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110 lines
3.6 KiB
TypeScript
110 lines
3.6 KiB
TypeScript
import packageInfo from "../package.json";
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import fs from "fs";
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import request from "request";
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import md5File from "md5-file";
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import requestPromise from "request-promise-native";
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import { ensureDir, pathExists } from "fs-extra";
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import path from "path";
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class KubectlDownloader {
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public kubectlVersion: string
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protected url: string
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protected path: string;
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protected dirname: string
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constructor(clusterVersion: string, platform: string, arch: string, target: string) {
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this.kubectlVersion = clusterVersion;
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const binaryName = platform === "windows" ? "kubectl.exe" : "kubectl";
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this.url = `https://storage.googleapis.com/kubernetes-release/release/v${this.kubectlVersion}/bin/${platform}/${arch}/${binaryName}`;
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this.dirname = path.dirname(target);
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this.path = target;
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}
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protected async urlEtag() {
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const response = await requestPromise({
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method: "HEAD",
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uri: this.url,
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resolveWithFullResponse: true
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}).catch((error) => { console.log(error); });
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if (response.headers["etag"]) {
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return response.headers["etag"].replace(/"/g, "");
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}
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return "";
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}
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public async checkBinary() {
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const exists = await pathExists(this.path);
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if (exists) {
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const hash = md5File.sync(this.path);
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const etag = await this.urlEtag();
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if(hash == etag) {
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console.log("Kubectl md5sum matches the remote etag");
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return true;
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}
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console.log("Kubectl md5sum " + hash + " does not match the remote etag " + etag + ", unlinking and downloading again");
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await fs.promises.unlink(this.path);
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}
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return false;
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}
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public async downloadKubectl() {
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const exists = await this.checkBinary();
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if(exists) {
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console.log("Already exists and is valid");
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return;
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}
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await ensureDir(path.dirname(this.path), 0o755);
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const file = fs.createWriteStream(this.path);
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console.log(`Downloading kubectl ${this.kubectlVersion} from ${this.url} to ${this.path}`);
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const requestOpts: request.UriOptions & request.CoreOptions = {
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uri: this.url,
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gzip: true
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};
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const stream = request(requestOpts);
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stream.on("complete", () => {
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console.log("kubectl binary download finished");
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// eslint-disable-next-line @typescript-eslint/no-empty-function
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file.end(() => {});
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});
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stream.on("error", (error) => {
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console.log(error);
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// eslint-disable-next-line @typescript-eslint/no-empty-function
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fs.unlink(this.path, () => {});
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throw(error);
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});
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return new Promise((resolve, reject) => {
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file.on("close", () => {
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console.log("kubectl binary download closed");
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fs.chmod(this.path, 0o755, (err) => {
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if (err) reject(err);
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});
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resolve();
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});
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stream.pipe(file);
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});
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}
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}
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const downloadVersion = packageInfo.config.bundledKubectlVersion;
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const baseDir = path.join(process.env.INIT_CWD, 'binaries', 'client');
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const downloads = [
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{ platform: 'linux', arch: 'amd64', target: path.join(baseDir, 'linux', 'x64', 'kubectl') },
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{ platform: 'darwin', arch: 'amd64', target: path.join(baseDir, 'darwin', 'x64', 'kubectl') },
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{ platform: 'windows', arch: 'amd64', target: path.join(baseDir, 'windows', 'x64', 'kubectl.exe') },
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{ platform: 'windows', arch: '386', target: path.join(baseDir, 'windows', 'ia32', 'kubectl.exe') }
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];
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downloads.forEach((dlOpts) => {
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console.log(dlOpts);
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const downloader = new KubectlDownloader(downloadVersion, dlOpts.platform, dlOpts.arch, dlOpts.target);
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console.log("Downloading: " + JSON.stringify(dlOpts));
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downloader.downloadKubectl().then(() => downloader.checkBinary().then(() => console.log("Download complete")));
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});
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