Permission denied - fix

pom.xml

@@ -6,7 +6,7 @@
 
   <groupId>io.github.wniemiec-io-java</groupId>
   <artifactId>babel-transpiler</artifactId>
-  <version>1.0.1</version>
+  <version>1.0.2</version>
   <name>Babel transpiler</name>
   <description>Babel transcription for JavaScript files.</description>
   <url>https://github.com/wniemiec-io-java/babel-transpiler</url>
@@ -68,6 +68,12 @@
       <artifactId>jar-file-manager</artifactId>
       <version>LATEST</version>
     </dependency>
+
+    <dependency>
+      <groupId>commons-io</groupId>
+      <artifactId>commons-io</artifactId>
+      <version>2.11.0</version>
+    </dependency>
   </dependencies>
 
   <build>

src/main/java/wniemiec/io/java/BabelTranspiler.java

@@ -13,6 +13,7 @@
 import java.nio.file.Path;
 import java.util.List;
 import java.util.function.Consumer;
+import org.apache.commons.io.FileUtils;
 
 
 /**
@@ -73,7 +74,7 @@ public List<String> fromCode(List<String> code) throws IOException {
         }
 
         setUpTerminal();
-        setUpBabelLocation();
+        setUpBabel();
         setUpTempInputFile(code);
         setUpTempOutputFile();
         runBabel(tempFileInput);
@@ -117,8 +118,46 @@ private Path createTempOutFile() throws IOException {
         return createTempJsFile("outputJsCode");
     }
 
+    private void setUpBabel() throws IOException {
+        setUpBabelLocation();
+        compileBabel();
+    }
+
     private void setUpBabelLocation() throws IOException {
-        babelLocation = babelScript.getLocation();
+        babelLocation = buildBabelTemporaryDirectory();
+
+        copyBabelToTempDirectory();
+    }
+
+    private void copyBabelToTempDirectory() throws IOException {
+        FileUtils.copyDirectory(babelScript.getLocation().toFile(), babelLocation.toFile());
+    }
+
+    private void compileBabel() throws IOException {
+        cleanBabel();
+
+        terminal.exec(
+            "npm",
+            "install",
+            "--prefix",
+            babelLocation.toAbsolutePath().toString()
+        );
+    }
+
+    private void cleanBabel() throws IOException {
+        FileUtils.deleteDirectory(getBabelBinLocation().toFile());
+    }
+
+    private Path getBabelBinLocation() {
+        return babelLocation.resolve("node_modules").resolve(".bin");
+    }
+
+    private Path buildBabelTemporaryDirectory() {
+        return getTemporaryDirectory().resolve(babelScript.getFolderName());
+    }
+
+    private Path getTemporaryDirectory() {
+        return Path.of(System.getProperty("java.io.tmpdir"));
     }
 
     private void runBabel(Path jsFile) throws IOException {

src/main/java/wniemiec/io/java/BabelTranspilerScript.java

@@ -15,11 +15,24 @@ class BabelTranspilerScript {
     //		Attributes
     //-------------------------------------------------------------------------
     private Path location;
+    private static final String FOLDER_NAME;
+
+
+    //-------------------------------------------------------------------------
+    //		Initialization block
+    //-------------------------------------------------------------------------
+    static {
+        FOLDER_NAME = "babel";
+    }
 
 
     //-------------------------------------------------------------------------
     //		Getters
     //-------------------------------------------------------------------------
+    public String getFolderName() {
+        return FOLDER_NAME;
+    }
+
     public Path getLocation() throws IOException {
         if (location == null) {
             location = initializeLocation();
@@ -33,7 +46,7 @@ private Path initializeLocation() throws IOException {
 
         return baseDir
             .resolve("javascript")
-            .resolve("babel");
+            .resolve(FOLDER_NAME);
     }
 
     private static Path buildBaseDir() throws IOException {

src/main/javascript/babel/ex.js

@@ -0,0 +1,14 @@
+class Pen {
+    constructor(name, color, price){
+        this.name = name;
+        this.color = color; 
+        this.price = price;
+    }
+
+    showPrice(){
+        console.log(`Price of ${this.name} is ${this.price}`);
+    }
+}
+
+const pen1 = new Pen("Marker", "Blue", "$3");
+pen1.showPrice();