How to run NPM Command in Java using Process Builder

Question

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import         


        

Answer 1

The problem is that ProcessBuilder does not respect the PATHEXT variable on Windows.

It's true there is no npm binary on Windows, there's a npm.cmd. My best solution is to check the platform. Something like this:

static boolean isWindows() {
    return System.getProperty("os.name").toLowerCase().contains("win");
}

static String npm = isWindows() ? "npm.cmd" : "npm";

static void run() {
    Process process = new ProcessBuilder(npm, "update")
            .directory(navigatePath)
            .start()
}