Fallback to GNU tar if BSD tar is unavailable

__tests__/tar.test.ts

@@ -1,6 +1,6 @@
 import * as exec from "@actions/exec";
 import * as io from "@actions/io";
-import { promises as fs } from "fs";
+import * as fs from "fs";
 import * as path from "path";
 
 import { CacheFilename } from "../src/constants";
@@ -27,37 +27,82 @@ afterAll(async () => {
     await jest.requireActual("@actions/io").rmRF(getTempDir());
 });
 
-test("extract tar", async () => {
+test("extract BSD tar", async () => {
     const mkdirMock = jest.spyOn(io, "mkdirP");
     const execMock = jest.spyOn(exec, "exec");
 
-    const archivePath = "cache.tar";
+    const IS_WINDOWS = process.platform === "win32";
+    const archivePath = IS_WINDOWS
+        ? `${process.env["windir"]}\\fakepath\\cache.tar`
+        : "cache.tar";
     const workspace = process.env["GITHUB_WORKSPACE"];
 
     await tar.extractTar(archivePath);
 
     expect(mkdirMock).toHaveBeenCalledWith(workspace);
 
-    const IS_WINDOWS = process.platform === "win32";
     const tarPath = IS_WINDOWS
         ? `${process.env["windir"]}\\System32\\tar.exe`
         : "tar";
     expect(execMock).toHaveBeenCalledTimes(1);
     expect(execMock).toHaveBeenCalledWith(
         `"${tarPath}"`,
-        ["-xz", "-f", archivePath, "-P", "-C", workspace],
+        [
+            "-xz",
+            "-f",
+            archivePath?.replace(/\\/g, "/"),
+            "-P",
+            "-C",
+            workspace?.replace(/\\/g, "/")
+        ],
         { cwd: undefined }
     );
 });
 
-test("create tar", async () => {
+test("extract GNU tar", async () => {
+    const IS_WINDOWS = process.platform === "win32";
+    if (IS_WINDOWS) {
+        jest.mock("fs");
+
+        const execMock = jest.spyOn(exec, "exec");
+        const existsSyncMock = jest
+            .spyOn(fs, "existsSync")
+            .mockReturnValue(false);
+        const isGnuTarMock = jest
+            .spyOn(tar, "isGnuTar")
+            .mockReturnValue(Promise.resolve(true));
+        const archivePath = `${process.env["windir"]}\\fakepath\\cache.tar`;
+        const workspace = process.env["GITHUB_WORKSPACE"];
+
+        await tar.extractTar(archivePath);
+
+        expect(existsSyncMock).toHaveBeenCalledTimes(1);
+        expect(isGnuTarMock).toHaveBeenCalledTimes(1);
+        expect(execMock).toHaveBeenCalledTimes(2);
+        expect(execMock).toHaveBeenLastCalledWith(
+            "tar",
+            [
+                "-xz",
+                "-f",
+                archivePath?.replace(/\\/g, "/"),
+                "-P",
+                "-C",
+                workspace?.replace(/\\/g, "/"),
+                "--force-local"
+            ],
+            { cwd: undefined }
+        );
+    }
+});
+
+test("create BSD tar", async () => {
     const execMock = jest.spyOn(exec, "exec");
 
     const archiveFolder = getTempDir();
     const workspace = process.env["GITHUB_WORKSPACE"];
     const sourceDirectories = ["~/.npm/cache", `${workspace}/dist`];
 
-    await fs.mkdir(archiveFolder, { recursive: true });
+    await fs.mkdir(archiveFolder, () => void { recursive: true });
 
     await tar.createTar(archiveFolder, sourceDirectories);
 
@@ -72,10 +117,10 @@ test("create tar", async () => {
         [
             "-cz",
             "-f",
-            CacheFilename,
+            CacheFilename?.replace(/\\/g, "/"),
             "-P",
             "-C",
-            workspace,
+            workspace?.replace(/\\/g, "/"),
             "--files-from",
             "manifest.txt"
         ],

dist/restore/index.js

@@ -4959,12 +4959,30 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+const core = __importStar(__webpack_require__(470));
 const exec_1 = __webpack_require__(986);
 const io = __importStar(__webpack_require__(1));
 const fs_1 = __webpack_require__(747);
 const path = __importStar(__webpack_require__(622));
 const constants_1 = __webpack_require__(694);
-function getTarPath() {
+function isGnuTar() {
+    return __awaiter(this, void 0, void 0, function* () {
+        core.debug("Checking tar --version");
+        let versionOutput = "";
+        yield exec_1.exec("tar --version", [], {
+            ignoreReturnCode: true,
+            silent: true,
+            listeners: {
+                stdout: (data) => (versionOutput += data.toString()),
+                stderr: (data) => (versionOutput += data.toString())
+            }
+        });
+        core.debug(versionOutput.trim());
+        return versionOutput.toUpperCase().includes("GNU TAR");
+    });
+}
+exports.isGnuTar = isGnuTar;
+function getTarPath(args) {
     return __awaiter(this, void 0, void 0, function* () {
         // Explicitly use BSD Tar on Windows
         const IS_WINDOWS = process.platform === "win32";
@@ -4973,22 +4991,21 @@ function getTarPath() {
             if (fs_1.existsSync(systemTar)) {
                 return systemTar;
             }
+            else if (isGnuTar()) {
+                args.push("--force-local");
+            }
         }
         return yield io.which("tar", true);
     });
 }
 function execTar(args, cwd) {
-    var _a, _b;
+    var _a;
     return __awaiter(this, void 0, void 0, function* () {
         try {
-            yield exec_1.exec(`"${yield getTarPath()}"`, args, { cwd: cwd });
+            yield exec_1.exec(`"${yield getTarPath(args)}"`, args, { cwd: cwd });
         }
         catch (error) {
-            const IS_WINDOWS = process.platform === "win32";
+            throw new Error(`Tar failed with error: ${(_a = error) === null || _a === void 0 ? void 0 : _a.message}`);
-            if (IS_WINDOWS) {
-                throw new Error(`Tar failed with error: ${(_a = error) === null || _a === void 0 ? void 0 : _a.message}. Ensure BSD tar is installed and on the PATH.`);
-            }
-            throw new Error(`Tar failed with error: ${(_b = error) === null || _b === void 0 ? void 0 : _b.message}`);
         }
     });
 }
@@ -4997,16 +5014,25 @@ function getWorkingDirectory() {
     return _a = process.env["GITHUB_WORKSPACE"], (_a !== null && _a !== void 0 ? _a : process.cwd());
 }
 function extractTar(archivePath) {
+    var _a, _b;
     return __awaiter(this, void 0, void 0, function* () {
         // Create directory to extract tar into
         const workingDirectory = getWorkingDirectory();
         yield io.mkdirP(workingDirectory);
-        const args = ["-xz", "-f", archivePath, "-P", "-C", workingDirectory];
+        const args = [
+            "-xz",
+            "-f",
+            (_a = archivePath) === null || _a === void 0 ? void 0 : _a.replace(/\\/g, "/"),
+            "-P",
+            "-C",
+            (_b = workingDirectory) === null || _b === void 0 ? void 0 : _b.replace(/\\/g, "/")
+        ];
         yield execTar(args);
     });
 }
 exports.extractTar = extractTar;
 function createTar(archiveFolder, sourceDirectories) {
+    var _a, _b;
     return __awaiter(this, void 0, void 0, function* () {
         // Write source directories to manifest.txt to avoid command length limits
         const manifestFilename = "manifest.txt";
@@ -5015,10 +5041,14 @@ function createTar(archiveFolder, sourceDirectories) {
         const args = [
             "-cz",
             "-f",
+<<<<<<< HEAD
             constants_1.CacheFilename,
             "-P",
+=======
+            (_a = constants_1.CacheFilename) === null || _a === void 0 ? void 0 : _a.replace(/\\/g, "/"),
+>>>>>>> Fallback to GNU tar if BSD tar is unavailable
             "-C",
-            workingDirectory,
+            (_b = workingDirectory) === null || _b === void 0 ? void 0 : _b.replace(/\\/g, "/"),
             "--files-from",
             manifestFilename
         ];

dist/save/index.js

@@ -4936,12 +4936,30 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+const core = __importStar(__webpack_require__(470));
 const exec_1 = __webpack_require__(986);
 const io = __importStar(__webpack_require__(1));
 const fs_1 = __webpack_require__(747);
 const path = __importStar(__webpack_require__(622));
 const constants_1 = __webpack_require__(694);
-function getTarPath() {
+function isGnuTar() {
+    return __awaiter(this, void 0, void 0, function* () {
+        core.debug("Checking tar --version");
+        let versionOutput = "";
+        yield exec_1.exec("tar --version", [], {
+            ignoreReturnCode: true,
+            silent: true,
+            listeners: {
+                stdout: (data) => (versionOutput += data.toString()),
+                stderr: (data) => (versionOutput += data.toString())
+            }
+        });
+        core.debug(versionOutput.trim());
+        return versionOutput.toUpperCase().includes("GNU TAR");
+    });
+}
+exports.isGnuTar = isGnuTar;
+function getTarPath(args) {
     return __awaiter(this, void 0, void 0, function* () {
         // Explicitly use BSD Tar on Windows
         const IS_WINDOWS = process.platform === "win32";
@@ -4950,22 +4968,21 @@ function getTarPath() {
             if (fs_1.existsSync(systemTar)) {
                 return systemTar;
             }
+            else if (isGnuTar()) {
+                args.push("--force-local");
+            }
         }
         return yield io.which("tar", true);
     });
 }
 function execTar(args, cwd) {
-    var _a, _b;
+    var _a;
     return __awaiter(this, void 0, void 0, function* () {
         try {
-            yield exec_1.exec(`"${yield getTarPath()}"`, args, { cwd: cwd });
+            yield exec_1.exec(`"${yield getTarPath(args)}"`, args, { cwd: cwd });
         }
         catch (error) {
-            const IS_WINDOWS = process.platform === "win32";
+            throw new Error(`Tar failed with error: ${(_a = error) === null || _a === void 0 ? void 0 : _a.message}`);
-            if (IS_WINDOWS) {
-                throw new Error(`Tar failed with error: ${(_a = error) === null || _a === void 0 ? void 0 : _a.message}. Ensure BSD tar is installed and on the PATH.`);
-            }
-            throw new Error(`Tar failed with error: ${(_b = error) === null || _b === void 0 ? void 0 : _b.message}`);
         }
     });
 }
@@ -4974,16 +4991,25 @@ function getWorkingDirectory() {
     return _a = process.env["GITHUB_WORKSPACE"], (_a !== null && _a !== void 0 ? _a : process.cwd());
 }
 function extractTar(archivePath) {
+    var _a, _b;
     return __awaiter(this, void 0, void 0, function* () {
         // Create directory to extract tar into
         const workingDirectory = getWorkingDirectory();
         yield io.mkdirP(workingDirectory);
-        const args = ["-xz", "-f", archivePath, "-P", "-C", workingDirectory];
+        const args = [
+            "-xz",
+            "-f",
+            (_a = archivePath) === null || _a === void 0 ? void 0 : _a.replace(/\\/g, "/"),
+            "-P",
+            "-C",
+            (_b = workingDirectory) === null || _b === void 0 ? void 0 : _b.replace(/\\/g, "/")
+        ];
         yield execTar(args);
     });
 }
 exports.extractTar = extractTar;
 function createTar(archiveFolder, sourceDirectories) {
+    var _a, _b;
     return __awaiter(this, void 0, void 0, function* () {
         // Write source directories to manifest.txt to avoid command length limits
         const manifestFilename = "manifest.txt";
@@ -4992,10 +5018,14 @@ function createTar(archiveFolder, sourceDirectories) {
         const args = [
             "-cz",
             "-f",
+<<<<<<< HEAD
             constants_1.CacheFilename,
             "-P",
+=======
+            (_a = constants_1.CacheFilename) === null || _a === void 0 ? void 0 : _a.replace(/\\/g, "/"),
+>>>>>>> Fallback to GNU tar if BSD tar is unavailable
             "-C",
-            workingDirectory,
+            (_b = workingDirectory) === null || _b === void 0 ? void 0 : _b.replace(/\\/g, "/"),
             "--files-from",
             manifestFilename
         ];

src/tar.ts

@@ -1,3 +1,4 @@
+import * as core from "@actions/core";
 import { exec } from "@actions/exec";
 import * as io from "@actions/io";
 import { existsSync, writeFileSync } from "fs";
@@ -5,13 +6,32 @@ import * as path from "path";
 
 import { CacheFilename } from "./constants";
 
-async function getTarPath(): Promise<string> {
+export async function isGnuTar(): Promise<boolean> {
+    core.debug("Checking tar --version");
+    let versionOutput = "";
+    await exec("tar --version", [], {
+        ignoreReturnCode: true,
+        silent: true,
+        listeners: {
+            stdout: (data: Buffer): string =>
+                (versionOutput += data.toString()),
+            stderr: (data: Buffer): string => (versionOutput += data.toString())
+        }
+    });
+
+    core.debug(versionOutput.trim());
+    return versionOutput.toUpperCase().includes("GNU TAR");
+}
+
+async function getTarPath(args: string[]): Promise<string> {
     // Explicitly use BSD Tar on Windows
     const IS_WINDOWS = process.platform === "win32";
     if (IS_WINDOWS) {
         const systemTar = `${process.env["windir"]}\\System32\\tar.exe`;
         if (existsSync(systemTar)) {
             return systemTar;
+        } else if (isGnuTar()) {
+            args.push("--force-local");
         }
     }
     return await io.which("tar", true);
@@ -19,14 +39,8 @@ async function getTarPath(): Promise<string> {
 
 async function execTar(args: string[], cwd?: string): Promise<void> {
     try {
-        await exec(`"${await getTarPath()}"`, args, { cwd: cwd });
+        await exec(`"${await getTarPath(args)}"`, args, { cwd: cwd });
     } catch (error) {
-        const IS_WINDOWS = process.platform === "win32";
-        if (IS_WINDOWS) {
-            throw new Error(
-                `Tar failed with error: ${error?.message}. Ensure BSD tar is installed and on the PATH.`
-            );
-        }
         throw new Error(`Tar failed with error: ${error?.message}`);
     }
 }
@@ -39,7 +53,14 @@ export async function extractTar(archivePath: string): Promise<void> {
     // Create directory to extract tar into
     const workingDirectory = getWorkingDirectory();
     await io.mkdirP(workingDirectory);
-    const args = ["-xz", "-f", archivePath, "-P", "-C", workingDirectory];
+    const args = [
+        "-xz",
+        "-f",
+        archivePath?.replace(/\\/g, "/"),
+        "-P",
+        "-C",
+        workingDirectory?.replace(/\\/g, "/")
+    ];
     await execTar(args);
 }
 
@@ -58,10 +79,10 @@ export async function createTar(
     const args = [
         "-cz",
         "-f",
-        CacheFilename,
+        CacheFilename?.replace(/\\/g, "/"),
         "-P",
         "-C",
-        workingDirectory,
+        workingDirectory?.replace(/\\/g, "/"),
         "--files-from",
         manifestFilename
     ];