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import * as vscode from "vscode";
import * as path from "path";
import { strict as assert } from "assert";
import { promises as fs } from "fs";
import { promises as dns } from "dns";
import { spawnSync } from "child_process";
import { throttle } from "throttle-debounce";
import { BinarySource } from "./interfaces";
import { fetchLatestArtifactMetadata } from "./fetch_latest_artifact_metadata";
import { downloadFile } from "./download_file";
export async function downloadLatestLanguageServer(
{file: artifactFileName, dir: installationDir, repo}: BinarySource.GithubRelease
) {
const { releaseName, downloadUrl } = (await fetchLatestArtifactMetadata(
repo, artifactFileName
))!;
await fs.mkdir(installationDir).catch(err => assert.strictEqual(
err?.code,
"EEXIST",
`Couldn't create directory "${installationDir}" to download `+
`language server binary: ${err.message}`
));
const installationPath = path.join(installationDir, artifactFileName);
console.time("Downloading ra_lsp_server");
await vscode.window.withProgress(
{
location: vscode.ProgressLocation.Notification,
cancellable: false, // FIXME: add support for canceling download?
title: `Downloading language server (${releaseName})`
},
async (progress, _cancellationToken) => {
let lastPrecentage = 0;
const filePermissions = 0o755; // (rwx, r_x, r_x)
await downloadFile(downloadUrl, installationPath, filePermissions, throttle(
200,
/* noTrailing: */ true,
(readBytes, totalBytes) => {
const newPercentage = (readBytes / totalBytes) * 100;
progress.report({
message: newPercentage.toFixed(0) + "%",
increment: newPercentage - lastPrecentage
});
lastPrecentage = newPercentage;
})
);
}
);
console.timeEnd("Downloading ra_lsp_server");
}
export async function ensureLanguageServerBinary(
langServerSource: null | BinarySource
): Promise<null | string> {
if (!langServerSource) {
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 null;
}
switch (langServerSource.type) {
case BinarySource.Type.ExplicitPath: {
if (isBinaryAvailable(langServerSource.path)) {
return langServerSource.path;
}
vscode.window.showErrorMessage(
`Unable to run ${langServerSource.path} binary. ` +
`To use the pre-built language server, set "rust-analyzer.raLspServerPath" ` +
"value to `null` or remove it from the settings to use it by default."
);
return null;
}
case BinarySource.Type.GithubRelease: {
const prebuiltBinaryPath = path.join(langServerSource.dir, langServerSource.file);
if (isBinaryAvailable(prebuiltBinaryPath)) {
return prebuiltBinaryPath;
}
const userResponse = await vscode.window.showInformationMessage(
"Language server binary for rust-analyzer was not found. " +
"Do you want to download it now?",
"Download now", "Cancel"
);
if (userResponse !== "Download now") return null;
try {
await downloadLatestLanguageServer(langServerSource);
} catch (err) {
vscode.window.showErrorMessage(
`Failed to download language server from ${langServerSource.repo.name} ` +
`GitHub repository: ${err.message}`
);
console.error(err);
dns.resolve('example.com').then(
addrs => console.log("DNS resolution for example.com was successful", addrs),
err => {
console.error(
"DNS resolution for example.com failed, " +
"there might be an issue with Internet availability"
);
console.error(err);
}
);
return null;
}
if (!isBinaryAvailable(prebuiltBinaryPath)) assert(false,
`Downloaded language server binary is not functional.` +
`Downloaded from: ${JSON.stringify(langServerSource)}`
);
vscode.window.showInformationMessage(
"Rust analyzer language server was successfully installed 🦀"
);
return prebuiltBinaryPath;
}
}
function isBinaryAvailable(binaryPath: string) {
const res = spawnSync(binaryPath, ["--version"]);
// ACHTUNG! `res` type declaration is inherently wrong, see
// https://github.com/DefinitelyTyped/DefinitelyTyped/issues/42221
console.log("Checked binary availablity via --version", res);
console.log(binaryPath, "--version output:", res.output?.map(String));
return res.status === 0;
}
}
|
