Difference between process.run() and process.start() in flutter

In Dart, the Process.run() and Process.start() methods are used to execute external processes, but they have some differences in their behavior and the way they handle process execution.

Process.run(): This method executes the process and waits for it to complete before returning a ProcessResult object. The ProcessResult object contains the process's exit code, standard output, and standard error.

import 'dart:io';

void main() {
  Process.run('your_process_command', []).then((ProcessResult result) {
    print('Exit code: ${result.exitCode}');
    print('STDOUT: ${result.stdout}');
    print('STDERR: ${result.stderr}');
  }).catchError((e) {
    print('Error running process: $e');
  });
}

The Process.run() method is useful when you need to run a process and wait for its completion before proceeding with further actions based on the process's output or exit code.

Process.start(): This method starts the process but does not wait for it to complete. It returns a Future object, which can be used to interact with the running process, read its output, or wait for its completion.

import 'dart:io';

void main() {
  Process.start('your_process_command', []).then((Process process) {
    process.stdout.transform(utf8.decoder).listen((data) {
      print('STDOUT: $data');
    });

    process.stderr.transform(utf8.decoder).listen((data) {
      print('STDERR: $data');
    });

    process.exitCode.then((exitCode) {
      print('Exit code: $exitCode');
    });
  }).catchError((e) {
    print('Error starting process: $e');
  });
}

The Process.start() method is useful when you want to start a process and asynchronously handle its output or interact with it while it's running. You can listen to the stdout and stderr streams of the Process object and wait for the process to complete using the exitCode future.

In summary, Process.run() is a synchronous method that waits for the process to complete and returns the result, while Process.start() is an asynchronous method that starts the process and allows you to interact with it while it's running. Choose the appropriate method based on your specific requirements and whether you need to wait for the process's completion or handle it asynchronously.