Add azcli extension (#16029)

extensions/azcli/src/azdataReleaseInfo.ts

@@ -0,0 +1,76 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as os from 'os';
+import * as loc from './localizedConstants';
+import { SemVer } from 'semver';
+import { HttpClient } from './common/httpClient';
+import Logger from './common/logger';
+import { getErrorMessage } from './common/utils';
+import { azdataHostname, azdataReleaseJson } from './constants';
+
+interface PlatformReleaseInfo {
+	version: string; // "20.0.1"
+	link?: string; // "https://aka.ms/azdata-msi"
+}
+
+export interface AzdataReleaseInfo {
+	win32: PlatformReleaseInfo,
+	darwin: PlatformReleaseInfo,
+	linux: PlatformReleaseInfo
+}
+
+function getPlatformAzdataReleaseInfo(releaseInfo: AzdataReleaseInfo): PlatformReleaseInfo {
+	switch (os.platform()) {
+		case 'win32':
+			return releaseInfo.win32;
+		case 'linux':
+			return releaseInfo.linux;
+		case 'darwin':
+			return releaseInfo.darwin;
+		default:
+			Logger.log(loc.platformUnsupported(os.platform()));
+			throw new Error(`Unsupported AzdataReleaseInfo platform '${os.platform()}`);
+	}
+}
+
+/**
+ * Gets the release version for the current platform from the release info - throwing an error if it doesn't exist.
+ * @param releaseInfo The AzdataReleaseInfo object
+ */
+export async function getPlatformReleaseVersion(): Promise<SemVer> {
+	const releaseInfo = await getAzdataReleaseInfo();
+	const platformReleaseInfo = getPlatformAzdataReleaseInfo(releaseInfo);
+	if (!platformReleaseInfo.version) {
+		Logger.log(loc.noReleaseVersion(os.platform(), JSON.stringify(releaseInfo)));
+		throw new Error(`No release version available for platform ${os.platform()}`);
+	}
+	Logger.log(loc.latestAzdataVersionAvailable(platformReleaseInfo.version));
+	return new SemVer(platformReleaseInfo.version);
+}
+
+/**
+ * Gets the download link for the current platform from the release info - throwing an error if it doesn't exist.
+ * @param releaseInfo The AzdataReleaseInfo object
+ */
+export async function getPlatformDownloadLink(): Promise<string> {
+	const releaseInfo = await getAzdataReleaseInfo();
+	const platformReleaseInfo = getPlatformAzdataReleaseInfo(releaseInfo);
+	if (!platformReleaseInfo.link) {
+		Logger.log(loc.noDownloadLink(os.platform(), JSON.stringify(releaseInfo)));
+		throw new Error(`No download link available for platform ${os.platform()}`);
+	}
+	return platformReleaseInfo.link;
+}
+
+async function getAzdataReleaseInfo(): Promise<AzdataReleaseInfo> {
+	const fileContents = await HttpClient.getTextContent(`${azdataHostname}/${azdataReleaseJson}`);
+	try {
+		return JSON.parse(fileContents);
+	} catch (e) {
+		Logger.log(loc.failedToParseReleaseInfo(`${azdataHostname}/${azdataReleaseJson}`, fileContents, e));
+		throw Error(`Failed to parse the JSON of contents at: ${azdataHostname}/${azdataReleaseJson}. Error: ${getErrorMessage(e)}`);
+	}
+}