aboutsummaryrefslogtreecommitdiff
path: root/editors/code/src/main.ts
blob: 5877be8b27592cf42513d57af73abb3b272d053e (plain)
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
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
import * as vscode from 'vscode';
import * as path from "path";
import * as os from "os";
import { promises as fs, PathLike } from "fs";

import * as commands from './commands';
import { activateInlayHints } from './inlay_hints';
import { Ctx } from './ctx';
import { Config, NIGHTLY_TAG } from './config';
import { log, assert, isValidExecutable } from './util';
import { PersistentState } from './persistent_state';
import { fetchRelease, download } from './net';
import { activateTaskProvider } from './tasks';
import { setContextValue } from './util';
import { exec } from 'child_process';

let ctx: Ctx | undefined;

const RUST_PROJECT_CONTEXT_NAME = "inRustProject";

export async function activate(context: vscode.ExtensionContext) {
    // For some reason vscode not always shows pop-up error notifications
    // when an extension fails to activate, so we do it explicitly by ourselves.
    // FIXME: remove this bit of code once vscode fixes this issue: https://github.com/microsoft/vscode/issues/101242
    await tryActivate(context).catch(err => {
        void vscode.window.showErrorMessage(`Cannot activate rust-analyzer: ${err.message}`);
        throw err;
    });
}

async function tryActivate(context: vscode.ExtensionContext) {
    // Register a "dumb" onEnter command for the case where server fails to
    // start.
    //
    // FIXME: refactor command registration code such that commands are
    // **always** registered, even if the server does not start. Use API like
    // this perhaps?
    //
    // ```TypeScript
    // registerCommand(
    //    factory: (Ctx) => ((Ctx) => any),
    //    fallback: () => any = () => vscode.window.showErrorMessage(
    //        "rust-analyzer is not available"
    //    ),
    // )
    const defaultOnEnter = vscode.commands.registerCommand(
        'rust-analyzer.onEnter',
        () => vscode.commands.executeCommand('default:type', { text: '\n' }),
    );
    context.subscriptions.push(defaultOnEnter);

    const config = new Config(context);
    const state = new PersistentState(context.globalState);
    const serverPath = await bootstrap(config, state).catch(err => {
        let message = "bootstrap error. ";

        if (err.code === "EBUSY" || err.code === "ETXTBSY") {
            message += "Other vscode windows might be using rust-analyzer, ";
            message += "you should close them and reload this window to retry. ";
        }

        message += 'See the logs in "OUTPUT > Rust Analyzer Client" (should open automatically). ';
        message += 'To enable verbose logs use { "rust-analyzer.trace.extension": true }';

        log.error("Bootstrap error", err);
        throw new Error(message);
    });

    const workspaceFolder = vscode.workspace.workspaceFolders?.[0];
    if (workspaceFolder === undefined) {
        throw new Error("no folder is opened");
    }

    // Note: we try to start the server before we activate type hints so that it
    // registers its `onDidChangeDocument` handler before us.
    //
    // This a horribly, horribly wrong way to deal with this problem.
    ctx = await Ctx.create(config, context, serverPath, workspaceFolder.uri.fsPath);

    setContextValue(RUST_PROJECT_CONTEXT_NAME, true);

    // Commands which invokes manually via command palette, shortcut, etc.

    // Reloading is inspired by @DanTup maneuver: https://github.com/microsoft/vscode/issues/45774#issuecomment-373423895
    ctx.registerCommand('reload', _ => async () => {
        void vscode.window.showInformationMessage('Reloading rust-analyzer...');
        await deactivate();
        while (context.subscriptions.length > 0) {
            try {
                context.subscriptions.pop()!.dispose();
            } catch (err) {
                log.error("Dispose error:", err);
            }
        }
        await activate(context).catch(log.error);
    });

    ctx.registerCommand('analyzerStatus', commands.analyzerStatus);
    ctx.registerCommand('reloadWorkspace', commands.reloadWorkspace);
    ctx.registerCommand('matchingBrace', commands.matchingBrace);
    ctx.registerCommand('joinLines', commands.joinLines);
    ctx.registerCommand('parentModule', commands.parentModule);
    ctx.registerCommand('syntaxTree', commands.syntaxTree);
    ctx.registerCommand('expandMacro', commands.expandMacro);
    ctx.registerCommand('run', commands.run);
    ctx.registerCommand('debug', commands.debug);
    ctx.registerCommand('newDebugConfig', commands.newDebugConfig);

    defaultOnEnter.dispose();
    ctx.registerCommand('onEnter', commands.onEnter);

    ctx.registerCommand('ssr', commands.ssr);
    ctx.registerCommand('serverVersion', commands.serverVersion);
    ctx.registerCommand('toggleInlayHints', commands.toggleInlayHints);

    // Internal commands which are invoked by the server.
    ctx.registerCommand('runSingle', commands.runSingle);
    ctx.registerCommand('debugSingle', commands.debugSingle);
    ctx.registerCommand('showReferences', commands.showReferences);
    ctx.registerCommand('applySnippetWorkspaceEdit', commands.applySnippetWorkspaceEditCommand);
    ctx.registerCommand('resolveCodeAction', commands.resolveCodeAction);
    ctx.registerCommand('applyActionGroup', commands.applyActionGroup);
    ctx.registerCommand('gotoLocation', commands.gotoLocation);

    ctx.pushCleanup(activateTaskProvider(workspaceFolder, ctx.config));

    activateInlayHints(ctx);

    vscode.workspace.onDidChangeConfiguration(
        _ => ctx?.client?.sendNotification('workspace/didChangeConfiguration', { settings: "" }),
        null,
        ctx.subscriptions,
    );
}

export async function deactivate() {
    setContextValue(RUST_PROJECT_CONTEXT_NAME, undefined);
    await ctx?.client.stop();
    ctx = undefined;
}

async function bootstrap(config: Config, state: PersistentState): Promise<string> {
    await fs.mkdir(config.globalStoragePath, { recursive: true });

    await bootstrapExtension(config, state);
    const path = await bootstrapServer(config, state);

    return path;
}

async function bootstrapExtension(config: Config, state: PersistentState): Promise<void> {
    if (config.package.releaseTag === null) return;
    if (config.channel === "stable") {
        if (config.package.releaseTag === NIGHTLY_TAG) {
            void vscode.window.showWarningMessage(
                `You are running a nightly version of rust-analyzer extension. ` +
                `To switch to stable, uninstall the extension and re-install it from the marketplace`
            );
        }
        return;
    };

    const now = Date.now();
    if (config.package.releaseTag === NIGHTLY_TAG) {
        // Check if we should poll github api for the new nightly version
        // if we haven't done it during the past hour
        const lastCheck = state.lastCheck;

        const anHour = 60 * 60 * 1000;
        const shouldCheckForNewNightly = state.releaseId === undefined || (now - (lastCheck ?? 0)) > anHour;

        if (!shouldCheckForNewNightly) return;
    }

    const release = await fetchRelease("nightly").catch((e) => {
        log.error(e);
        if (state.releaseId === undefined) { // Show error only for the initial download
            vscode.window.showErrorMessage(`Failed to download rust-analyzer nightly ${e}`);
        }
        return undefined;
    });
    if (release === undefined || release.id === state.releaseId) return;

    const userResponse = await vscode.window.showInformationMessage(
        "New version of rust-analyzer (nightly) is available (requires reload).",
        "Update"
    );
    if (userResponse !== "Update") return;

    const artifact = release.assets.find(artifact => artifact.name === "rust-analyzer.vsix");
    assert(!!artifact, `Bad release: ${JSON.stringify(release)}`);

    const dest = path.join(config.globalStoragePath, "rust-analyzer.vsix");
    await download({
        url: artifact.browser_download_url,
        dest,
        progressTitle: "Downloading rust-analyzer extension",
    });

    await vscode.commands.executeCommand("workbench.extensions.installExtension", vscode.Uri.file(dest));
    await fs.unlink(dest);

    await state.updateReleaseId(release.id);
    await state.updateLastCheck(now);
    await vscode.commands.executeCommand("workbench.action.reloadWindow");
}

async function bootstrapServer(config: Config, state: PersistentState): Promise<string> {
    const path = await getServer(config, state);
    if (!path) {
        throw new Error(
            "Rust Analyzer Language Server is not available. " +
            "Please, ensure its [proper installation](https://rust-analyzer.github.io/manual.html#installation)."
        );
    }

    log.info("Using server binary at", path);

    if (!isValidExecutable(path)) {
        throw new Error(`Failed to execute ${path} --version`);
    }

    return path;
}

async function patchelf(dest: PathLike): Promise<void> {
    await vscode.window.withProgress(
        {
            location: vscode.ProgressLocation.Notification,
            title: "Patching rust-analyzer for NixOS"
        },
        async (progress, _) => {
            const expression = `
            {src, pkgs ? import <nixpkgs> {}}:
                pkgs.stdenv.mkDerivation {
                    name = "rust-analyzer";
                    inherit src;
                    phases = [ "installPhase" "fixupPhase" ];
                    installPhase = "cp $src $out";
                    fixupPhase = ''
                    chmod 755 $out
                    patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out
                    '';
                }
            `;
            const origFile = dest + "-orig";
            await fs.rename(dest, origFile);
            progress.report({ message: "Patching executable", increment: 20 });
            await new Promise((resolve, reject) => {
                const handle = exec(`nix-build -E - --arg src '${origFile}' -o ${dest}`,
                    (err, stdout, stderr) => {
                        if (err != null) {
                            reject(Error(stderr));
                        } else {
                            resolve(stdout);
                        }
                    });
                handle.stdin?.write(expression);
                handle.stdin?.end();
            });
            await fs.unlink(origFile);
        }
    );
}

async function getServer(config: Config, state: PersistentState): Promise<string | undefined> {
    const explicitPath = process.env.__RA_LSP_SERVER_DEBUG ?? config.serverPath;
    if (explicitPath) {
        if (explicitPath.startsWith("~/")) {
            return os.homedir() + explicitPath.slice("~".length);
        }
        return explicitPath;
    };
    if (config.package.releaseTag === null) return "rust-analyzer";

    let binaryName: string | undefined = undefined;
    if (process.arch === "x64" || process.arch === "ia32") {
        if (process.platform === "linux") binaryName = "rust-analyzer-linux";
        if (process.platform === "darwin") binaryName = "rust-analyzer-mac";
        if (process.platform === "win32") binaryName = "rust-analyzer-windows.exe";
    }
    if (binaryName === undefined) {
        vscode.window.showErrorMessage(
            "Unfortunately we don't ship binaries for your platform yet. " +
            "You need to manually clone rust-analyzer repository and " +
            "run `cargo xtask install --server` to build the language server from sources. " +
            "If you feel that your platform should be supported, please create an issue " +
            "about that [here](https://github.com/rust-analyzer/rust-analyzer/issues) and we " +
            "will consider it."
        );
        return undefined;
    }

    const dest = path.join(config.globalStoragePath, binaryName);
    const exists = await fs.stat(dest).then(() => true, () => false);
    if (!exists) {
        await state.updateServerVersion(undefined);
    }

    if (state.serverVersion === config.package.version) return dest;

    if (config.askBeforeDownload) {
        const userResponse = await vscode.window.showInformationMessage(
            `Language server version ${config.package.version} for rust-analyzer is not installed.`,
            "Download now"
        );
        if (userResponse !== "Download now") return dest;
    }

    const release = await fetchRelease(config.package.releaseTag);
    const artifact = release.assets.find(artifact => artifact.name === binaryName);
    assert(!!artifact, `Bad release: ${JSON.stringify(release)}`);

    // Unlinking the exe file before moving new one on its place should prevent ETXTBSY error.
    await fs.unlink(dest).catch(err => {
        if (err.code !== "ENOENT") throw err;
    });

    await download({
        url: artifact.browser_download_url,
        dest,
        progressTitle: "Downloading rust-analyzer server",
        mode: 0o755
    });

    // Patching executable if that's NixOS.
    if (await fs.stat("/etc/nixos").then(_ => true).catch(_ => false)) {
        await patchelf(dest);
    }

    await state.updateServerVersion(config.package.version);
    return dest;
}