Adding phan and phpstan to drone setup

.drone.yml

@@ -43,6 +43,24 @@ steps:
       - npx cypress verify
       - vendor/bin/robo build
       - curl https://joomla.org/latest -L --output joomla.zip
+      - mkdir joomla
+      - cp joomla.zip joomla/joomla.zip
+      - cd joomla
+      - unzip joomla.zip
+
+  - name: phan
+    image: joomlaprojects/docker-images:php8.1-ast
+    depends: [ prepare_system_tests ]
+    failure: ignore
+    commands:
+      - vendor/bin/phan
+
+  - name: phpstan
+    image: joomlaprojects/docker-images:php8.1
+    depends: [ prepare_system_tests ]
+    failure: ignore
+    commands:
+      - vendor/bin/phpstan analyse src
 
   - name: phpmin-system-mysql
     depends_on: [ prepare_system_tests ]
@@ -129,6 +147,6 @@ services:
 
 ---
 kind: signature
-hmac: b2d4dd23da55c06ea35eaa184db5172624d15edfa7cdcf5659cce885cd96242b
+hmac: ff922cc5122bd7d61d07916ebfb543221a02027839b84132c7366516619adfd5
 
 ...

.phan/config.php

@@ -291,7 +291,8 @@ return [
     //       should be added to the `directory_list` as well as
     //       to `exclude_analysis_directory_list`.
     'exclude_analysis_directory_list' => [
-        'tests/joomla'
+        'joomla/administrator/components/com_finder/src/Indexer',
+        'joomla/libraries'
     ],
 
     // Enable this to enable checks of require/include statements referring to valid paths.
@@ -338,7 +339,8 @@ return [
     // your application should be included in this list.
     'directory_list' => [
         'src',
-        'tests/joomla'
+        'joomla/administrator/components/com_finder/src/Indexer',
+        'joomla/libraries'
     ],
 
     // A list of individual files to include in analysis

phpstan.neon

@@ -0,0 +1,11 @@
+includes:
+    - vendor/phpstan/phpstan-deprecation-rules/rules.neon
+parameters:
+  level: 6
+  paths:
+    - src
+  scanDirectories:
+    - joomla/libraries
+    - joomla/administrator/components/com_finder/src/Indexer
+  ignoreErrors:
+  reportUnmatchedIgnoredErrors: false