---
name: _prepare
on:
  workflow_call:
    inputs:
      builder_ref:
        description: Git ref to checkout of build-emacs-for-macos
        required: false
        type: string
        default: ""
    outputs:
      builder_ref:
        description: Git ref of build-emacs-for-macos at builder_ref
        value: ${{ jobs.builder-sha.outputs.ref }}
      builder_sha:
        description: Git commit SHA of build-emacs-for-macos at builder_ref
        value: ${{ jobs.builder-sha.outputs.sha }}

jobs:
  builder-sha:
    runs-on: "macos-13"
    outputs:
      ref: ${{ steps.ref.outputs.ref }}
      sha: ${{ steps.sha.outputs.sha }}
    steps:
      - name: Default git ref check
        id: ref
        run: |
          DEFAULT_BUILDER_REF="v0.6.60"
          BUILDER_REF="${{ inputs.builder_ref }}"
          echo "ref=${BUILDER_REF:-$DEFAULT_BUILDER_REF}" >> "$GITHUB_OUTPUT"
      - name: Checkout build-emacs-for-macos repo
        uses: actions/checkout@v4
        with:
          repository: jimeh/build-emacs-for-macos
          ref: ${{ steps.ref.outputs.ref }}
      - name: Store builder Git SHA
        id: sha
        run: |
          BUILDER_SHA="$(git rev-parse HEAD)"
          echo "$BUILDER_SHA" > build-emacs-for-macos-git-sha.txt
          echo "sha=$BUILDER_SHA" >> "$GITHUB_OUTPUT"
          echo "Builder ref ${{ inputs.builder_ref }} resolved to" \
               "commit SHA: $BUILDER_SHA"
      - name: Upload builder git SHA artifact
        uses: actions/upload-artifact@v4
        with:
          name: build-emacs-for-macos-git-sha
          path: build-emacs-for-macos-git-sha.txt
          if-no-files-found: error

  emacs-builder:
    needs: [builder-sha]
    strategy:
      matrix:
        os:
          - macos-13 # Only macos-13 and earlier are x86_64.
          - macos-14 # Only macos-14 and later are ARM64.
    runs-on: ${{ matrix.os }}
    steps:
      - name: Cache emacs-builder (${{ runner.arch }})
        id: cache
        uses: actions/cache@v4
        with:
          path: bin/emacs-builder
          key: emacs-builder-${{ runner.arch }}-${{ needs.builder-sha.outputs.sha }}-bin
      - name: Checkout build-emacs-for-macos repo
        if: steps.cache.outputs.cache-hit != 'true'
        uses: actions/checkout@v4
        with:
          repository: jimeh/build-emacs-for-macos
          ref: ${{ needs.builder-sha.outputs.ref }}
          fetch-depth: 0
      - name: Setup Go
        if: steps.cache.outputs.cache-hit != 'true'
        uses: actions/setup-go@v5
        with:
          go-version: "1.23"
      - name: Build emacs-builder tool
        if: steps.cache.outputs.cache-hit != 'true'
        run: make build
      - name: Ensure emacs-builder is executable
        if: steps.cache.outputs.cache-hit != 'true'
        run: chmod +x bin/emacs-builder
      - run: bin/emacs-builder --version
      - name: Upload emacs-builder artifact
        uses: actions/upload-artifact@v4
        with:
          name: emacs-builder-${{ runner.arch }}
          path: bin/emacs-builder
          if-no-files-found: error