name: Tests

on:
  - push

jobs:
  tests:
    name: ${{ matrix.session }} ${{ matrix.python }} / ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - { python: "3.11", os: "ubuntu-latest", session: "pre-commit" }
          - { python: "3.11", os: "ubuntu-latest", session: "safety" }
          - { python: "3.12", os: "ubuntu-latest", session: "tests" }
          - { python: "3.11", os: "ubuntu-latest", session: "tests" }
          - { python: "3.10", os: "ubuntu-latest", session: "tests" }
          - { python: "3.9", os: "ubuntu-latest", session: "tests" }
          - { python: "3.8", os: "ubuntu-latest", session: "tests" }
          - { python: "3.11", os: "ubuntu-latest", session: "xdoctest" }
          - { python: "3.11", os: "ubuntu-latest", session: "docs-build" }

    env:
      NOXSESSION: ${{ matrix.session }}
      FORCE_COLOR: "1"
      PRE_COMMIT_COLOR: "always"

    steps:
      - name: Check out the repository
        uses: actions/checkout@v4

      - name: Set up Python ${{ matrix.python }}
        uses: actions/setup-python@v6.0.0
        with:
          python-version: ${{ matrix.python }}

      - name: Install needed tools
        run: |
          pip install --upgrade pip nox poetry virtualenv toml --constraint=.github/workflows/constraints.txt
          pip --version
          # separate out nox-poetry until it gets a released version with support for 1.8
          pip install --upgrade nox-poetry --constraint=.github/workflows/constraints.txt

      - name: Compute pre-commit cache key
        if: matrix.session == 'pre-commit'
        id: pre-commit-cache
        shell: python
        run: |
          import hashlib
          import sys
          import os

          python = "py{}.{}".format(*sys.version_info[:2])
          payload = sys.version.encode() + sys.executable.encode()
          digest = hashlib.sha256(payload).hexdigest()
          result = "${{ runner.os }}-{}-{}-pre-commit".format(python, digest[:8])

          with open(os.environ['GITHUB_OUTPUT'], 'a') as fh:
            fh.write(f"result={result}\n")

      - name: Restore pre-commit cache
        uses: actions/cache@v4.1.2
        if: matrix.session == 'pre-commit'
        with:
          path: ~/.cache/pre-commit
          key: ${{ steps.pre-commit-cache.outputs.result }}-${{ hashFiles('.pre-commit-config.yaml') }}
          restore-keys: |
            ${{ steps.pre-commit-cache.outputs.result }}-

      - name: Run Nox
        run: |
          nox --force-color --python=${{ matrix.python }}