Allow cache-paths to be set via action config

action.yml

@@ -26,12 +26,22 @@ inputs:
     # TODO: It might be useful to default to read-only for PRs, or non-main branch.
     default: false 
   
+
+  # EXPERIMENTAL & INTERNAL CONFIGURATION PROPERTIES
+  # The following action properties allow fine-grained tweaking of the action caching behaviour.
+  # These properties are not designed for production use, and may change without notice in a subsequent release of `gradle-build-action`.
+  # Use at your own risk!
   workflow-job-context:
-    description: Used to uniquely identify the current job invocation. Defaults to the matrix values for this job; this should not be overridden by users.
+    description: Used to uniquely identify the current job invocation. Defaults to the matrix values for this job; this should not be overridden by users (INTERNAL).
     required: false
     default: ${{ toJSON(matrix) }}
+  cache-paths:
+    description: Paths in Gradle User Home to cache. (EXPERIMENTAL - may be changed/removed without notice)
+    required: false
+    default: |
+        ["caches", "notifications"]
   cache-artifact-bundles:
-    description: Names and patterns of artifact bundles to cache separately. For internal use only.
+    description: Names and patterns of artifact bundles to cache separately. (EXPERIMENTAL - may be changed/removed without notice)
     required: false
     default: |
         [

src/cache-gradle-user-home.ts

@@ -12,9 +12,6 @@ import {
     tryDelete
 } from './cache-utils'
 
-// Which paths under Gradle User Home should be cached
-const CACHE_PATH = ['caches', 'notifications']
-
 export class GradleUserHomeCache extends AbstractCache {
     private gradleUserHome: string
 
@@ -170,7 +167,21 @@ export class GradleUserHomeCache extends AbstractCache {
     }
 
     protected getCachePath(): string[] {
-        return CACHE_PATH.map(x => path.resolve(this.gradleUserHome, x))
+        const rawPaths: string[] = JSON.parse(core.getInput('cache-paths'))
+        rawPaths.push(META_FILE_DIR)
+        const resolvedPaths = rawPaths.map(x => this.resolveCachePath(x))
+        this.debug(`Using cache paths: ${resolvedPaths}`)
+        return resolvedPaths
+    }
+
+    private resolveCachePath(rawPath: string): string {
+        if (rawPath.startsWith('!')) {
+            const resolved = this.resolveCachePath(rawPath.substring(1))
+            const negated = `!${resolved}`
+            this.debug(`Negate cache path: ${negated}`)
+            return negated
+        }
+        return path.resolve(this.gradleUserHome, rawPath)
     }
 
     private getArtifactBundles(): Map<string, string> {