protected static function install_test_process(&$test_install_request, $no_prompts)
 {
     // Install a test
     $identifier = $test_install_request->test_profile->get_identifier();
     $test_install_directory = $test_install_request->test_profile->get_install_dir();
     pts_file_io::mkdir(dirname($test_install_directory));
     pts_file_io::mkdir($test_install_directory);
     $installed = false;
     if (ceil(disk_free_space($test_install_directory) / 1048576) < $test_install_request->test_profile->get_download_size() + 128) {
         self::test_install_error(null, $test_install_request, 'There is not enough space at ' . $test_install_directory . ' for the test files.');
     } else {
         if (ceil(disk_free_space($test_install_directory) / 1048576) < $test_install_request->test_profile->get_environment_size(false) + 128) {
             self::test_install_error(null, $test_install_request, 'There is not enough space at ' . $test_install_directory . ' for this test.');
         } else {
             pts_test_installer::setup_test_install_directory($test_install_request, true);
             // Download test files
             $download_test_files = pts_test_installer::download_test_files($test_install_request, false, $no_prompts);
             if ($download_test_files == false) {
                 self::test_install_error(null, $test_install_request, 'Downloading of needed test files failed.');
                 return false;
             }
             if ($test_install_request->test_profile->get_file_installer() != false) {
                 self::create_compiler_mask($test_install_request);
                 pts_module_manager::module_process('__pre_test_install', $identifier);
                 pts_client::$display->test_install_begin($test_install_request);
                 $pre_install_message = $test_install_request->test_profile->get_pre_install_message();
                 $post_install_message = $test_install_request->test_profile->get_post_install_message();
                 $install_agreement = $test_install_request->test_profile->get_installation_agreement_message();
                 if (!empty($install_agreement)) {
                     if (pts_strings::is_url($install_agreement)) {
                         $install_agreement = pts_network::http_get_contents($install_agreement);
                         if (empty($install_agreement)) {
                             self::test_install_error(null, $test_install_request, 'The user agreement could not be found. Test installation aborted.');
                             return false;
                         }
                     }
                     echo $install_agreement . PHP_EOL;
                     if (!$no_prompts) {
                         $user_agrees = pts_user_io::prompt_bool_input('Do you agree to these terms', false, 'INSTALL_AGREEMENT');
                         if (!$user_agrees) {
                             self::test_install_error(null, $test_install_request, 'User agreement failed; this test will not be installed.');
                             return false;
                         }
                     }
                 }
                 pts_client::$display->display_interrupt_message($pre_install_message);
                 $install_time_length_start = microtime(true);
                 $install_log = pts_tests::call_test_script($test_install_request->test_profile, 'install', null, $test_install_directory, $test_install_request->special_environment_vars, false);
                 $test_install_request->install_time_duration = ceil(microtime(true) - $install_time_length_start);
                 pts_client::$display->display_interrupt_message($post_install_message);
                 if (!empty($install_log)) {
                     file_put_contents($test_install_directory . 'install.log', $install_log);
                     pts_file_io::unlink($test_install_directory . 'install-failed.log');
                     pts_client::$display->test_install_output($install_log);
                 }
                 if (is_file($test_install_directory . 'install-exit-status')) {
                     // If the installer writes its exit status to ~/install-exit-status, if it's non-zero the install failed
                     $install_exit_status = pts_file_io::file_get_contents($test_install_directory . 'install-exit-status');
                     unlink($test_install_directory . 'install-exit-status');
                     if ($install_exit_status != 0 && phodevi::is_windows() == false) {
                         $install_error = null;
                         // TODO: perhaps better way to handle this than to remove pts-install.xml
                         pts_file_io::unlink($test_install_directory . 'pts-install.xml');
                         if (is_file($test_install_directory . 'install.log')) {
                             $install_log = pts_file_io::file_get_contents($test_install_directory . 'install.log');
                             $install_error = pts_tests::scan_for_error($install_log, $test_install_directory);
                             copy($test_install_directory . 'install.log', $test_install_directory . 'install-failed.log');
                         }
                         //pts_test_installer::setup_test_install_directory($test_install_request, true); // Remove installed files from the bunked installation
                         self::test_install_error(null, $test_install_request, 'The installer exited with a non-zero exit status.');
                         if ($install_error != null) {
                             $test_install_request->install_error = pts_tests::pretty_error_string($install_error);
                             if ($test_install_request->install_error != null) {
                                 self::test_install_error(null, $test_install_request, 'ERROR: ' . $test_install_request->install_error);
                             }
                         }
                         pts_client::$display->test_install_error('LOG: ' . str_replace(pts_core::user_home_directory(), '~/', $test_install_directory) . 'install-failed.log' . PHP_EOL);
                         if (pts_client::do_anonymous_usage_reporting()) {
                             // If anonymous usage reporting enabled, report test install failure to OpenBenchmarking.org
                             pts_openbenchmarking_client::upload_usage_data('test_install_failure', array($test_install_request, $install_error));
                         }
                         return false;
                     }
                 }
                 pts_module_manager::module_process('__post_test_install', $identifier);
                 $installed = true;
                 if (pts_config::read_bool_config('PhoronixTestSuite/Options/Installation/RemoveDownloadFiles', 'FALSE')) {
                     // Remove original downloaded files
                     foreach ($test_install_request->get_download_objects() as $download_object) {
                         pts_file_io::unlink($test_install_directory . $download_object->get_filename());
                     }
                 }
             } else {
                 pts_client::$display->test_install_error('No installation script found.');
                 $installed = true;
             }
             // Additional validation checks?
             $custom_validated_output = pts_tests::call_test_script($test_install_request->test_profile, 'validate-install', PHP_EOL . 'Validating Installation...' . PHP_EOL, $test_install_directory, null, false);
             if (!empty($custom_validated_output) && !pts_strings::string_bool($custom_validated_output)) {
                 $installed = false;
             }
         }
     }
     echo PHP_EOL;
     return $installed;
 }
 public static function download_cache_locations()
 {
     static $cache_directories = null;
     if ($cache_directories == null) {
         $cache_directories = array();
         // Phoronix Test Suite System Cache Directories
         $additional_dir_checks = array('/var/cache/phoronix-test-suite/download-cache/', '/var/cache/phoronix-test-suite/');
         foreach ($additional_dir_checks as $dir_check) {
             if (is_dir($dir_check)) {
                 $cache_directories[] = $dir_check;
                 break;
             }
         }
         // User Defined Directory Checking
         $dir_string = ($dir = pts_client::read_env('PTS_DOWNLOAD_CACHE')) != false ? $dir : null;
         foreach (array_merge(self::$extra_caches, pts_strings::colon_explode($dir_string)) as $dir_check) {
             if ($dir_check == null) {
                 continue;
             }
             $dir_check = pts_strings::parse_for_home_directory($dir_check);
             if (pts_strings::is_url($dir_check) == false && !is_dir($dir_check)) {
                 continue;
             }
             $cache_directories[] = pts_strings::add_trailing_slash($dir_check);
         }
         if (pts_config::read_bool_config('PhoronixTestSuite/Options/Installation/SearchMediaForCache', 'TRUE')) {
             $download_cache_dirs = array_merge(pts_file_io::glob('/media/*/download-cache/'), pts_file_io::glob('/media/*/*/download-cache/'), pts_file_io::glob('/run/media/*/*/download-cache/'), pts_file_io::glob('/Volumes/*/download-cache/'));
             foreach ($download_cache_dirs as $dir) {
                 $cache_directories[] = $dir;
             }
         }
     }
     return $cache_directories;
 }