name: ci

on:
  push:
    branches:
      - develop
      - releases/**
  pull_request:
    branches:
      - develop
      - releases/**

concurrency:
  group: ci-${{github.ref}}-${{github.event.pull_request.number || github.run_number}}
  cancel-in-progress: true

jobs:
  prechecks:
    needs: [ changes ]
    uses: ./.github/workflows/valid-style.yml
    with:
      with_coverage: ${{ needs.changes.outputs.with_coverage }}
  audit-ancient-python:
    uses: ./.github/workflows/audit.yaml
    needs: [ changes ]
    with:
      with_coverage: ${{ needs.changes.outputs.with_coverage }}
      python_version: 2.7
  all-prechecks:
    needs: [ prechecks ]
    runs-on: ubuntu-latest
    steps:
    - name: Success
      run: "true"
  # Check which files have been updated by the PR
  changes:
    runs-on: ubuntu-latest
      # Set job outputs to values from filter step
    outputs:
      bootstrap: ${{ steps.filter.outputs.bootstrap }}
      core: ${{ steps.filter.outputs.core }}
      packages: ${{ steps.filter.outputs.packages }}
      with_coverage: ${{ steps.coverage.outputs.with_coverage }}
    steps:
      - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # @v2
        if: ${{ github.event_name == 'push' }}
        with:
          fetch-depth: 0
            # For pull requests it's not necessary to checkout the code
      - uses: dorny/paths-filter@b2feaf19c27470162a626bd6fa8438ae5b263721
        id: filter
        with:
          # See https://github.com/dorny/paths-filter/issues/56 for the syntax used below
          # Don't run if we only modified packages in the
          # built-in repository or documentation
          filters: |
            bootstrap:
            - '!var/spack/repos/builtin/**'
            - 'var/spack/repos/builtin/packages/clingo-bootstrap/**'
            - 'var/spack/repos/builtin/packages/clingo/**'
            - 'var/spack/repos/builtin/packages/python/**'
            - 'var/spack/repos/builtin/packages/re2c/**'
            - '!lib/spack/docs/**'
            - 'lib/spack/**'
            - 'share/spack/**'
            - '.github/workflows/bootstrap.yml'
            core:
            - '!lib/spack/docs/**'
            - './!(var/**)/**'
            packages:
            - 'var/**'
      # Some links for easier reference:
      #
      # "github" context: https://docs.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions#github-context
      # job outputs: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idoutputs
      # setting environment variables from earlier steps: https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable
      #
      - id: coverage
        # Run the subsequent jobs with coverage if core has been modified,
        # regardless of whether this is a pull request or a push to a branch
        run: |
          echo Core changes: ${{ steps.filter.outputs.core }}
          echo Event name: ${{ github.event_name }}
          if [ "${{ steps.filter.outputs.core }}" == "true" ]
          then
            echo "::set-output name=with_coverage::true"
          else
            echo "::set-output name=with_coverage::false"
          fi
  bootstrap:
    if: ${{ github.repository == 'spack/spack' && needs.changes.outputs.bootstrap == 'true' }}
    needs: [ prechecks, changes ]
    uses: ./.github/workflows/bootstrap.yml
  unit-tests:
    if: ${{ github.repository == 'spack/spack' && needs.changes.outputs.core == 'true' }}
    needs: [ prechecks, changes ]
    uses: ./.github/workflows/unit_tests.yaml
    with:
      core: ${{ needs.changes.outputs.core }}
      packages: ${{ needs.changes.outputs.packages }}
      with_coverage: ${{ needs.changes.outputs.with_coverage }}
  windows:
    if: ${{ github.repository == 'spack/spack' && needs.changes.outputs.core == 'true' }}
    needs: [ prechecks ]
    uses: ./.github/workflows/windows_python.yml
  all:
    needs: [ windows, unit-tests, bootstrap, audit-ancient-python ]
    runs-on: ubuntu-latest
    steps:
    - name: Success
      run: "true"