Introduce polyglot magic to choose execution language dynamically

hpi-swa · Apr 30, 2019 · ea2a0ef · ea2a0ef
1 parent 2eeac5c
commit ea2a0ef
Showing 1 changed file with 27 additions and 3 deletions.
diff --git a/lib/kernel.js b/lib/kernel.js
@@ -107,8 +107,32 @@ process.on("SIGINT", function() {
 });
 
 
-function polyglotirize(rawCode) {
-    return `Polyglot.eval('python', '${rawCode}')`;
+function polygloterize(rawCode) {
+    const rawCodeLines = rawCode.split('\n');
+    if(rawCodeLines.length < 2) {
+        return rawCode;
+    }
+
+    const firstLine = rawCodeLines[0]
+    const otherLines = rawCodeLines.slice(1)
+
+    if(!firstLine.startsWith('%polyglot ')) {
+        return rawCode;
+    }
+
+    const languageIdentifier = firstLine.split(' ')[1]
+
+    return `
+        try {
+            Polyglot.eval(
+                '${languageIdentifier}',
+                '${otherLines.join('\n')}'
+            );
+        } catch(e) {
+            console.error('An error occured while trying to execute Polyglot code:');
+            console.error(e);
+        }
+    `
 }
 
 /**
@@ -125,7 +149,7 @@ function parseCommandArguments() {
         startupCallback: function() {
             log("startupCallback:", this.startupCallback);
         },
-        transpile: polyglotirize,
+        transpile: polygloterize,
     };
 
     var usage = (