Use current matrix values for workflow job context

action.yml

@@ -24,6 +24,10 @@ inputs:
     description: Whether caching of Gradle User Home and project .gradle directory is enabled. Valid values are 'true' (default), 'false', and 'read-only'.
     required: false
     default: true
+  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.
+    required: false
+    default: ${{ toJSON(matrix) }}
 
 outputs:
   build-scan-url:

src/cache-utils.ts

@@ -51,16 +51,9 @@ function generateCacheKey(cacheName: string): CacheKey {
 }
 
 function determineJobContext(): string {
-    // Ideally we'd serialize the entire matrix values here, but matrix is not available within the action invocation.
-    // Use the JAVA_HOME value as a proxy for the java version
-    const javaHome = process.env['JAVA_HOME'] || ''
-
-    // Approximate overall context based on the first gradle invocation in the Job
-    const args = core.getInput('arguments')
-    const buildRootDirectory = core.getInput('build-root-directory')
-    const gradleVersion = core.getInput('gradle-version')
-
-    return hashStrings([javaHome, args, buildRootDirectory, gradleVersion])
+    // By default, we hash the full `matrix` data for the run, to uniquely identify this job invocation
+    const workflowJobContext = core.getInput('workflow-job-context')
+    return hashStrings([workflowJobContext])
 }
 
 export function hashStrings(values: string[]): string {

src/main.ts

@@ -16,6 +16,7 @@ export async function run(): Promise<void> {
 
     try {
         const args: string[] = parseCommandLineArguments()
+        // TODO: instead of running with no-daemon, run `--stop` in post action.
         args.push('--no-daemon')
 
         const result = await execution.execute(