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 // VS Code doesn't show a notification when an extension fails to activate
23 // so we do it ourselves.
24 await tryActivate(context).catch(err => {
25 void vscode.window.showErrorMessage(`Cannot activate rust-analyzer: ${err.message}`);
30 async function tryActivate(context: vscode.ExtensionContext) {
31 // Register a "dumb" onEnter command for the case where server fails to
34 // FIXME: refactor command registration code such that commands are
35 // **always** registered, even if the server does not start. Use API like
40 // factory: (Ctx) => ((Ctx) => any),
41 // fallback: () => any = () => vscode.window.showErrorMessage(
42 // "rust-analyzer is not available"
45 const defaultOnEnter = vscode.commands.registerCommand(
46 'rust-analyzer.onEnter',
47 () => vscode.commands.executeCommand('default:type', { text: '\n' }),
49 context.subscriptions.push(defaultOnEnter);
51 const config = new Config(context);
52 const state = new PersistentState(context.globalState);
53 const serverPath = await bootstrap(config, state).catch(err => {
54 let message = "bootstrap error. ";
56 if (err.code === "EBUSY" || err.code === "ETXTBSY" || err.code === "EPERM") {
57 message += "Other vscode windows might be using rust-analyzer, ";
58 message += "you should close them and reload this window to retry. ";
61 message += 'See the logs in "OUTPUT > Rust Analyzer Client" (should open automatically). ';
62 message += 'To enable verbose logs use { "rust-analyzer.trace.extension": true }';
64 log.error("Bootstrap error", err);
65 throw new Error(message);
68 const workspaceFolder = vscode.workspace.workspaceFolders?.[0];
69 if (workspaceFolder === undefined) {
70 throw new Error("no folder is opened");
73 // Note: we try to start the server before we activate type hints so that it
74 // registers its `onDidChangeDocument` handler before us.
76 // This a horribly, horribly wrong way to deal with this problem.
77 ctx = await Ctx.create(config, context, serverPath, workspaceFolder.uri.fsPath);
79 setContextValue(RUST_PROJECT_CONTEXT_NAME, true);
81 // Commands which invokes manually via command palette, shortcut, etc.
83 // Reloading is inspired by @DanTup maneuver: https://github.com/microsoft/vscode/issues/45774#issuecomment-373423895
84 ctx.registerCommand('reload', _ => async () => {
85 void vscode.window.showInformationMessage('Reloading rust-analyzer...');
87 while (context.subscriptions.length > 0) {
89 context.subscriptions.pop()!.dispose();
91 log.error("Dispose error:", err);
94 await activate(context).catch(log.error);
97 ctx.registerCommand('updateGithubToken', ctx => async () => {
98 await queryForGithubToken(new PersistentState(ctx.globalState));
101 ctx.registerCommand('analyzerStatus', commands.analyzerStatus);
102 ctx.registerCommand('memoryUsage', commands.memoryUsage);
103 ctx.registerCommand('reloadWorkspace', commands.reloadWorkspace);
104 ctx.registerCommand('matchingBrace', commands.matchingBrace);
105 ctx.registerCommand('joinLines', commands.joinLines);
106 ctx.registerCommand('parentModule', commands.parentModule);
107 ctx.registerCommand('syntaxTree', commands.syntaxTree);
108 ctx.registerCommand('viewHir', commands.viewHir);
109 ctx.registerCommand('expandMacro', commands.expandMacro);
110 ctx.registerCommand('run', commands.run);
111 ctx.registerCommand('debug', commands.debug);
112 ctx.registerCommand('newDebugConfig', commands.newDebugConfig);
113 ctx.registerCommand('openDocs', commands.openDocs);
114 ctx.registerCommand('openCargoToml', commands.openCargoToml);
116 defaultOnEnter.dispose();
117 ctx.registerCommand('onEnter', commands.onEnter);
119 ctx.registerCommand('ssr', commands.ssr);
120 ctx.registerCommand('serverVersion', commands.serverVersion);
121 ctx.registerCommand('toggleInlayHints', commands.toggleInlayHints);
123 // Internal commands which are invoked by the server.
124 ctx.registerCommand('runSingle', commands.runSingle);
125 ctx.registerCommand('debugSingle', commands.debugSingle);
126 ctx.registerCommand('showReferences', commands.showReferences);
127 ctx.registerCommand('applySnippetWorkspaceEdit', commands.applySnippetWorkspaceEditCommand);
128 ctx.registerCommand('resolveCodeAction', commands.resolveCodeAction);
129 ctx.registerCommand('applyActionGroup', commands.applyActionGroup);
130 ctx.registerCommand('gotoLocation', commands.gotoLocation);
132 ctx.pushCleanup(activateTaskProvider(workspaceFolder, ctx.config));
134 activateInlayHints(ctx);
135 warnAboutExtensionConflicts();
137 vscode.workspace.onDidChangeConfiguration(
138 _ => ctx?.client?.sendNotification('workspace/didChangeConfiguration', { settings: "" }),
144 export async function deactivate() {
145 setContextValue(RUST_PROJECT_CONTEXT_NAME, undefined);
146 await ctx?.client.stop();
150 async function bootstrap(config: Config, state: PersistentState): Promise<string> {
151 await fs.mkdir(config.globalStoragePath, { recursive: true });
153 await bootstrapExtension(config, state);
154 const path = await bootstrapServer(config, state);
159 async function bootstrapExtension(config: Config, state: PersistentState): Promise<void> {
160 if (config.package.releaseTag === null) return;
161 if (config.channel === "stable") {
162 if (config.package.releaseTag === NIGHTLY_TAG) {
163 void vscode.window.showWarningMessage(
164 `You are running a nightly version of rust-analyzer extension. ` +
165 `To switch to stable, uninstall the extension and re-install it from the marketplace`
170 if (serverPath(config)) return;
172 const now = Date.now();
173 if (config.package.releaseTag === NIGHTLY_TAG) {
174 // Check if we should poll github api for the new nightly version
175 // if we haven't done it during the past hour
176 const lastCheck = state.lastCheck;
178 const anHour = 60 * 60 * 1000;
179 const shouldCheckForNewNightly = state.releaseId === undefined || (now - (lastCheck ?? 0)) > anHour;
181 if (!shouldCheckForNewNightly) return;
184 const release = await downloadWithRetryDialog(state, async () => {
185 return await fetchRelease("nightly", state.githubToken);
188 if (state.releaseId === undefined) { // Show error only for the initial download
189 vscode.window.showErrorMessage(`Failed to download rust-analyzer nightly ${e}`);
193 if (release === undefined || release.id === state.releaseId) return;
195 const userResponse = await vscode.window.showInformationMessage(
196 "New version of rust-analyzer (nightly) is available (requires reload).",
199 if (userResponse !== "Update") return;
201 const artifact = release.assets.find(artifact => artifact.name === "rust-analyzer.vsix");
202 assert(!!artifact, `Bad release: ${JSON.stringify(release)}`);
204 const dest = path.join(config.globalStoragePath, "rust-analyzer.vsix");
206 await downloadWithRetryDialog(state, async () => {
208 url: artifact.browser_download_url,
210 progressTitle: "Downloading rust-analyzer extension",
214 await vscode.commands.executeCommand("workbench.extensions.installExtension", vscode.Uri.file(dest));
215 await fs.unlink(dest);
217 await state.updateReleaseId(release.id);
218 await state.updateLastCheck(now);
219 await vscode.commands.executeCommand("workbench.action.reloadWindow");
222 async function bootstrapServer(config: Config, state: PersistentState): Promise<string> {
223 const path = await getServer(config, state);
226 "Rust Analyzer Language Server is not available. " +
227 "Please, ensure its [proper installation](https://rust-analyzer.github.io/manual.html#installation)."
231 log.info("Using server binary at", path);
233 if (!isValidExecutable(path)) {
234 throw new Error(`Failed to execute ${path} --version`);
240 async function patchelf(dest: PathLike): Promise<void> {
241 await vscode.window.withProgress(
243 location: vscode.ProgressLocation.Notification,
244 title: "Patching rust-analyzer for NixOS"
246 async (progress, _) => {
248 {src, pkgs ? import <nixpkgs> {}}:
249 pkgs.stdenv.mkDerivation {
250 name = "rust-analyzer";
252 phases = [ "installPhase" "fixupPhase" ];
253 installPhase = "cp $src $out";
256 patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out
260 const origFile = dest + "-orig";
261 await fs.rename(dest, origFile);
262 progress.report({ message: "Patching executable", increment: 20 });
263 await new Promise((resolve, reject) => {
264 const handle = exec(`nix-build -E - --arg src '${origFile}' -o ${dest}`,
265 (err, stdout, stderr) => {
267 reject(Error(stderr));
272 handle.stdin?.write(expression);
275 await fs.unlink(origFile);
280 async function getServer(config: Config, state: PersistentState): Promise<string | undefined> {
281 const explicitPath = serverPath(config);
283 if (explicitPath.startsWith("~/")) {
284 return os.homedir() + explicitPath.slice("~".length);
288 if (config.package.releaseTag === null) return "rust-analyzer";
290 const platforms: { [key: string]: string } = {
291 "ia32 win32": "x86_64-pc-windows-msvc",
292 "x64 win32": "x86_64-pc-windows-msvc",
293 "x64 linux": "x86_64-unknown-linux-gnu",
294 "x64 darwin": "x86_64-apple-darwin",
295 "arm64 win32": "aarch64-pc-windows-msvc",
296 "arm64 linux": "aarch64-unknown-linux-gnu",
297 "arm64 darwin": "aarch64-apple-darwin",
299 const platform = platforms[`${process.arch} ${process.platform}`];
300 if (platform === undefined) {
301 vscode.window.showErrorMessage(
302 "Unfortunately we don't ship binaries for your platform yet. " +
303 "You need to manually clone rust-analyzer repository and " +
304 "run `cargo xtask install --server` to build the language server from sources. " +
305 "If you feel that your platform should be supported, please create an issue " +
306 "about that [here](https://github.com/rust-analyzer/rust-analyzer/issues) and we " +
311 const ext = platform.indexOf("-windows-") !== -1 ? ".exe" : "";
312 const dest = path.join(config.globalStoragePath, `rust-analyzer-${platform}${ext}`);
313 const exists = await fs.stat(dest).then(() => true, () => false);
315 await state.updateServerVersion(undefined);
318 if (state.serverVersion === config.package.version) return dest;
320 if (config.askBeforeDownload) {
321 const userResponse = await vscode.window.showInformationMessage(
322 `Language server version ${config.package.version} for rust-analyzer is not installed.`,
325 if (userResponse !== "Download now") return dest;
328 const releaseTag = config.package.releaseTag;
329 const release = await downloadWithRetryDialog(state, async () => {
330 return await fetchRelease(releaseTag, state.githubToken);
332 const artifact = release.assets.find(artifact => artifact.name === `rust-analyzer-${platform}.gz`);
333 assert(!!artifact, `Bad release: ${JSON.stringify(release)}`);
335 await downloadWithRetryDialog(state, async () => {
337 url: artifact.browser_download_url,
339 progressTitle: "Downloading rust-analyzer server",
345 // Patching executable if that's NixOS.
346 if (await isNixOs()) {
347 await patchelf(dest);
350 await state.updateServerVersion(config.package.version);
354 function serverPath(config: Config): string | null {
355 return process.env.__RA_LSP_SERVER_DEBUG ?? config.serverPath;
358 async function isNixOs(): Promise<boolean> {
360 const contents = await fs.readFile("/etc/os-release");
361 return contents.indexOf("ID=nixos") !== -1;
367 async function downloadWithRetryDialog<T>(state: PersistentState, downloadFunc: () => Promise<T>): Promise<T> {
370 return await downloadFunc();
372 const selected = await vscode.window.showErrorMessage("Failed to download: " + e.message, {}, {
373 title: "Update Github Auth Token",
376 title: "Retry download",
382 if (selected?.updateToken) {
383 await queryForGithubToken(state);
385 } else if (selected?.retry) {
393 async function queryForGithubToken(state: PersistentState): Promise<void> {
394 const githubTokenOptions: vscode.InputBoxOptions = {
395 value: state.githubToken,
398 This dialog allows to store a Github authorization token.
399 The usage of an authorization token will increase the rate
400 limit on the use of Github APIs and can thereby prevent getting
402 Auth tokens can be created at https://github.com/settings/tokens`,
405 const newToken = await vscode.window.showInputBox(githubTokenOptions);
406 if (newToken === undefined) {
407 // The user aborted the dialog => Do not update the stored token
411 if (newToken === "") {
412 log.info("Clearing github token");
413 await state.updateGithubToken(undefined);
415 log.info("Storing new github token");
416 await state.updateGithubToken(newToken);
420 function warnAboutExtensionConflicts() {
421 const conflicting = [
422 ["rust-analyzer", "matklad.rust-analyzer"],
423 ["Rust", "rust-lang.rust"],
424 ["Rust", "kalitaalexey.vscode-rust"],
427 const found = conflicting.filter(
428 nameId => vscode.extensions.getExtension(nameId[1]) !== undefined);
430 if (found.length > 1) {
431 const fst = found[0];
432 const sec = found[1];
433 vscode.window.showWarningMessage(
434 `You have both the ${fst[0]} (${fst[1]}) and ${sec[0]} (${sec[1]}) ` +
435 "plugins enabled. These are known to conflict and cause various functions of " +
436 "both plugins to not work correctly. You should disable one of them.", "Got it");