Add extraOptions input

action.yml

@@ -90,6 +90,13 @@ inputs:
       executions on multiple os of this action.
     required: false
     default: 'true'
+  extraOptions:
+    description: >-
+      String of additional command line options to pass to the pmd execution.
+      For instance, as there is no native interface to use-version, this
+      option could be set to `--use-version=java-21`.
+    required: false
+    default: ''
 outputs:
   violations:
     description: Number of violations found

src/util.ts

@@ -101,6 +101,8 @@ async function executePmd(
     pmdExecutable += ' check --no-progress'
   }
 
+  pmdExecutable += ' ' + core.getInput('extraOptions', { required: false })
+
   let sourceParameter: string[]
   if (Array.isArray(fileListOrSourcePath)) {
     await writeFileList(fileListOrSourcePath)

tsconfig.json

@@ -5,7 +5,7 @@
     "module": "NodeNext",
     "rootDir": "./src",
     "moduleResolution": "NodeNext",
-    "baseUrl": "./",
+    "paths": {"*": ["./*"]},
     "sourceMap": true,
     "outDir": "./dist",
     "noImplicitAny": true,