opengl.yml

name: OpenGL

on:
  push:
    branches: [main]
    paths:
      - "src/**"
      - "assets/shaders/**"
      - "config/**"
  pull_request:
    branches: [main]

concurrency:
  group: opengl-${{ github.ref }}
  cancel-in-progress: true

jobs:
  changes:
    name: Detect OpenGL-related changes
    runs-on: ubuntu-latest
    outputs:
      relevant: ${{ steps.filter.outputs.relevant }}

    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Detect relevant file changes
        id: filter
        shell: bash
        run: |
          if [ "${{ github.event_name }}" != "pull_request" ]; then
            echo "relevant=true" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          if git diff --name-only "${{ github.event.pull_request.base.sha }}" "${{ github.event.pull_request.head.sha }}" | grep -Eq '^(src/|assets/shaders/|config/)'; then
            echo "relevant=true" >> "$GITHUB_OUTPUT"
          else
            echo "relevant=false" >> "$GITHUB_OUTPUT"
          fi

  shader-validation:
    name: Shader Validation
    needs: changes
    if: needs.changes.outputs.relevant == 'true'
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          fetch-depth: 1

      - name: Install glslang
        run: sudo apt-get update && sudo apt-get install -y glslang-tools

      - name: Validate GLSL shaders
        run: |
          SHADERS=$(find assets/shaders -type f \( -name "*.vert" -o -name "*.frag" -o -name "*.geom" -o -name "*.comp" \))
          echo "Found $(echo "$SHADERS" | wc -l) shaders"
          echo "$SHADERS" | xargs glslangValidator