add psalm check

checks/phpstan.nix

@@ -0,0 +1,31 @@
+{
+  composerMeta,
+  src,
+  phpstan,
+  vendor,
+  stdenvNoCC,
+}: let
+  inherit (composerMeta) version name;
+in
+  stdenvNoCC.mkDerivation {
+    inherit src version;
+    pname = "${name}-phpstan";
+
+    nativeBuildInputs = [phpstan];
+
+    postPatch = ''
+      ln -s ${vendor}/vendor vendor
+    '';
+
+    buildPhase = ''
+      runHook preBuild
+
+      phpstan analyse
+
+      runHook postBuild
+    '';
+
+    installPhase = ''
+      touch $out
+    '';
+  }

flakelight-php.nix

@@ -40,6 +40,7 @@
     })
     composerJson;
   hasPsalm = pathExists config.psalmConfig;
+  hasPhpStan = pathExists config.phpStanConfig;
   hasPhpCsFixer = pathExists config.phpCsFixerConfig;
   buildPhpVersion = pkgs: version:
     (phpVersions.${version} pkgs).buildEnv {
@@ -70,6 +71,10 @@ in
         type = with types; path;
         default = src + /psalm.xml;
       };
+      phpStanConfig = mkOption {
+        type = with types; path;
+        default = src + /phpstan.neon;
+      };
       phpCsFixerConfig = mkOption {
         type = with types; path;
         default = src + /.php-cs-fixer.dist.php;
@@ -87,7 +92,7 @@ in
             || file.hasExt "stub"
             || file.hasExt "phpstub"
             || match "snapshot__.*\.snap" file.name != null
-            || elem file.name [".php-cs-fixer.dist.php" "psalm.xml" "package.json" "package.lock"])
+            || elem file.name [".php-cs-fixer.dist.php" "psalm.xml" "package.json" "package.lock" "phpstan.neon"])
           src;
       };
       phpExtensions = mkOption {
@@ -116,7 +121,7 @@ in
             };
 
             inherit composerMeta filteredSrc;
-            inherit (final.minPhp.packages) php-cs-fixer composer psalm;
+            inherit (final.minPhp.packages) php-cs-fixer composer psalm phpstan;
           })
         ];
 
@@ -136,17 +141,23 @@ in
           vendor = pkgs: pkgs.vendor;
         };
 
-        checks = {pkgs, ...}: (optionalAttrs hasPsalm {
+        checks = {pkgs, ...}:
+          (optionalAttrs hasPsalm {
             psalm = pkgs.callPackage ./checks/psalm.nix {
               src = filteredSrc;
             };
+          })
+          // (optionalAttrs hasPhpStan {
+            phpstan = pkgs.callPackage ./checks/phpstan.nix {
+              src = filteredSrc;
+            };
           });
       })
 
       {
         devShells = {
           default = {
-            packages = pkgs: (config.tools pkgs) ++ (with pkgs; [minPhp php-cs-fixer composer psalm]);
+            packages = pkgs: (config.tools pkgs) ++ (with pkgs; [minPhp php-cs-fixer composer psalm phpstan]);
           };
         };