Add workflow to test compatibility with newer C++ standards

.github/workflows/cppstd.yml

@@ -0,0 +1,206 @@
+# Copyright (C) 2024 Roberto Rossini (roberros@uio.no)
+# SPDX-License-Identifier: MIT
+
+name: Test compatibility with newer C++ standards
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - ".github/workflows/cppstd.yml"
+      - "cmake/**"
+      - "examples/**"
+      - "src/**"
+      - "test/scripts/**"
+      - "test/units/**"
+      - "CMakeLists.txt"
+      - "conanfile.py"
+    tags:
+      - "v*.*.*"
+
+  pull_request:
+    paths:
+      - ".github/workflows/cppstd.yml"
+      - "cmake/**"
+      - "examples/**"
+      - "src/**"
+      - "test/scripts/**"
+      - "test/units/**"
+      - "CMakeLists.txt"
+      - "conanfile.py"
+
+# https://stackoverflow.com/a/72408109
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+defaults:
+  run:
+    shell: bash
+
+env:
+  CCACHE_DIR: "/opt/ccache-cache"
+  CCACHE_COMPILERCHECK: "content"
+  CCACHE_COMPRESSLEVEL: "13"
+  CCACHE_MAXSIZE: "200M"
+  CONAN_HOME: "/opt/conan/"
+  HICTK_CI: "1"
+
+jobs:
+  build-deps:
+    runs-on: ubuntu-latest
+    name: Build dependencies
+    container:
+      image: ghcr.io/paulsengroup/ci-docker-images/ubuntu-24.04-cxx-clang-19
+      options: "--user=root"
+
+    outputs:
+      cache-key: ${{ steps.generate-cache-key.outputs.conan-key }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Fix permissions
+        run: |
+          chown -R $(id -u):$(id -g) $PWD
+
+      - name: Generate cache key
+        id: generate-cache-key
+        run: |
+          hash="${{ hashFiles('conanfile.py') }}"
+          echo "conan-key=packaging-$hash" >> $GITHUB_OUTPUT
+
+      - name: Restore Conan cache
+        id: cache-conan
+        uses: actions/cache/restore@v4
+        with:
+          key: ${{ steps.generate-cache-key.outputs.conan-key }}
+          path: ${{ env.CONAN_HOME }}
+
+      - name: Clean Conan cache (pre-build)
+        if: steps.cache-conan.outputs.cache-hit != 'true'
+        run: |
+          conan cache clean "*" --build
+          conan cache clean "*" --download
+          conan cache clean "*" --source
+          conan remove --confirm "*"
+
+      - name: Copy Conan settings
+        run: |
+          if [ ! -f "$CONAN_HOME/settings.yml" ]; then
+            cp "/root/.conan2/settings.yml" "$CONAN_HOME"
+          fi
+
+      - name: Install build dependencies (c++20)
+        run: |
+          conan install .                        \
+             --build=missing                     \
+             -pr:b="$CONAN_DEFAULT_PROFILE_PATH" \
+             -pr:h="$CONAN_DEFAULT_PROFILE_PATH" \
+             -s build_type=Debug                 \
+             -s compiler.libcxx=libstdc++11      \
+             -s compiler.cppstd=20
+
+      - name: Install build dependencies (c++23)
+        run: |
+          conan install .                        \
+             --build=missing                     \
+             -pr:b="$CONAN_DEFAULT_PROFILE_PATH" \
+             -pr:h="$CONAN_DEFAULT_PROFILE_PATH" \
+             -s build_type=Debug                 \
+             -s compiler.libcxx=libstdc++11      \
+             -s compiler.cppstd=23
+
+      - name: Clean Conan cache (post-build)
+        if: steps.cache-conan.outputs.cache-hit != 'true'
+        run: |
+          conan cache clean "*" --build
+          conan cache clean "*" --download
+          conan cache clean "*" --source
+
+      - name: Save Conan cache
+        uses: actions/cache/save@v4
+        if: steps.cache-conan.outputs.cache-hit != 'true'
+        with:
+          key: ${{ steps.generate-cache-key.outputs.conan-key }}
+          path: ${{ env.CONAN_HOME }}
+
+  build-project:
+    runs-on: ubuntu-latest
+    name: Build project
+    needs: [build-deps]
+    container:
+      image: ghcr.io/paulsengroup/ci-docker-images/ubuntu-24.04-cxx-clang-18
+      options: "--user=root"
+
+    strategy:
+      fail-fast: false
+      matrix:
+        cppstd:
+          - 20
+          - 23
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Fix permissions
+        run: |
+          chown -R $(id -u):$(id -g) $PWD
+
+      - name: Restore Conan cache
+        id: cache-conan
+        uses: actions/cache/restore@v4
+        with:
+          key: ${{ needs.build-deps.outputs.cache-key }}
+          path: ${{ env.CONAN_HOME }}
+          fail-on-cache-miss: true
+
+      - name: Install build dependencies
+        run: |
+          cppstd="${{ matrix.cppstd }}"
+          cppstd="${cppstd#c++}"
+
+          conan install .                              \
+             --build=missing                           \
+             -pr:b="$CONAN_DEFAULT_PROFILE_PATH"       \
+             -pr:h="$CONAN_DEFAULT_PROFILE_PATH"       \
+             -s build_type=Release                     \
+             -s compiler.libcxx=libstdc++11            \
+             -s compiler.cppstd="${{ matrix.cppstd }}" \
+             --output-folder=build
+
+      - name: Configure project
+        run: |
+          find src test \
+            -type f \
+            -name CMakeLists.txt \
+            -exec sed -i 's/set(CMAKE_CXX_STANDARD 17)/set(CMAKE_CXX_STANDARD ${{ matrix.cppstd }}/' {} +
+
+          cmake -DCMAKE_BUILD_TYPE=Debug \
+                -DCMAKE_PREFIX_PATH="$PWD/build" \
+                -DHICTK_ENABLE_TESTING=ON \
+                -DHICTK_ENABLE_FUZZY_TESTING=ON \
+                -DHICTK_BUILD_TOOLS=OFF \
+                -DHICTK_BUILD_EXAMPLES=ON \
+                -DHICTK_DOWNLOAD_TEST_DATASET=OFF \
+                -DHICTK_ENABLE_GIT_VERSION_TRACKING=OFF \
+                -S . \
+                -B build
+
+      - name: Build project
+        run: cmake --build build -j $(nproc)
+
+  cppstd-status-check:
+    name: Status Check (cppstd)
+    if: ${{ always() }}
+    runs-on: ubuntu-latest
+    needs:
+      - build-deps
+      - build-project
+
+    steps:
+      - name: Collect job results
+        if: |
+          needs.build-deps.result != 'success' ||
+          needs.build-project.result != 'success'
+        run: exit 1