Start of setting up CI with Github actions.

.github/workflows/develop.yml

@@ -0,0 +1,67 @@
+name: MicroHH-CI
+
+on:
+  push:
+    branches:
+      - develop_ci
+  pull_request:
+    branches:
+      - develop_ci
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        compiler: [gcc]
+
+    steps:
+      # Checkout the code
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+        with:
+          submodules: recursive
+
+      # Install dependencies
+      - name: Install dependencies
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -y gfortran fftw3 libfftw3-dev libnetcdf-dev \
+                                  libnetcdf-c++4 libnetcdf-c++4-dev cmake \
+                                  libboost-dev libopenmpi-dev openmpi-bin python3-pip
+          pip3 install --user numpy netcdf4
+
+      # Configure and build without MPI
+      - name: Configure and build (no MPI)
+        run: |
+          mkdir build_dp_cpu
+          cd build_dp_cpu
+          cmake -DSYST=ubuntu_20lts ..
+          make -j 4
+          cd ..
+
+      ## Configure and build without MPI, in SP
+      #- name: Configure and build (no MPI)
+      #  run: |
+      #    mkdir build_dp_cpu
+      #    cd build_dp_cpu
+      #    cmake -DSYST=ubuntu_20lts -DUSESP=true ..
+      #    make -j 4
+      #    cd ..
+
+      ## Configure and build with MPI
+      #- name: Configure and build (with MPI)
+      #  run: |
+      #    mkdir build_dp_cpumpi
+      #    cd build_dp_cpumpi
+      #    cmake -DSYST=ubuntu_20lts -DUSEMPI=true ..
+      #    make -j 4
+      #    cd ..
+
+      # Run tests
+      #- name: Run tests
+      #  run: |
+      #    cd cases
+      #    python3 run_travis.py
+

.gitignore

@@ -2,4 +2,3 @@
 .code-workspace.code-workspace
 .gitignore
 .vscode
-.*