Pass the token input through on GHES (#277)

README.md

@@ -169,6 +169,21 @@ The `go-version` input supports the following syntax:
 
 For more information about semantic versioning, please refer to [semver](https://github.com/npm/node-semver) documentation.
 
+## Using `setup-go` on GHES
+
+`setup-go` comes pre-installed on the appliance with GHES if Actions is enabled. When dynamically downloading Go distributions, `setup-go` downloads distributions from [`actions/go-versions`](https://github.com/actions/go-versions) on github.com (outside of the appliance). These calls to `actions/go-versions` are made via unauthenticated requests, which are limited to [60 requests per hour per IP](https://docs.github.com/en/rest/overview/resources-in-the-rest-api#rate-limiting). If more requests are made within the time frame, then you will start to see rate-limit errors during downloading that looks like: `##[error]API rate limit exceeded for...`. After that error the action will try to download versions directly from https://storage.googleapis.com/golang, but it also can have rate limit so it's better to put token.
+
+To get a higher rate limit, you can [generate a personal access token on github.com](https://github.com/settings/tokens/new) and pass it as the `token` input for the action:
+
+```yaml
+uses: actions/setup-go@v3
+with:
+  token: ${{ secrets.GH_DOTCOM_TOKEN }}
+  go-version: 1.18
+```
+
+If the runner is not able to access github.com, any Go versions requested during a workflow run must come from the runner's tool cache. See "[Setting up the tool cache on self-hosted runners without internet access](https://docs.github.com/en/enterprise-server@3.2/admin/github-actions/managing-access-to-actions-from-githubcom/setting-up-the-tool-cache-on-self-hosted-runners-without-internet-access)" for more information.
+
 # License
 
 The scripts and documentation in this project are released under the [MIT License](LICENSE)

action.yml

@@ -10,8 +10,8 @@ inputs:
     description: 'Set this option to true if you want the action to always check for the latest available version that satisfies the version spec'
     default: false
   token:
-    description: Used to pull node distributions from go-versions.  Since there's a default, this is typically not supplied by the user.
-    default: ${{ github.token }}
+    description: Used to pull node distributions from go-versions. Since there's a default, this is typically not supplied by the user. When running this action on github.com, the default value is sufficient. When running on GHES, you can pass a personal access token for github.com if you are experiencing rate limiting.
+    default: ${{ github.server_url == 'https://github.com' && github.token || '' }}
   cache:
     description: Used to specify whether caching is needed. Set to true, if you'd like to enable caching.
     default: false

dist/setup/index.js

@@ -63519,7 +63519,7 @@ function run() {
             }
             if (versionSpec) {
                 let token = core.getInput('token');
-                let auth = !token || cache_utils_1.isGhes() ? undefined : `token ${token}`;
+                let auth = !token ? undefined : `token ${token}`;
                 const checkLatest = core.getBooleanInput('check-latest');
                 const installDir = yield installer.getGo(versionSpec, checkLatest, auth, arch);
                 core.addPath(path_1.default.join(installDir, 'bin'));

src/main.ts

@@ -28,7 +28,7 @@ export async function run() {
 
     if (versionSpec) {
       let token = core.getInput('token');
-      let auth = !token || isGhes() ? undefined : `token ${token}`;
+      let auth = !token ? undefined : `token ${token}`;
 
       const checkLatest = core.getBooleanInput('check-latest');
       const installDir = await installer.getGo(