Add GNUtar as default on windows

packages/cache/src/internal/cacheUtils.ts

@@ -7,7 +7,11 @@ import * as path from 'path'
 import * as semver from 'semver'
 import * as util from 'util'
 import {v4 as uuidV4} from 'uuid'
-import {CacheFilename, CompressionMethod} from './constants'
+import {
+  CacheFilename,
+  CompressionMethod,
+  GnuTarPathOnWindows
+} from './constants'
 
 // From https://github.com/actions/toolkit/blob/main/packages/tool-cache/src/tool-cache.ts#L23
 export async function createTempDirectory(): Promise<string> {
@@ -90,7 +94,7 @@ async function getVersion(app: string): Promise<string> {
 
 // Use zstandard if possible to maximize cache performance
 export async function getCompressionMethod(): Promise<CompressionMethod> {
-  if (process.platform === 'win32' && !(await isGnuTarInstalled())) {
+  if (process.platform === 'win32' && !(await getGnuTarPathOnWindows())) {
     // Disable zstd due to bug https://github.com/actions/cache/issues/301
     return CompressionMethod.Gzip
   }
@@ -116,9 +120,12 @@ export function getCacheFileName(compressionMethod: CompressionMethod): string {
     : CacheFilename.Zstd
 }
 
-export async function isGnuTarInstalled(): Promise<boolean> {
+export async function getGnuTarPathOnWindows(): Promise<string> {
+  if (fs.existsSync(GnuTarPathOnWindows)) {
+    return GnuTarPathOnWindows
+  }
   const versionOutput = await getVersion('tar')
-  return versionOutput.toLowerCase().includes('gnu tar')
+  return versionOutput.toLowerCase().includes('gnu tar') ? io.which('tar') : ''
 }
 
 export function assertDefined<T>(name: string, value?: T): T {
@@ -134,4 +141,4 @@ export function isGhes(): boolean {
     process.env['GITHUB_SERVER_URL'] || 'https://github.com'
   )
   return ghUrl.hostname.toUpperCase() !== 'GITHUB.COM'
-}
+}

packages/cache/src/internal/constants.ts

@@ -21,3 +21,6 @@ export const DefaultRetryDelay = 5000
 // over the socket during this period, the socket is destroyed and the download
 // is aborted.
 export const SocketTimeout = 5000
+
+// The default path of GNUtar on hosted Windows runners
+export const GnuTarPathOnWindows = `${process.env['PROGRAMFILES']}\\Git\\usr\\bin\\tar.exe`

packages/cache/src/internal/tar.ts

@@ -7,21 +7,17 @@ import {CompressionMethod} from './constants'
 
 const IS_WINDOWS = process.platform === 'win32'
 
-async function getTarPath(
-  args: string[],
-  compressionMethod: CompressionMethod
-): Promise<string> {
+async function getTarPath(args: string[]): Promise<string> {
   switch (process.platform) {
     case 'win32': {
+      const gnuTar = await utils.getGnuTarPathOnWindows()
       const systemTar = `${process.env['windir']}\\System32\\tar.exe`
-      if (compressionMethod !== CompressionMethod.Gzip) {
-        // We only use zstandard compression on windows when gnu tar is installed due to
-        // a bug with compressing large files with bsdtar + zstd
+      if (gnuTar) {
+        // Use GNUtar as default on windows
         args.push('--force-local')
+        return gnuTar
       } else if (existsSync(systemTar)) {
         return systemTar
-      } else if (await utils.isGnuTarInstalled()) {
-        args.push('--force-local')
       }
       break
     }
@@ -40,13 +36,9 @@ async function getTarPath(
   return await io.which('tar', true)
 }
 
-async function execTar(
-  args: string[],
-  compressionMethod: CompressionMethod,
-  cwd?: string
-): Promise<void> {
+async function execTar(args: string[], cwd?: string): Promise<void> {
   try {
-    await exec(`"${await getTarPath(args, compressionMethod)}"`, args, {cwd})
+    await exec(`"${await getTarPath(args)}"`, args, {cwd})
   } catch (error) {
     throw new Error(`Tar failed with error: ${error?.message}`)
   }
@@ -85,7 +77,7 @@ export async function listTar(
     archivePath.replace(new RegExp(`\\${path.sep}`, 'g'), '/'),
     '-P'
   ]
-  await execTar(args, compressionMethod)
+  await execTar(args)
 }
 
 export async function extractTar(
@@ -103,7 +95,7 @@ export async function extractTar(
     '-C',
     workingDirectory.replace(new RegExp(`\\${path.sep}`, 'g'), '/')
   ]
-  await execTar(args, compressionMethod)
+  await execTar(args)
 }
 
 export async function createTar(
@@ -151,5 +143,5 @@ export async function createTar(
     '--files-from',
     manifestFilename
   ]
-  await execTar(args, compressionMethod, archiveFolder)
-}
+  await execTar(args, archiveFolder)
+}