name: Build Customised Caddy

on:
  workflow_dispatch:
    inputs:
      caddy_version:
        description: 'Specify Caddy version (e.g., latest, v2.8.4)'
        required: true
        default: 'latest'
      caddy_plugin:
        description: 'Comma-separated plugin module paths, e.g. github.com/caddy-dns/cloudflare, github.com/caddyserver/nginx-adapter. Leave empty to build vanilla Caddy.'
        required: false

jobs:
  build-caddy:
    runs-on: ubuntu-latest
    steps:
      - name: Initialise Go environment
        uses: actions/setup-go@v5
        with:
          go-version: '1.22'
          check-latest: true

      - name: Install xcaddy programme
        run: go install github.com/caddyserver/xcaddy/cmd/xcaddy@latest

      - name: Compile customised Caddy binary
        run: |
          PLUGIN_ARGS=""
          IFS=',' read -ra PLUGINS <<< "${{ inputs.caddy_plugin }}"
          for PLUGIN in "${PLUGINS[@]}"; do
            PLUGIN="${PLUGIN// /}"
            if [ -n "$PLUGIN" ]; then
              PLUGIN_ARGS="$PLUGIN_ARGS --with $PLUGIN"
            fi
          done
          xcaddy build ${{ inputs.caddy_version }} $PLUGIN_ARGS

      - name: Upload compiled artefact
        uses: actions/upload-artifact@v3
        with:
          name: caddy-custom-linux-amd64
          path: caddy