name: pr

on:
  pull_request:

jobs:
  preview:
    runs-on: docker
    container:
      image: node:20
    steps:
      - uses: https://code.forgejo.org/actions/checkout@v3
      - name: lint
        run: |
          corepack enable
          pnpm install --frozen-lockfile
          pnpm run lint:remark
          pnpm run lint:prettier
      - name: get forgejo.org and move the docs
        run: |
          git clone --recursive --depth 1 https://codeberg.org/forgejo/website/ /tmp/website
          apt-get update -qq && apt-get install -qq -y rsync
          rsync -av --delete ./ /tmp/website/forgejo-docs/${{ env.GITHUB_BASE_REF }}/
      - name: install
        run: |
          cd /tmp/website
          corepack enable
          pnpm install --frozen-lockfile
      - name: preview
        if: ${{ secrets.WEBSITETOKEN != '' }}
        run: |
          cd /tmp/website
          colon=':'
          branch=docs_pull_${{ env.GITHUB_REF_NAME }}
          sed -i.orig -e "s|origin$colon '.*|origin$colon 'https$colon//forgejo.codeberg.page',|" -e "s|basePathname$colon '/'|basePathname$colon '/@$branch//'|" src/config.mjs
          cat src/config.mjs
          corepack enable
          pnpm run build
          git clone https://forgejo-website:${{ secrets.WEBSITETOKEN }}@codeberg.org/forgejo/pages /tmp/pages
          git -C /tmp/pages switch -C $branch
          mv /tmp/pages/.git dist
          cd dist
          git config user.email "ci@forgejo.org" ; git config user.name "forgejo-website"
          git add .
          git diff-index --quiet HEAD || git commit -m 'publish' -a
          remote_branch_present=$(git show-branch refs/remotes/origin/$branch 2>/dev/null || true)
          git push --force origin $branch

          # Add PR comment with preview links on PR which were not already deployed
          if [ ! "$remote_branch_present" ]; then
            echo -n '{"body": "Preview ready: https://forgejo.codeberg.page/@'"$branch"'/' > comment.json

            # Add link to 5 first pages with more than 100 changes
            # awk is actually mawk, which does not support regex interval {n,m}
            git diff --stat origin/main | awk '/\.html *\| *[0-9][0-9][0-9]+ [+-]*$/ { print $3, $1 }' | sort -rn | head -n5 | cut -d" " -f2 | sed 's/index\.html//' | sed 's#^#\\\\nhttps://forgejo.codeberg.page/@'"$branch"'/#' | tr -d '\n' >> comment.json
            echo '"}' >> comment.json

            # Post PR comment
            curl -d @comment.json -H "Content-Type: application/json" -X POST "https://forgejo-website:${{ secrets.WEBSITETOKEN }}@codeberg.org/api/v1/repos/forgejo/docs/issues/${{ env.GITHUB_REF_NAME }}/comments"
          fi