Prep Release v4.1.4 (#1704)

* Update package.json and package-lock.json to reflect v4.1.4
* Update CHANGELOG

.github/dependabot.yml

@@ -0,0 +1,20 @@
+---
+version: 2
+
+updates:
+- package-ecosystem: "npm"
+  directory: "/"
+  schedule:
+    interval: "weekly"
+  groups:
+    minor-npm-dependencies:
+      # NPM: Only group minor and patch updates (we want to carefully review major updates)
+      update-types: [minor, patch]
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: "weekly"
+  groups:
+    minor-actions-dependencies:
+      # GitHub Actions: Only group minor and patch updates (we want to carefully review major updates)
+      update-types: [minor, patch]

.github/workflows/test.yml

@@ -37,7 +37,7 @@ jobs:
     steps:
       # Clone this repo
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4.1.1
 
       # Basic checkout
       - name: Checkout basic

.github/workflows/update-test-ubuntu-git.yml

@@ -31,7 +31,7 @@ jobs:
       # Use `docker/login-action` to log in to GHCR.io. 
       # Once published, the packages are scoped to the account defined here.
       - name: Log in to the ghcr.io container registry
-        uses: docker/login-action@v3.0.0
+        uses: docker/login-action@v3.1.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -48,7 +48,7 @@ jobs:
 
       # Use `docker/build-push-action` to build (and optionally publish) the image. 
       - name: Build Docker Image (with optional Push)
-        uses: docker/build-push-action@v5.1.0
+        uses: docker/build-push-action@v5.3.0
         with:
           context: .
           file: images/test-ubuntu-git.Dockerfile

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Changelog
 
+## v4.1.4
+- Disable `extensions.worktreeConfig` when disabling `sparse-checkout` by @jww3 in https://github.com/actions/checkout/pull/1692
+- Add dependabot config by @cory-miller in https://github.com/actions/checkout/pull/1688
+- Bump the minor-actions-dependencies group with 2 updates by @dependabot in https://github.com/actions/checkout/pull/1693
+- Bump word-wrap from 1.2.3 to 1.2.5 by @dependabot in https://github.com/actions/checkout/pull/1643
+
+## v4.1.3
+- Check git version before attempting to disable `sparse-checkout` by @jww3 in https://github.com/actions/checkout/pull/1656
+- Add SSH user parameter by @cory-miller in https://github.com/actions/checkout/pull/1685
+- Update `actions/checkout` version in `update-main-version.yml` by @jww3 in https://github.com/actions/checkout/pull/1650
+
 ## v4.1.2
 - Fix: Disable sparse checkout whenever `sparse-checkout` option is not present @dscho in https://github.com/actions/checkout/pull/1598
 

README.md

@@ -8,7 +8,7 @@ Only a single commit is fetched by default, for the ref/SHA that triggered the w
 
 The auth token is persisted in the local git config. This enables your scripts to run authenticated git commands. The token is removed during post-job cleanup. Set `persist-credentials: false` to opt-out.
 
-When Git 2.28 or higher is not in your PATH, falls back to the REST API to download the files.
+When Git 2.18 or higher is not in your PATH, falls back to the REST API to download the files.
 
 # What's new
 
@@ -62,6 +62,11 @@ Please refer to the [release page](https://github.com/actions/checkout/releases/
     # Default: true
     ssh-strict: ''
 
+    # The user to use when connecting to the remote SSH host. By default 'git' is
+    # used.
+    # Default: git
+    ssh-user: ''
+
     # Whether to configure the token or SSH key with the local git config
     # Default: true
     persist-credentials: ''

__test__/git-auth-helper.test.ts

@@ -796,7 +796,8 @@ async function setup(testName: string): Promise<void> {
     ),
     tryDisableAutomaticGarbageCollection: jest.fn(),
     tryGetFetchUrl: jest.fn(),
-    tryReset: jest.fn()
+    tryReset: jest.fn(),
+    version: jest.fn()
   }
 
   settings = {
@@ -820,6 +821,7 @@ async function setup(testName: string): Promise<void> {
     sshKey: sshPath ? 'some ssh private key' : '',
     sshKnownHosts: '',
     sshStrict: true,
+    sshUser: '',
     workflowOrganizationId: 123456,
     setSafeDirectory: true,
     githubServerUrl: githubServerUrl

__test__/git-command-manager.test.ts

@@ -24,7 +24,7 @@ describe('git-auth-helper tests', () => {
       console.log(args, options.listeners.stdout)
 
       if (args.includes('version')) {
-        options.listeners.stdout(Buffer.from('2.28'))
+        options.listeners.stdout(Buffer.from('2.18'))
         return 0
       }
 
@@ -57,7 +57,7 @@ describe('git-auth-helper tests', () => {
       console.log(args, options.listeners.stdout)
 
       if (args.includes('version')) {
-        options.listeners.stdout(Buffer.from('2.28'))
+        options.listeners.stdout(Buffer.from('2.18'))
         return 0
       }
 
@@ -97,7 +97,7 @@ describe('Test fetchDepth and fetchTags options', () => {
       console.log(args, options.listeners.stdout)
 
       if (args.includes('version')) {
-        options.listeners.stdout(Buffer.from('2.28'))
+        options.listeners.stdout(Buffer.from('2.18'))
       }
 
       return 0

__test__/git-directory-helper.test.ts

@@ -501,6 +501,7 @@ async function setup(testName: string): Promise<void> {
     }),
     tryReset: jest.fn(async () => {
       return true
-    })
+    }),
+    version: jest.fn()
   }
 }

__test__/git-version.test.ts

@@ -1,4 +1,5 @@
-import {GitVersion} from '../lib/git-version'
+import {GitVersion} from '../src/git-version'
+import {MinimumGitSparseCheckoutVersion} from '../src/git-command-manager'
 
 describe('git-version tests', () => {
   it('basics', async () => {
@@ -42,4 +43,44 @@ describe('git-version tests', () => {
     expect(version.checkMinimum(new GitVersion('5.1'))).toBeFalsy()
     expect(version.checkMinimum(new GitVersion('5.1.2'))).toBeFalsy()
   })
+
+  it('sparse checkout', async () => {
+    const minSparseVer = MinimumGitSparseCheckoutVersion
+    expect(new GitVersion('1.0').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('1.99').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.0').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.24').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.24.0').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.24.9').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.25').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.25.0').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.25.1').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.25.9').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.26').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.26.0').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.26.1').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.26.9').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.27').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.27.0').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.27.1').checkMinimum(minSparseVer)).toBeFalsy()
+    expect(new GitVersion('2.27.9').checkMinimum(minSparseVer)).toBeFalsy()
+    //                             /---------------------------------------
+    //         ^^^ before         /         after vvv
+    // --------------------------/
+    expect(new GitVersion('2.28').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('2.28.0').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('2.28.1').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('2.28.9').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('2.29').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('2.29.0').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('2.29.1').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('2.29.9').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('2.99').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('3.0').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('3.99').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('4.0').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('4.99').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('5.0').checkMinimum(minSparseVer)).toBeTruthy()
+    expect(new GitVersion('5.99').checkMinimum(minSparseVer)).toBeTruthy()
+  })
 })

__test__/verify-basic.sh

@@ -18,6 +18,20 @@ else
     exit 1
   fi
 
+  # Verify that sparse-checkout is disabled.
+  SPARSE_CHECKOUT_ENABLED=$(git -C ./basic config --local --get-all core.sparseCheckout)
+  if [ "$SPARSE_CHECKOUT_ENABLED" != "" ]; then
+    echo "Expected sparse-checkout to be disabled (discovered: $SPARSE_CHECKOUT_ENABLED)"
+    exit 1
+  fi
+
+  # Verify git configuration shows worktreeConfig is effectively disabled
+  WORKTREE_CONFIG_ENABLED=$(git -C ./basic config --local --get-all extensions.worktreeConfig)
+  if [[ "$WORKTREE_CONFIG_ENABLED" != "" ]]; then
+    echo "Expected extensions.worktreeConfig (boolean) to be disabled in git config.  This could be an artifact of sparse checkout functionality."
+    exit 1
+  fi
+
   # Verify auth token
   cd basic
   git fetch --no-tags --depth=1 origin +refs/heads/main:refs/remotes/origin/main

action.yml

@@ -45,6 +45,10 @@ inputs:
       and `CheckHostIP=no` to the SSH command line. Use the input `ssh-known-hosts` to
       configure additional hosts.
     default: true
+  ssh-user:
+    description: >
+      The user to use when connecting to the remote SSH host. By default 'git' is used.
+    default: git
   persist-credentials:
     description: 'Whether to configure the token or SSH key with the local git config'
     default: true

dist/index.js

@@ -467,7 +467,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.createCommandManager = exports.MinimumGitVersion = void 0;
+exports.createCommandManager = exports.MinimumGitSparseCheckoutVersion = exports.MinimumGitVersion = void 0;
 const core = __importStar(__nccwpck_require__(2186));
 const exec = __importStar(__nccwpck_require__(1514));
 const fs = __importStar(__nccwpck_require__(7147));
@@ -481,7 +481,8 @@ const git_version_1 = __nccwpck_require__(3142);
 // Auth header not supported before 2.9
 // Wire protocol v2 not supported before 2.18
 // sparse-checkout not [well-]supported before 2.28 (see https://github.com/actions/checkout/issues/1386)
-exports.MinimumGitVersion = new git_version_1.GitVersion('2.28');
+exports.MinimumGitVersion = new git_version_1.GitVersion('2.18');
+exports.MinimumGitSparseCheckoutVersion = new git_version_1.GitVersion('2.28');
 function createCommandManager(workingDirectory, lfs, doSparseCheckout) {
     return __awaiter(this, void 0, void 0, function* () {
         return yield GitCommandManager.createCommandManager(workingDirectory, lfs, doSparseCheckout);
@@ -499,6 +500,7 @@ class GitCommandManager {
         this.lfs = false;
         this.doSparseCheckout = false;
         this.workingDirectory = '';
+        this.gitVersion = new git_version_1.GitVersion();
     }
     branchDelete(remote, branch) {
         return __awaiter(this, void 0, void 0, function* () {
@@ -524,7 +526,13 @@ class GitCommandManager {
     branchList(remote) {
         return __awaiter(this, void 0, void 0, function* () {
             const result = [];
-            const args = ['rev-parse', '--symbolic'];
+            // Note, this implementation uses "rev-parse --symbolic-full-name" because the output from
+            // "branch --list" is more difficult when in a detached HEAD state.
+            // TODO(https://github.com/actions/checkout/issues/786): this implementation uses
+            // "rev-parse --symbolic-full-name" because there is a bug
+            // in Git 2.18 that causes "rev-parse --symbolic" to output symbolic full names. When
+            // 2.18 is no longer supported, we can switch back to --symbolic.
+            const args = ['rev-parse', '--symbolic-full-name'];
             if (remote) {
                 args.push('--remotes=origin');
             }
@@ -574,6 +582,8 @@ class GitCommandManager {
     disableSparseCheckout() {
         return __awaiter(this, void 0, void 0, function* () {
             yield this.execGit(['sparse-checkout', 'disable']);
+            // Disabling 'sparse-checkout` leaves behind an undesirable side-effect in config (even in a pristine environment).
+            yield this.tryConfigUnset('extensions.worktreeConfig', false);
         });
     }
     sparseCheckout(sparseCheckout) {
@@ -845,6 +855,11 @@ class GitCommandManager {
             return output.exitCode === 0;
         });
     }
+    version() {
+        return __awaiter(this, void 0, void 0, function* () {
+            return this.gitVersion;
+        });
+    }
     static createCommandManager(workingDirectory, lfs, doSparseCheckout) {
         return __awaiter(this, void 0, void 0, function* () {
             const result = new GitCommandManager();
@@ -896,21 +911,21 @@ class GitCommandManager {
             this.gitPath = yield io.which('git', true);
             // Git version
             core.debug('Getting git version');
-            let gitVersion = new git_version_1.GitVersion();
+            this.gitVersion = new git_version_1.GitVersion();
             let gitOutput = yield this.execGit(['version']);
             let stdout = gitOutput.stdout.trim();
             if (!stdout.includes('\n')) {
                 const match = stdout.match(/\d+\.\d+(\.\d+)?/);
                 if (match) {
-                    gitVersion = new git_version_1.GitVersion(match[0]);
+                    this.gitVersion = new git_version_1.GitVersion(match[0]);
                 }
             }
-            if (!gitVersion.isValid()) {
+            if (!this.gitVersion.isValid()) {
                 throw new Error('Unable to determine git version');
             }
             // Minimum git version
-            if (!gitVersion.checkMinimum(exports.MinimumGitVersion)) {
-                throw new Error(`Minimum required git version is ${exports.MinimumGitVersion}. Your git ('${this.gitPath}') is ${gitVersion}`);
+            if (!this.gitVersion.checkMinimum(exports.MinimumGitVersion)) {
+                throw new Error(`Minimum required git version is ${exports.MinimumGitVersion}. Your git ('${this.gitPath}') is ${this.gitVersion}`);
             }
             if (this.lfs) {
                 // Git-lfs version
@@ -937,8 +952,13 @@ class GitCommandManager {
                 }
             }
             this.doSparseCheckout = doSparseCheckout;
+            if (this.doSparseCheckout) {
+                if (!this.gitVersion.checkMinimum(exports.MinimumGitSparseCheckoutVersion)) {
+                    throw new Error(`Minimum Git version required for sparse checkout is ${exports.MinimumGitSparseCheckoutVersion}. Your git ('${this.gitPath}') is ${this.gitVersion}`);
+                }
+            }
             // Set the user agent
-            const gitHttpUserAgent = `git/${gitVersion} (github-actions-checkout)`;
+            const gitHttpUserAgent = `git/${this.gitVersion} (github-actions-checkout)`;
             core.debug(`Set git useragent to: ${gitHttpUserAgent}`);
             this.gitEnv['GIT_HTTP_USER_AGENT'] = gitHttpUserAgent;
         });
@@ -1143,6 +1163,7 @@ const path = __importStar(__nccwpck_require__(1017));
 const refHelper = __importStar(__nccwpck_require__(8601));
 const stateHelper = __importStar(__nccwpck_require__(8647));
 const urlHelper = __importStar(__nccwpck_require__(9437));
+const git_command_manager_1 = __nccwpck_require__(738);
 function getSource(settings) {
     return __awaiter(this, void 0, void 0, function* () {
         // Repository URL
@@ -1276,7 +1297,11 @@ function getSource(settings) {
             }
             // Sparse checkout
             if (!settings.sparseCheckout) {
-                yield git.disableSparseCheckout();
+                let gitVersion = yield git.version();
+                // no need to disable sparse-checkout if the installed git runtime doesn't even support it.
+                if (gitVersion.checkMinimum(git_command_manager_1.MinimumGitSparseCheckoutVersion)) {
+                    yield git.disableSparseCheckout();
+                }
             }
             else {
                 core.startGroup('Setting up sparse checkout');
@@ -1775,6 +1800,7 @@ function getInputs() {
         result.sshKnownHosts = core.getInput('ssh-known-hosts');
         result.sshStrict =
             (core.getInput('ssh-strict') || 'true').toUpperCase() === 'TRUE';
+        result.sshUser = core.getInput('ssh-user');
         // Persist credentials
         result.persistCredentials =
             (core.getInput('persist-credentials') || 'false').toUpperCase() === 'TRUE';
@@ -2377,7 +2403,8 @@ function getFetchUrl(settings) {
     const encodedOwner = encodeURIComponent(settings.repositoryOwner);
     const encodedName = encodeURIComponent(settings.repositoryName);
     if (settings.sshKey) {
-        return `git@${serviceUrl.hostname}:${encodedOwner}/${encodedName}.git`;
+        const user = settings.sshUser.length > 0 ? settings.sshUser : 'git';
+        return `${user}@${serviceUrl.hostname}:${encodedOwner}/${encodedName}.git`;
     }
     // "origin" is SCHEME://HOSTNAME[:PORT]
     return `${serviceUrl.origin}/${encodedOwner}/${encodedName}`;

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "checkout",
-  "version": "5.0.0",
+  "version": "4.1.4",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "checkout",
-      "version": "5.0.0",
+      "version": "4.1.4",
       "license": "MIT",
       "dependencies": {
         "@actions/core": "^1.10.0",
@@ -9129,9 +9129,9 @@
       }
     },
     "node_modules/word-wrap": {
-      "version": "1.2.3",
-      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
-      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
+      "integrity": "sha512-BN22B5eaMMI9UMtjrGd5g5eCYPpCPDUy0FJXbYsaT5zYxjFOckS53SQDE3pWkVoWpHXVb3BrYcEN4Twa55B5cA==",
       "dev": true,
       "engines": {
         "node": ">=0.10.0"
@@ -16055,9 +16055,9 @@
       }
     },
     "word-wrap": {
-      "version": "1.2.3",
-      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
-      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
+      "integrity": "sha512-BN22B5eaMMI9UMtjrGd5g5eCYPpCPDUy0FJXbYsaT5zYxjFOckS53SQDE3pWkVoWpHXVb3BrYcEN4Twa55B5cA==",
       "dev": true
     },
     "wrap-ansi": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "checkout",
-  "version": "5.0.0",
+  "version": "4.1.4",
   "description": "checkout action",
   "main": "lib/main.js",
   "scripts": {

src/git-command-manager.ts

@@ -12,7 +12,8 @@ import {GitVersion} from './git-version'
 // Auth header not supported before 2.9
 // Wire protocol v2 not supported before 2.18
 // sparse-checkout not [well-]supported before 2.28 (see https://github.com/actions/checkout/issues/1386)
-export const MinimumGitVersion = new GitVersion('2.28')
+export const MinimumGitVersion = new GitVersion('2.18')
+export const MinimumGitSparseCheckoutVersion = new GitVersion('2.28')
 
 export interface IGitCommandManager {
   branchDelete(remote: boolean, branch: string): Promise<void>
@@ -61,6 +62,7 @@ export interface IGitCommandManager {
   tryDisableAutomaticGarbageCollection(): Promise<boolean>
   tryGetFetchUrl(): Promise<string>
   tryReset(): Promise<boolean>
+  version(): Promise<GitVersion>
 }
 
 export async function createCommandManager(
@@ -84,6 +86,7 @@ class GitCommandManager {
   private lfs = false
   private doSparseCheckout = false
   private workingDirectory = ''
+  private gitVersion: GitVersion = new GitVersion()
 
   // Private constructor; use createCommandManager()
   private constructor() {}
@@ -111,7 +114,16 @@ class GitCommandManager {
 
   async branchList(remote: boolean): Promise<string[]> {
     const result: string[] = []
-    const args = ['rev-parse', '--symbolic']
+
+    // Note, this implementation uses "rev-parse --symbolic-full-name" because the output from
+    // "branch --list" is more difficult when in a detached HEAD state.
+
+    // TODO(https://github.com/actions/checkout/issues/786): this implementation uses
+    // "rev-parse --symbolic-full-name" because there is a bug
+    // in Git 2.18 that causes "rev-parse --symbolic" to output symbolic full names. When
+    // 2.18 is no longer supported, we can switch back to --symbolic.
+
+    const args = ['rev-parse', '--symbolic-full-name']
     if (remote) {
       args.push('--remotes=origin')
     } else {
@@ -166,6 +178,8 @@ class GitCommandManager {
 
   async disableSparseCheckout(): Promise<void> {
     await this.execGit(['sparse-checkout', 'disable'])
+    // Disabling 'sparse-checkout` leaves behind an undesirable side-effect in config (even in a pristine environment).
+    await this.tryConfigUnset('extensions.worktreeConfig', false)
   }
 
   async sparseCheckout(sparseCheckout: string[]): Promise<void> {
@@ -472,6 +486,10 @@ class GitCommandManager {
     return output.exitCode === 0
   }
 
+  async version(): Promise<GitVersion> {
+    return this.gitVersion
+  }
+
   static async createCommandManager(
     workingDirectory: string,
     lfs: boolean,
@@ -548,23 +566,23 @@ class GitCommandManager {
 
     // Git version
     core.debug('Getting git version')
-    let gitVersion = new GitVersion()
+    this.gitVersion = new GitVersion()
     let gitOutput = await this.execGit(['version'])
     let stdout = gitOutput.stdout.trim()
     if (!stdout.includes('\n')) {
       const match = stdout.match(/\d+\.\d+(\.\d+)?/)
       if (match) {
-        gitVersion = new GitVersion(match[0])
+        this.gitVersion = new GitVersion(match[0])
       }
     }
-    if (!gitVersion.isValid()) {
+    if (!this.gitVersion.isValid()) {
       throw new Error('Unable to determine git version')
     }
 
     // Minimum git version
-    if (!gitVersion.checkMinimum(MinimumGitVersion)) {
+    if (!this.gitVersion.checkMinimum(MinimumGitVersion)) {
       throw new Error(
-        `Minimum required git version is ${MinimumGitVersion}. Your git ('${this.gitPath}') is ${gitVersion}`
+        `Minimum required git version is ${MinimumGitVersion}. Your git ('${this.gitPath}') is ${this.gitVersion}`
       )
     }
 
@@ -597,9 +615,15 @@ class GitCommandManager {
     }
 
     this.doSparseCheckout = doSparseCheckout
-
+    if (this.doSparseCheckout) {
+      if (!this.gitVersion.checkMinimum(MinimumGitSparseCheckoutVersion)) {
+        throw new Error(
+          `Minimum Git version required for sparse checkout is ${MinimumGitSparseCheckoutVersion}. Your git ('${this.gitPath}') is ${this.gitVersion}`
+        )
+      }
+    }
     // Set the user agent
-    const gitHttpUserAgent = `git/${gitVersion} (github-actions-checkout)`
+    const gitHttpUserAgent = `git/${this.gitVersion} (github-actions-checkout)`
     core.debug(`Set git useragent to: ${gitHttpUserAgent}`)
     this.gitEnv['GIT_HTTP_USER_AGENT'] = gitHttpUserAgent
   }

src/git-source-provider.ts

@@ -9,7 +9,10 @@ import * as path from 'path'
 import * as refHelper from './ref-helper'
 import * as stateHelper from './state-helper'
 import * as urlHelper from './url-helper'
-import {IGitCommandManager} from './git-command-manager'
+import {
+  MinimumGitSparseCheckoutVersion,
+  IGitCommandManager
+} from './git-command-manager'
 import {IGitSourceSettings} from './git-source-settings'
 
 export async function getSource(settings: IGitSourceSettings): Promise<void> {
@@ -209,7 +212,11 @@ export async function getSource(settings: IGitSourceSettings): Promise<void> {
 
     // Sparse checkout
     if (!settings.sparseCheckout) {
-      await git.disableSparseCheckout()
+      let gitVersion = await git.version()
+      // no need to disable sparse-checkout if the installed git runtime doesn't even support it.
+      if (gitVersion.checkMinimum(MinimumGitSparseCheckoutVersion)) {
+        await git.disableSparseCheckout()
+      }
     } else {
       core.startGroup('Setting up sparse checkout')
       if (settings.sparseCheckoutConeMode) {

src/git-source-settings.ts

@@ -94,6 +94,11 @@ export interface IGitSourceSettings {
    */
   sshStrict: boolean
 
+  /**
+   * The SSH user to login as
+   */
+  sshUser: string
+
   /**
    * Indicates whether to persist the credentials on disk to enable scripting authenticated git commands
    */

src/input-helper.ts

@@ -143,6 +143,7 @@ export async function getInputs(): Promise<IGitSourceSettings> {
   result.sshKnownHosts = core.getInput('ssh-known-hosts')
   result.sshStrict =
     (core.getInput('ssh-strict') || 'true').toUpperCase() === 'TRUE'
+  result.sshUser = core.getInput('ssh-user')
 
   // Persist credentials
   result.persistCredentials =

src/url-helper.ts

@@ -12,7 +12,8 @@ export function getFetchUrl(settings: IGitSourceSettings): string {
   const encodedOwner = encodeURIComponent(settings.repositoryOwner)
   const encodedName = encodeURIComponent(settings.repositoryName)
   if (settings.sshKey) {
-    return `git@${serviceUrl.hostname}:${encodedOwner}/${encodedName}.git`
+    const user = settings.sshUser.length > 0 ? settings.sshUser : 'git'
+    return `${user}@${serviceUrl.hostname}:${encodedOwner}/${encodedName}.git`
   }
 
   // "origin" is SCHEME://HOSTNAME[:PORT]