gcc.yml

name: GCC Linux Build
on: [push, pull_request, workflow_dispatch]

# Use custom shell with -l so .bash_profile is sourced
# without having to do it in manually every step
defaults:
  run:
    shell: bash -leo pipefail {0}

env:
  cache_key: gcc
  CC: gcc-10
  FC: gfortran-10
  CXX: g++-10

# The jobs are split into:
# 1. a dependency build step (setup), and
# 2. a GSI build step (gsi)
# The setup is run once and the environment is cached,
# so each subsequent build of GSI can reuse the cached dependencies to save time (and compute).

jobs:
  setup:
    runs-on: ubuntu-latest

    steps:
      # Checkout the GSI to get the ci/spack.yaml file
      - name: checkout
        if: steps.cache-env.outputs.cache-hit != 'true'
        uses: actions/checkout@v4
        with:
            path: gsi

      # Cache spack, compiler and dependencies
      - name: cache-env
        id: cache-env
        uses: actions/cache@v3
        with:
          path: |
            spack
            ~/.spack
          key: spack-${{ runner.os }}-${{ env.cache_key }}-${{ hashFiles('gsi/ci/spack.yaml') }}

      # Install dependencies using Spack
      - name: install-dependencies-with-spack
        if: steps.cache-env.outputs.cache-hit != 'true'
        run: |
          sudo apt-get install cmake
          git clone -c feature.manyFiles=true https://github.com/JCSDA/spack.git
          source spack/share/spack/setup-env.sh
          spack env create gsi-env gsi/ci/spack.yaml
          spack env activate gsi-env
          spack compiler find
          sudo apt install cmake
          spack external find
          spack add mpich@3.4.2
          spack concretize
          spack install -v --fail-fast --dirty
          spack clean -a

  gsi:
    needs: setup
    runs-on: ubuntu-latest

    steps:
      - name: checkout
        uses: actions/checkout@v4
        with:
            path: gsi

      - name: cache-env
        id: cache-env
        uses: actions/cache@v3
        with:
          path: |
            spack
            ~/.spack
          key: spack-${{ runner.os }}-${{ env.cache_key }}-${{ hashFiles('gsi/ci/spack.yaml') }}

      - name: build
        run: |
          source spack/share/spack/setup-env.sh
          spack env activate gsi-env
          cd gsi
          mkdir -p build && cd build
          cmake -DCMAKE_INSTALL_PREFIX=../install -DGSI_MODE=Regional -DENKF_MODE=GFS -DBUILD_REG_TESTING=OFF ..
          make -j2 VERBOSE=1
          make install
        env:
          CC: mpicc
          FC: mpif90