Add a log utility

src/log.zig

@@ -0,0 +1,24 @@
+const std = @import("std");
+
+pub const Log = enum {
+    const Self = @This();
+
+    Silent,
+    Error,
+    Info,
+    Debug,
+
+    var verbosity = Self.Error;
+
+    pub fn init(_verbosity: Self) void {
+        verbosity = _verbosity;
+    }
+
+    fn log(level: Self, comptime format: []const u8, args: var) void {
+        if (@enumToInt(level) <= @enumToInt(verbosity)) {
+            // TODO: log the time since start in the same format as wlroots
+            // TODO: use color if logging to a tty
+            std.debug.warn("[{}] " ++ format ++ "\n", .{@tagName(level)} ++ args);
+        }
+    }
+};

src/main.zig

@@ -1,12 +1,14 @@
 const std = @import("std");
 const c = @import("c.zig");
+const Log = @import("log.zig").Log;
 
 const Server = @import("server.zig").Server;
 
 pub fn main() !void {
-    std.debug.warn("Starting up.\n", .{});
+    Log.init(Log.Debug);
+    c.wlr_log_init(c.enum_wlr_log_importance.WLR_ERROR, null);
 
-    c.wlr_log_init(c.enum_wlr_log_importance.WLR_DEBUG, null);
+    Log.Info.log("Initializing server", .{});
 
     var server: Server = undefined;
     try server.init(std.heap.c_allocator);
@@ -14,5 +16,7 @@ pub fn main() !void {
 
     try server.start();
 
+    Log.Info.log("Running server...", .{});
+
     server.run();
 }