Allow users to disable caching full files

src/Psalm/Internal/Provider/ParserCacheProvider.php

@@ -55,12 +55,18 @@ class ParserCacheProvider
      */
     private $new_file_content_hashes = [];
 
+    /**
+     * @var bool
+     */
+    private $use_file_cache;
+
     /** @var bool */
     private $use_igbinary;
 
-    public function __construct(Config $config)
+    public function __construct(Config $config, bool $use_file_cache = true)
     {
         $this->use_igbinary = $config->use_igbinary;
+        $this->use_file_cache = $use_file_cache;
     }
 
     /**
@@ -148,6 +154,10 @@ class ParserCacheProvider
      */
     public function loadExistingFileContentsFromCache($file_path)
     {
+        if (!$this->use_file_cache) {
+            return null;
+        }
+
         $root_cache_directory = Config::getInstance()->getCacheDirectory();
 
         if (!$root_cache_directory) {
@@ -298,6 +308,10 @@ class ParserCacheProvider
      */
     public function cacheFileContents($file_path, $file_contents)
     {
+        if (!$this->use_file_cache) {
+            return;
+        }
+
         $root_cache_directory = Config::getInstance()->getCacheDirectory();
 
         if (!$root_cache_directory) {

src/command_functions.php

@@ -369,6 +369,10 @@ Caching:
         Runs Psalm without using cached representations of unchanged classes and files.
         Useful if you want the afterClassLikeVisit plugin hook to run every time you visit a file.
 
+    --no-file-cache
+        Runs Psalm without using caching every single file for later diffing.
+        This reduces the space Psalm uses on disk and file I/O.
+
 Miscellaneous:
     -h, --help
         Display this help message

src/psalm-refactor.php

@@ -240,7 +240,7 @@ $threads = isset($options['threads'])
 
 $providers = new Psalm\Internal\Provider\Providers(
     new Psalm\Internal\Provider\FileProvider(),
-    new Psalm\Internal\Provider\ParserCacheProvider($config),
+    new Psalm\Internal\Provider\ParserCacheProvider($config, false),
     new Psalm\Internal\Provider\FileStorageCacheProvider($config),
     new Psalm\Internal\Provider\ClassLikeStorageCacheProvider($config)
 );

src/psalm.php

@@ -43,6 +43,7 @@ $valid_long_options = [
     'monochrome',
     'no-cache',
     'no-reflection-cache',
+    'no-file-cache',
     'output-format:',
     'plugin:',
     'report:',
@@ -487,6 +488,7 @@ if (isset($options['no-cache']) || isset($options['i'])) {
     );
 } else {
     $no_reflection_cache = isset($options['no-reflection-cache']);
+    $no_file_cache = isset($options['no-file-cache']);
 
     $file_storage_cache_provider = $no_reflection_cache
         ? null
@@ -498,7 +500,7 @@ if (isset($options['no-cache']) || isset($options['i'])) {
 
     $providers = new Provider\Providers(
         new Provider\FileProvider,
-        new Provider\ParserCacheProvider($config),
+        new Provider\ParserCacheProvider($config, !$no_file_cache),
         $file_storage_cache_provider,
         $classlike_storage_cache_provider,
         new Provider\FileReferenceCacheProvider($config)

src/psalter.php

@@ -210,7 +210,7 @@ if (isset($options['no-cache'])) {
 } else {
     $providers = new Psalm\Internal\Provider\Providers(
         new Psalm\Internal\Provider\FileProvider(),
-        new Psalm\Internal\Provider\ParserCacheProvider($config),
+        new Psalm\Internal\Provider\ParserCacheProvider($config, false),
         new Psalm\Internal\Provider\FileStorageCacheProvider($config),
         new Psalm\Internal\Provider\ClassLikeStorageCacheProvider($config)
     );