109 lines
4.4 KiB
TypeScript
109 lines
4.4 KiB
TypeScript
import { lookpath } from 'lookpath';
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import { homedir, platform } from 'os';
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import * as lc from 'vscode-languageclient';
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import { window, workspace } from 'vscode';
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import { Config } from './config';
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import { Highlighter } from './highlighting';
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function expandPathResolving(path: string) {
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if (path.startsWith('~/')) {
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return path.replace('~', homedir());
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}
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return path;
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}
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export class Server {
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public static highlighter = new Highlighter();
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public static config = new Config();
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public static client: lc.LanguageClient;
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public static async start(
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notificationHandlers: Iterable<[string, lc.GenericNotificationHandler]>
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) {
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// '.' Is the fallback if no folder is open
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// TODO?: Workspace folders support Uri's (eg: file://test.txt). It might be a good idea to test if the uri points to a file.
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let folder: string = '.';
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if (workspace.workspaceFolders !== undefined) {
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folder = workspace.workspaceFolders[0].uri.fsPath.toString();
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}
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const command = expandPathResolving(this.config.raLspServerPath);
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// FIXME: remove check when the following issue is fixed:
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// https://github.com/otiai10/lookpath/issues/4
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if (platform() !== 'win32') {
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if (!(await lookpath(command))) {
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throw new Error(
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`Cannot find rust-analyzer server \`${command}\` in PATH.`
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);
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}
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}
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const run: lc.Executable = {
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command,
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options: { cwd: folder }
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};
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const serverOptions: lc.ServerOptions = {
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run,
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debug: run
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};
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const traceOutputChannel = window.createOutputChannel(
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'Rust Analyzer Language Server Trace'
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);
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const clientOptions: lc.LanguageClientOptions = {
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documentSelector: [{ scheme: 'file', language: 'rust' }],
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initializationOptions: {
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publishDecorations: true,
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lruCapacity: Server.config.lruCapacity,
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maxInlayHintLength: Server.config.maxInlayHintLength,
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excludeGlobs: Server.config.excludeGlobs,
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useClientWatching: Server.config.useClientWatching,
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featureFlags: Server.config.featureFlags,
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withSysroot: Server.config.withSysroot
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},
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traceOutputChannel
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};
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Server.client = new lc.LanguageClient(
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'rust-analyzer',
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'Rust Analyzer Language Server',
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serverOptions,
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clientOptions
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);
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// HACK: This is an awful way of filtering out the decorations notifications
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// However, pending proper support, this is the most effecitve approach
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// Proper support for this would entail a change to vscode-languageclient to allow not notifying on certain messages
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// Or the ability to disable the serverside component of highlighting (but this means that to do tracing we need to disable hihlighting)
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// This also requires considering our settings strategy, which is work which needs doing
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// @ts-ignore The tracer is private to vscode-languageclient, but we need access to it to not log publishDecorations requests
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Server.client._tracer = {
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log: (messageOrDataObject: string | any, data?: string) => {
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if (typeof messageOrDataObject === 'string') {
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if (
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messageOrDataObject.includes(
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'rust-analyzer/publishDecorations'
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) ||
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messageOrDataObject.includes(
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'rust-analyzer/decorationsRequest'
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)
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) {
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// Don't log publish decorations requests
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} else {
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// @ts-ignore This is just a utility function
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Server.client.logTrace(messageOrDataObject, data);
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}
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} else {
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// @ts-ignore
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Server.client.logObjectTrace(messageOrDataObject);
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}
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}
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};
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Server.client.registerProposedFeatures();
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Server.client.onReady().then(() => {
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for (const [type, handler] of notificationHandlers) {
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Server.client.onNotification(type, handler);
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}
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});
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Server.client.start();
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}
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}
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