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Provides autoconfiguration for Vaadin + Spring Boot apps for smoother DX

There is a newer version: 0.0.3

package in.virit.sb.configs;

import com.vaadin.base.devserver.ServerInfo;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.context.annotation.Configuration;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.springframework.util.FileSystemUtils;

/**
 * If Vaadin dev mode is on classpath (checked from one class), make sure a
 * production bundle is disabled. TODO add an explicit flag to bypass for come
 * test scenarios.
 */
@Configuration
@ConditionalOnClass(ServerInfo.class)
public class DevModeConfig implements BeanPostProcessor {

    private static final String classNameToTestForDevelopmentMode = "com.vaadin.base.devserver.ServerInfo";

    public DevModeConfig() {
        try {
            // Todo add a flag that would be obeyed explicitly 
            Class.forName(classNameToTestForDevelopmentMode);
            var buildInfoPath = Path.of("target/classes/META-INF/VAADIN/config/flow-build-info.json");

            try {
                // TODO figure out if the dev mode could be enforced in some other way (~ better hack for the PoC..)
                if (Files.exists(buildInfoPath) && Files.readString(buildInfoPath).contains("\"productionMode\": true")) {
                    FileSystemUtils.deleteRecursively(Path.of("target/classes/META-INF/VAADIN"));
                    Logger.getLogger(DevModeConfig.class.getName()).log(Level.INFO,
                            "Deleted packaged production bundle as going devmode.");
                }
            } catch (IOException ex) {
                Logger.getLogger(DevModeConfig.class.getName()).log(Level.SEVERE, null, ex);
            }

        } catch (ClassNotFoundException e) {
            Logger.getLogger(DevModeConfig.class.getName()).log(Level.INFO, "No Vaadin Dev Mode found on classpath.");
        }

    }

}