#!/bin/sh

SHA=$(git rev-parse --short HEAD)

# Build to a temporary file
bun build ./src/js/main.js \
            --outfile ./public/bundle.tmp.js \
            --target browser

# If bundle.js doesn't exist yet, fake it it
if [ ! -f ./public/bundle.js ]; then
    touch ./public/bundle.js
fi

# Strip version comments from both files and compare
tail -n +4 ./public/bundle.js > ./public/bundle.old.content.tmp
tail -n +1 ./public/bundle.tmp.js > ./public/bundle.new.content.tmp

if ! cmp -s ./public/bundle.old.content.tmp ./public/bundle.new.content.tmp; then
    printf "////\n// version: %s\n\n" "$SHA" | cat - ./public/bundle.tmp.js > ./public/bundle.js
fi

rm ./public/bundle.tmp.js ./public/bundle.old.content.tmp ./public/bundle.new.content.tmp