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import fetch from "node-fetch";
import * as vscode from "vscode";
import * as stream from "stream";
import * as crypto from "crypto";
import * as fs from "fs";
import * as zlib from "zlib";
import * as util from "util";
import * as path from "path";
import { log, assert } from "./util";
const pipeline = util.promisify(stream.pipeline);
const GITHUB_API_ENDPOINT_URL = "https://api.github.com";
const OWNER = "rust-analyzer";
const REPO = "rust-analyzer";
export async function fetchRelease(
releaseTag: string,
githubToken: string | null | undefined,
): Promise<GithubRelease> {
const apiEndpointPath = `/repos/${OWNER}/${REPO}/releases/tags/${releaseTag}`;
const requestUrl = GITHUB_API_ENDPOINT_URL + apiEndpointPath;
log.debug("Issuing request for released artifacts metadata to", requestUrl);
const headers: Record<string, string> = { Accept: "application/vnd.github.v3+json" };
if (githubToken != null) {
headers.Authorization = "token " + githubToken;
}
const response = await fetch(requestUrl, { headers: headers });
if (!response.ok) {
log.error("Error fetching artifact release info", {
requestUrl,
releaseTag,
response: {
headers: response.headers,
status: response.status,
body: await response.text(),
}
});
throw new Error(
`Got response ${response.status} when trying to fetch ` +
`release info for ${releaseTag} release`
);
}
// We skip runtime type checks for simplicity (here we cast from `any` to `GithubRelease`)
const release: GithubRelease = await response.json();
return release;
}
// We omit declaration of tremendous amount of fields that we are not using here
export interface GithubRelease {
name: string;
id: number;
// eslint-disable-next-line camelcase
published_at: string;
assets: Array<{
name: string;
// eslint-disable-next-line camelcase
browser_download_url: string;
}>;
}
interface DownloadOpts {
progressTitle: string;
url: string;
dest: string;
mode?: number;
gunzip?: boolean;
overwrite?: boolean;
}
export async function download(opts: DownloadOpts) {
// Put artifact into a temporary file (in the same dir for simplicity)
// to prevent partially downloaded files when user kills vscode
const dest = path.parse(opts.dest);
const randomHex = crypto.randomBytes(5).toString("hex");
const tempFile = path.join(dest.dir, `${dest.name}${randomHex}`);
if (opts.overwrite) {
// Unlinking the exe file before moving new one on its place should prevent ETXTBSY error.
await fs.promises.unlink(opts.dest).catch(err => {
if (err.code !== "ENOENT") throw err;
});
}
await vscode.window.withProgress(
{
location: vscode.ProgressLocation.Notification,
cancellable: false,
title: opts.progressTitle
},
async (progress, _cancellationToken) => {
let lastPercentage = 0;
await downloadFile(opts.url, tempFile, opts.mode, !!opts.gunzip, (readBytes, totalBytes) => {
const newPercentage = (readBytes / totalBytes) * 100;
progress.report({
message: newPercentage.toFixed(0) + "%",
increment: newPercentage - lastPercentage
});
lastPercentage = newPercentage;
});
}
);
await fs.promises.rename(tempFile, opts.dest);
}
async function downloadFile(
url: string,
destFilePath: fs.PathLike,
mode: number | undefined,
gunzip: boolean,
onProgress: (readBytes: number, totalBytes: number) => void
): Promise<void> {
const res = await fetch(url);
if (!res.ok) {
log.error("Error", res.status, "while downloading file from", url);
log.error({ body: await res.text(), headers: res.headers });
throw new Error(`Got response ${res.status} when trying to download a file.`);
}
const totalBytes = Number(res.headers.get('content-length'));
assert(!Number.isNaN(totalBytes), "Sanity check of content-length protocol");
log.debug("Downloading file of", totalBytes, "bytes size from", url, "to", destFilePath);
let readBytes = 0;
res.body.on("data", (chunk: Buffer) => {
readBytes += chunk.length;
onProgress(readBytes, totalBytes);
});
const destFileStream = fs.createWriteStream(destFilePath, { mode });
const srcStream = gunzip ? res.body.pipe(zlib.createGunzip()) : res.body;
await pipeline(srcStream, destFileStream);
// Don't apply the workaround in fixed versions of nodejs, since the process
// freezes on them, the process waits for no-longer emitted `close` event.
// The fix was applied in commit 7eed9d6bcc in v13.11.0
// See the nodejs changelog:
// https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V13.md
const [, major, minor] = /v(\d+)\.(\d+)\.(\d+)/.exec(process.version)!;
if (+major > 13 || (+major === 13 && +minor >= 11)) return;
await new Promise<void>(resolve => {
destFileStream.on("close", resolve);
destFileStream.destroy();
// This workaround is awaiting to be removed when vscode moves to newer nodejs version:
// https://github.com/rust-analyzer/rust-analyzer/issues/3167
});
}
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