#!/usr/bin/env bash
# Build a single-file Mermaid + ELK layout bundle (IIFE setting window.mermaid with the ELK layout loaders
# registered) for scripts/build_atlas_html.py and scripts/render_check.py.
# Usage: build_mermaid_bundle.sh [output.js]   (needs node + npm; network access for npm install)
set -euo pipefail
OUT="$(realpath -m "${1:-mermaid-elk.bundle.js}")"
WORK="$(mktemp -d)"
cd "$WORK"
npm init -y >/dev/null
npm install --silent mermaid @mermaid-js/layout-elk esbuild
cat > entry.js <<'EOF'
import mermaid from 'mermaid';
import elkLayouts from '@mermaid-js/layout-elk';
mermaid.registerLayoutLoaders(elkLayouts);
window.mermaid = mermaid;
EOF
node node_modules/esbuild/install.js >/dev/null 2>&1 || true   # some npm configs block postinstall; fetch the binary explicitly
./node_modules/.bin/esbuild entry.js --bundle --format=iife --minify --outfile="$OUT"
echo "mermaid $(node -p "require('mermaid/package.json').version") + layout-elk $(node -p "require('@mermaid-js/layout-elk/package.json').version") -> $OUT"