######################################################################
# Unlike the main yml file this uses the LTS version of chezscheme,
# not the hirsute one. The main purpose is to make sure that
# `make bootstrap` does not rely on `__collect_safe`.
#
# Note that we are *not* running on ubuntu-latest so this needs manual
# upgrades if we want to jump on a newer github actions environment.
######################################################################

name: Bootstrap

on:
  push:
    paths:
      - 'bootstrap/idris2_app/idris2.ss'
      - '.github/workflows/ci-bootstrap.yml'
  pull_request:
    paths:
      - 'bootstrap/idris2_app/idris2.ss'
      - '.github/workflows/ci-bootstrap.yml'

jobs:

  initialise:
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout Project
        uses: actions/checkout@v4
        with:
          # for pull_request so we can do HEAD^2
          fetch-depth: 2

      - name: Get commit message
        id: get_commit_message
        run: |
          if   [[ '${{ github.event_name }}' == 'push' ]]; then
            echo "commit_message=$(git log --format=%B -n 1 HEAD | tr '\n' ' ')" >> "$GITHUB_OUTPUT"
          elif [[ '${{ github.event_name }}' == 'pull_request' ]]; then
            echo "commit_message=$(git log --format=%B -n 1 HEAD^2 | tr '\n' ' ')" >> "$GITHUB_OUTPUT"
          fi

    outputs:
      commit_message:
        echo "${{ steps.get_commit_message.outputs.commit_message }}"

  bootstrap:
    needs: initialise
    runs-on: ubuntu-20.04
    if: |
      !contains(needs.initialise.outputs.commit_message, '[ci: skip]')
    env:
      IDRIS2_CG: chez
      SCHEME: scheme
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Install build dependencies (LTS versions)
        run: |
          sudo apt-get update
          sudo apt-get install -y chezscheme
          echo "$HOME/.idris2/bin" >> "$GITHUB_PATH"
      - name: Build bootstrap
        run: make bootstrap