feat(@angular-devkit/schematics-cli): auto detect package manager

packages/angular_devkit/schematics_cli/bin/schematics.ts

@@ -14,7 +14,9 @@ import { ProcessOutput, createConsoleLogger } from '@angular-devkit/core/node';
 import { UnsuccessfulWorkflowExecution } from '@angular-devkit/schematics';
 import { NodeWorkflow } from '@angular-devkit/schematics/tools';
 import * as ansiColors from 'ansi-colors';
+import { existsSync } from 'fs';
 import * as inquirer from 'inquirer';
+import * as path from 'path';
 import yargsParser, { camelCase, decamelize } from 'yargs-parser';
 
 /**
@@ -108,6 +110,45 @@ function _createPromptProvider(): schema.PromptProvider {
  };
 }
 
+function findUp(names: string | string[], from: string) {
+ if (!Array.isArray(names)) {
+ names = [names];
+ }
+ const root = path.parse(from).root;
+
+ let currentDir = from;
+ while (currentDir && currentDir !== root) {
+ for (const name of names) {
+ const p = path.join(currentDir, name);
+ if (existsSync(p)) {
+ return p;
+ }
+ }
+
+ currentDir = path.dirname(currentDir);
+ }
+
+ return null;
+}
+
+/**
+ * return package manager' name by lock file
+ */
+function getPackageManagerName() {
+ // order by check priority
+ const LOCKS: Record<string, string> = {
+ 'package-lock.json': 'npm',
+ 'yarn.lock': 'yarn',
+ 'pnpm-lock.yaml': 'pnpm',
+ };
+ const lockPath = findUp(Object.keys(LOCKS), process.cwd());
+ if (lockPath) {
+ return LOCKS[path.basename(lockPath)];
+ }
+
+ return 'npm';
+}
+
 // eslint-disable-next-line max-lines-per-function
 export async function main({
  args,
@@ -155,6 +196,7 @@ export async function main({
  dryRun,
  resolvePaths: [process.cwd(), __dirname],
  schemaValidation: true,
+ packageManager: getPackageManagerName(),
  });
 
  /** If the user wants to list schematics, we simply show all the schematic names. */