build: get rid of wget or curl, use npm pack instead (#586)

scripts/build.sh

@@ -15,10 +15,8 @@ build_frontend_from_source() {
 
 build_frontend() {
     local PACKAGE_NAME="visualdl"
-    local SRC=`npm view ${PACKAGE_NAME}@latest dist.tarball`
-    # wget $SRC -O "$BUILD_DIR/$PACKAGE_NAME.tar.gz"
-    curl -o "$BUILD_DIR/$PACKAGE_NAME.tar.gz" $SRC
-    tar zxf "$BUILD_DIR/$PACKAGE_NAME.tar.gz" -C "$BUILD_DIR"
+    local PACKAGE=`(cd $BUILD_DIR && npm pack ${PACKAGE_NAME}@latest)`
+    tar zxf "$BUILD_DIR/$PACKAGE" -C "$BUILD_DIR"
 }
 
 build_frontend_fake() {
@@ -49,7 +47,7 @@ clean_env() {
     rm -rf $BUILD_DIR/lib*
     rm -rf $BUILD_DIR/temp*
     rm -rf $BUILD_DIR/scripts*
-    rm -rf $BUILD_DIR/*.tar.gz
+    rm -rf $BUILD_DIR/*.tgz
     rm -rf $BUILD_DIR/package
 }