Add tool to transpile JavaScript sources using Babel (#3009)

JerryScript-DCO-1.0-Signed-off-by: Daniella Barsony bella@inf.u-szeged.hu

tools/babel/scripts/transpile.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+# Copyright JS Foundation and other contributors, http://js.foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+if [[ "$#" -gt 2 || "$#" -lt 1 ]]; then
+  echo "Usage: $0 input [output]"
+  echo "* input: name of input directory/file"
+  echo "* output: name of output directory/file (same as input if not given)"
+  exit 1
+fi
+
+if [[ ! -d $1 && ! -f $1 ]]; then
+  echo "Error: $1 is not a file or directory"
+  exit 1
+fi
+
+FLAG='--out-file'
+if [[ -d $1 ]]; then
+  FLAG='--out-dir'
+fi
+
+if [[ "$#" -eq 1 ]]; then
+  ./node_modules/.bin/babel $1 $FLAG $1 --verbose
+else
+  ./node_modules/.bin/babel $1 $FLAG $2 --verbose
+fi