Fix that files passed via CLI but are not in projectFiles reported on…

…ly a limited, random selection of errors instead of all - treat all files passed as CLI args as if they were in projectFiles

src/Psalm/Config.php

@@ -21,6 +21,7 @@
 use Psalm\Internal\Analyzer\ClassLikeAnalyzer;
 use Psalm\Internal\Analyzer\FileAnalyzer;
 use Psalm\Internal\Analyzer\ProjectAnalyzer;
+use Psalm\Internal\CliUtils;
 use Psalm\Internal\Composer;
 use Psalm\Internal\EventDispatcher;
 use Psalm\Internal\IncludeCollector;
@@ -1298,6 +1299,41 @@ private static function fromXmlAndPaths(
             $config->project_files = ProjectFileFilter::loadFromXMLElement($config_xml->projectFiles, $base_dir, true);
         }
 
+        // any paths passed via CLI should be added to the projectFiles
+        // as they're getting analyzed like if they are part of the project
+        // ProjectAnalyzer::getInstance()->check_paths_files is not populated at this point in time
+        $paths_to_check = CliUtils::getPathsToCheck(null);
+        if ($paths_to_check !== null) {
+            $paths_to_add_to_project_files = array();
+            foreach ($paths_to_check as $path) {
+                if ($config->isInProjectDirs($path)) {
+                    continue;
+                }
+
+                $paths_to_add_to_project_files[] = $path;
+            }
+
+            if ($paths_to_add_to_project_files !== array() && !isset($config_xml->projectFiles)) {
+                if ($config_xml === null) {
+                    $config_xml = new SimpleXMLElement('<psalm/>');
+                }
+                $config_xml->addChild('projectFiles');
+            }
+
+            if ($paths_to_add_to_project_files !== array()) {
+                foreach ($paths_to_add_to_project_files as $path) {
+                    $child = $config_xml->projectFiles->addChild('file');
+                    $child->addAttribute('name', $path);
+                }
+
+                $config->project_files = ProjectFileFilter::loadFromXMLElement(
+                    $config_xml->projectFiles,
+                    $base_dir,
+                    true,
+                );
+            }
+        }
+
         if (isset($config_xml->extraFiles)) {
             $config->extra_files = ProjectFileFilter::loadFromXMLElement($config_xml->extraFiles, $base_dir, true);
         }