Extract action state-tracking out of caches.ts

src/setup-gradle.ts

@@ -0,0 +1,45 @@
+import * as core from '@actions/core'
+import * as path from 'path'
+import * as os from 'os'
+import * as caches from './caches'
+
+const GRADLE_SETUP_VAR = 'GRADLE_BUILD_ACTION_SETUP_COMPLETED'
+const GRADLE_USER_HOME = 'GRADLE_USER_HOME'
+
+export async function setup(buildRootDirectory: string): Promise<void> {
+    const gradleUserHome = determineGradleUserHome(buildRootDirectory)
+
+    // Bypass setup on all but first action step in workflow.
+    if (process.env[GRADLE_SETUP_VAR]) {
+        core.info('Gradle setup only performed on first gradle-build-action step in workflow.')
+        return
+    }
+    // Record setup complete: visible to all subsequent actions and prevents duplicate setup
+    core.exportVariable(GRADLE_SETUP_VAR, true)
+    // Record setup complete: visible in post-action, to control action completion
+    core.saveState(GRADLE_SETUP_VAR, true)
+
+    // Save the Gradle User Home for use in the post-action step.
+    core.saveState(GRADLE_USER_HOME, gradleUserHome)
+
+    await caches.restore(gradleUserHome)
+}
+
+export async function complete(): Promise<void> {
+    if (!core.getState(GRADLE_SETUP_VAR)) {
+        core.info('Gradle setup post-action only performed for first gradle-build-action step in workflow.')
+        return
+    }
+
+    const gradleUserHome = core.getState(GRADLE_USER_HOME)
+    await caches.save(gradleUserHome)
+}
+
+function determineGradleUserHome(rootDir: string): string {
+    const customGradleUserHome = process.env['GRADLE_USER_HOME']
+    if (customGradleUserHome) {
+        return path.resolve(rootDir, customGradleUserHome)
+    }
+
+    return path.resolve(os.homedir(), '.gradle')
+}