workspace configuration server request model implemented!

src/Config.zig

@@ -9,10 +9,10 @@ enable_unused_variable_warnings: bool = false,
 /// Whether to enable import/embedFile argument completions (NOTE: these are triggered manually as updating the autotrigger characters may cause issues)
 enable_import_embedfile_argument_completions: bool = false,
 
-/// zig library path
+/// Zig library path
 zig_lib_path: ?[]const u8 = null,
 
-/// zig executable path used to run the custom build runner.
+/// Zig executable path used to run the custom build runner.
 /// May be used to find a lib path if none is provided.
 zig_exe_path: ?[]const u8 = null,
 
@@ -36,10 +36,11 @@ operator_completions: bool = true,
 include_at_in_builtins: bool = false,
 
 /// The detail field of completions is truncated to be no longer than this (in bytes).
-max_detail_length: usize = 1024 * 1024,
+max_detail_length: usize = 1048576,
 
 /// Skips references to std. This will improve lookup speeds.
 /// Going to definition however will continue to work
 skip_std_references: bool = false,
 
+/// Path to "builtin;" useful for debugging, automatically set if let null
 builtin_path: ?[]const u8 = null,

src/data/generate-vscode-config.js

@@ -0,0 +1,47 @@
+// Run with node
+
+const fs = require("fs");
+const path = require("path");
+
+const sourceOfTruth = fs.readFileSync(path.join(__dirname, "..", "Config.zig"));
+
+const lines = sourceOfTruth.toString().split("\n");
+
+function mapType(type) {
+    switch (type) {
+        case "?[]const u8":
+            return "string";
+
+        case "bool":
+            return "boolean";
+
+        case "usize":
+            return "integer";
+    
+        default:
+            throw new Error("unknown type!");
+    }
+}
+
+let comment = null;
+for (const line of lines) {
+    if (line.startsWith("///")) {
+        if (comment === null) comment = line.slice(3).trim();
+        else comment += line.slice(3);
+    } else if (comment) {
+        const name = line.split(":")[0].trim();
+        const type = line.split(":")[1].split("=")[0].trim();
+        const defaultValue = line.split(":")[1].split("=")[1].trim().replace(",","");
+        
+        // console.log(name, type, defaultValue);
+
+        console.log(`"zls.${name}": ${JSON.stringify({
+            "scope": "resource",
+            "type": mapType(type),
+            "description": comment,
+            "default": JSON.parse(defaultValue)
+        })},`);
+
+        comment = null;
+    }
+}

src/main.zig

@@ -91,6 +91,7 @@ const ClientCapabilities = struct {
     hover_supports_md: bool = false,
     completion_doc_supports_md: bool = false,
     label_details_support: bool = false,
+    supports_configuration: bool = false,
 };
 
 var client_capabilities = ClientCapabilities{};
@@ -1741,15 +1742,9 @@ fn initializeHandler(arena: *std.heap.ArenaAllocator, id: types.RequestId, req:
     });
 
     if (req.params.capabilities.workspace) |workspace| {
-        if (workspace.configuration.value) {
-            try send(arena, types.Request{
-                .method = "workspace/configuration",
-                .params = .{
-                    .ConfigurationParams = .{
-                        .items = &[_]types.ConfigurationParams.ConfigurationItem{},
-                    },
-                },
-            });
+        client_capabilities.supports_configuration = workspace.configuration.value;
+        if (workspace.didChangeConfiguration != null and workspace.didChangeConfiguration.?.dynamicRegistration.value) {
+            try registerCapability(arena, "workspace/didChangeConfiguration");
         }
     }
 
@@ -1758,6 +1753,69 @@ fn initializeHandler(arena: *std.heap.ArenaAllocator, id: types.RequestId, req:
     logger.info("Using offset encoding: {s}", .{std.meta.tagName(offset_encoding)});
 }
 
+fn registerCapability(arena: *std.heap.ArenaAllocator, method: []const u8) !void {
+    // NOTE: stage1 moment occurs if we dont do it like this :(
+    // long live stage2's not broken anon structs
+    logger.debug("Dynamically registering method '{s}'", .{method});
+
+    const id = try std.fmt.allocPrint(arena.allocator(), "register-{s}", .{method});
+    const reg = types.RegistrationParams.Registration{
+        .id = id,
+        .method = method,
+    };
+    const registrations = [1]types.RegistrationParams.Registration{reg};
+    const params = types.RegistrationParams{
+        .registrations = &registrations,
+    };
+
+    const respp = types.ResponseParams{
+        .RegistrationParams = params,
+    };
+
+    const req = types.Request{
+        .id = .{ .String = id },
+        .method = "client/registerCapability",
+        .params = respp,
+    };
+
+    std.log.info("AAAAA {s}", .{req});
+
+    try send(arena, req);
+}
+
+fn requestConfiguration(arena: *std.heap.ArenaAllocator) !void {
+    const configuration_items = comptime confi: {
+        var comp_confi: [std.meta.fields(Config).len]types.ConfigurationParams.ConfigurationItem = undefined;
+        inline for (std.meta.fields(Config)) |field, index| {
+            comp_confi[index] = .{
+                .scopeUri = "zls",
+                .section = "zls." ++ field.name,
+            };
+        }
+
+        break :confi comp_confi;
+    };
+
+    logger.info("Requesting configuration!", .{});
+    try send(arena, types.Request{
+        .id = .{ .String = "i_haz_configuration" },
+        .method = "workspace/configuration",
+        .params = .{
+            .ConfigurationParams = .{
+                .items = &configuration_items,
+            },
+        },
+    });
+}
+
+fn initializedHandler(arena: *std.heap.ArenaAllocator, id: types.RequestId, config: *const Config) !void {
+    _ = id;
+    _ = config;
+
+    if (client_capabilities.supports_configuration)
+        try requestConfiguration(arena);
+}
+
 var keep_running = true;
 fn shutdownHandler(arena: *std.heap.ArenaAllocator, id: types.RequestId, config: *const Config) !void {
     _ = config;
@@ -2121,18 +2179,22 @@ fn renameHandler(arena: *std.heap.ArenaAllocator, id: types.RequestId, req: requ
     }
 }
 
-fn didChangeConfigurationHandler(arena: *std.heap.ArenaAllocator, id: types.RequestId, req: requests.Configuration, config: *Config) !void {
+fn didChangeConfigurationHandler(arena: *std.heap.ArenaAllocator, id: types.RequestId, maybe_req: std.json.Value, config: *Config) !void {
     const tracy_zone = tracy.trace(@src());
     defer tracy_zone.end();
 
     _ = arena;
     _ = id;
-    inline for (std.meta.fields(Config)) |field| {
-        if (@field(req.params.settings, field.name)) |value| {
-            logger.debug("setting configuration option '{s}' to '{any}'", .{ field.name, value });
-            @field(config, field.name) = value;
+    if (maybe_req.Object.get("params").?.Object.get("settings").? == .Object) {
+        const req = try requests.fromDynamicTree(arena, requests.Configuration, maybe_req);
+        inline for (std.meta.fields(Config)) |field| {
+            if (@field(req.params.settings, field.name)) |value| {
+                logger.debug("setting configuration option '{s}' to '{any}'", .{ field.name, value });
+                @field(config, field.name) = value;
+            }
         }
-    }
+    } else if (client_capabilities.supports_configuration)
+        try requestConfiguration(arena);
 }
 
 fn referencesHandler(arena: *std.heap.ArenaAllocator, id: types.RequestId, req: requests.References, config: *const Config) !void {
@@ -2179,6 +2241,53 @@ fn processJsonRpc(arena: *std.heap.ArenaAllocator, parser: *std.json.Parser, jso
         else => types.RequestId{ .Integer = 0 },
     } else types.RequestId{ .Integer = 0 };
 
+    if (id == .String and std.mem.startsWith(u8, id.String, "register")) {
+        logger.info("INFO!!! {s}", .{json});
+        return;
+    }
+    if (id == .String and std.mem.eql(u8, id.String, "i_haz_configuration")) {
+        logger.info("Setting configuration...", .{});
+
+        // NOTE: Does this work with other editors?
+        // Yes, String ids are officially supported by LSP
+        // but not sure how standard this "standard" really is
+
+        const result = tree.root.Object.get("result").?.Array;
+
+        inline for (std.meta.fields(Config)) |field, index| {
+            const value = result.items[index];
+            const ft = if (@typeInfo(field.field_type) == .Optional)
+                @typeInfo(field.field_type).Optional.child
+            else
+                field.field_type;
+            const ti = @typeInfo(ft);
+
+            if (value != .Null) {
+                const new_value: field.field_type = switch (ft) {
+                    []const u8 => switch (value) {
+                        .String => |s| s,
+                        else => @panic("Invalid configuration value"), // TODO: Handle this
+                    },
+                    else => switch (ti) {
+                        .Int => switch (value) {
+                            .Integer => |s| std.math.cast(ft, s) orelse @panic("Invalid configuration value"),
+                            else => @panic("Invalid configuration value"), // TODO: Handle this
+                        },
+                        .Bool => switch (value) {
+                            .Bool => |b| b,
+                            else => @panic("Invalid configuration value"), // TODO: Handle this
+                        },
+                        else => @compileError("Not implemented for " ++ @typeName(ft)),
+                    },
+                };
+                logger.debug("setting configuration option '{s}' to '{any}'", .{ field.name, new_value });
+                @field(config, field.name) = new_value;
+            }
+        }
+
+        return;
+    }
+
     std.debug.assert(tree.root.Object.get("method") != null);
     const method = tree.root.Object.get("method").?.String;
 
@@ -2189,7 +2298,7 @@ fn processJsonRpc(arena: *std.heap.ArenaAllocator, parser: *std.json.Parser, jso
     }
 
     const method_map = .{
-        .{"initialized"},
+        .{ "initialized", void, initializedHandler },
         .{"$/cancelRequest"},
         .{"textDocument/willSave"},
         .{ "initialize", requests.Initialize, initializeHandler },
@@ -2210,7 +2319,7 @@ fn processJsonRpc(arena: *std.heap.ArenaAllocator, parser: *std.json.Parser, jso
         .{ "textDocument/formatting", requests.Formatting, formattingHandler },
         .{ "textDocument/rename", requests.Rename, renameHandler },
         .{ "textDocument/references", requests.References, referencesHandler },
-        .{ "workspace/didChangeConfiguration", requests.Configuration, didChangeConfigurationHandler },
+        .{ "workspace/didChangeConfiguration", std.json.Value, didChangeConfigurationHandler },
     };
 
     // Hack to avoid `return`ing in the inline for, which causes bugs.

src/requests.zig

@@ -148,6 +148,9 @@ pub const Initialize = struct {
     pub const ClientCapabilities = struct {
         workspace: ?struct {
             configuration: Default(bool, false),
+            didChangeConfiguration: ?struct {
+                dynamicRegistration: Default(bool, false), // NOTE: Should this be true? Seems like this critical feature should be nearly universal
+            },
             workspaceFolders: Default(bool, false),
         },
         textDocument: ?struct {

src/types.zig

@@ -44,6 +44,7 @@ pub const ResponseParams = union(enum) {
     WorkspaceEdit: WorkspaceEdit,
     InitializeResult: InitializeResult,
     ConfigurationParams: ConfigurationParams,
+    RegistrationParams: RegistrationParams,
 };
 
 /// JSONRPC notifications
@@ -77,6 +78,7 @@ pub const Response = struct {
 
 pub const Request = struct {
     jsonrpc: string = "2.0",
+    id: RequestId,
     method: []const u8,
     params: ?ResponseParams,
 };
@@ -400,3 +402,14 @@ pub const ConfigurationParams = struct {
         section: ?[]const u8,
     };
 };
+
+pub const RegistrationParams = struct {
+    registrations: []const Registration,
+
+    pub const Registration = struct {
+        id: string,
+        method: string,
+
+        // registerOptions?: LSPAny;
+    };
+};