const std = @import("std"); const headerPkg = @import("header"); const suffix = if (std.builtin.os.tag == .windows) ".exe" else ""; const allocator = std.heap.page_allocator; const initialize_msg = \\{"processId":6896,"clientInfo":{"name":"vscode","version":"1.46.1"},"rootPath":null,"rootUri":null,"capabilities":{"workspace":{"applyEdit":true,"workspaceEdit":{"documentChanges":true,"resourceOperations":["create","rename","delete"],"failureHandling":"textOnlyTransactional"},"didChangeConfiguration":{"dynamicRegistration":true},"didChangeWatchedFiles":{"dynamicRegistration":true},"symbol":{"dynamicRegistration":true,"symbolKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]},"tagSupport":{"valueSet":[1]}},"executeCommand":{"dynamicRegistration":true},"configuration":true,"workspaceFolders":true},"textDocument":{"publishDiagnostics":{"relatedInformation":true,"versionSupport":false,"tagSupport":{"valueSet":[1,2]},"complexDiagnosticCodeSupport":true},"synchronization":{"dynamicRegistration":true,"willSave":true,"willSaveWaitUntil":true,"didSave":true},"completion":{"dynamicRegistration":true,"contextSupport":true,"completionItem":{"snippetSupport":true,"commitCharactersSupport":true,"documentationFormat":["markdown","plaintext"],"deprecatedSupport":true,"preselectSupport":true,"tagSupport":{"valueSet":[1]},"insertReplaceSupport":true},"completionItemKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25]}},"hover":{"dynamicRegistration":true,"contentFormat":["markdown","plaintext"]},"signatureHelp":{"dynamicRegistration":true,"signatureInformation":{"documentationFormat":["markdown","plaintext"],"parameterInformation":{"labelOffsetSupport":true}},"contextSupport":true},"definition":{"dynamicRegistration":true,"linkSupport":true},"references":{"dynamicRegistration":true},"documentHighlight":{"dynamicRegistration":true},"documentSymbol":{"dynamicRegistration":true,"symbolKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]},"hierarchicalDocumentSymbolSupport":true,"tagSupport":{"valueSet":[1]}},"codeAction":{"dynamicRegistration":true,"isPreferredSupport":true,"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}}},"codeLens":{"dynamicRegistration":true},"formatting":{"dynamicRegistration":true},"rangeFormatting":{"dynamicRegistration":true},"onTypeFormatting":{"dynamicRegistration":true},"rename":{"dynamicRegistration":true,"prepareSupport":true},"documentLink":{"dynamicRegistration":true,"tooltipSupport":true},"typeDefinition":{"dynamicRegistration":true,"linkSupport":true},"implementation":{"dynamicRegistration":true,"linkSupport":true},"colorProvider":{"dynamicRegistration":true},"foldingRange":{"dynamicRegistration":true,"rangeLimit":5000,"lineFoldingOnly":true},"declaration":{"dynamicRegistration":true,"linkSupport":true},"selectionRange":{"dynamicRegistration":true},"semanticTokens":{"dynamicRegistration":true,"tokenTypes":["comment","keyword","number","regexp","operator","namespace","type","struct","class","interface","enum","typeParameter","function","member","macro","variable","parameter","property","label"],"tokenModifiers":["declaration","documentation","static","abstract","deprecated","readonly"]}},"window":{"workDoneProgress":true}},"trace":"off","workspaceFolders":[{"uri":"file://./tests", "name":"root"}]} ; const initialize_msg_offs = \\{"processId":6896,"clientInfo":{"name":"vscode","version":"1.46.1"},"rootPath":null,"rootUri":null,"capabilities":{"offsetEncoding":["utf-16", "utf-8"],"workspace":{"applyEdit":true,"workspaceEdit":{"documentChanges":true,"resourceOperations":["create","rename","delete"],"failureHandling":"textOnlyTransactional"},"didChangeConfiguration":{"dynamicRegistration":true},"didChangeWatchedFiles":{"dynamicRegistration":true},"symbol":{"dynamicRegistration":true,"symbolKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]},"tagSupport":{"valueSet":[1]}},"executeCommand":{"dynamicRegistration":true},"configuration":true,"workspaceFolders":true},"textDocument":{"publishDiagnostics":{"relatedInformation":true,"versionSupport":false,"tagSupport":{"valueSet":[1,2]},"complexDiagnosticCodeSupport":true},"synchronization":{"dynamicRegistration":true,"willSave":true,"willSaveWaitUntil":true,"didSave":true},"completion":{"dynamicRegistration":true,"contextSupport":true,"completionItem":{"snippetSupport":true,"commitCharactersSupport":true,"documentationFormat":["markdown","plaintext"],"deprecatedSupport":true,"preselectSupport":true,"tagSupport":{"valueSet":[1]},"insertReplaceSupport":true},"completionItemKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25]}},"hover":{"dynamicRegistration":true,"contentFormat":["markdown","plaintext"]},"signatureHelp":{"dynamicRegistration":true,"signatureInformation":{"documentationFormat":["markdown","plaintext"],"parameterInformation":{"labelOffsetSupport":true}},"contextSupport":true},"definition":{"dynamicRegistration":true,"linkSupport":true},"references":{"dynamicRegistration":true},"documentHighlight":{"dynamicRegistration":true},"documentSymbol":{"dynamicRegistration":true,"symbolKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]},"hierarchicalDocumentSymbolSupport":true,"tagSupport":{"valueSet":[1]}},"codeAction":{"dynamicRegistration":true,"isPreferredSupport":true,"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}}},"codeLens":{"dynamicRegistration":true},"formatting":{"dynamicRegistration":true},"rangeFormatting":{"dynamicRegistration":true},"onTypeFormatting":{"dynamicRegistration":true},"rename":{"dynamicRegistration":true,"prepareSupport":true},"documentLink":{"dynamicRegistration":true,"tooltipSupport":true},"typeDefinition":{"dynamicRegistration":true,"linkSupport":true},"implementation":{"dynamicRegistration":true,"linkSupport":true},"colorProvider":{"dynamicRegistration":true},"foldingRange":{"dynamicRegistration":true,"rangeLimit":5000,"lineFoldingOnly":true},"declaration":{"dynamicRegistration":true,"linkSupport":true},"selectionRange":{"dynamicRegistration":true},"semanticTokens":{"dynamicRegistration":true,"tokenTypes":["comment","keyword","number","regexp","operator","namespace","type","struct","class","interface","enum","typeParameter","function","member","macro","variable","parameter","property","label"],"tokenModifiers":["declaration","documentation","static","abstract","deprecated","readonly"]}},"window":{"workDoneProgress":true}},"trace":"off","workspaceFolders":null} ; const Server = struct { process: *std.ChildProcess, request_id: u32 = 1, fn start(initialization: []const u8, expect: ?[]const u8) !Server { var server = Server{ .process = try startZls() }; try server.request("initialize", initialization, expect); try server.request("initialized", "{}", null); return server; } fn request( self: *Server, method: []const u8, params: []const u8, expect: ?[]const u8, ) !void { self.request_id += 1; const req = try std.fmt.allocPrint(allocator, \\{{"jsonrpc":"2.0","id":{},"method":"{s}","params":{s}}} , .{ self.request_id, method, params }); const to_server = self.process.stdin.?.writer(); try to_server.print("Content-Length: {}\r\n\r\n", .{req.len}); try to_server.writeAll(req); const expected = expect orelse return; var from_server = self.process.stdout.?.reader(); while (true) { const header = headerPkg.readRequestHeader(allocator, from_server) catch |err| { switch (err) { error.EndOfStream => break, else => return err, } }; defer header.deinit(allocator); var resonse_bytes = try allocator.alloc(u8, header.content_length); defer allocator.free(resonse_bytes); if ((try from_server.readAll(resonse_bytes)) != header.content_length) { return error.InvalidResponse; } // std.debug.print("{s}\n", .{resonse_bytes}); const json_fmt = "{\"jsonrpc\":\"2.0\",\"id\":"; if (!std.mem.startsWith(u8, resonse_bytes, json_fmt)) { try extractError(resonse_bytes); continue; } const rest = resonse_bytes[json_fmt.len..]; const id_end = std.mem.indexOfScalar(u8, rest, ',') orelse return error.InvalidResponse; const id = try std.fmt.parseInt(u32, rest[0..id_end], 10); if (id != self.request_id) { continue; } const result = ",\"result\":"; const msg = rest[id_end + result.len .. rest.len - 1]; if (std.mem.eql(u8, msg, expected)) { return; } else { const mismatch = std.mem.indexOfDiff(u8, expected, msg) orelse 0; std.debug.print("==> Expected:\n{s}\n==> Got: (Mismatch in position {})\n{s}\n", .{ expected, mismatch, msg }); return error.InvalidResponse; } } } fn extractError(msg: []const u8) !void { const log_request = \\"method":"window/logMessage","params":{"type": ; if (std.mem.indexOf(u8, msg, log_request)) |log_msg| { const rest = msg[log_msg + log_request.len ..]; const level = rest[0]; if (level <= '2') { std.debug.print("{s}\n", .{rest[13 .. rest.len - 3]}); if (level <= '1') { return error.ServerError; } } } } fn shutdown(self: *Server) void { self.request("shutdown", "{}", null) catch @panic("Could not send shutdown request"); waitNoError(self.process) catch |err| @panic("Server error"); self.process.deinit(); } }; fn startZls() !*std.ChildProcess { std.debug.print("\n", .{}); var process = try std.ChildProcess.init(&[_][]const u8{"zig-cache/bin/zls" ++ suffix}, allocator); process.stdin_behavior = .Pipe; process.stdout_behavior = .Pipe; process.stderr_behavior = .Pipe; //std.ChildProcess.StdIo.Inherit; process.spawn() catch |err| { std.debug.print("Failed to spawn zls process, error: {}\n", .{err}); return err; }; return process; } fn waitNoError(process: *std.ChildProcess) !void { const stderr = std.io.getStdErr().writer(); const err_in = process.stderr.?.reader(); var buf: [4096]u8 = undefined; while (true) { const line = err_in.readUntilDelimiterOrEof(&buf, '\n') catch |err| switch (err) { error.StreamTooLong => { std.debug.print("skipping very long line\n", .{}); continue; }, else => return err, } orelse break; if (std.mem.startsWith(u8, line, "[debug")) continue; try stderr.writeAll(line); try stderr.writeByte('\n'); } const result = try process.wait(); switch (result) { .Exited => |code| if (code == 0) { return; }, else => {}, } return error.ShutdownWithError; } test "Open file, ask for semantic tokens" { var server = try Server.start(initialize_msg, null); defer server.shutdown(); try server.request("textDocument/didOpen", \\{"textDocument":{"uri":"file://./tests/test.zig","languageId":"zig","version":420,"text":"const std = @import(\"std\");"}} , null); try server.request("textDocument/semanticTokens/full", \\{"textDocument":{"uri":"file://./tests/test.zig"}} , \\{"data":[0,0,5,7,0,0,6,3,0,33,0,4,1,11,0,0,2,7,12,0,0,8,5,9,0]} ); } test "Request completion in an empty file" { var server = try Server.start(initialize_msg, null); defer server.shutdown(); try server.request("textDocument/didOpen", \\{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"file:///test.zig","languageId":"zig","version":420,"text":""}}} , null); try server.request("textDocument/completion", \\{"textDocument":{"uri":"file:///test.zig"}, "position":{"line":0,"character":0}} , null); } test "Request completion with no trailing whitespace" { var server = try Server.start(initialize_msg, null); defer server.shutdown(); try server.request("textDocument/didOpen", \\{"textDocument":{"uri":"file:///test.zig","languageId":"zig","version":420,"text":"const std = @import(\"std\");\nc"}} , null); try server.request("textDocument/completion", \\{"textDocument":{"uri":"file:///test.zig"}, "position":{"line":1,"character":1}} , \\{"isIncomplete":false,"items":[{"label":"std","kind":21,"textEdit":null,"filterText":null,"insertText":"std","insertTextFormat":1,"detail":"const std = @import(\"std\")","documentation":null}]} ); } test "Request utf-8 offset encoding" { var server = try Server.start(initialize_msg_offs, \\{"offsetEncoding":"utf-8","capabilities":{"signatureHelpProvider":{"triggerCharacters":["("],"retriggerCharacters":[","]},"textDocumentSync":1,"renameProvider":true,"completionProvider":{"resolveProvider":false,"triggerCharacters":[".",":","@"]},"documentHighlightProvider":false,"hoverProvider":true,"codeActionProvider":false,"declarationProvider":true,"definitionProvider":true,"typeDefinitionProvider":true,"implementationProvider":false,"referencesProvider":true,"documentSymbolProvider":true,"colorProvider":false,"documentFormattingProvider":true,"documentRangeFormattingProvider":false,"foldingRangeProvider":false,"selectionRangeProvider":false,"workspaceSymbolProvider":false,"rangeProvider":false,"documentProvider":true,"workspace":{"workspaceFolders":{"supported":false,"changeNotifications":false}},"semanticTokensProvider":{"full":true,"range":false,"legend":{"tokenTypes":["type","parameter","variable","enumMember","field","errorTag","function","keyword","comment","string","number","operator","builtin","label","keywordLiteral"],"tokenModifiers":["namespace","struct","enum","union","opaque","declaration","async","documentation","generic"]}}},"serverInfo":{"name":"zls","version":"0.1.0"}} ); server.shutdown(); }