Merge b800b38ab2b6b498c12cb66cc1caddb94b00a157 into 3b9b8c884f6b4bb4d5be2779c26374abadae0871

Add a scenario where it is necessary to push a commit to a pull request.

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## v4.2.2
+* `url-helper.ts` now leverages well-known environment variables by @jww3 in https://github.com/actions/checkout/pull/1941
+* Expand unit test coverage for `isGhes` by @jww3 in https://github.com/actions/checkout/pull/1946
+
 ## v4.2.1
 * Check out other refs/* by commit if provided, fall back to ref by @orhantoy in https://github.com/actions/checkout/pull/1924
 

README.md

@@ -143,6 +143,7 @@ Please refer to the [release page](https://github.com/actions/checkout/releases/
 - [Checkout pull request HEAD commit instead of merge commit](#Checkout-pull-request-HEAD-commit-instead-of-merge-commit)
 - [Checkout pull request on closed event](#Checkout-pull-request-on-closed-event)
 - [Push a commit using the built-in token](#Push-a-commit-using-the-built-in-token)
+- [Push a commit to a PR using the built-in token](#Push-a-commit-to-a-PR-using-the-built-in-token)
 
 ## Fetch only the root files
 
@@ -288,6 +289,31 @@ jobs:
 ```
 *NOTE:* The user email is `{user.id}+{user.login}@users.noreply.github.com`. See users API: https://api.github.com/users/github-actions%5Bbot%5D
 
+## Push a commit to a PR using the built-in token
+
+In a pull request trigger, `ref` is required as GitHub Actions checks out in detached HEAD mode, meaning it doesn’t check out your branch by default.
+
+```yaml
+on: pull_request
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
+      - run: |
+          date > generated.txt
+          # Note: the following account information will not work on GHES
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add .
+          git commit -m "generated"
+          git push
+```
+*NOTE:* The user email is `{user.id}+{user.login}@users.noreply.github.com`. See users API: https://api.github.com/users/github-actions%5Bbot%5D
+
+
 # License
 
 The scripts and documentation in this project are released under the [MIT License](LICENSE)

__test__/url-helper.test.ts

@@ -24,13 +24,50 @@ describe('getServerUrl tests', () => {
 })
 
 describe('isGhes tests', () => {
+  const pristineEnv = process.env
+
+  beforeEach(() => {
+    jest.resetModules()
+    process.env = {...pristineEnv}
+  })
+
+  afterAll(() => {
+    process.env = pristineEnv
+  })
+
   it('basics', async () => {
+    delete process.env['GITHUB_SERVER_URL']
     expect(urlHelper.isGhes()).toBeFalsy()
     expect(urlHelper.isGhes('https://github.com')).toBeFalsy()
     expect(urlHelper.isGhes('https://contoso.ghe.com')).toBeFalsy()
     expect(urlHelper.isGhes('https://test.github.localhost')).toBeFalsy()
     expect(urlHelper.isGhes('https://src.onpremise.fabrikam.com')).toBeTruthy()
   })
+
+  it('returns false when the GITHUB_SERVER_URL environment variable is not defined', async () => {
+    delete process.env['GITHUB_SERVER_URL']
+    expect(urlHelper.isGhes()).toBeFalsy()
+  })
+
+  it('returns false when the GITHUB_SERVER_URL environment variable is set to github.com', async () => {
+    process.env['GITHUB_SERVER_URL'] = 'https://github.com'
+    expect(urlHelper.isGhes()).toBeFalsy()
+  })
+
+  it('returns false when the GITHUB_SERVER_URL environment variable is set to a GitHub Enterprise Cloud-style URL', async () => {
+    process.env['GITHUB_SERVER_URL'] = 'https://contoso.ghe.com'
+    expect(urlHelper.isGhes()).toBeFalsy()
+  })
+
+  it('returns false when the GITHUB_SERVER_URL environment variable has a .localhost suffix', async () => {
+    process.env['GITHUB_SERVER_URL'] = 'https://mock-github.localhost'
+    expect(urlHelper.isGhes()).toBeFalsy()
+  })
+
+  it('returns true when the GITHUB_SERVER_URL environment variable is set to some other URL', async () => {
+    process.env['GITHUB_SERVER_URL'] = 'https://src.onpremise.fabrikam.com'
+    expect(urlHelper.isGhes()).toBeTruthy()
+  })
 })
 
 describe('getServerApiUrl tests', () => {

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "checkout",
-  "version": "4.2.1",
+  "version": "4.2.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "checkout",
-      "version": "4.2.1",
+      "version": "4.2.2",
       "license": "MIT",
       "dependencies": {
         "@actions/core": "^1.10.1",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "checkout",
-  "version": "4.2.1",
+  "version": "4.2.2",
   "description": "checkout action",
   "main": "lib/main.js",
   "scripts": {