Make build_js.sh non-interactive by switching to public emsdk bootstrap and removing submodule auth dependency

Author: wrkzdev

build_js.sh

@@ -5,28 +5,48 @@
 #
 # Please see the included LICENSE file for more information.
 
+set -euo pipefail
 
-# Set up emscripten
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+EMSDK_DIR="${ROOT_DIR}/emsdk"
+EMSDK_GIT_URL="https://github.com/emscripten-core/emsdk.git"
 
-if [[ -z "${EMSDK}" ]]; then
-  echo "Installing emscripten..."
-  echo ""
-  if [[ ! -e ./emsdk/emsdk ]]; then
-    git submodule init
-    git submodule update
+# Set up emscripten in a non-interactive way.
+# This avoids prompts such as:
+# "Username for 'https://github.com':"
+if ! command -v emconfigure >/dev/null 2>&1; then
+  if [[ -z "${EMSDK:-}" ]]; then
+    echo "Installing emscripten..."
+    echo ""
+
+    if [[ ! -x "${EMSDK_DIR}/emsdk" ]]; then
+      GIT_TERMINAL_PROMPT=0 git clone --depth 1 "${EMSDK_GIT_URL}" "${EMSDK_DIR}"
+    fi
+
+    pushd "${EMSDK_DIR}" >/dev/null
+    ./emsdk install latest
+    ./emsdk activate latest
+    # shellcheck disable=SC1091
+    source "${EMSDK_DIR}/emsdk_env.sh"
+    popd >/dev/null
+  else
+    # shellcheck disable=SC1091
+    source "${EMSDK}/emsdk_env.sh"
   fi
-  cd emsdk && git pull
-  ./emsdk install latest && ./emsdk activate latest
-  source ./emsdk_env.sh
-  cd ..
 fi
 
-# This applies a patch to fastcomp to make sure that the
-# environment is set correctly for react environments
-patch -N --verbose emsdk/fastcomp/emscripten/src/shell.js scripts/emscripten.patch
+# This patch only applies to old fastcomp layouts.
+if [[ -f "${EMSDK_DIR}/fastcomp/emscripten/src/shell.js" ]]; then
+  patch -N --verbose "${EMSDK_DIR}/fastcomp/emscripten/src/shell.js" "${ROOT_DIR}/scripts/emscripten.patch" || true
+fi
+
+mkdir -p "${ROOT_DIR}/dist"
+mkdir -p "${ROOT_DIR}/jsbuild"
+cd "${ROOT_DIR}/jsbuild"
+rm -rf *
 
-mkdir -p jsbuild && cd jsbuild && rm -rf *
 emconfigure cmake .. -DNO_AES=1 -DARCH=default -DBUILD_WASM=1 -DBUILD_JS=0
-make && cp wrkzcoin-crypto-wasm.js ../dist
+make && cp wrkzcoin-crypto-wasm.js "${ROOT_DIR}/dist"
+
 emconfigure cmake .. -DNO_AES=1 -DARCH=default -DBUILD_WASM=0 -DBUILD_JS=1
-make && cp wrkzcoin-crypto.js ../dist
+make && cp wrkzcoin-crypto.js "${ROOT_DIR}/dist"