Add logic to build ubuntu .deb package using github actions.

Author: Kasper Peeters

.github/workflows/ubuntu-package.yml

@@ -0,0 +1,44 @@
+name: Linux
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-22.04
+    
+    steps:
+    - uses: actions/checkout@v3
+
+#    - name: Exit if not on devel branch
+#      if: github.ref != 'refs/heads/devel'
+#      run: exit 1
+      
+    - name: setup python
+      uses: actions/setup-python@v4
+      with:
+          python-version: 3.11
+
+    - name: get dependencies
+      run:  sudo apt-get update && sudo DEBIAN_FRONTEND=noninteractive apt-get install git cmake python3-dev g++ libpcre3 libpcre3-dev libgmp3-dev libgtkmm-3.0-dev libboost-all-dev libgmp-dev libsqlite3-dev uuid-dev libmpfr-dev libmpc-dev && python3 --version && which python3 && python3 -m pip install --upgrade pip && python3 -m pip install wheel && python3 -m pip install sympy gmpy2 numpy
+
+    - name: configure
+      run:  mkdir build && cd build && cmake -DPACKAGING_MODE=ON -DENABLE_MATHEMATICA=OFF -DCMAKE_INSTALL_PREFIX=/usr ..
+      
+    - name: make
+      run:  cd build && make
+      
+    - name: package
+      run:  cd build && cpack
+      
+    - name: Set version variables from output of cmake
+      run: |
+        VER=$(cat build/VERSION)
+        echo "VERSION=$VER" >> $GITHUB_ENV
+
+    - name: Upload artifact to github assets
+      uses: actions/upload-artifact@main
+      with:
+        name: cadabra2-${VERSION}-jammy.deb
+        path: build/cadabra2-${VERSION}-jammy.deb
+

CMakeLists.txt

@@ -74,6 +74,15 @@ message(STATUS "Build id '${CADABRA_VERSION_BUILD}' dated ${CADABRA_VERSION_DATE
 message(STATUS "Build mode is set to '${CMAKE_BUILD_TYPE}'")
 message(STATUS "Architecture is '${CMAKE_SYSTEM_PROCESSOR}}'")
 
+# Store the version number in a build/VERSION file (so that e.g. github
+# actions can pick it up).
+if(NOT "${CADABRA_VERSION_TWEAK}" STREQUAL "0")
+  file(WRITE build/VERSION       "${CADABRA_VERSION_MAJOR}.${CADABRA_VERSION_MINOR}.${CADABRA_VERSION_PATCH}.${CADABRA_VERSION_TWEAK}")
+else()
+  file(WRITE build/VERSION       "${CADABRA_VERSION_MAJOR}.${CADABRA_VERSION_MINOR}.${CADABRA_VERSION_PATCH}")
+endif()  
+
+
 # Notify about install directory
 if ("${CMAKE_INSTALL_PREFIX}" STREQUAL "")
 	message(STATUS "Install directory not set")