ci-pytest.yml

name: ci-pytest

on: pull_request

env:
  # Changing either of these two things will invalidate the cache and cause a full re-install
  # of ANTsPy and its dependencies
  # Update this hash whenever there is a change that affects ANTsPy libraries or dependencies
  # Updates or changes to the runner OS or arch will also invalidate the cache
  antspy_ref_hash: 'ff7413a5e7685b94ad7fc9a9b2553656f3bd005e'
  python_version: '3.9' # Python version to use for testing - update when needed

jobs:
  test:
    runs-on: ubuntu-22.04

    steps:
    - name: Setup Miniconda
      uses: conda-incubator/setup-miniconda@v3
      with:
        auto-update-conda: true
        python-version: ${{ env.python_version }}
        activate-environment: antspy-env

    - name: Load conda environment from cache if available
      id: cache-env
      uses: actions/cache@v4
      with:
        path: ~/conda-env.tar.gz
        key: ${{ runner.os }}-${{ runner.arch }}-conda-${{ env.python_version }}-${{ env.antspy_ref_hash }}

    - name: Unpack cached environment
      if: steps.cache-env.outputs.cache-hit == 'true'
      run: |
        tar -xzf ~/conda-env.tar.gz -C ${CONDA}/envs/antspy-env

    - name: Checkout ANTsPy at specific commit
      if: steps.cache-env.outputs.cache-hit != 'true'
      uses: actions/checkout@v4
      with:
        repository: ANTsX/ANTsPy
        ref: ${{ env.antspy_ref_hash }}
        token: ${{ secrets.GITHUB_TOKEN }}
        path: antspy-temp

    - name: Install dependencies and ANTsPy from commit
      if: steps.cache-env.outputs.cache-hit != 'true'
      run: |
        source $CONDA/etc/profile.d/conda.sh
        conda install -c conda-forge conda-pack
        conda create -n antspy-env python=${{ env.python_version }} -y
        conda activate antspy-env
        pip install ./antspy-temp
        # Pack the environment
        conda deactivate
        conda pack -n antspy-env -o ~/conda-env.tar.gz

    - name: Cache Conda environment
      if: steps.cache-env.outputs.cache-hit != 'true'
      uses: actions/cache@v4
      with:
        path: ~/conda-env.tar.gz
        key: ${{ runner.os }}-${{ runner.arch }}-conda-${{ env.python_version }}-${{ env.antspy_ref_hash }}

    - uses: actions/checkout@v4 # Checkout PR code to 'antspy-pr'
      with:
        path: antspy-pr

    - name: Replace installed ANTsPy with PR code
      run: |
        ANTS_SITE_PACKAGES=$(python -c "import os, ants; print(os.path.dirname(ants.__file__))")
        rm -rf $ANTS_SITE_PACKAGES/ants
        cp -r antspy-pr/ants $ANTS_SITE_PACKAGES/ants

    - name: Run tests
      run: |
        source $CONDA/etc/profile.d/conda.sh
        conda activate antspy-env
        bash antspy-pr/tests/run_tests.sh