C++ AptIntf::cancelled方法代码示例

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);
}

//.........这里部分代码省略.........
                      &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;
    }

    g_debug("FILE INSTALL: %i", fileInstall);
    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 installPkgs, removePkgs;

    if (fileInstall) {
        // File installation EXPERIMENTAL

        // GDebi can not install more than one package at time
        if (g_strv_length(full_paths) > 1) {
            pk_backend_job_error_code(job,
                                      PK_ERROR_ENUM_NOT_SUPPORTED,
                                      "The backend can only process one file at time.");
            return;
        }

        // get the list of packages to install
        if (!apt->markFileForInstall(full_paths[0], installPkgs, removePkgs)) {
            return;
        }

        cout << "installPkgs.size: " << installPkgs.size() << endl;
        cout << "removePkgs.size: " << removePkgs.size() << endl;

    } else if (!fixBroken) {
        // Resolve the given packages
        if (role == PK_ROLE_ENUM_REMOVE_PACKAGES) {
            removePkgs = apt->resolvePackageIds(package_ids);
        } else {
            installPkgs = apt->resolvePackageIds(package_ids);
        }

        if (removePkgs.size() == 0 && installPkgs.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;
    ret = apt->runTransaction(installPkgs,
                              removePkgs,
                              fileInstall, // Mark newly installed packages as auto-installed
                              // (they're dependencies of the new local package)
                              fixBroken,
                              transaction_flags,
                              autoremove);
    if (!ret) {
        // Print transaction errors
        g_debug("AptIntf::runTransaction() failed: %i", _error->PendingError());
        return;
    }

    if (fileInstall) {
        // Now perform the installation!
        gchar *path;
        for (uint i = 0; i < g_strv_length(full_paths); ++i) {
            if (apt->cancelled()) {
                break;
            }

            path = full_paths[i];
            if (!apt->installFile(path, simulate)) {
                cout << "Installation of DEB file " << path << " failed." << endl;
                return;
            }
        }
    }
}

/**
 * pk_backend_download_packages_thread:
 */
static void pk_backend_download_packages_thread(PkBackendJob *job, GVariant *params, gpointer user_data)
{
    gchar **package_ids;
    const gchar *tmpDir;
    string directory;

    g_variant_get(params, "(^a&ss)",
                  &package_ids,
                  &tmpDir);
    directory = _config->FindDir("Dir::Cache::archives");
    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;
    }

    PkBackend *backend = PK_BACKEND(pk_backend_job_get_backend(job));
    if (pk_backend_is_online(backend)) {
        pk_backend_job_set_status(job, PK_STATUS_ENUM_QUERY);
        // Create the progress
        AcqPackageKitStatus Stat(apt, job);

        // get a fetcher
        pkgAcquire fetcher(&Stat);
        gchar *pi;

        // TODO this might be useful when the item is in the cache
        // 	for (pkgAcquire::ItemIterator I = fetcher.ItemsBegin(); I < fetcher.ItemsEnd();)
        // 	{
        // 		if ((*I)->Local == true)
        // 		{
        // 			I++;
        // 			continue;
        // 		}
        //
        // 		// Close the item and check if it was found in cache
        // 		(*I)->Finished();
        // 		if ((*I)->Complete == false) {
        // 			Transient = true;
        // 		}
        //
        // 		// Clear it out of the fetch list
        // 		delete *I;
        // 		I = fetcher.ItemsBegin();
        // 	}

        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);
                return;
            }

            if (apt->cancelled()) {
                break;
            }

            const pkgCache::VerIterator &ver = apt->aptCacheFile()->resolvePkgID(pi);
            // Ignore packages that could not be found or that exist only due to dependencies.
            if (ver.end()) {
                _error->Error("Can't find this package id \"%s\".", pi);
                continue;
            } else {
                if(!ver.Downloadable()) {
                    _error->Error("No downloadable files for %s,"
                                  "perhaps it is a local or obsolete" "package?",
                                  pi);
                    continue;
                }

                string storeFileName;
                if (!apt->getArchive(&fetcher,
                                     ver,
                                     directory,
                                     storeFileName)) {
                    return;
                }

                gchar **files = (gchar **) g_malloc(2 * sizeof(gchar *));
                files[0] = g_strdup_printf("%s/%s", directory.c_str(), flNotDir(storeFileName).c_str());
                files[1] = NULL;
                pk_backend_job_files(job, pi, files);
                g_strfreev(files);
            }
        }

        if (fetcher.Run() != pkgAcquire::Continue
                && apt->cancelled() == false) {
            // We failed and we did not cancel
            show_errors(job, PK_ERROR_ENUM_PACKAGE_DOWNLOAD_FAILED);
            return;
        }
//.........这里部分代码省略.........