Fix from review

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/qa-deprecated-c-cpp.yml

@@ -34,7 +34,7 @@ jobs:
             exit 1
           fi
 
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0 # Shallow clones should be disabled for a better relevancy of analysis
 

.github/workflows/qa-install-build-wrapper.yml

@@ -34,7 +34,7 @@ jobs:
             exit 1
           fi
 
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0 # Shallow clones should be disabled for a better relevancy of analysis
 

.github/workflows/qa-main.yml

@@ -17,7 +17,7 @@ jobs:
         os: [github-ubuntu-latest-s, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action without args
@@ -37,7 +37,7 @@ jobs:
         os: [github-ubuntu-latest-s, github-windows-latest-s, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with args
@@ -66,7 +66,7 @@ jobs:
           ]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with args
@@ -93,7 +93,7 @@ jobs:
         os: [github-ubuntu-latest-s, github-windows-latest-s, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with args
@@ -121,7 +121,7 @@ jobs:
         os: [github-ubuntu-latest-s, github-windows-latest-s, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with args
@@ -148,7 +148,7 @@ jobs:
         os: [github-ubuntu-latest-s, github-windows-latest-s, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with args
@@ -178,7 +178,7 @@ jobs:
         os: [github-ubuntu-latest-s, github-windows-latest-s, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - run: mkdir -p ./baseDir
@@ -198,7 +198,7 @@ jobs:
       'scannerVersion' input
     runs-on: github-ubuntu-latest-s # assumes default RUNNER_ARCH for linux is X64
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with scannerVersion
@@ -222,7 +222,7 @@ jobs:
       'scannerBinariesUrl' input with invalid URL
     runs-on: github-ubuntu-latest-s # assumes default RUNNER_ARCH for linux is X64
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with scannerBinariesUrl
@@ -250,7 +250,7 @@ jobs:
       'scannerBinariesUrl' does not allow command injection via semicolons
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with scannerBinariesUrl
@@ -271,7 +271,7 @@ jobs:
       'scannerBinariesUrl' does not allow command injection via spaces and quotes
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with scannerBinariesUrl
@@ -292,7 +292,7 @@ jobs:
       Don't fail on Gradle project
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action on Gradle project
@@ -313,7 +313,7 @@ jobs:
       Don't fail on Kotlin Gradle project
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action on Kotlin Gradle project
@@ -334,7 +334,7 @@ jobs:
       Don't fail on Maven project
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action on Maven project
@@ -367,7 +367,7 @@ jobs:
           --health-timeout 5s
           --health-retries 10
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action on sample project
@@ -390,7 +390,7 @@ jobs:
         os: [github-ubuntu-latest-s, github-windows-latest-s, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with debug mode
@@ -421,11 +421,11 @@ jobs:
           --health-timeout 5s
           --health-retries 10
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: SonarQube Cache
-        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         with:
           path: ${{ github.workspace }}/.sonar/cache
           key: ${{ runner.os }}-${{ runner.arch }}-sonar
@@ -450,7 +450,7 @@ jobs:
         os: [github-ubuntu-latest-s, github-windows-latest-s, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with deprecated SONARCLOUD_URL
@@ -469,7 +469,7 @@ jobs:
       scannerBinariesUrl redirect (3xx) is followed
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Generate SSL certificates for nginx
@@ -505,7 +505,7 @@ jobs:
         os: [github-ubuntu-latest-s, github-windows-latest-s, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with SSL certificate
@@ -556,7 +556,7 @@ jobs:
       Analysis takes into account 'SONAR_ROOT_CERT'
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Generate server certificate
@@ -664,7 +664,7 @@ jobs:
       truststore.p12 is updated when present
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Create SONAR_SSL_FOLDER with a file in it (not-truststore.p12)
@@ -793,7 +793,7 @@ jobs:
       'scannerVersion' input validation
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run action with invalid scannerVersion

.github/workflows/qa-scripts.yml

@@ -12,7 +12,7 @@ jobs:
     name: create_install_path.sh
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0 # Shallow clones should be disabled for a better relevancy of analysis
 
@@ -123,7 +123,7 @@ jobs:
       SONAR_SCANNER_URL_MACOSX_AARCH64: 'https://binaries.sonarsource.com/Distribution/sonar-scanner-cli/sonar-scanner-cli-vX.Y.Z.MMMM-macosx-aarch64.zip'
       SONAR_SCANNER_SHA_MACOSX_AARCH64: 'DOWNLOAD-SHA-MACOSX-AARCH64'
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0 # Shallow clones should be disabled for a better relevancy of analysis
 
@@ -252,7 +252,7 @@ jobs:
     name: download.sh
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0 # Shallow clones should be disabled for a better relevancy of analysis
 
@@ -321,7 +321,7 @@ jobs:
     name: fetch_latest_version.sh
     runs-on: github-ubuntu-latest-s
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0 # Shallow clones should be disabled for a better relevancy of analysis
       - name: Test script

.github/workflows/unit-tests.yml

@@ -13,7 +13,7 @@ jobs:
       contents: read
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
       - name: Setup Node.js
         uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e #v6.4.0

.github/workflows/update-tags.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
       - name: Parse semver
         uses: madhead/semver-utils@4cf918affe9106ea59f86c6250e5ec4570ac4389 # v5.0.0

.github/workflows/version_update.yml

@@ -13,7 +13,7 @@ jobs:
       new-version: ${{ steps.latest-version.outputs.sonar-scanner-version }}
     steps:
       - run: sudo apt install -y jq
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           ref: master
           fetch-depth: 0
@@ -49,7 +49,7 @@ jobs:
       pull-requests: write
     if: needs.check-version.outputs.should_update == 'true'
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           ref: master
           persist-credentials: true

dist/index.js

@@ -14,6 +14,7 @@ import * as fs$2 from 'node:fs/promises';
 import * as os$1 from 'node:os';
 import * as path$1 from 'node:path';
 import { join } from 'node:path';
+import { randomBytes } from 'node:crypto';
 import * as fs$1 from 'node:fs';
 import fs__default from 'node:fs';
 import 'http';
@@ -3900,6 +3901,10 @@ function toSemVer(version) {
 const SONARSOURCE_KEY_FINGERPRINT = "679F1EE92B19609DE816FDE81DB198F93525EC1A";
 const DEFAULT_KEYSERVER = "hkps://keyserver.ubuntu.com";
 const FALLBACK_KEYSERVER = "hkps://keys.openpgp.org";
+// Linux/macOS sockaddr_un.sun_path limit is 108 bytes including the NUL terminator.
+// S.gpg-agent.browser is the longest socket GPG creates directly under the home directory.
+const MAX_GPG_SOCKET_PATH = 107;
+const LONGEST_GPG_SOCKET = "/S.gpg-agent.browser";
 
 /**
  * Verifies the GPG signature of a downloaded file
@@ -3990,12 +3995,22 @@ function convertToUnixPath(windowsPath) {
  * @returns {string} Path to the temporary GPG home directory
  */
 function setupGpgHome() {
-  const tempDir = process.env.RUNNER_TEMP || os$1.tmpdir();
-  const gpgHome = path$1.join(tempDir, `gpg-home-${Date.now()}-${process.pid}`);
+  const dirName = `gpg-${randomBytes(4).toString("hex")}`;
 
-  fs$1.mkdirSync(gpgHome, { recursive: true, mode: 0o700 });
+  const runnertemp = process.env.RUNNER_TEMP;
+  for (const base of [runnertemp, os$1.tmpdir()].filter(Boolean)) {
+    const gpgHome = path$1.join(base, dirName);
+    if (process.platform === "win32" || (gpgHome + LONGEST_GPG_SOCKET).length <= MAX_GPG_SOCKET_PATH) {
+      fs$1.mkdirSync(gpgHome, { recursive: true, mode: 0o700 });
+      return gpgHome;
+    }
+  }
 
-  return gpgHome;
+  throw new Error(
+    `Cannot create a GPG home directory with a short enough path for GPG sockets. ` +
+    `The longest socket path (gpgHome + "${LONGEST_GPG_SOCKET}") must not exceed ${MAX_GPG_SOCKET_PATH} characters. ` +
+    `Consider setting RUNNER_TEMP to a shorter path, was "${runnertemp || '<empty>'}".`
+  );
 }
 
 /**

src/main/__tests__/gpg-verification-mocked.test.js

@@ -20,7 +20,9 @@
 
 import assert from "node:assert/strict";
 import * as fs from "node:fs";
-import { afterEach, describe, it, mock } from "node:test";
+import * as os from "node:os";
+import * as path from "node:path";
+import { afterEach, beforeEach, describe, it, mock } from "node:test";
 import { getProxyFromEnv, setupGpgHome, } from "../gpg-verification.js";
 
 /**
@@ -492,6 +494,76 @@ describe("gpg-verification with mocked exec", () => {
     });
   });
 
+  describe("setupGpgHome", () => {
+    let originalRunnerTemp;
+
+    beforeEach(() => {
+      originalRunnerTemp = process.env.RUNNER_TEMP;
+    });
+
+    afterEach(() => {
+      if (originalRunnerTemp === undefined) {
+        delete process.env.RUNNER_TEMP;
+      } else {
+        process.env.RUNNER_TEMP = originalRunnerTemp;
+      }
+    });
+
+    it("should create directory under RUNNER_TEMP when path is short enough", () => {
+      const runnerTemp = fs.mkdtempSync(path.join(os.tmpdir(), "runner-temp-"));
+      tempDirs.push(runnerTemp);
+      process.env.RUNNER_TEMP = runnerTemp;
+
+      const gpgHome = setupGpgHome();
+      tempDirs.push(gpgHome);
+
+      assert.equal(path.dirname(gpgHome), runnerTemp);
+      assert.ok(fs.existsSync(gpgHome));
+    });
+
+    it("should fall back to os.tmpdir() when RUNNER_TEMP is not set", () => {
+      delete process.env.RUNNER_TEMP;
+
+      const gpgHome = setupGpgHome();
+      tempDirs.push(gpgHome);
+
+      assert.equal(path.dirname(gpgHome), os.tmpdir());
+      assert.ok(fs.existsSync(gpgHome));
+    });
+
+    it("should fall back to os.tmpdir() when RUNNER_TEMP path is too long for GPG sockets", () => {
+      // Customer's actual RUNNER_TEMP (93 chars) — pushes the dirmngr socket path over the 107-char Linux limit
+      process.env.RUNNER_TEMP = "/codebuild/output/src2280/src/2bc4e189_61b5_4b91_abc6_9c5c06637b96/actions-runner/_work/_temp";
+
+      const gpgHome = setupGpgHome();
+      tempDirs.push(gpgHome);
+
+      assert.equal(path.dirname(gpgHome), os.tmpdir());
+      assert.ok(fs.existsSync(gpgHome));
+    });
+
+    it("should throw a clear error when all candidate paths are too long", async (t) => {
+      const longPath = "/codebuild/output/src2280/src/2bc4e189_61b5_4b91_abc6_9c5c06637b96/actions-runner/_work/_temp";
+
+      t.mock.module("node:os", {
+        namedExports: {
+          tmpdir: () => longPath,
+        },
+      });
+
+      process.env.RUNNER_TEMP = longPath;
+
+      const { setupGpgHome: freshSetupGpgHome } = await import("../gpg-verification.js?test=both-paths-too-long");
+
+      assert.throws(
+        () => freshSetupGpgHome(),
+        { message: `Cannot create a GPG home directory with a short enough path for GPG sockets. ` +
+                   `The longest socket path (gpgHome + "/S.gpg-agent.browser") must not exceed 107 characters. ` +
+                   `Consider setting RUNNER_TEMP to a shorter path, was "${longPath}".` }
+      );
+    });
+  });
+
   describe("getProxyFromEnv", () => {
     afterEach(() => {
       clearProxyEnv();

src/main/__tests__/gpg-verification.test.js

@@ -101,9 +101,8 @@ async function withMockedEnv(envVars, testFn) {
  * @returns {string} The path to the created temporary directory
  */
 function createTempDir() {
-  const tempDir = path.join(os.tmpdir(), `test-runner-temp-${Date.now()}`);
-  fs.mkdirSync(tempDir, { recursive: true });
-  return tempDir;
+  // Use a short prefix so the gpg socket path stays within the 107-char Linux limit
+  return fs.mkdtempSync(path.join(os.tmpdir(), "r"));
 }
 
 describe("gpg-verification", () => {
@@ -177,10 +176,8 @@ describe("gpg-verification", () => {
       }
     });
 
-    it("should create unique directories on multiple calls", async () => {
+    it("should create unique directories on multiple calls", () => {
       const gpgHome1 = createTrackedGpgHome(tempDirs);
-      // Small delay to ensure different timestamps
-      await new Promise((resolve) => setTimeout(resolve, 10));
       const gpgHome2 = createTrackedGpgHome(tempDirs);
 
       assert.notEqual(gpgHome1, gpgHome2);

src/main/gpg-verification.js

@@ -20,6 +20,7 @@
 
 import * as core from "@actions/core";
 import * as exec from "@actions/exec";
+import { randomBytes } from "node:crypto";
 import * as fs from "node:fs";
 import * as os from "node:os";
 import * as path from "node:path";
@@ -27,6 +28,10 @@ import * as path from "node:path";
 const SONARSOURCE_KEY_FINGERPRINT = "679F1EE92B19609DE816FDE81DB198F93525EC1A";
 const DEFAULT_KEYSERVER = "hkps://keyserver.ubuntu.com";
 const FALLBACK_KEYSERVER = "hkps://keys.openpgp.org";
+// Linux/macOS sockaddr_un.sun_path limit is 108 bytes including the NUL terminator.
+// S.gpg-agent.browser is the longest socket GPG creates directly under the home directory.
+const MAX_GPG_SOCKET_PATH = 107;
+const LONGEST_GPG_SOCKET = "/S.gpg-agent.browser";
 
 /**
  * Verifies the GPG signature of a downloaded file
@@ -117,12 +122,22 @@ export function convertToUnixPath(windowsPath) {
  * @returns {string} Path to the temporary GPG home directory
  */
 export function setupGpgHome() {
-  const tempDir = process.env.RUNNER_TEMP || os.tmpdir();
-  const gpgHome = path.join(tempDir, `gpg-home-${Date.now()}-${process.pid}`);
+  const dirName = `gpg-${randomBytes(4).toString("hex")}`;
 
-  fs.mkdirSync(gpgHome, { recursive: true, mode: 0o700 });
+  const runnertemp = process.env.RUNNER_TEMP;
+  for (const base of [runnertemp, os.tmpdir()].filter(Boolean)) {
+    const gpgHome = path.join(base, dirName);
+    if (process.platform === "win32" || (gpgHome + LONGEST_GPG_SOCKET).length <= MAX_GPG_SOCKET_PATH) {
+      fs.mkdirSync(gpgHome, { recursive: true, mode: 0o700 });
+      return gpgHome;
+    }
+  }
 
-  return gpgHome;
+  throw new Error(
+    `Cannot create a GPG home directory with a short enough path for GPG sockets. ` +
+    `The longest socket path (gpgHome + "${LONGEST_GPG_SOCKET}") must not exceed ${MAX_GPG_SOCKET_PATH} characters. ` +
+    `Consider setting RUNNER_TEMP to a shorter path, was "${runnertemp || '<empty>'}".`
+  );
 }
 
 /**