improved formatting and code readability

qdls/Program.cs

@@ -1,42 +1,66 @@
 using System.IO;
 
+using Qdls;
+
+//	collect args; no args becomes working directory
 string[] arguments;
 if(args.Length == 0)
 	arguments = ["."];
 else
 	arguments = args;
+
+//	flags
+bool showHidden = true;
+
+//	run on targets
 foreach(var arg in arguments) {
+	//	don't try to list nonexistent entries or files
 	if(!Path.Exists(arg))
 		Console.WriteLine($"'{arg}: does not exist");
 	if(File.Exists(arg))
 		Console.WriteLine($"'{arg}: is file");
 
+	//	fetch children
 	var children = Directory.GetFileSystemEntries(arg);
 
-	var line = "";
+	//	state vars
+	var buffer = "";
 	var longest = children.OrderByDescending(s => Path.GetFileName(s).Length).First().Length;
 	var columns = Console.WindowWidth / (longest + 2);
+	var multiline = columns < args.Length;
 	var position = -1;
 
+	//	print names if more than one target
 	if(args.Length > 1)
 		Console.WriteLine($"{arg}:");
+	//	iterate over children; build buffer and output when full
 	foreach(var child in children) {
 		var name = Path.GetFileName(child);
 
-		if(
-			name.StartsWith('.') ||
-			( File.GetAttributes(child) & FileAttributes.Hidden ) == FileAttributes.Hidden
-		)
+		//	skip or format hidden files
+		if(Util.IsHidden(child))
+			if(showHidden)
+				buffer += Format.Hidden;
+			else
 				continue;
 
-		if(++position >= columns) {
+		//	format directories
+		if(Directory.Exists(child))
+			buffer += Format.Directory;
+
+		//	if we pass max width, write buffer and clear
+		if( multiline && (++position > columns) ) {
 			position = -1;
-			Console.WriteLine(line);
-			line = "";
+			Console.WriteLine(buffer);
+			buffer = "";
 		}
-		line += name + "  ";
+		if(multiline)
+			buffer += $"{name}{Format.Reset}".PadRight(longest) + "  ";
+		else
+			buffer += $"{name}{Format.Reset}  ";
 
 	}
 
-	Console.WriteLine(line);
+	//	print last line
+	Console.WriteLine(buffer);
 }

qdls/Util.cs

@@ -0,0 +1,24 @@
+namespace Qdls;
+
+using System.IO;
+
+public static class Util {
+
+	public static bool IsHidden(string path) {
+		var name = Path.GetFileName(path);
+		return
+			name.StartsWith('.') ||
+			( File.GetAttributes(path) & FileAttributes.Hidden ) == FileAttributes.Hidden;
+	}
+
+}
+
+public static class Format {
+
+	public const string Reset		= "\x1b[0m";	//	reset
+	public const string Hidden		= "\x1b[2;3m";	//	faint + italic
+	public const string Executable	= "\x1b[1;32m";	//	bold + green
+	public const string Directory	= "\x1b[1;34m";	//	bold + blue
+
+}
+