name: Build Site

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - "**"
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  site:
    name: Next.js Build
    runs-on: namespace-profile-linux-medium
    env:
      NIX_CONFIG: |
        experimental-features = nix-command flakes
        accept-flake-config = true
    steps:
      - name: Checkout
        uses: https://code.forgejo.org/actions/checkout@v4
        with:
          token: ${{ github.token }}
          fetch-depth: 0

      - name: Prepare Cache Dirs
        shell: bash
        run: |
          set -euo pipefail
          cache_root="${NSC_CACHE_PATH:-${HOME}/.cache/burrow}"
          shared_root="${NSC_SHARED_CACHE_PATH:-${cache_root}/shared}"
          lane_root="${NSC_LANE_CACHE_PATH:-${cache_root}/lane/build-site}"
          mkdir -p \
            "${shared_root}/npm" \
            "${shared_root}/xdg" \
            "${lane_root}/next-cache"
          echo "NPM_CONFIG_CACHE=${shared_root}/npm" >> "${GITHUB_ENV}"
          echo "XDG_CACHE_HOME=${shared_root}/xdg" >> "${GITHUB_ENV}"
          echo "NEXT_CACHE_DIR=${lane_root}/next-cache" >> "${GITHUB_ENV}"
          {
            echo 'NIX_CONFIG<<EOF'
            printf '%s\n' "${NIX_CONFIG}"
            echo 'EOF'
          } >> "${GITHUB_ENV}"
          df -h /nix "${shared_root}" "${lane_root}" || true

      - name: Build
        shell: bash
        run: |
          set -euo pipefail
          nix develop .#ci -c bash -euo pipefail -c '
            mkdir -p site/.next
            rm -rf site/.next/cache
            ln -sfn "${NEXT_CACHE_DIR}" site/.next/cache
            cd site
            npm install
            npm run build
          '