Update to VS Code 1.52.1

lib/vscode/extensions/npm/src/preferred-pm.ts

@@ -0,0 +1,80 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import findWorkspaceRoot = require('../node_modules/find-yarn-workspace-root');
+import findUp = require('find-up');
+import * as path from 'path';
+import whichPM = require('which-pm');
+import { Uri, workspace } from 'vscode';
+
+async function pathExists(filePath: string) {
+	try {
+		await workspace.fs.stat(Uri.file(filePath));
+	} catch {
+		return false;
+	}
+	return true;
+}
+
+async function isPNPMPreferred(pkgPath: string) {
+	if (await pathExists(path.join(pkgPath, 'pnpm-lock.yaml'))) {
+		return true;
+	}
+	if (await pathExists(path.join(pkgPath, 'shrinkwrap.yaml'))) {
+		return true;
+	}
+	if (await findUp('pnpm-lock.yaml', { cwd: pkgPath })) {
+		return true;
+	}
+
+	return false;
+}
+
+async function isYarnPreferred(pkgPath: string) {
+	if (await pathExists(path.join(pkgPath, 'yarn.lock'))) {
+		return true;
+	}
+
+	try {
+		if (typeof findWorkspaceRoot(pkgPath) === 'string') {
+			return true;
+		}
+	} catch (err) { }
+
+	return false;
+}
+
+const isNPMPreferred = (pkgPath: string) => {
+	return pathExists(path.join(pkgPath, 'package-lock.json'));
+};
+
+export async function findPreferredPM(pkgPath: string): Promise<{ name: string, multiplePMDetected: boolean }> {
+	const detectedPackageManagers: string[] = [];
+
+	if (await isNPMPreferred(pkgPath)) {
+		detectedPackageManagers.push('npm');
+	}
+
+	if (await isYarnPreferred(pkgPath)) {
+		detectedPackageManagers.push('yarn');
+	}
+
+	if (await isPNPMPreferred(pkgPath)) {
+		detectedPackageManagers.push('pnpm');
+	}
+
+	const pmUsedForInstallation: { name: string } | null = await whichPM(pkgPath);
+
+	if (pmUsedForInstallation && !detectedPackageManagers.includes(pmUsedForInstallation.name)) {
+		detectedPackageManagers.push(pmUsedForInstallation.name);
+	}
+
+	const multiplePMDetected = detectedPackageManagers.length > 1;
+
+	return {
+		name: detectedPackageManagers[0] || 'npm',
+		multiplePMDetected
+	};
+}