build: Add CMake build

.github/workflows/cmake.yml

@@ -0,0 +1,120 @@
+# inspired by "build GDAL library and to run test with CMake"
+# from https://github.com/OSGeo/gdal/blob/master/.github/workflows/cmake_builds.yml
+
+---
+name: CMake
+
+on:
+    push:
+        paths-ignore:
+            - 'doc/**'
+        branches:
+            - main
+            - releasebranch_*
+    pull_request:
+        paths-ignore:
+            - 'doc/**'
+
+concurrency:
+    group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+    cancel-in-progress: true
+
+env:
+    CMAKE_UNITY_BUILD: OFF
+
+permissions:
+    contents: read  #  to fetch code (actions/checkout)
+
+jobs:
+
+    build-cmake:
+        runs-on: ubuntu-20.04
+        env:
+            CMAKE_OPTIONS: -DPython_LOOKUP_VERSION=3.8 -DUSE_CCACHE=ON
+            cache-name: cmake-ubuntu-20.04
+        steps:
+            - name: Checkout GRASS
+              uses: actions/[email protected]
+            - name: Setup cache
+              uses: actions/[email protected]
+              id: cache
+              with:
+                  path: ${{ github.workspace }}/.ccache
+                  key: "${{ env.cache-name }}-${{ runner.os }}-${{ github.base_ref }}\
+                        ${{ github.ref_name }}-${{ github.run_id }}"
+                  restore-keys: |
+                    ${{ env.cache-name }}-${{ runner.os }}-${{ github.base_ref }}
+                    ${{ env.cache-name }}-${{ runner.os }}
+            - name: Install CMake 3.16.0
+              run: |
+                cd ${GITHUB_WORKSPACE}
+                wget https://github.com/Kitware/CMake/releases/download/v3.16.0/cmake-3.16.0-Linux-x86_64.tar.gz
+                tar xzf cmake-3.16.0-Linux-x86_64.tar.gz
+                echo "CMAKE_DIR=$GITHUB_WORKSPACE/cmake-3.16.0-Linux-x86_64/bin" >> $GITHUB_ENV
+                echo "$GITHUB_WORKSPACE/cmake-3.16.0-Linux-x86_64/bin" >> $GITHUB_PATH
+            - run: |
+                cmake --version
+            - name: Install dependencies
+              run: |
+                sudo add-apt-repository -y ppa:ubuntugis/ubuntugis-unstable
+                sudo apt-get update
+                sudo apt-get install -y -q build-essential \
+                 flex make bison gcc libgcc1 g++ ccache \
+                 python3 python3-dev \
+                 python3-opengl python3-wxgtk4.0 \
+                 python3-dateutil libgsl-dev python3-numpy \
+                 wx3.0-headers wx-common libwxgtk3.0-gtk3-dev \
+                 libwxbase3.0-dev libbz2-dev zlib1g-dev gettext \
+                 libtiff5-dev libpnglite-dev libcairo2 libcairo2-dev \
+                 sqlite3 libsqlite3-dev \
+                 libpq-dev libreadline6-dev libfreetype6-dev \
+                 libfftw3-3 libfftw3-dev \
+                 libboost-thread-dev libboost-program-options-dev libpdal-dev\
+                 subversion libzstd-dev checkinstall \
+                 libglu1-mesa-dev libxmu-dev \
+                 ghostscript wget -y make ccache g++
+            - run: python -m pip install ninja
+            - name: Configure ccache
+              run: |
+                  echo CCACHE_BASEDIR=$PWD >> ${GITHUB_ENV}
+                  echo CCACHE_DIR=$PWD/.ccache >> ${GITHUB_ENV}
+                  echo CCACHE_MAXSIZE=250M >> ${GITHUB_ENV}
+                  ccache -z
+              working-directory: ${{ github.workspace }}
+            - name: Print build environment variables
+              shell: bash -el {0}
+              run: |
+                printenv | sort
+                gcc --version
+                ldd --version
+            - name: Create installation directory
+              run: |
+                mkdir $HOME/install
+            - name: Configure
+              run: |
+                cmake ${CMAKE_OPTIONS} -S $GITHUB_WORKSPACE -B $GITHUB_WORKSPACE/build -G Ninja \
+                  -DCMAKE_INSTALL_PREFIX=$HOME/install -DWITH_NLS=OFF \
+                  -DCMAKE_C_FLAGS="-I/usr/include -I/usr/include/gdal" \
+                  -DCMAKE_CXX_FLAGS="-I/usr/include -I/usr/include/gdal"
+            - name: Print CMakeCache.txt
+              shell: bash -el {0}
+              run: |
+                cat ${GITHUB_WORKSPACE}/build/CMakeCache.txt
+            - name: Build
+              run: |
+                cmake --build build --verbose -j$(nproc)
+            - name: Install
+              run: |
+                cmake --install $GITHUB_WORKSPACE/build --verbose
+            - name: Add the bin directory to PATH
+              run: |
+                echo "$HOME/install/bin" >> $GITHUB_PATH
+            - name: Print installed versions
+              if: always()
+              run: .github/workflows/print_versions.sh
+            - name: Test executing of the grass command
+              run: .github/workflows/test_simple.sh
+            - name: Run tests
+              run: .github/workflows/test_thorough.sh --config .gunittest.cfg
+            - name: ccache statistics
+              run: ccache -s

.github/workflows/python-code-quality.yml

@@ -113,7 +113,7 @@
         run: |
           mkdir $HOME/install
 
       - name: Set number of cores for compilation
         run: |
           echo "MAKEFLAGS=-j$(nproc)" >> $GITHUB_ENV
 
@@ -137,7 +137,7 @@
           export PYTHONPATH=`grass --config python_path`:$PYTHONPATH
           export LD_LIBRARY_PATH=$HOME/install/grass84/lib:$LD_LIBRARY_PATH
           cd gui/wxpython
-          pylint --persistent=no --py-version=${{ matrix.min-python-version }} --jobs=$(nproc) *
+          pylint --persistent=no --py-version=${{ matrix.min-python-version }} --jobs=$(nproc) --ignore=CMakeLists.txt *
 
       - name: Run Pylint on other files using pytest
         run: |

.gitignore

@@ -6,6 +6,8 @@ OBJ.*
 locale/scriptstrings/*
 bin.*/*
 dist.*/*
+.vs/*
+CMakeSettings.json
 config.log
 config.status*
 error.log
@@ -50,6 +52,7 @@ test_keyvalue_result.txt
 
 # ignore paths generated by helper tools
 node_modules
+
 include/VERSION_GIT
 
 # ignore autogenerated documentation
@@ -58,3 +61,6 @@ html/
 latex/
 lib/*/html/
 lib/*/latex/
+
+# ignore cmake build directory
+build