cleanup + git commit info

build.sh

@@ -4,3 +4,18 @@ wasm-pack build --target web --release --no-typescript
 wasm-opt -Oz -o pkg/integral_site_bg_2.wasm pkg/integral_site_bg.wasm
 mv pkg/integral_site_bg_2.wasm pkg/integral_site_bg.wasm
 llvm-strip --strip-all pkg/integral_site_bg.wasm
+
+rm -fr tmp | true #delete tmp folder if exists
+mkdir tmp tmp/pkg
+cp -r pkg/integral_site_bg.wasm pkg/integral_site.js tmp/pkg/
+cp www/index.html www/style.css tmp/
+
+sed -i 's/\.\.\/pkg/\.\/pkg/g' tmp/index.html
+
+git ls-files --exclude-standard --others . >/dev/null 2>&1; ec=$?
+if test "$ec" = 0; then
+    echo some untracked files
+elif test "$ec" = 1; then
+    commit=$(git rev-parse HEAD)
+    sed -i "s/let commit = ''/let commit = '${commit}'/g" tmp/index.html
+fi