Test Checkout Demonstration

This repository demonstrates the issue with using ref: ${{ github.ref }} in GitHub Actions checkout steps for pull requests.

The Problem

In ArmoniK.Core workflows, all checkout actions use:

- uses: actions/checkout@v4
  with:
    ref: ${{ github.ref }}  # ← PROBLEMATIC!

This causes issues with pull requests because:

On push events:

• github.ref = refs/heads/main ✅ Works fine

On pull_request events:

• github.ref = refs/pull/123/merge ❌ Problematic
• This ref exists in the base repository but not in the fork
• Can checkout wrong code or fail entirely

The Solution

Remove ref: ${{ github.ref }} entirely!

- uses: actions/checkout@v4
  # No ref parameter - let GitHub Actions decide automatically

GitHub Actions automatically:

• On push: checks out the pushed branch
• On pull_request: checks out the PR merge commit (PR code + base branch merged)
• Works correctly for both internal and fork PRs

How to Test This Demonstration

1. On Push to main:

   • Both jobs will succeed
   • Both show the same commit

2. On Pull Request (internal or fork):

   • Compare the outputs of both jobs
   • The job WITHOUT ref will show the correct merge commit
   • The job WITH ref may show different behavior or fail

Run the Demo

1. Push this repository to GitHub
2. Create a pull request
3. Check the GitHub Actions output
4. Compare the two jobs to see the difference

Expected Results

The workflow will show side-by-side:

• ✅ Correct behavior (without ref)
• ❌ Problematic behavior (with ref)

This proves that removing ref: ${{ github.ref }} from ArmoniK.Core workflows will fix PR support.