);

    g_variant_get(params, "(^a&s)",
                  &package_ids);

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init()) {
        g_debug ("Failed to create apt cache");
        return;
    }

    if (package_ids == NULL) {
        pk_backend_job_error_code(job,
                                  PK_ERROR_ENUM_PACKAGE_ID_INVALID,
                                  "Invalid package id");
        return;
    }

    pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);
    PkgList pkgs = apt->resolvePackageIds(package_ids);

    if (role == PK_ROLE_ENUM_GET_UPDATE_DETAIL) {
        apt->emitUpdateDetails(pkgs);
    } else {
        apt->emitDetails(pkgs);
    }
}

static void pk_backend_search_files_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    gchar **search;
    PkBitfield filters;
    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));

    g_variant_get(params, "(t^a&s)",
                  &filters,
                  &search);

    pk_backend_job_set_allow_cancel(job, true);

    // as we can only search for installed files lets avoid the opposite
    if (!pk_bitfield_contain(filters, PK_FILTER_ENUM_NOT_INSTALLED)) {
        if (!apt->init()) {
            g_debug("Failed to create apt cache");
            return;
        }

        pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);
        PkgList output;
        output = apt->searchPackageFiles(search);

        // It's faster to emit the packages here rather than in the matching part
        apt->emitPackages(output, filters);
    }
}

/**
 * pk_backend_cancel:
 */
void pk_backend_cancel(PkBackend *backend, PkBackendJob *job)
{
    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (apt) {
        /* try to cancel the thread */
        g_debug ("cancelling transaction");
        apt->cancel();
    }
}

static void backend_get_files_local_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    gchar **files = nullptr;
    g_variant_get(params, "(^a&s)",
                  &files);

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));

    for (int i = 0; i < g_strv_length(files); ++i) {
        apt->emitPackageFilesLocal(files[i]);
    }
}

static void backend_get_files_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    gchar **package_ids;
    gchar *pi;

    g_variant_get(params, "(^a&s)",
                  &package_ids);

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init()) {
        g_debug("Failed to create apt cache");
        apt->emitFinished();
        return;
    }

    if (package_ids == NULL) {
        pk_backend_job_error_code(job,
                                  PK_ERROR_ENUM_PACKAGE_ID_INVALID,
                                  "Invalid package id");
        pk_backend_job_finished(job);
        apt->emitFinished();
        return;
    }

    pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);
    for (uint i = 0; i < g_strv_length(package_ids); ++i) {
        pi = package_ids[i];
        if (pk_package_id_check(pi) == false) {
            pk_backend_job_error_code(job,
                                      PK_ERROR_ENUM_PACKAGE_ID_INVALID,
                                      "%s",
                                      pi);
            apt->emitFinished();
            return;
        }

        const pkgCache::VerIterator &ver = apt->aptCacheFile()->resolvePkgID(pi);
        if (ver.end()) {
            pk_backend_job_error_code(job,
                                      PK_ERROR_ENUM_PACKAGE_NOT_FOUND,
                                      "Couldn't find package %s",
                                      pi);
            apt->emitFinished();
            return;
        }

        apt->emitPackageFiles(pi);
    }

    apt->emitFinished();
}

static void backend_get_updates_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    PkBitfield filters;
    g_variant_get(params, "(t)", &filters);

    pk_backend_job_set_allow_cancel(job, true);

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init()) {
        g_debug("Failed to create apt cache");
        apt->emitFinished();
        return;
    }

    pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);

    PkgList updates;
    PkgList blocked;
    updates = apt->getUpdates(blocked);

    apt->emitUpdates(updates, filters);
    apt->emitPackages(blocked, filters, PK_INFO_ENUM_BLOCKED);

    apt->emitFinished();
}

static void backend_search_package_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    gchar **values;
    PkBitfield filters;
    PkRoleEnum role;
    vector<string> queries;

    g_variant_get(params, "(t^a&s)",
                  &filters,
                  &values);

    if (*values) {
        for (gint i = 0; values[i] != NULL; i++) {
            queries.push_back(values[i]);
        }
    }

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init()) {
        g_debug("Failed to create apt cache");
        return;
    }

    if (_error->PendingError() == true) {
        return;
    }

    pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);
    pk_backend_job_set_percentage(job, PK_BACKEND_PERCENTAGE_INVALID);
    pk_backend_job_set_allow_cancel(job, true);

    PkgList output;
    role = pk_backend_job_get_role(job);
    if (role == PK_ROLE_ENUM_SEARCH_DETAILS) {
        output = apt->searchPackageDetails(queries);
    } else {
        output = apt->searchPackageName(queries);
    }

    // It's faster to emit the packages here than in the matching part
    apt->emitPackages(output, filters);

    pk_backend_job_set_percentage(job, 100);
}

static void backend_get_packages_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    PkBitfield filters;
    g_variant_get(params, "(t)",
                  &filters);
    pk_backend_job_set_allow_cancel(job, true);

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init()) {
        g_debug("Failed to create apt cache");
        return;
    }

    PkgList output;
    output = apt->getPackages();

    // It's faster to emit the packages rather here than in the matching part
    apt->emitPackages(output, filters);
}

static void backend_depends_on_or_requires_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    PkRoleEnum role;
    PkBitfield filters;
    gchar **package_ids;
    gboolean recursive;
    gchar *pi;

    g_variant_get(params, "(t^a&sb)",
                  &filters,
                  &package_ids,
                  &recursive);
    role = pk_backend_job_get_role(job);

    pk_backend_job_set_allow_cancel(job, true);

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init()) {
        g_debug("Failed to create apt cache");
        return;
    }

    pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);
    PkgList output;
    for (uint i = 0; i < g_strv_length(package_ids); ++i) {
        if (apt->cancelled()) {
            break;
        }
        pi = package_ids[i];
        if (pk_package_id_check(pi) == false) {
            pk_backend_job_error_code(job,
                                      PK_ERROR_ENUM_PACKAGE_ID_INVALID,
                                      "%s",
                                      pi);
            return;
        }

        const pkgCache::VerIterator &ver = apt->aptCacheFile()->resolvePkgID(pi);
        if (ver.end()) {
            pk_backend_job_error_code(job,
                                      PK_ERROR_ENUM_PACKAGE_NOT_FOUND,
                                      "Couldn't find package %s",
                                      pi);
            return;
        }

        if (role == PK_ROLE_ENUM_DEPENDS_ON) {
            apt->getDepends(output, ver, recursive);
        } else {
            apt->getRequires(output, ver, recursive);
        }
    }

    // It's faster to emit the packages here than in the matching part
    apt->emitPackages(output, filters);
}

static void pk_backend_resolve_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    gchar **search;
    PkBitfield filters;

    g_variant_get(params, "(t^a&s)",
                  &filters,
                  &search);
    pk_backend_job_set_allow_cancel(job, true);

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init()) {
        g_debug("Failed to create apt cache");
        return;
    }

    PkgList pkgs = apt->resolvePackageIds(search);

    // It's faster to emit the packages here rather than in the matching part
    apt->emitPackages(pkgs, filters);
}

static void backend_what_provides_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    PkBitfield filters;
    const gchar *provides_text;
    gchar **values;
    bool error = false;
    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));

    g_variant_get(params, "(t^a&s)",
                  &filters,
                  &values);

    pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);

    // We can handle libraries, mimetypes and codecs
    if (!apt->init()) {
        g_debug("Failed to create apt cache");
        g_strfreev(values);
        return;
    }

    pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);

    PkgList output;
    apt->providesLibrary(output, values);
    apt->providesCodec(output, values);
    apt->providesMimeType(output, values);

    // It's faster to emit the packages here rather than in the matching part
    apt->emitPackages(output, filters);
}

static void backend_search_groups_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    gchar **search;
    PkBitfield filters;

    g_variant_get(params, "(t^a&s)",
                  &filters,
                  &search);

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init()) {
        g_debug("Failed to create apt cache");
        apt->emitFinished();
        return;
    }

    pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);

    // It's faster to emmit the packages here rather than in the matching part
    PkgList output;
    output = apt->getPackagesFromGroup(search);
    apt->emitPackages(output, filters);

    pk_backend_job_set_percentage(job, 100);

    apt->emitFinished();
}

static void backend_get_details_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    gchar **package_ids = nullptr;
    gchar **files = nullptr;
    PkRoleEnum role;
    role = pk_backend_job_get_role(job);

    if (role == PK_ROLE_ENUM_GET_DETAILS_LOCAL) {
        g_variant_get(params, "(^a&s)",
                      &files);
    } else {
        g_variant_get(params, "(^a&s)",
                      &package_ids);
    }

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init(files)) {
        g_debug ("Failed to create apt cache");
        return;
    }

    pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);
    PkgList pkgs;
    if (role == PK_ROLE_ENUM_GET_DETAILS_LOCAL) {
        pkgs = apt->resolveLocalFiles(files);
    } else {
        pkgs = apt->resolvePackageIds(package_ids);
    }

    if (role == PK_ROLE_ENUM_GET_UPDATE_DETAIL) {
        apt->emitUpdateDetails(pkgs);
    } else {
        apt->emitDetails(pkgs);
    }
}

static void backend_manage_packages_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    // Transaction flags
    PkBitfield transaction_flags = 0;
    gboolean allow_deps = false;
    gboolean autoremove = false;
    bool fileInstall = false;
    gchar **full_paths = NULL;
    gchar **package_ids = NULL;

    // Get the transaction role since this method is called by install/remove/update/repair
    PkRoleEnum role = pk_backend_job_get_role(job);
    if (role == PK_ROLE_ENUM_INSTALL_FILES) {
        g_variant_get(params, "(t^a&s)",
                      &transaction_flags,
                      &full_paths);
        fileInstall = true;
    } else if (role == PK_ROLE_ENUM_REMOVE_PACKAGES) {
        g_variant_get(params, "(t^a&sbb)",
                      &transaction_flags,
                      &package_ids,
                      &allow_deps,
                      &autoremove);
    } else if (role == PK_ROLE_ENUM_INSTALL_PACKAGES) {
        g_variant_get(params, "(t^a&s)",
                      &transaction_flags,
                      &package_ids);
    } else if (role == PK_ROLE_ENUM_UPDATE_PACKAGES) {
        g_variant_get(params, "(t^a&s)",
                      &transaction_flags,
                      &package_ids);
    }

    // Check if we should only simulate the install (calculate dependencies)
    bool simulate;
    simulate = pk_bitfield_contain(transaction_flags, PK_TRANSACTION_FLAG_ENUM_SIMULATE);

    // Check if we should only download all the required packages for this transaction
    bool downloadOnly;
    downloadOnly = pk_bitfield_contain(transaction_flags, PK_TRANSACTION_FLAG_ENUM_ONLY_DOWNLOAD);

    // Check if we should fix broken packages
    bool fixBroken = false;
    if (role == PK_ROLE_ENUM_REPAIR_SYSTEM) {
        // On fix broken mode no package to remove/install is allowed
        fixBroken = true;
    }

    pk_backend_job_set_allow_cancel(job, true);

    AptIntf *apt = static_cast<AptIntf*>(pk_backend_job_get_user_data(job));
    if (!apt->init(full_paths)) {
        g_debug("Failed to create apt cache");
        return;
    }

    pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);
    PkgList installPkgs, removePkgs, updatePkgs;

    if (!fixBroken) {
        // Resolve the given packages
        if (role == PK_ROLE_ENUM_REMOVE_PACKAGES) {
            removePkgs = apt->resolvePackageIds(package_ids);
        } else if (role == PK_ROLE_ENUM_INSTALL_PACKAGES) {
            installPkgs = apt->resolvePackageIds(package_ids);
        } else if (role == PK_ROLE_ENUM_UPDATE_PACKAGES) {
            updatePkgs = apt->resolvePackageIds(package_ids);
        } else if (role == PK_ROLE_ENUM_INSTALL_FILES) {
            installPkgs = apt->resolveLocalFiles(full_paths);
        } else {
            pk_backend_job_error_code(job,
                                      PK_ERROR_ENUM_PACKAGE_NOT_FOUND,
                                      "Could not figure out what to do to apply the change.");
            return;
        }

        if (removePkgs.size() == 0 && installPkgs.size() == 0 && updatePkgs.size() == 0) {
            pk_backend_job_error_code(job,
                                      PK_ERROR_ENUM_PACKAGE_NOT_FOUND,
                                      "Could not find package(s)");
            return;
        }
    }

    // Install/Update/Remove packages, or just simulate
    bool ret = apt->runTransaction(installPkgs,
                                   removePkgs,
                                   updatePkgs,
                                   fixBroken,
                                   transaction_flags,
                                   autoremove);
    if (!ret) {
        // Print transaction errors
        g_debug("AptIntf::runTransaction() failed: %i", _error->PendingError());
        return;
    }
}