Fix executing NPM on Windows

monorepo/index.js

@@ -4,7 +4,7 @@
 const fs = require('fs');
 const child_process = require('child_process');
 
-const rootDir = __dirname;
+const rootDir = __dirname.replace(/\\/g, '/');
 const mainFile = rootDir + '/lib/index.js';
 
 // Check if required modules in same monorepo are available
@@ -17,18 +17,35 @@ const fileExists = (file) => {
 	return true;
 };
 
+/**
+ * Get NPM command
+ */
+function getNPMCommand() {
+	const clients = ['npm', 'npm.cmd'];
+	for (let i = 0; i < clients.length; i++) {
+		const cmd = clients[i];
+		const result = child_process.spawnSync(cmd, ['--version']);
+		if (result.status === 0) {
+			return cmd;
+		}
+	}
+	throw new Error('Cannot execute NPM commands')
+}
+
 /**
  * Build scripts, return imported main file on success
  */
 function build() {
 	return new Promise((fulfill, reject) => {
+		const npm = getNPMCommand();
+
 		// List of commands to execute
 		const commands = [];
 
 		// Build script
 		if (!fileExists(mainFile)) {
 			commands.push({
-				cmd: 'npm',
+				cmd: npm,
 				args: ['run', 'build'],
 				cwd: rootDir,
 			});
@@ -37,7 +54,7 @@ function build() {
 		// Install dependencies before building
 		if (!fileExists(rootDir + '/node_modules/typescript')) {
 			commands.unshift({
-				cmd: 'npm',
+				cmd: npm,
 				args: ['install'],
 				cwd: rootDir,
 			});

monorepo/src/helpers/dirs.ts

@@ -2,7 +2,7 @@ import fs from 'fs';
 import { dirname } from 'path';
 import type { PathList } from './types';
 
-export const fixDir = dirname(dirname(__dirname));
+export const fixDir = dirname(dirname(__dirname.replace(/\\/g, '/')));
 export const rootDir = dirname(fixDir);
 
 /**
@@ -26,7 +26,7 @@ export function addToPath(
  */
 export function pathToString(path: PathList, absolute = true): string {
 	const isAbsolute =
-		path.length && (path[0] === '' || path[0].slice(0, 1) === '/');
+		path.length && (path[0] === '' || path[0].slice(0, 1) === '/' || path[0].indexOf(':') !== -1);
 	return (isAbsolute ? '' : absolute ? rootDir + '/' : './') + path.join('/');
 }
 

monorepo/src/helpers/exec.ts

@@ -2,19 +2,41 @@ import { spawnSync } from 'child_process';
 import { pathToString, relativePath } from './dirs';
 import { PackageInfo } from './types';
 
+let npm: string;
+
+/**
+ * Get NPM command
+ */
+ function getNPMCommand(): string {
+	const clients = ['npm', 'npm.cmd'];
+	for (let i = 0; i < clients.length; i++) {
+		const cmd = clients[i];
+		const result = spawnSync(cmd, ['--version']);
+		if (result.status === 0) {
+			return cmd;
+		}
+	}
+	throw new Error('Cannot execute NPM commands')
+}
+
+
 /**
  * Run NPM command
  */
 export function runNPMCommand(workspace: PackageInfo, params: string[]): void {
+	if (npm === void 0) {
+		npm = getNPMCommand();
+	}
+
 	const cwd = pathToString(workspace.path);
-	console.log('\n' + relativePath(cwd) + ':', 'npm', params.join(' '));
+	console.log('\n' + relativePath(cwd) + ':', npm, params.join(' '));
-	const result = spawnSync('npm', params, {
+	const result = spawnSync(npm, params, {
 		cwd,
 		stdio: 'inherit',
 	});
 	if (result.status !== 0) {
 		throw new Error(
-			`Failed to run "npm ${params.join(' ')}" at ${relativePath(cwd)}`
+			`Failed to run "${npm} ${params.join(' ')}" at ${relativePath(cwd)}`
 		);
 	}
 }