feat(zlog): colored level text and styled timestamps and scopes

src/zlog.zig

@@ -16,8 +16,15 @@ fn logFn(
     // TODO: provide build time configuration to allow tweaking corresponding output
     // - change output file for writing messages to (default `stderr`)
     // write into own file for each level?
-    const level_txt = comptime message_level.asText();
-    const prefix = if (scope == .default) ": " else "(" ++ @tagName(scope) ++ "): ";
+
+    // TODO: make the level text colored according to the level!
+    const prefix = if (scope == .default) ": " else "(\x1b[2m" ++ @tagName(scope) ++ "\x1b[0m): ";
+    const level_txt = switch (comptime message_level) {
+        .err => "[\x1b[38;5;9merror\x1b[0m]",
+        .warn => "[\x1b[38;5;11mwarning\x1b[0m]",
+        .info => "[\x1b[38;5;10minfo\x1b[0m]",
+        .debug => "[\x1b[38;5;12mdebug\x1b[0m]",
+    };
     const fmt = level_txt ++ prefix ++ format ++ "\n";
     if (comptime build_options.file.len != 0) {
         // TODO: handle errors accordingly (i.e. panic?)
@@ -56,7 +63,7 @@ inline fn log_writing(writer: anytype, comptime fmt: []const u8, args: anytype)
 }
 
 inline fn log_timestamp(writer: anytype) void {
-    writer.print("[{any}] ", .{ztime.DateTime.now()}) catch return;
+    writer.print("[\x1b[1m{any}\x1b[0m] ", .{ztime.DateTime.now()}) catch return;
 }
 
 pub fn pretty_format(object: anytype, comptime fmt: []const u8, options: std.fmt.FormatOptions, writer: anytype) !void {