Avoid windows shutdown bug

sources/src/actions/dependency-submission/main.ts

@@ -15,6 +15,7 @@ import {
 } from '../../configuration'
 import {saveDeprecationState} from '../../deprecation-collector'
 import {handleMainActionError} from '../../errors'
+import {forceExit} from '../../force-exit'
 
 /**
  * The main entry point for the action, called by Github Actions for the step.
@@ -67,7 +68,7 @@ export async function run(): Promise<void> {
     }
 
     // Explicit process.exit() to prevent waiting for hanging promises.
-    process.exit()
+    await forceExit()
 }
 
 run()

sources/src/actions/dependency-submission/post.ts

@@ -2,6 +2,7 @@ import * as setupGradle from '../../setup-gradle'
 
 import {CacheConfig, SummaryConfig} from '../../configuration'
 import {handlePostActionError} from '../../errors'
+import {forceExit} from '../../force-exit'
 
 // Catch and log any unhandled exceptions.  These exceptions can leak out of the uploadChunk method in
 // @actions/toolkit when a failed upload closes the file descriptor causing any in-process reads to
@@ -19,7 +20,7 @@ export async function run(): Promise<void> {
     }
 
     // Explicit process.exit() to prevent waiting for promises left hanging by `@actions/cache` on save.
-    process.exit()
+    await forceExit()
 }
 
 run()

sources/src/actions/setup-gradle/main.ts

@@ -12,6 +12,7 @@ import {
 } from '../../configuration'
 import {failOnUseOfRemovedFeature, saveDeprecationState} from '../../deprecation-collector'
 import {handleMainActionError} from '../../errors'
+import {forceExit} from '../../force-exit'
 
 /**
  * The main entry point for the action, called by Github Actions for the step.
@@ -42,7 +43,7 @@ export async function run(): Promise<void> {
     }
 
     // Explicit process.exit() to prevent waiting for hanging promises.
-    process.exit()
+    await forceExit()
 }
 
 run()

sources/src/actions/setup-gradle/post.ts

@@ -4,6 +4,7 @@ import * as dependencyGraph from '../../dependency-graph'
 import {CacheConfig, DependencyGraphConfig, SummaryConfig} from '../../configuration'
 import {handlePostActionError} from '../../errors'
 import {emitDeprecationWarnings, restoreDeprecationState} from '../../deprecation-collector'
+import {forceExit} from '../../force-exit'
 
 // Catch and log any unhandled exceptions.  These exceptions can leak out of the uploadChunk method in
 // @actions/toolkit when a failed upload closes the file descriptor causing any in-process reads to
@@ -27,7 +28,7 @@ export async function run(): Promise<void> {
     }
 
     // Explicit process.exit() to prevent waiting for promises left hanging by `@actions/cache` on save.
-    process.exit()
+    await forceExit()
 }
 
 run()

sources/src/force-exit.ts

@@ -0,0 +1,14 @@
+const WINDOWS_EXIT_DELAY_MS = 50
+
+export function getForcedExitDelayMs(platform: NodeJS.Platform = process.platform): number {
+    return platform === 'win32' ? WINDOWS_EXIT_DELAY_MS : 0
+}
+
+export async function forceExit(platform: NodeJS.Platform = process.platform): Promise<never> {
+    const exitDelayMs = getForcedExitDelayMs(platform)
+    if (exitDelayMs > 0) {
+        await new Promise(resolve => setTimeout(resolve, exitDelayMs))
+    }
+
+    return process.exit()
+}

sources/test/jest/force-exit.test.ts

@@ -0,0 +1,39 @@
+import {afterEach, describe, expect, it, jest} from '@jest/globals'
+
+import {forceExit, getForcedExitDelayMs} from '../../src/force-exit'
+
+describe('forceExit', () => {
+    afterEach(() => {
+        jest.restoreAllMocks()
+        jest.useRealTimers()
+    })
+
+    it('adds a short delay on Windows before exiting', async () => {
+        jest.useFakeTimers()
+
+        const exitSpy = jest.spyOn(process, 'exit').mockImplementation((() => undefined) as never)
+
+        const exitPromise = forceExit('win32')
+        await jest.advanceTimersByTimeAsync(49)
+
+        expect(exitSpy).not.toHaveBeenCalled()
+
+        await jest.advanceTimersByTimeAsync(1)
+        await expect(exitPromise).resolves.toBeUndefined()
+
+        expect(exitSpy).toHaveBeenCalledTimes(1)
+    })
+
+    it('exits immediately on non-Windows platforms', async () => {
+        const exitSpy = jest.spyOn(process, 'exit').mockImplementation((() => undefined) as never)
+
+        await expect(forceExit('linux')).resolves.toBeUndefined()
+        expect(exitSpy).toHaveBeenCalledTimes(1)
+    })
+
+    it('only delays on Windows', () => {
+        expect(getForcedExitDelayMs('win32')).toBe(50)
+        expect(getForcedExitDelayMs('linux')).toBe(0)
+        expect(getForcedExitDelayMs('darwin')).toBe(0)
+    })
+})