ci: use emsdk instead of download emsdk each build.

.drone.yml

@@ -4,12 +4,16 @@ type: docker
 name: default
 
 steps:
+  - name: build-wasm
+    image: emscripten/emsdk:3.0.0
+    commands:
+      - ./scripts/build-wasm.sh
+
   - name: build
     image: node:16.18-bullseye
     commands:
       - apt-get update
-      - apt-get install -y cmake jq zip
+      - apt-get install -y jq zip
-      - ./scripts/build-wasm.sh
       - npm ci
       - npm run test
       - ./scripts/build-and-package.sh legacy

src/KgmWasm/build-wasm

@@ -11,18 +11,20 @@ if [ -z "$BUILD_TYPE" ]; then
   BUILD_TYPE=Release
 fi
 
-mkdir -p build/wasm
+# CI: already had emsdk installed.
-if [ ! -d ../../build/emsdk ]; then
+if ! command -v emcc; then
+  if [ ! -d ../../build/emsdk ]; then
     git clone https://github.com/emscripten-core/emsdk.git ../../build/emsdk
+  fi
+
+  pushd ../../build/emsdk
+  ./emsdk install 3.0.0
+  ./emsdk activate 3.0.0
+  source ./emsdk_env.sh
+  popd # ../../build/emsdk
 fi
 
-pushd ../../build/emsdk
+mkdir -p build/wasm
-#git pull
-./emsdk install 3.0.0
-./emsdk activate 3.0.0
-source ./emsdk_env.sh
-popd # ../../build/emsdk
-
 pushd build/wasm
 emcmake cmake -DCMAKE_BUILD_TYPE="$BUILD_TYPE" ../..
 make -j

src/QmcWasm/build-wasm

@@ -11,17 +11,20 @@ if [ -z "$BUILD_TYPE" ]; then
   BUILD_TYPE=Release
 fi
 
-mkdir -p build/wasm
+# CI: already had emsdk installed.
-if [ ! -d ../../build/emsdk ]; then
+if ! command -v emcc; then
+  if [ ! -d ../../build/emsdk ]; then
     git clone https://github.com/emscripten-core/emsdk.git ../../build/emsdk
+  fi
+
+  pushd ../../build/emsdk
+  ./emsdk install 3.0.0
+  ./emsdk activate 3.0.0
+  source ./emsdk_env.sh
+  popd # ../../build/emsdk
 fi
 
-pushd ../../build/emsdk
+mkdir -p build/wasm
-./emsdk install 3.0.0
-./emsdk activate 3.0.0
-source ./emsdk_env.sh
-popd # ../../build/emsdk
-
 pushd build/wasm
 emcmake cmake -DCMAKE_BUILD_TYPE="$BUILD_TYPE" ../..
 make -j