Add option to display version

Author: pwalig

README.md

@@ -5,8 +5,11 @@ bot client for [mini-RTS-game](https://github.com/pwalig/mini-RTS-server)
 ```
 git clone https://github.com/pwalig/mini-RTS-zig-bot.git
 cd mini-RTS-zig-bot
-zig build
+zig build -Doptimize=ReleaseSmall
 ```
+Optionally set `-Doptimize=ReleaseFast`.  
+`ReleaseSmall` is prefered due to fairly large delay between game ticks, meaning zig-bot does not need to be super performant.
+
 For information about installing zig see: https://ziglang.org/learn/getting-started/
 
 # Run

src/client.zig

@@ -82,7 +82,10 @@ pub const Client = struct {
             @intFromEnum(Message.Type.no) => {
                 if (self.state == State.Connected) {
                     const last = self.name.len - 1;
-                    if (self.name[last] == '~') return error.UnableToNameSelf;
+                    if (self.name[last] == '~') {
+                        try std.io.getStdOut().writer().print("unable to set a name\nlook into mini-rts-server .config file and make sure characters z, i, g, b, o, t are set as valid name characters or contact your mini-rts-server administrator\nalso make sure not too many zigbots are playing at the same time\n", .{});
+                        return error.UnableToNameSelf;
+                    }
                     self.name[last] += 1;
                     try self.send("n");
                     try self.send(&self.name);

src/main.zig

@@ -4,7 +4,7 @@ const print = std.debug.print;
 
 const Client = @import("client.zig").Client;
 
-const buffsize = 50;
+const version = "1.0.0";
 
 pub fn main() !void {
     var gpa = std.heap.GeneralPurposeAllocator(.{}){};
@@ -13,17 +13,22 @@ pub fn main() !void {
 
     var args = try std.process.ArgIterator.initWithAllocator(allocator);
     defer args.deinit();
-    // The first (0 index) Argument is the path to the program.
+
     const program_name = args.next() orelse "mini-RTS-zig-bot";
 
     const host_value = args.next() orelse {
-        print("usage {s} <host> <port> \n", .{program_name});
-        return error.NoPort;
+        print("no host name or ip address provided\nusage {s} <host> <port>\n", .{program_name});
+        return;
     };
 
+    if (std.mem.eql(u8, host_value, "--version") or std.mem.eql(u8, host_value, "-v")) {
+        try std.io.getStdOut().writer().print("{s}\n", .{version});
+        return;
+    }
+
     const port_value = args.next() orelse {
-        print("usage {s} <host> <port> \n", .{program_name});
-        return error.NoPort;
+        print("no port provided\nusage {s} <host> <port>\n", .{program_name});
+        return;
     };
     const port = try std.fmt.parseInt(u16, port_value, 10);