From 1e5552f09ccb212bf5b77cdb3963625734abc73c Mon Sep 17 00:00:00 2001
From: "J.W. Jagersma" <jwjagersma@gmail.com>
Date: Sun, 9 Feb 2020 00:40:58 +0100
Subject: [PATCH] Run tar with sudo [actions/cache#133]

---
 __tests__/tar.test.ts | 31 ++++++++++++++++---------------
 src/tar.ts            | 10 ++++++++--
 2 files changed, 24 insertions(+), 17 deletions(-)

diff --git a/__tests__/tar.test.ts b/__tests__/tar.test.ts
index 55ff4c7..11820a1 100644
--- a/__tests__/tar.test.ts
+++ b/__tests__/tar.test.ts
@@ -25,14 +25,15 @@ test("extract tar", async () => {
     const tarPath = IS_WINDOWS
         ? `${process.env["windir"]}\\System32\\tar.exe`
         : "tar";
+    let tarParams = ["-xz", "-f", archivePath, "-C", targetDirectory];
+    let tarExec = `${tarPath}`;
+    if (!IS_WINDOWS) {
+        tarExec = "sudo";
+        tarParams = [`${tarPath}`, ...tarParams];
+    }
+
     expect(execMock).toHaveBeenCalledTimes(1);
-    expect(execMock).toHaveBeenCalledWith(`"${tarPath}"`, [
-        "-xz",
-        "-f",
-        archivePath,
-        "-C",
-        targetDirectory
-    ]);
+    expect(execMock).toHaveBeenCalledWith(`"${tarExec}"`, tarParams);
 });
 
 test("create tar", async () => {
@@ -46,13 +47,13 @@ test("create tar", async () => {
     const tarPath = IS_WINDOWS
         ? `${process.env["windir"]}\\System32\\tar.exe`
         : "tar";
+    let tarParams = ["-cz", "-f", archivePath, "-C", sourceDirectory, "."];
+    let tarExec = `${tarPath}`;
+    if (!IS_WINDOWS) {
+        tarExec = "sudo";
+        tarParams = [`${tarPath}`, ...tarParams];
+    }
+
     expect(execMock).toHaveBeenCalledTimes(1);
-    expect(execMock).toHaveBeenCalledWith(`"${tarPath}"`, [
-        "-cz",
-        "-f",
-        archivePath,
-        "-C",
-        sourceDirectory,
-        "."
-    ]);
+    expect(execMock).toHaveBeenCalledWith(`"${tarExec}"`, tarParams);
 });
diff --git a/src/tar.ts b/src/tar.ts
index 1f572d1..5f292c5 100644
--- a/src/tar.ts
+++ b/src/tar.ts
@@ -15,10 +15,16 @@ async function getTarPath(): Promise<string> {
 }
 
 async function execTar(args: string[]): Promise<void> {
+    const IS_WINDOWS = process.platform === "win32";
     try {
-        await exec(`"${await getTarPath()}"`, args);
+        const tarPath = await getTarPath();
+        let tarExec = tarPath;
+        if (!IS_WINDOWS) {
+            tarExec = "sudo";
+            args = [`${tarPath}`, ...args];
+        }
+        await exec(`"${tarExec}"`, args);
     } 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.`