WIP: Another stab at using the GHA GPU runners

Signed-off-by: Larry Gritz <[email protected]>

.github/workflows/gpu.yml

@@ -0,0 +1,112 @@
+# Copyright Contributors to the Open Shading Language project.
+# SPDX-License-Identifier: BSD-3-Clause
+# https://github.com/AcademySoftwareFoundation/OpenShadingLanguage
+
+# GitHub Actions workflow file for CI
+# https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions
+
+name: CI-GPU
+
+on:
+  push:
+    # Skip jobs when only documentation files are changed
+    paths-ignore:
+      - '**.md'
+      - '**.rst'
+      - '**.tex'
+  pull_request:
+    paths-ignore:
+      - '**.md'
+      - '**.rst'
+      - '**.tex'
+  # schedule:
+  #   # Full nightly build, for the main project repo (not for forks)
+  #   - cron: "0 6 * * *"
+  #     if: github.repository == 'AcademySoftwareFoundation/OpenShadingLanguage'
+
+
+permissions: read-all
+
+
+jobs:
+
+  ubuntu-gpu:
+    name: "Ubuntu GPU ${{matrix.desc}}"
+    if: github.repository == 'AcademySoftwareFoundation/OpenShadingLanguage' &&
+        ((github.event_name == 'pull_request' && contains(github.head_ref, 'gpu')) ||
+         (github.event_name == 'push' || github.event_name == 'schedule'))
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - desc: latest releases gcc11/C++17 llvm15 boost1.71 exr3.2 py3.9 avx2 batch-b16avx512
+            nametag: linux-latest-releases
+            runner: ubuntu-20.04-gpu-t4-4c-16g-176h
+            cxx_compiler: g++-11
+            cxx_std: 17
+            fmt_ver: 10.1.0
+            openexr_ver: v3.2.1
+            openimageio_ver: master
+            pybind11_ver: v2.10.0
+            python_ver: "3.10"
+            simd: avx2,f16c
+            # batched: b8_AVX2,b8_AVX512,b16_AVX512
+            setenvs: export LLVM_VERSION=15.0.6
+                            LLVM_DISTRO_NAME=ubuntu-18.04
+                            OPENCOLORIO_VERSION=v2.2.0
+                            PUGIXML_VERSION=v1.13
+                            USE_GPU=1
+
+    runs-on: ${{matrix.runner}}
+    env:
+      CXX: ${{matrix.cxx_compiler}}
+      CC: ${{matrix.cc_compiler}}
+      CMAKE_CXX_STANDARD: ${{matrix.cxx_std}}
+      FMT_VERSION: ${{matrix.fmt_ver}}
+      OPENEXR_VERSION: ${{matrix.openexr_ver}}
+      OPENIMAGEIO_VERSION: ${{matrix.openimageio_ver}}
+      PYBIND11_VERSION: ${{matrix.pybind11_ver}}
+      PYTHON_VERSION: ${{matrix.python_ver}}
+      USE_BATCHED: ${{matrix.batched}}
+      USE_SIMD: ${{matrix.simd}}
+    steps:
+      # We would like to use harden-runner, but it flags too many false
+      # positives, every time we download a dependency. We should use it only
+      # on CI runs where we are producing artifacts that users might rely on.
+      # - name: Harden Runner
+      #   uses: step-security/harden-runner@248ae51c2e8cc9622ecf50685c8bf7150c6e8813 # v1.4.3
+      #   with:
+      #     egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs
+      - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # v3.0.2
+      - name: Prepare ccache timestamp
+        id: ccache_cache_keys
+        run: echo "::set-output name=date::`date -u +'%Y-%m-%dT%H:%M:%SZ'`"
+      - name: ccache
+        id: ccache
+        uses: actions/cache@c3f1317a9e7b1ef106c153ac8c0f00fed3ddbc0d # v3.0.4
+        with:
+          path: /tmp/ccache
+          key: ${{github.job}}-${{matrix.nametag}}-${{steps.ccache_cache_keys.outputs.date}}
+          restore-keys: ${{github.job}}-${{matrix.nametag}}-
+      - name: Build setup
+        run: |
+            ${{matrix.setenvs}}
+            src/build-scripts/ci-startup.bash
+      - name: Dependencies
+        run: |
+            ${{matrix.depcmds}}
+            src/build-scripts/gh-installdeps.bash
+      - name: Build
+        run: src/build-scripts/ci-build.bash
+      - name: Testsuite
+        if: matrix.skip_tests != '1'
+        run: src/build-scripts/ci-test.bash
+      - uses: actions/upload-artifact@3cea5372237819ed00197afe530f5a7ea3e805c8 # v3.1.0
+        if: failure()
+        with:
+          name: osl-${{github.job}}-${{matrix.nametag}}
+          path: |
+            build/cmake-save
+            build/*.cmake
+            build/CMake*
+            build/testsuite/*/*.*