python-package-conda-cache.yml

name: Python Package with caching

# taken from https://github.com/epassaro/cache-conda-envs

# cancel any previous running or pending jobs from the same branch
concurrency:
  group: python-package-conda-cache-${{ github.head_ref }}
  cancel-in-progress: true

on:
  push:
    branches:
      - '*'
  pull_request:
    branches:
      - '*'
  schedule:
    - cron: '0 0 * * 1'
  workflow_dispatch:

env:
  CACHE_NUMBER: 0  # increase to reset cache manually

jobs:
  build:

    strategy:
      matrix:
        include:
          - os: ubuntu-latest
            label: linux-64
            prefix: /usr/share/miniconda3/envs/my-env

    name: ${{ matrix.label }}
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v2

      - name: Setup Miniforge
        uses: conda-incubator/setup-miniconda@v2
        with:
            miniforge-version: latest
            activate-environment: my-env

      - name: Set cache date
        run: echo "DATE=$(date +'%Y%m%d')" >> $GITHUB_ENV

      - uses: actions/cache@v2
        with:
          path: ${{ matrix.prefix }}
          key: ${{ matrix.label }}-conda-${{ hashFiles('environment.yml') }}-${{ env.DATE }}-${{ env.CACHE_NUMBER }}
        id: cache

      - name: Update environment
        run: conda env update -n my-env -f environment.yml
        if: steps.cache.outputs.cache-hit != 'true'

      - name: Run tests
        shell: bash -l {0}
        run: pytest ./tests