# .github/workflows/shaders.yml
# UNTRUSTED CONTEXT. This workflow runs fork-authored code and must not reference `secrets.*`.
#
# Checks every shader in shaders/ against GLSL 4.60 (compute stage included) with glslang,
# after the same preprocessing the game does (ci_shadervalidator). No graphics card is needed.

name: Shaders

on:
  push:
    branches:
      - master
    paths:
      - 'shaders/**'
      - 'gl/**'
      - 'ci_shadervalidator/**'
      - '.github/workflows/shaders.yml'
  pull_request:
    types: [ opened, reopened, synchronize ]
    paths:
      - 'shaders/**'
      - 'gl/**'
      - 'ci_shadervalidator/**'
      - '.github/workflows/shaders.yml'

permissions: {}

jobs:
  validate:
    name: Validate shaders (GLSL 4.60)
    runs-on: ubuntu-24.04
    permissions:
      contents: read
    steps:
      - uses: actions/checkout@fbc6f3992d24b796d5a048ff273f7fcc4a7b6c09 # v5.1.0

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

      # the validator only needs GLM; the other submodules are not fetched
      - name: Fetch GLM
        run: git submodule update --init --depth 1 ref/glm

      - name: Build the validator
        run: ci_shadervalidator/build.sh

      - name: Validate shaders
        working-directory: ci_shadervalidator
        run: ./validateshaders