build.sh

#!/usr/bin/env bash
set -euo pipefail

cd "$(dirname "$0")"

GIT_HASH=$(git rev-parse --short HEAD 2>/dev/null || echo "unknown")

# Bundle TypeScript → single JS file
npx esbuild src/app.ts \
  --bundle \
  --minify \
  --target=es2022 \
  --format=iife \
  --define:"__GIT_HASH__=\"$GIT_HASH\"" \
  --define:"__BUILD_HASH__=\"building...\"" \
  --outfile=dist/app.js

# Inline JS into HTML using Python (avoids sed issues with special chars)
python3 -c "
import pathlib
html = pathlib.Path('src/index.html').read_text()
js = pathlib.Path('dist/app.js').read_text()
out = html.replace('<!-- APP_SCRIPT_PLACEHOLDER -->', f'<script>{js}</script>')
pathlib.Path('dist/signthat.html').write_text(out)
"

# Compute sha256
BUILD_HASH=$(sha256sum dist/signthat.html | cut -d' ' -f1)
SHORT_HASH="${BUILD_HASH:0:16}"

# Re-bundle with real build hash
npx esbuild src/app.ts \
  --bundle \
  --minify \
  --target=es2022 \
  --format=iife \
  --define:"__GIT_HASH__=\"$GIT_HASH\"" \
  --define:"__BUILD_HASH__=\"$SHORT_HASH\"" \
  --outfile=dist/app.js

# Re-inline
python3 -c "
import pathlib
html = pathlib.Path('src/index.html').read_text()
js = pathlib.Path('dist/app.js').read_text()
out = html.replace('<!-- APP_SCRIPT_PLACEHOLDER -->', f'<script>{js}</script>')
pathlib.Path('dist/signthat.html').write_text(out)
"

FINAL_HASH=$(sha256sum dist/signthat.html | cut -d' ' -f1)

echo ""
echo "Built: dist/signthat.html"
echo "Git:   $GIT_HASH"
echo "SHA256: $FINAL_HASH"
echo "Size:  $(wc -c < dist/signthat.html) bytes"