build_demo_web.sh: add --open as an option

build_demo_web.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 set -eu
 
+# Usage: build_demo_web.sh [--open]
+
 CRATE_NAME="egui_demo_app"
 
 # This is required to enable the web_sys clipboard API which egui_web uses
@@ -15,14 +17,12 @@ echo "Building rust…"
 BUILD=release
 FEATURES="http,persistence,screen_reader"
 
-(
-  cd egui_demo_app && cargo build \
-    -p ${CRATE_NAME} \
-    --release \
-    --lib \
-    --target wasm32-unknown-unknown \
-    --features ${FEATURES}
-)
+cargo build \
+  -p ${CRATE_NAME} \
+  --release \
+  --lib \
+  --target wasm32-unknown-unknown \
+  --features ${FEATURES}
 
 echo "Generating JS bindings for wasm…"
 TARGET_NAME="${CRATE_NAME}.wasm"
@@ -37,13 +37,15 @@ echo "Optimizing wasm…"
 wasm-opt docs/${CRATE_NAME}_bg.wasm -O2 --fast-math -o docs/${CRATE_NAME}_bg.wasm # add -g to get debug symbols
 echo "Finished docs/${CRATE_NAME}_bg.wasm"
 
-if [[ "$OSTYPE" == "linux-gnu"* ]]; then
-  # Linux, ex: Fedora
-  xdg-open http://localhost:8888/index.html
-elif [[ "$OSTYPE" == "msys" ]]; then
-  # Windows
-  start http://localhost:8888/index.html
-else
-  # Darwin/MacOS, or something else
-  open http://localhost:8888/index.html
+if [[ "${1:-}" == "--open" ]]; then
+  if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+    # Linux, ex: Fedora
+    xdg-open http://localhost:8888/index.html
+  elif [[ "$OSTYPE" == "msys" ]]; then
+    # Windows
+    start http://localhost:8888/index.html
+  else
+    # Darwin/MacOS, or something else
+    open http://localhost:8888/index.html
+  fi
 fi