show better zig/zls version mismatch messages (#917)

* show better zig/zls version mismatch messages

* always show message if versions don't match

* ignore patch

src/Server.zig

@@ -188,6 +188,12 @@ fn showMessage(
     args: anytype,
 ) void {
     const message = std.fmt.allocPrint(server.arena.allocator(), fmt, args) catch return;
+    switch (message_type) {
+        .Error => log.err("{s}", .{message}),
+        .Warning => log.warn("{s}", .{message}),
+        .Info => log.info("{s}", .{message}),
+        .Log => log.debug("{s}", .{message}),
+    }
     server.sendNotification("window/showMessage", types.ShowMessageParams{
         .type = message_type,
         .message = message,
@@ -1757,12 +1763,32 @@ fn initializeHandler(server: *Server, request: types.InitializeParams) Error!typ
         const env = configuration.getZigEnv(server.allocator, exe_path) orelse break :blk;
         defer std.json.parseFree(configuration.Env, env, .{ .allocator = server.allocator });
 
-        const zig_exe_version = std.SemanticVersion.parse(env.version) catch break :blk;
+        const zig_version = std.SemanticVersion.parse(env.version) catch break :blk;
+        const zls_version = comptime std.SemanticVersion.parse(build_options.version) catch unreachable;
 
-        if (zig_builtin.zig_version.order(zig_exe_version) == .gt) {
+        const zig_version_simple = std.SemanticVersion{
-            server.showMessage(.Warning,
+            .major = zig_version.major,
-                \\ZLS was built with Zig {}, but your Zig version is {s}. Update Zig to avoid unexpected behavior.
+            .minor = zig_version.minor,
-            , .{ zig_builtin.zig_version, env.version });
+            .patch = 0,
+        };
+        const zls_version_simple = std.SemanticVersion{
+            .major = zls_version.major,
+            .minor = zls_version.minor,
+            .patch = 0,
+        };
+
+        switch (zig_version_simple.order(zls_version_simple)) {
+            .lt => {
+                server.showMessage(.Warning,
+                    \\Zig `{}` is older than ZLS `{}`. Update Zig to avoid unexpected behavior.
+                , .{ zig_version, zls_version });
+            },
+            .eq => {},
+            .gt => {
+                server.showMessage(.Warning,
+                    \\Zig `{}` is newer than ZLS `{}`. Update ZLS to avoid unexpected behavior.
+                , .{ zig_version, zls_version });
+            },
         }
     } else {
         server.showMessage(.Warning,