name: Configure Test runner
description: Select the installed compiler and graphics stack without modifying the host
inputs:
  gpu:
    description: Require the native GPU stack when running on 8845
    default: "false"
runs:
  using: composite
  steps:
    - shell: bash
      env:
        NEED_GPU: ${{ inputs.gpu }}
      run: |
        if [ "$RUNNER_ENVIRONMENT" = "self-hosted" ] && [ "$NEED_GPU" = true ]; then
          for tool in clang clang++ cmake ninja ccache; do command -v "$tool"; done
          test -r /usr/share/vulkan/icd.d/dzn_icd.json
          test -e /dev/dxg
          {
            echo 'MOBILEGL_CI_NATIVE_GPU=1'
            echo 'MOBILEGL_CI_CC=clang'
            echo 'MOBILEGL_CI_CXX=clang++'
            echo 'MOBILEGL_CI_LLD=ld.lld'
            echo 'MOBILEGL_CI_SOFTWARE_RENDERING=OFF'
            echo 'VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/dzn_icd.json'
            echo 'VK_DRIVER_FILES=/usr/share/vulkan/icd.d/dzn_icd.json'
            echo 'EGL_PLATFORM=surfaceless'
            echo 'LIBGL_ALWAYS_SOFTWARE=0'
            echo 'GALLIUM_DRIVER=d3d12'
            echo 'MESA_LOADER_DRIVER_OVERRIDE=d3d12'
          } >> "$GITHUB_ENV"
        else
          {
            echo 'MOBILEGL_CI_NATIVE_GPU=0'
            echo 'MOBILEGL_CI_CC=clang-20'
            echo 'MOBILEGL_CI_CXX=clang++-20'
            echo 'MOBILEGL_CI_LLD=ld.lld-20'
            echo 'MOBILEGL_CI_SOFTWARE_RENDERING=ON'
            echo 'VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/lvp_icd.json'
            echo 'VK_DRIVER_FILES=/usr/share/vulkan/icd.d/lvp_icd.json'
          } >> "$GITHUB_ENV"
          # A stalled mirror must fail a request and retry it, not hold the install step until
          # its timeout.
          if [ -d /etc/apt/apt.conf.d ] && command -v sudo > /dev/null; then
            printf 'Acquire::Retries "3";\nAcquire::http::Timeout "30";\nAcquire::https::Timeout "30";\n' |
              sudo tee /etc/apt/apt.conf.d/80-mobilegl-ci-network > /dev/null
          fi
          # Cores go through zstd: a unit run's intentional aborts (death tests) left hundreds
          # of raw cores in /tmp and filled the disk. The handler keeps honouring each
          # process's RLIMIT_CORE (%c), so only steps that raise it with ulimit -c get cores;
          # read one with 'zstd -d core.<exe>.<pid>.zst' first.
          if [ ! -f /.dockerenv ] && command -v sudo > /dev/null && command -v zstd > /dev/null; then
            printf '#!/bin/sh\n[ "$3" = 0 ] && exec cat > /dev/null\nexec %s -q -1 -o "/tmp/core.$1.$2.zst"\n' \
              "$(command -v zstd)" | sudo tee /usr/local/bin/mobilegl-core-handler > /dev/null
            sudo chmod 755 /usr/local/bin/mobilegl-core-handler
            sudo sysctl -q -w kernel.core_pattern='|/usr/local/bin/mobilegl-core-handler %e %p %c'
          fi
        fi