From 1dae85574671bf3939d2b9c524f1a5cfc3ca8e58 Mon Sep 17 00:00:00 2001
From: Sampark Sharma <phantsure@github.com>
Date: Tue, 6 Dec 2022 11:38:17 +0000
Subject: [PATCH] Add fallback to gzip compression if cache not found

---
 packages/cache/src/cache.ts | 39 +++++++++++++++++++++++++++++--------
 1 file changed, 31 insertions(+), 8 deletions(-)

diff --git a/packages/cache/src/cache.ts b/packages/cache/src/cache.ts
index 609c7f94..d29eeda2 100644
--- a/packages/cache/src/cache.ts
+++ b/packages/cache/src/cache.ts
@@ -4,6 +4,8 @@ import * as utils from './internal/cacheUtils'
 import * as cacheHttpClient from './internal/cacheHttpClient'
 import {createTar, extractTar, listTar} from './internal/tar'
 import {DownloadOptions, UploadOptions} from './options'
+import {CompressionMethod} from './internal/constants'
+import {ArtifactCacheEntry} from './internal/contracts'
 
 export class ValidationError extends Error {
   constructor(message: string) {
@@ -85,17 +87,38 @@ export async function restoreCache(
     checkKey(key)
   }
 
-  const compressionMethod = await utils.getCompressionMethod()
+  let cacheEntry: ArtifactCacheEntry | null
+  let compressionMethod = await utils.getCompressionMethod()
   let archivePath = ''
   try {
-    // path are needed to compute version
-    const cacheEntry = await cacheHttpClient.getCacheEntry(keys, paths, {
-      compressionMethod
-    })
+    try {
+      // path are needed to compute version
+      cacheEntry = await cacheHttpClient.getCacheEntry(keys, paths, {
+        compressionMethod
+      })
 
-    if (!cacheEntry?.archiveLocation) {
-      // Cache not found
-      return undefined
+      if (!cacheEntry?.archiveLocation) {
+        // Cache not found
+        return undefined
+      }
+    } catch (error) {
+      if (
+        process.platform == 'win32' &&
+        compressionMethod != CompressionMethod.Gzip
+      ) {
+        // On windows, we will try to download the cache entry with the same key
+        // but with different compression method. This is to support the old cache entry created
+        // by the old version of the cache action.
+        compressionMethod = CompressionMethod.Gzip
+        cacheEntry = await cacheHttpClient.getCacheEntry(keys, paths, {
+          compressionMethod
+        })
+        if (!cacheEntry?.archiveLocation) {
+          throw error
+        }
+      } else {
+        throw error
+      }
     }
 
     archivePath = path.join(