1 import * as vscode from 'vscode';
2 import * as path from "path";
3 import * as os from "os";
4 import { promises as fs, PathLike } from "fs";
6 import * as commands from './commands';
7 import { activateInlayHints } from './inlay_hints';
8 import { Ctx } from './ctx';
9 import { Config, NIGHTLY_TAG } from './config';
10 import { log, assert, isValidExecutable } from './util';
11 import { PersistentState } from './persistent_state';
12 import { fetchRelease, download } from './net';
13 import { activateTaskProvider } from './tasks';
14 import { setContextValue } from './util';
15 import { exec } from 'child_process';
17 let ctx: Ctx | undefined;
19 const RUST_PROJECT_CONTEXT_NAME = "inRustProject";
21 export async function activate(context: vscode.ExtensionContext) {
22 // For some reason vscode not always shows pop-up error notifications
23 // when an extension fails to activate, so we do it explicitly by ourselves.
24 // FIXME: remove this bit of code once vscode fixes this issue: https://github.com/microsoft/vscode/issues/101242
25 await tryActivate(context).catch(err => {
26 void vscode.window.showErrorMessage(`Cannot activate rust-analyzer: ${err.message}`);
31 async function tryActivate(context: vscode.ExtensionContext) {
32 // Register a "dumb" onEnter command for the case where server fails to
35 // FIXME: refactor command registration code such that commands are
36 // **always** registered, even if the server does not start. Use API like
41 // factory: (Ctx) => ((Ctx) => any),
42 // fallback: () => any = () => vscode.window.showErrorMessage(
43 // "rust-analyzer is not available"
46 const defaultOnEnter = vscode.commands.registerCommand(
47 'rust-analyzer.onEnter',
48 () => vscode.commands.executeCommand('default:type', { text: '\n' }),
50 context.subscriptions.push(defaultOnEnter);
52 const config = new Config(context);
53 const state = new PersistentState(context.globalState);
54 const serverPath = await bootstrap(config, state).catch(err => {
55 let message = "bootstrap error. ";
57 if (err.code === "EBUSY" || err.code === "ETXTBSY" || err.code === "EPERM") {
58 message += "Other vscode windows might be using rust-analyzer, ";
59 message += "you should close them and reload this window to retry. ";
62 message += 'See the logs in "OUTPUT > Rust Analyzer Client" (should open automatically). ';
63 message += 'To enable verbose logs use { "rust-analyzer.trace.extension": true }';
65 log.error("Bootstrap error", err);
66 throw new Error(message);
69 const workspaceFolder = vscode.workspace.workspaceFolders?.[0];
70 if (workspaceFolder === undefined) {
71 throw new Error("no folder is opened");
74 // Note: we try to start the server before we activate type hints so that it
75 // registers its `onDidChangeDocument` handler before us.
77 // This a horribly, horribly wrong way to deal with this problem.
78 ctx = await Ctx.create(config, context, serverPath, workspaceFolder.uri.fsPath);
80 setContextValue(RUST_PROJECT_CONTEXT_NAME, true);
82 // Commands which invokes manually via command palette, shortcut, etc.
84 // Reloading is inspired by @DanTup maneuver: https://github.com/microsoft/vscode/issues/45774#issuecomment-373423895
85 ctx.registerCommand('reload', _ => async () => {
86 void vscode.window.showInformationMessage('Reloading rust-analyzer...');
88 while (context.subscriptions.length > 0) {
90 context.subscriptions.pop()!.dispose();
92 log.error("Dispose error:", err);
95 await activate(context).catch(log.error);
98 ctx.registerCommand('analyzerStatus', commands.analyzerStatus);
99 ctx.registerCommand('memoryUsage', commands.memoryUsage);
100 ctx.registerCommand('reloadWorkspace', commands.reloadWorkspace);
101 ctx.registerCommand('matchingBrace', commands.matchingBrace);
102 ctx.registerCommand('joinLines', commands.joinLines);
103 ctx.registerCommand('parentModule', commands.parentModule);
104 ctx.registerCommand('syntaxTree', commands.syntaxTree);
105 ctx.registerCommand('expandMacro', commands.expandMacro);
106 ctx.registerCommand('run', commands.run);
107 ctx.registerCommand('debug', commands.debug);
108 ctx.registerCommand('newDebugConfig', commands.newDebugConfig);
110 defaultOnEnter.dispose();
111 ctx.registerCommand('onEnter', commands.onEnter);
113 ctx.registerCommand('ssr', commands.ssr);
114 ctx.registerCommand('serverVersion', commands.serverVersion);
115 ctx.registerCommand('toggleInlayHints', commands.toggleInlayHints);
117 // Internal commands which are invoked by the server.
118 ctx.registerCommand('runSingle', commands.runSingle);
119 ctx.registerCommand('debugSingle', commands.debugSingle);
120 ctx.registerCommand('showReferences', commands.showReferences);
121 ctx.registerCommand('applySnippetWorkspaceEdit', commands.applySnippetWorkspaceEditCommand);
122 ctx.registerCommand('resolveCodeAction', commands.resolveCodeAction);
123 ctx.registerCommand('applyActionGroup', commands.applyActionGroup);
124 ctx.registerCommand('gotoLocation', commands.gotoLocation);
126 ctx.pushCleanup(activateTaskProvider(workspaceFolder, ctx.config));
128 activateInlayHints(ctx);
130 vscode.workspace.onDidChangeConfiguration(
131 _ => ctx?.client?.sendNotification('workspace/didChangeConfiguration', { settings: "" }),
137 export async function deactivate() {
138 setContextValue(RUST_PROJECT_CONTEXT_NAME, undefined);
139 await ctx?.client.stop();
143 async function bootstrap(config: Config, state: PersistentState): Promise<string> {
144 await fs.mkdir(config.globalStoragePath, { recursive: true });
146 await bootstrapExtension(config, state);
147 const path = await bootstrapServer(config, state);
152 async function bootstrapExtension(config: Config, state: PersistentState): Promise<void> {
153 if (config.package.releaseTag === null) return;
154 if (config.channel === "stable") {
155 if (config.package.releaseTag === NIGHTLY_TAG) {
156 void vscode.window.showWarningMessage(
157 `You are running a nightly version of rust-analyzer extension. ` +
158 `To switch to stable, uninstall the extension and re-install it from the marketplace`
164 const now = Date.now();
165 if (config.package.releaseTag === NIGHTLY_TAG) {
166 // Check if we should poll github api for the new nightly version
167 // if we haven't done it during the past hour
168 const lastCheck = state.lastCheck;
170 const anHour = 60 * 60 * 1000;
171 const shouldCheckForNewNightly = state.releaseId === undefined || (now - (lastCheck ?? 0)) > anHour;
173 if (!shouldCheckForNewNightly) return;
176 const release = await performDownloadWithRetryDialog(async () => {
177 return await fetchRelease("nightly", state.githubToken);
178 }, state).catch((e) => {
180 if (state.releaseId === undefined) { // Show error only for the initial download
181 vscode.window.showErrorMessage(`Failed to download rust-analyzer nightly ${e}`);
185 if (release === undefined || release.id === state.releaseId) return;
187 const userResponse = await vscode.window.showInformationMessage(
188 "New version of rust-analyzer (nightly) is available (requires reload).",
191 if (userResponse !== "Update") return;
193 const artifact = release.assets.find(artifact => artifact.name === "rust-analyzer.vsix");
194 assert(!!artifact, `Bad release: ${JSON.stringify(release)}`);
196 const dest = path.join(config.globalStoragePath, "rust-analyzer.vsix");
198 await performDownloadWithRetryDialog(async () => {
199 // Unlinking the exe file before moving new one on its place should prevent ETXTBSY error.
200 await fs.unlink(dest).catch(err => {
201 if (err.code !== "ENOENT") throw err;
205 url: artifact.browser_download_url,
207 progressTitle: "Downloading rust-analyzer extension",
211 await vscode.commands.executeCommand("workbench.extensions.installExtension", vscode.Uri.file(dest));
212 await fs.unlink(dest);
214 await state.updateReleaseId(release.id);
215 await state.updateLastCheck(now);
216 await vscode.commands.executeCommand("workbench.action.reloadWindow");
219 async function bootstrapServer(config: Config, state: PersistentState): Promise<string> {
220 const path = await getServer(config, state);
223 "Rust Analyzer Language Server is not available. " +
224 "Please, ensure its [proper installation](https://rust-analyzer.github.io/manual.html#installation)."
228 log.info("Using server binary at", path);
230 if (!isValidExecutable(path)) {
231 throw new Error(`Failed to execute ${path} --version`);
237 async function patchelf(dest: PathLike): Promise<void> {
238 await vscode.window.withProgress(
240 location: vscode.ProgressLocation.Notification,
241 title: "Patching rust-analyzer for NixOS"
243 async (progress, _) => {
245 {src, pkgs ? import <nixpkgs> {}}:
246 pkgs.stdenv.mkDerivation {
247 name = "rust-analyzer";
249 phases = [ "installPhase" "fixupPhase" ];
250 installPhase = "cp $src $out";
253 patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out
257 const origFile = dest + "-orig";
258 await fs.rename(dest, origFile);
259 progress.report({ message: "Patching executable", increment: 20 });
260 await new Promise((resolve, reject) => {
261 const handle = exec(`nix-build -E - --arg src '${origFile}' -o ${dest}`,
262 (err, stdout, stderr) => {
264 reject(Error(stderr));
269 handle.stdin?.write(expression);
272 await fs.unlink(origFile);
277 async function getServer(config: Config, state: PersistentState): Promise<string | undefined> {
278 const explicitPath = process.env.__RA_LSP_SERVER_DEBUG ?? config.serverPath;
280 if (explicitPath.startsWith("~/")) {
281 return os.homedir() + explicitPath.slice("~".length);
285 if (config.package.releaseTag === null) return "rust-analyzer";
287 let platform: string | undefined;
288 if (process.arch === "x64" || process.arch === "ia32") {
289 if (process.platform === "linux") platform = "linux";
290 if (process.platform === "darwin") platform = "mac";
291 if (process.platform === "win32") platform = "windows";
293 if (platform === undefined) {
294 vscode.window.showErrorMessage(
295 "Unfortunately we don't ship binaries for your platform yet. " +
296 "You need to manually clone rust-analyzer repository and " +
297 "run `cargo xtask install --server` to build the language server from sources. " +
298 "If you feel that your platform should be supported, please create an issue " +
299 "about that [here](https://github.com/rust-analyzer/rust-analyzer/issues) and we " +
304 const ext = platform === "windows" ? ".exe" : "";
305 const dest = path.join(config.globalStoragePath, `rust-analyzer-${platform}${ext}`);
306 const exists = await fs.stat(dest).then(() => true, () => false);
308 await state.updateServerVersion(undefined);
311 if (state.serverVersion === config.package.version) return dest;
313 if (config.askBeforeDownload) {
314 const userResponse = await vscode.window.showInformationMessage(
315 `Language server version ${config.package.version} for rust-analyzer is not installed.`,
318 if (userResponse !== "Download now") return dest;
321 const releaseTag = config.package.releaseTag;
322 const release = await performDownloadWithRetryDialog(async () => {
323 return await fetchRelease(releaseTag, state.githubToken);
325 const artifact = release.assets.find(artifact => artifact.name === `rust-analyzer-${platform}.gz`);
326 assert(!!artifact, `Bad release: ${JSON.stringify(release)}`);
328 await performDownloadWithRetryDialog(async () => {
329 // Unlinking the exe file before moving new one on its place should prevent ETXTBSY error.
330 await fs.unlink(dest).catch(err => {
331 if (err.code !== "ENOENT") throw err;
335 url: artifact.browser_download_url,
337 progressTitle: "Downloading rust-analyzer server",
343 // Patching executable if that's NixOS.
344 if (await fs.stat("/etc/nixos").then(_ => true).catch(_ => false)) {
345 await patchelf(dest);
348 await state.updateServerVersion(config.package.version);
352 async function performDownloadWithRetryDialog<T>(downloadFunc: () => Promise<T>, state: PersistentState): Promise<T> {
355 return await downloadFunc();
357 const selected = await vscode.window.showErrorMessage("Failed perform download: " + e.message, {}, {
358 title: "Update Github Auth Token",
361 title: "Retry download",
367 if (selected?.updateToken) {
368 await queryForGithubToken(state);
370 } else if (selected?.retry) {
379 async function queryForGithubToken(state: PersistentState): Promise<void> {
380 const githubTokenOptions: vscode.InputBoxOptions = {
381 value: state.githubToken,
384 This dialog allows to store a Github authorization token.
385 The usage of an authorization token will increase the rate
386 limit on the use of Github APIs and can thereby prevent getting
388 Auth tokens can be created at https://github.com/settings/tokens`,
391 const newToken = await vscode.window.showInputBox(githubTokenOptions);
393 log.info("Storing new github token");
394 await state.updateGithubToken(newToken);