Merge pull request #1097 from actions/users/kotewar/avoid-empty-cache-save

Avoid saving empty cache when there are no files to cache.

packages/cache/RELEASES.md

@@ -61,4 +61,7 @@
 - Update to v2.0.0 of `@actions/http-client`
 
 ### 2.0.4
-- Update to v2.0.1 of `@actions/http-client` [#1087](https://github.com/actions/toolkit/pull/1087)
+- Update to v2.0.1 of `@actions/http-client` [#1087](https://github.com/actions/toolkit/pull/1087)
+
+### 2.0.5
+- Fix to avoid saving empty cache when no files are available for caching. ([issue](https://github.com/actions/cache/issues/624))

packages/cache/__tests__/saveCache.test.ts

@@ -290,3 +290,14 @@ test('save with valid inputs uploads a cache', async () => {
   expect(saveCacheMock).toHaveBeenCalledWith(cacheId, archiveFile, undefined)
   expect(getCompressionMock).toHaveBeenCalledTimes(1)
 })
+
+test('save with non existing path should not save cache', async () => {
+  const path = 'node_modules'
+  const primaryKey = 'Linux-node-bb828da54c148048dd17899ba9fda624811cfb43'
+  jest.spyOn(cacheUtils, 'resolvePaths').mockImplementation(async () => {
+    return []
+  })
+  await expect(saveCache([path], primaryKey)).rejects.toThrowError(
+    `Path Validation Error: Path(s) specified in the action for caching do(es) not exist, hence no cache is being saved.`
+  )
+})

packages/cache/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@actions/cache",
-  "version": "2.0.4",
+  "version": "2.0.5",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@actions/cache",
-      "version": "2.0.3",
+      "version": "2.0.5",
       "license": "MIT",
       "dependencies": {
         "@actions/core": "^1.2.6",

packages/cache/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@actions/cache",
-  "version": "2.0.4",
+  "version": "2.0.5",
   "preview": true,
   "description": "Actions cache lib",
   "keywords": [

packages/cache/src/cache.ts

@@ -158,6 +158,12 @@ export async function saveCache(
   core.debug('Cache Paths:')
   core.debug(`${JSON.stringify(cachePaths)}`)
 
+  if (cachePaths.length === 0) {
+    throw new Error(
+      `Path Validation Error: Path(s) specified in the action for caching do(es) not exist, hence no cache is being saved.`
+    )
+  }
+
   const archiveFolder = await utils.createTempDirectory()
   const archivePath = path.join(
     archiveFolder,