added lessw and updated README

README

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+This utility monitors a particular folder and compiles all the .less files into css and saves them in the target folder specified. It also preserves the folder structure inside the specified source folder and creates a similar folder structure inside your target folder. 
+
+USAGE 
+lessw SOURCE_DIR TARGET_DIR
+
+Use -x if you want your output CSS to be minified.

lessw

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+#!/usr/bin/env node
+
+var path = require('path'),
+	fs = require('fs'),
+	sys = require('sys'),
+	less = require('less');
+
+var directories = [],
+	files = [];
+
+if(process.argv.length < 4) {
+	sys.puts("USAGE lessw SRC_DIR TARGET_DIR -x(compress/optional)");
+	process.exit(1);
+}
+
+var args = process.argv.slice(2),
+	srcDir = args[0],
+	targetDir = args[1],
+	compress = (args[2] === '-x') ? true : false,
+	checkInterval = 1000;
+
+if(fs.statSync(srcDir).isDirectory() === false) {
+	sys.puts("Source ");
+	process.exit(1);
+}
+
+if(fs.statSync(targetDir).isDirectory() === false) {
+	sys.puts("Target should be a directory");
+	process.exit(1);
+}
+
+function writeFile(src) {
+	fs.readFile(src, 'utf-8', function (error, data) {
+		if(error) {
+			sys.puts("Error reading file : " + src + " : " + error.message);
+		} else {
+			var parser = new(less.Parser)({
+				paths : [path.dirname(src)],
+				filename : src
+			});
+			parser.parse(data, function (error, tree) {
+				if(error) {
+					less.writeError(error);
+				} else {
+					try {
+						var css = tree.toCSS({ compress : compress }),
+							outputFile = "",
+							baseDir = targetDir,
+							baseDirs = []; 
+
+						var base = path.dirname(src);
+						while(base !== srcDir) {
+							var temp = path.basename(base);
+							baseDirs.push(temp); 
+							outputFile = temp + "/"  + outputFile; 
+							base = path.dirname(base); 
+						} 
+
+						baseDirs.reverse();
+						baseDirs.forEach(function(dir) {
+							baseDir = path.join(baseDir, dir);
+							if(!path.existsSync(baseDir)) {
+								fs.mkdirSync(baseDir, 0777);
+							}
+						});
+
+						outputFile = path.join(targetDir, outputFile, path.basename(src, '.less') + ".css");
+						var fd = fs.openSync(outputFile, "w");
+						fs.writeSync(fd, css, 0);
+						sys.puts("Compiled file : " + path.basename(src) + " to " + outputFile);
+					} catch(ex) {
+						less.writeError(ex);
+					}
+				}
+			});
+		}
+	});
+}
+
+function compileFile(file) {
+	writeFile(file);
+	fs.watchFile(file, function (curr, prev) {
+		sys.puts(prev);
+		if(curr.mtime.getTime() !== prev.mtime.getTime()) {
+			writeFile(file);
+		}
+	});
+}	
+
+function findLessFiles(file, src) {
+	var fullPath = path.join(src, file);
+	if(fs.statSync(fullPath).isDirectory() === true) {
+		sys.puts("Found new directory : " + file);
+		var entry = { dir : fullPath };
+		directories.push(entry);
+		checkDirectory(entry);
+	} else {
+		if(path.extname(fullPath) === ".less") {
+			if(files.indexOf(fullPath) === -1) {
+				sys.puts("Found new file : " + file);
+				files.push(fullPath);	
+				compileFile(fullPath);
+			}
+		}	
+	}
+}	
+
+function checkDirectory (entry) {
+	var now = fs.statSync(entry.dir).mtime.getTime();
+	if(!entry.last || entry.last !== now) {
+		fs.readdirSync(entry.dir).forEach(function(file){
+			findLessFiles(file, entry.dir);
+		}); 
+	}
+	entry.last = now;
+}
+
+function checkDirectories () {
+	directories.forEach(checkDirectory);  
+}
+
+directories.push({ dir : srcDir });
+checkDirectories();
+setInterval(checkDirectories, checkInterval);