q3upgrade.java

///usr/bin/env jbang "$0" "$@" ; exit $?
//JAVA 11+

import static java.lang.System.out;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Scanner;

class q3upgrade {

    static String recipeURL = "https://raw.githubusercontent.com/quarkusio/quarkus/main/jakarta/quarkus3.yml";

    private static String OS = System.getProperty("os.name").toLowerCase();
    public static boolean isWindows() {
        return OS.contains("win");
    }
 
    
	public static void main(String[] args) throws IOException {

        if(!Files.exists(Path.of(mvnCommand()))) {
            System.err.println("Cannot locate " + mvnCommand() + ", currently only support Maven for migration. Is the current directory in root of your Quarkus project?");
            System.exit(-1);
        }

		Path tempfile = downloadRecipe();

        ProcessBuilder processBuilder = new ProcessBuilder();

        String[] command = new String[] {
                    mvnCommand(), 
                    "org.openrewrite.maven:rewrite-maven-plugin:4.36.0:run", 
                    "-Drewrite.configLocation=" + tempfile.toAbsolutePath(),
                    "-DactiveRecipes=io.quarkus.openrewrite.Quarkus3"
        };

        System.out.println("Executing:\n" + String.join(" ", command) );
        processBuilder.command(command);

        try {

            Process process = processBuilder.start();

            BufferedReader reader =
                    new BufferedReader(new java.io.InputStreamReader(process.getInputStream()));

            String line;
            while ((line = reader.readLine()) != null) {
                out.println(line);
            }

            int exitCode = process.waitFor();
            out.println("\nExited with error code : " + exitCode);

        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
	}


    private static String mvnCommand() {
        return isWindows() ? "./mvnw.cmd" : "./mvnw";
    }

    private static Path downloadRecipe() throws MalformedURLException, IOException, ProtocolException {
        URL url = new URL(recipeURL);

        out.println("Downloading " + recipeURL + " to temporary file.");

		HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
		httpConn.setRequestMethod("GET");
        Path tempfile = null;
        
		InputStream responseStream = httpConn.getResponseCode() / 100 == 2
				? httpConn.getInputStream()
				: httpConn.getErrorStream();
		try(Scanner s = new Scanner(responseStream).useDelimiter("\\A")) {
            String response = s.hasNext() ? s.next() : "";
            tempfile = Files.createTempFile("quarkus3", "yml");
            Files.writeString(tempfile,response);
        }
        return tempfile;
    }
}