feat: pass github token for mise calls (#205)

Author: matemoln

README.md

@@ -31,6 +31,7 @@ jobs:
             shellcheck = "0.9.0"
           working_directory: app # [default: .] directory to run mise in
           reshim: false # [default: false] run `mise reshim --all`
+          github_token: ${{ secrets.GITHUB_TOKEN }} # [default: ${{ github.token }}] GitHub token for API authentication
       - run: shellcheck scripts/*.sh
   test:
     runs-on: ubuntu-latest
@@ -41,6 +42,21 @@ jobs:
       - run: node ./my_app.js
 ```
 
+## GitHub API Rate Limits
+
+When installing tools hosted on GitHub (like `gh`, `node`, `bun`, etc.), mise needs to make API calls to GitHub's releases API. Without authentication, these calls are subject to GitHub's rate limit of 60 requests per hour, which can cause installation failures.
+
+```yaml
+- uses: jdx/mise-action@v2
+  with:
+    github_token: ${{ secrets.GITHUB_TOKEN }}
+    # your other configuration
+```
+
+**Note:** The action automatically uses `${{ github.token }}` as the default, so in most cases you don't need to explicitly provide it. However, if you encounter rate limit errors, make sure the token is being passed correctly.
+
+## Alternative Installation
+
 Alternatively, mise is easy to use in GitHub Actions even without this:
 
 ```yaml

action.yml

@@ -57,6 +57,12 @@ inputs:
     required: false
     default: "false"
     description: if true, will run `mise reshim --all` after setting up mise
+  github_token:
+    required: false
+    description: |
+      GitHub token for API authentication to avoid rate limits when installing GitHub-hosted tools.
+      Defaults to the automatic GitHub token.
+    default: ${{ github.token }}
 outputs:
   cache-hit:
     description: A boolean value to indicate if a cache was hit.

dist/index.js

@@ -53,6 +53,15 @@ async function setEnvVars(): Promise<void> {
   const logLevel = core.getInput('log_level')
   if (logLevel) set('MISE_LOG_LEVEL', logLevel)
 
+  const githubToken = core.getInput('github_token')
+  if (githubToken) {
+    set('GITHUB_TOKEN', githubToken)
+  } else {
+    core.warning(
+      'No GITHUB_TOKEN provided. You may hit GitHub API rate limits when installing tools from GitHub.'
+    )
+  }
+
   set('MISE_TRUSTED_CONFIG_PATHS', process.cwd())
   set('MISE_YES', '1')