Add a workaround on windows.

Author: EdgarTwigg

CHANGELOG.md

@@ -1,6 +1,9 @@
 # Webtools releases
 
 ## [Unreleased]
+### Fixed
+- Workaround for a Windows issue afflicting modern node versions.
+  - Cannot run program "...\build\node-install\node\npm.cmd" ...: CreateProcess error=2, The system cannot find the file specifie
 
 ## [1.2.0] - 2025-07-28
 ### Added

build.gradle

@@ -15,6 +15,7 @@ apply from: 干.file('base/sonatype.gradle')
 dependencies {
 	// node.js
 	api 'com.github.eirslett:frontend-maven-plugin:1.15.1'
+	implementation 'com.diffplug.durian:durian-swt.os:5.0.1'
 	// static file server
 	String VER_JETTY = '11.0.25'
 	api "org.eclipse.jetty:jetty-server:$VER_JETTY"

src/main/java/com/diffplug/webtools/node/SetupCleanupNode.java

@@ -15,11 +15,13 @@
  */
 package com.diffplug.webtools.node;
 
+import com.diffplug.common.swt.os.OS;
 import com.github.eirslett.maven.plugins.frontend.lib.FrontendPluginFactory;
 import com.github.eirslett.maven.plugins.frontend.lib.InstallationException;
 import com.github.eirslett.maven.plugins.frontend.lib.ProxyConfig;
 import com.github.eirslett.maven.plugins.frontend.lib.TaskRunnerException;
 import java.io.File;
+import java.io.IOException;
 import java.io.Serializable;
 import java.nio.file.Files;
 import java.util.Collections;
@@ -55,6 +57,15 @@ protected void doStart(SetupCleanupNode key) throws TaskRunnerException, Install
 					.setNodeVersion(key.nodeVersion)
 					.setNpmVersion(key.npmVersion)
 					.install();
+			if (OS.getNative().isWindows()) {
+				// copy npm.cmd as a windows workaround
+				try {
+					Files.copy(key.installDir.toPath().resolve("node/node_modules/npm/bin/npm.cmd"),
+							key.installDir.toPath().resolve("node/npm.cmd"));
+				} catch (IOException e) {
+					throw new RuntimeException(e);
+				}
+			}
 			factory.getNpmRunner(proxyConfig, null)
 					.execute("ci", null);
 		}