Add colored console output

bin/js_features.js

@@ -7,6 +7,7 @@ var UglifyJS = require("../tools/node");
 var sys = require("util");
 var yargs = require("yargs");
 var fs = require("fs");
+var colors = require("colors");
 
 var ARGS = yargs
 	.usage("$0 input1.js \n")
@@ -37,23 +38,23 @@ if (ARGS.h || ARGS.help) {
 var files = ARGS._.slice();
 if (files.length > 1) {
 	sys.error("WARNING: expected only single input file. Processing file '" + files[0] + "' while the rest is ignored.");
-};
+}
 
 if (ARGS.features === true) {
 	sys.error("ERROR: empty set of features.");
 	process.exit(1);
-};
+}
 
 var features = ARGS.features.split(",");
 for (var i = 0; i < features.length; i++) {
 	if (features[i] != "FNAMES" && features[i] != "ASTREL" && features[i] != "FSCOPE") {
 		sys.error("WARNING: ignoring not supported feature '" + features[i] + "'.");
-	};
-};
+	}
+}
 
 for (var i = 0; i < files.length; i++) {
 	processFile(files[i], ARGS.print_ast, ARGS.features, ARGS.json_formatting, ARGS.skip_minified);
-};
+}
 
 function stripInterpreter(code){
 	if (code.slice(0,2) != "#!"){
@@ -69,14 +70,27 @@ function processFile(file, print_ast, features, json_formatting, skip_minified)
 		code = fs.readFileSync(file, "utf-8");
 	}
 	catch (ex) {
-		sys.error("ERROR: can't read file: " + file);
+		sys.error("ERROR:".red + " can't read file '" + file + "'");
 		return;
 	}
 
 	//if it is a script, the UglifyJS parser will fail to parse it
 	code = stripInterpreter(code);
-	
-	var output = UglifyJS.extractFeatures(code, file, print_ast, features, skip_minified);
+
+	try {
+		var output = UglifyJS.extractFeatures(code, file, print_ast, features, skip_minified);
+	} catch (ex){
+		if (ex instanceof UglifyJS.JS_Parse_Error){
+			sys.error("ERROR: ".red + "cannot parse file '" + file + "'");
+		} else if (ex instanceof  UglifyJS.JS_Minified_Error){
+			sys.error("WARN: ".yellow + "skipping minified file '" + file + "'");
+		} else {
+			sys.error("ERROR: ".red + "'" + file + "'" + e);
+		}
+
+		return;
+	}
+
 	if (output == null) {
 		return;
 	}
@@ -88,13 +102,17 @@ function processFile(file, print_ast, features, json_formatting, skip_minified)
 	//validate JSON	
     try {
         JSON.parse(output);
-    } catch (e) {    	
+    } catch (e) {
+		sys.error("ERROR: ".red + "output is not valid JSON " + "'" + file + "'");
         throw e;
     }
 
     if (removeWhitespace(output) != '{"query":[],"assign":[]}') {
     	console.log(output);
-    }
+		sys.error("OK: ".green + "'" + file + "'");
+    } else {
+		sys.error("EMPTY: ".yellow + "'" + file + "'");
+	}
 	
 }
 

lib/feature_extractor.js

@@ -58,14 +58,14 @@ function replaceMangled(code, file) {
 	return stream.toString();
 }
 
+function JS_Minified_Error(message) {
+	this.message = message;
+}
+
 function extractFeatures(code, file, print_ast, features, skip_minified) {
 	var toplevel;
-	try {
-		toplevel = parseFile(code, file);
-	} catch (e) {
-		console.warn("Cannot parse file: '%s'", file);
-		return null;
-	}
+
+	toplevel = parseFile(code, file);
 
 	extendAst(toplevel);
 
@@ -74,8 +74,9 @@ function extractFeatures(code, file, print_ast, features, skip_minified) {
 	}
 
 	if (skip_minified && isMinified(toplevel, code, file)){
-		console.warn("Skipping minified file: '%s'", file);
-		return null;
+		throw new JS_Minified_Error("Skipping minified file");
+		//console.warn("Skipping minified file: '%s'", file);
+		//return null;
 	}
 	
 	var feature_outputter = new FeatureJsonOutputter();

package.json

@@ -24,7 +24,8 @@
         "acorn": "~0.6.0",
         "escodegen": "~1.3.3",
         "esfuzz": "~0.3.1",
-        "estraverse": "~1.5.1"
+        "estraverse": "~1.5.1",
+        "colors": "~1.0.3"
     },
     "browserify": {
         "transform": [ "uglify-to-browserify" ]