Decoupled cache from GitHub API

Signed-off-by: Guillermo Mazzola <guillermo.mazzola@glovoapp.com>

action.yml

@@ -28,6 +28,12 @@ inputs:
     required: false
     default: ${{ github.event.repository != null && github.ref_name != github.event.repository.default_branch }}
 
+  cache-provider:
+    description: |
+      The cache provider to use for caching files. Currently only supports `github`.
+    required: false
+    default: github
+
   cache-write-only:
     description: |
       When 'true', entries will not be restored from the cache but will be saved at the end of the Job. 

src/cache-provider-github.ts

@@ -0,0 +1,24 @@
+import * as cache from '@actions/cache'
+import {CacheEntry, CacheProvider} from './cache-provider'
+
+const SEGMENT_DOWNLOAD_TIMEOUT_VAR = 'SEGMENT_DOWNLOAD_TIMEOUT_MINS'
+const SEGMENT_DOWNLOAD_TIMEOUT_DEFAULT = 10 * 60 * 1000 // 10 minutes
+
+class GitHubCache implements CacheProvider {
+    // Only override the read timeout if the SEGMENT_DOWNLOAD_TIMEOUT_MINS env var has NOT been set
+    private cacheRestoreOptions = !process.env[SEGMENT_DOWNLOAD_TIMEOUT_VAR]
+        ? {segmentTimeoutInMs: SEGMENT_DOWNLOAD_TIMEOUT_DEFAULT}
+        : {}
+
+    async saveCache(paths: string[], key: string): Promise<CacheEntry> {
+        return cache.saveCache(paths, key)
+    }
+
+    async restoreCache(paths: string[], primaryKey: string, restoreKeys?: string[]): Promise<CacheEntry | undefined> {
+        return cache.restoreCache(paths, primaryKey, restoreKeys, this.cacheRestoreOptions)
+    }
+}
+
+export default function createGitHubCache(): CacheProvider | undefined {
+    return cache.isFeatureAvailable() ? new GitHubCache() : undefined
+}

src/cache-provider.ts

@@ -0,0 +1,10 @@
+export interface CacheProvider {
+    saveCache(paths: string[], key: string): Promise<CacheEntry>
+
+    restoreCache(paths: string[], primaryKey: string, restoreKeys?: string[]): Promise<CacheEntry | undefined>
+}
+
+export interface CacheEntry {
+    key: string
+    size?: number
+}

src/cache-reporting.ts

@@ -1,5 +1,5 @@
 import * as core from '@actions/core'
-import * as cache from '@actions/cache'
+import {cache} from './cache-utils'
 
 /**
  * Collects information on what entries were saved and restored during the action.
@@ -16,7 +16,7 @@ export class CacheListener {
     }
 
     get cacheStatus(): string {
-        if (!cache.isFeatureAvailable()) return 'not available'
+        if (!cache) return 'not available'
         if (this.cacheDisabled) return 'disabled'
         if (this.cacheWriteOnly) return 'write-only'
         if (this.cacheReadOnly) return 'read-only'

src/cache-utils.ts

@@ -1,5 +1,4 @@
 import * as core from '@actions/core'
-import * as cache from '@actions/cache'
 import * as github from '@actions/github'
 import * as exec from '@actions/exec'
 
@@ -10,6 +9,9 @@ import * as fs from 'fs'
 import * as params from './input-params'
 
 import {CacheEntryListener} from './cache-reporting'
+import {CacheEntry, CacheProvider} from './cache-provider'
+import {ReserveCacheError, ValidationError} from '@actions/cache'
+import createGitHubCache from './cache-provider-github'
 
 const CACHE_PROTOCOL_VERSION = 'v8-'
 
@@ -19,14 +21,14 @@ const CACHE_KEY_JOB_VAR = 'GRADLE_BUILD_ACTION_CACHE_KEY_JOB'
 const CACHE_KEY_JOB_INSTANCE_VAR = 'GRADLE_BUILD_ACTION_CACHE_KEY_JOB_INSTANCE'
 const CACHE_KEY_JOB_EXECUTION_VAR = 'GRADLE_BUILD_ACTION_CACHE_KEY_JOB_EXECUTION'
 
-const SEGMENT_DOWNLOAD_TIMEOUT_VAR = 'SEGMENT_DOWNLOAD_TIMEOUT_MINS'
-const SEGMENT_DOWNLOAD_TIMEOUT_DEFAULT = 10 * 60 * 1000 // 10 minutes
+export const cache = provisionCache()
+
+function provisionCache(): CacheProvider | undefined {
+    return createGitHubCache()
+}
 
 export function isCacheDisabled(): boolean {
-    if (!cache.isFeatureAvailable()) {
-        return true
-    }
-    return params.isCacheDisabled()
+    return !cache || params.isCacheDisabled()
 }
 
 export function isCacheReadOnly(): boolean {
@@ -146,14 +148,10 @@ export async function restoreCache(
     cacheKey: string,
     cacheRestoreKeys: string[],
     listener: CacheEntryListener
-): Promise<cache.CacheEntry | undefined> {
+): Promise<CacheEntry | undefined> {
     listener.markRequested(cacheKey, cacheRestoreKeys)
     try {
-        // Only override the read timeout if the SEGMENT_DOWNLOAD_TIMEOUT_MINS env var has NOT been set
-        const cacheRestoreOptions = process.env[SEGMENT_DOWNLOAD_TIMEOUT_VAR]
-            ? {}
-            : {segmentTimeoutInMs: SEGMENT_DOWNLOAD_TIMEOUT_DEFAULT}
-        const restoredEntry = await cache.restoreCache(cachePath, cacheKey, cacheRestoreKeys, cacheRestoreOptions)
+        const restoredEntry = await cache?.restoreCache(cachePath, cacheKey, cacheRestoreKeys)
         if (restoredEntry !== undefined) {
             listener.markRestored(restoredEntry.key, restoredEntry.size)
         }
@@ -167,10 +165,12 @@ export async function restoreCache(
 
 export async function saveCache(cachePath: string[], cacheKey: string, listener: CacheEntryListener): Promise<void> {
     try {
-        const savedEntry = await cache.saveCache(cachePath, cacheKey)
-        listener.markSaved(savedEntry.key, savedEntry.size)
+        const savedEntry = await cache?.saveCache(cachePath, cacheKey)
+        if (savedEntry) {
+            listener.markSaved(savedEntry.key, savedEntry.size)
+        }
     } catch (error) {
-        if (error instanceof cache.ReserveCacheError) {
+        if (error instanceof ReserveCacheError) {
             listener.markAlreadyExists(cacheKey)
         } else {
             listener.markNotSaved((error as Error).message)
@@ -188,11 +188,11 @@ export function cacheDebug(message: string): void {
 }
 
 export function handleCacheFailure(error: unknown, message: string): void {
-    if (error instanceof cache.ValidationError) {
+    if (error instanceof ValidationError) {
         // Fail on cache validation errors
         throw error
     }
-    if (error instanceof cache.ReserveCacheError) {
+    if (error instanceof ReserveCacheError) {
         // Reserve cache errors are expected if the artifact has been previously cached
         core.info(`${message}: ${error}`)
     } else {

src/provision.ts

@@ -3,13 +3,12 @@ import * as os from 'os'
 import * as path from 'path'
 import * as httpm from '@actions/http-client'
 import * as core from '@actions/core'
-import * as cache from '@actions/cache'
 import * as toolCache from '@actions/tool-cache'
 
 import * as gradlew from './gradlew'
 import * as params from './input-params'
 import * as layout from './repository-layout'
-import {handleCacheFailure, isCacheDisabled, isCacheReadOnly} from './cache-utils'
+import {cache, handleCacheFailure, isCacheDisabled, isCacheReadOnly} from './cache-utils'
 
 const gradleVersionsBaseUrl = 'https://services.gradle.org/versions'
 
@@ -133,7 +132,7 @@ async function downloadAndCacheGradleDistribution(versionInfo: GradleVersionInfo
 
     const cacheKey = `gradle-${versionInfo.version}`
     try {
-        const restoreKey = await cache.restoreCache([downloadPath], cacheKey)
+        const restoreKey = await cache?.restoreCache([downloadPath], cacheKey)
         if (restoreKey) {
             core.info(`Restored Gradle distribution ${cacheKey} from cache to ${downloadPath}`)
             return downloadPath
@@ -145,7 +144,7 @@ async function downloadAndCacheGradleDistribution(versionInfo: GradleVersionInfo
     core.info(`Gradle distribution ${versionInfo.version} not found in cache. Will download.`)
     await downloadGradleDistribution(versionInfo, downloadPath)
 
-    if (!isCacheReadOnly()) {
+    if (!isCacheReadOnly() && cache) {
         try {
             await cache.saveCache([downloadPath], cacheKey)
         } catch (error) {