thing.groovy

project.task('createAmplifyApp') {
    def npx = 'npx'

    if (project.file(gradleConfigFileName).exists()) {
        return
    }

    if (Os.isFamily(Os.FAMILY_WINDOWS)) {
        npx += '.cmd'
    }

    try {
        project.exec {
            commandLine npx, 'amplify-app', '--platform', 'android'
        }
    } catch (commandLineFailure) {
        throw new Exception('Node.js is not installed. Visit https://nodejs.org/en/download/ to install it.')
    }
}