name: Grove

on:
  workflow_run: # https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_run
    workflows: [CI]
    types: [completed]

permissions:
  pull-requests: write

jobs:
  grove-build:
    runs-on: ubuntu-latest
    if: github.event.workflow_run.conclusion == 'success' && github.repository == 'leanprover/lean4'

    steps:
      - name: Retrieve information about the original workflow
        uses: potiuk/get-workflow-origin@v1_1 # https://github.com/marketplace/actions/get-workflow-origin
        # This action is deprecated and archived, but it seems hard to find a
        # better solution for getting the PR number
        # see https://github.com/orgs/community/discussions/25220 for some discussion
        id: workflow-info
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          sourceRunId: ${{ github.event.workflow_run.id }}

      - name: Check if should run
        id: should-run
        run: |
          # Check if it's a push to master (no PR number and target branch is master)
          if [ -z "${{ steps.workflow-info.outputs.pullRequestNumber }}" ]; then
            if [ "${{ github.event.workflow_run.head_branch }}" = "master" ]; then
              echo "Push to master detected. Skipping for now, to be enabled later."
              echo "should-run=false" >> "$GITHUB_OUTPUT"
            else
              echo "Push to non-master branch, skipping"
              echo "should-run=false" >> "$GITHUB_OUTPUT"
            fi
          else
            # Check if it's a PR with grove label
            PR_LABELS='${{ steps.workflow-info.outputs.pullRequestLabels }}'
            if echo "$PR_LABELS" | grep -q '"grove"'; then
              echo "PR with grove label detected"
              echo "should-run=true" >> "$GITHUB_OUTPUT"
            else
              echo "PR without grove label, skipping"
              echo "should-run=false" >> "$GITHUB_OUTPUT"
            fi
          fi

      - name: Fetch upstream invalidated facts
        if: ${{ steps.should-run.outputs.should-run == 'true' && steps.workflow-info.outputs.pullRequestNumber != '' }}
        id: fetch-upstream
        uses: TwoFx/grove-action/fetch-upstream@v0.3
        with:
          artifact-name: grove-invalidated-facts
          base-ref: master

      - name: Download toolchain for this commit
        if: ${{ steps.should-run.outputs.should-run == 'true' }}
        id: download-toolchain
        uses: dawidd6/action-download-artifact@v11
        with:
          commit: ${{ steps.workflow-info.outputs.sourceHeadSha }}
          workflow: ci.yml
          path: artifacts
          name: build-Linux.*
          name_is_regexp: true

      - name: Unpack toolchain
        if: ${{ steps.should-run.outputs.should-run == 'true' }}
        id: unpack-toolchain
        run: |
          cd artifacts
          # Find the tar.zst file
          TAR_FILE=$(find . -name "lean-*.tar.zst" -type f | head -1)
          if [ -z "$TAR_FILE" ]; then
            echo "Error: No lean-*.tar.zst file found"
            exit 1
          fi
          echo "Found archive: $TAR_FILE"

          # Extract the archive
          tar --zstd -xf "$TAR_FILE"

          # Find the extracted directory name
          LEAN_DIR=$(find . -maxdepth 1 -name "lean-*" -type d | head -1)
          if [ -z "$LEAN_DIR" ]; then
            echo "Error: No lean-* directory found after extraction"
            exit 1
          fi
          echo "Extracted directory: $LEAN_DIR"
          echo "lean-dir=$LEAN_DIR" >> "$GITHUB_OUTPUT"

      - name: Build
        if: ${{ steps.should-run.outputs.should-run == 'true' }}
        id: build
        uses: TwoFx/grove-action/build@v0.3
        with:
          project-path: doc/std/grove
          script-name: grove-stdlib
          invalidated-facts-artifact-name: grove-invalidated-facts
          comment-artifact-name: grove-comment
          toolchain-id: lean4
          toolchain-path: artifacts/${{ steps.unpack-toolchain.outputs.lean-dir }}
          project-ref: ${{ steps.workflow-info.outputs.sourceHeadSha }}

      # deploy-alias computes a URL component for the PR preview. This
      # is so we can have a stable name to use for feedback on draft
      # material.
      - id: deploy-alias
        if: ${{ steps.should-run.outputs.should-run == 'true' }}
        uses: actions/github-script@v7
        name: Compute Alias
        with:
          result-encoding: string
          script: |
            if (process.env.PR) {
                return `pr-${process.env.PR}`
            } else {
                return 'deploy-preview-main';
            }
        env:
          PR: ${{ steps.workflow-info.outputs.pullRequestNumber }}

      - name: Deploy to Netlify
        if: ${{ steps.should-run.outputs.should-run == 'true' }}
        id: deploy-draft
        uses: nwtgck/actions-netlify@v3.0
        with:
          publish-dir: ${{ steps.build.outputs.out-path }}
          production-deploy: false
          github-token: ${{ secrets.GITHUB_TOKEN }}
          alias: ${{ steps.deploy-alias.outputs.result }}
          enable-commit-comment: false
          enable-pull-request-comment: false
          fails-without-credentials: true
          enable-github-deployment: false
          enable-commit-status: false
        env:
          NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
          NETLIFY_SITE_ID: "1cacfa39-a11c-467c-99e7-2e01d7b4089e"

      # actions-netlify cannot add deploy links to a PR because it assumes a
      # pull_request context, not a workflow_run context, see
      # https://github.com/nwtgck/actions-netlify/issues/545
      # We work around by using a comment to post the latest link
      - name: "Comment on PR with preview links"
        uses: marocchino/sticky-pull-request-comment@v2
        if: ${{ steps.should-run.outputs.should-run == 'true' && steps.workflow-info.outputs.pullRequestNumber != '' }}
        with:
          number: ${{ env.PR_NUMBER }}
          header: preview-comment
          recreate: true
          message: |
            [Grove](${{ steps.deploy-draft.outputs.deploy-url }}) for revision ${{ steps.workflow-info.outputs.sourceHeadSha }}.

            ${{ steps.build.outputs.comment-text }}
        env:
          PR_NUMBER: ${{ steps.workflow-info.outputs.pullRequestNumber }}
          PR_HEADSHA: ${{ steps.workflow-info.outputs.sourceHeadSha }}