vendor

egui/scripts/build_demo_web.sh

@@ -0,0 +1,98 @@
+#!/usr/bin/env bash
+set -eu
+script_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
+cd "$script_path/.."
+
+CRATE_NAME="egui_demo_app"
+ # NOTE: persistence use up about 400kB (10%) of the WASM!
+FEATURES="glow,http,persistence,web_screen_reader"
+
+OPEN=false
+OPTIMIZE=false
+
+while test $# -gt 0; do
+  case "$1" in
+    -h|--help)
+      echo "build_demo_web.sh [--optimize] [--open]"
+      echo ""
+      echo "  --optimize: Enable optimization step"
+      echo "              Runs wasm-opt."
+      echo "              NOTE: --optimize also removes debug symbols which are otherwise useful for in-browser profiling."
+      echo ""
+      echo "  --open:     Open the result in a browser"
+      exit 0
+      ;;
+
+    -O|--optimize)
+      shift
+      OPTIMIZE=true
+      ;;
+
+    --open)
+      shift
+      OPEN=true
+      ;;
+
+    *)
+      break
+      ;;
+  esac
+done
+
+./scripts/setup_web.sh
+
+# This is required to enable the web_sys clipboard API which eframe web uses
+# https://rustwasm.github.io/wasm-bindgen/api/web_sys/struct.Clipboard.html
+# https://rustwasm.github.io/docs/wasm-bindgen/web-sys/unstable-apis.html
+export RUSTFLAGS=--cfg=web_sys_unstable_apis
+
+# Clear output from old stuff:
+rm -f "docs/${CRATE_NAME}_bg.wasm"
+
+echo "Building rust…"
+BUILD=release
+
+(cd crates/$CRATE_NAME &&
+  cargo build \
+    --release \
+    --lib \
+    --target wasm32-unknown-unknown \
+    --no-default-features \
+    --features ${FEATURES}
+)
+
+# Get the output directory (in the workspace it is in another location)
+TARGET=`cargo metadata --format-version=1 | jq --raw-output .target_directory`
+
+echo "Generating JS bindings for wasm…"
+TARGET_NAME="${CRATE_NAME}.wasm"
+WASM_PATH="${TARGET}/wasm32-unknown-unknown/$BUILD/$TARGET_NAME"
+wasm-bindgen "${WASM_PATH}" --out-dir docs --no-modules --no-typescript
+
+# if this fails with "error: cannot import from modules (`env`) with `--no-modules`", you can use:
+# wasm2wat target/wasm32-unknown-unknown/release/egui_demo_app.wasm | rg env
+# wasm2wat target/wasm32-unknown-unknown/release/egui_demo_app.wasm | rg "call .now\b" -B 20 # What calls `$now` (often a culprit)
+
+# to get wasm-strip:  apt/brew/dnf install wabt
+# wasm-strip docs/${CRATE_NAME}_bg.wasm
+
+if [[ "${OPTIMIZE}" = true ]]; then
+  echo "Optimizing wasm…"
+  # to get wasm-opt:  apt/brew/dnf install binaryen
+  wasm-opt "docs/${CRATE_NAME}_bg.wasm" -O2 --fast-math -o "docs/${CRATE_NAME}_bg.wasm" # add -g to get debug symbols
+fi
+
+echo "Finished docs/${CRATE_NAME}_bg.wasm"
+
+if [[ "${OPEN}" == true ]]; then
+  if [[ "$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