How do you support a Gradle Exec task for both Mac and PC?

Question

Is there a way to be able to execute a task on both Windows and Mac if the commands take a different form? For example:

task stopTomcat(type:Exec) {

    // use this command line if on Windows
    commandLine 'cmd', '/c', 'stop.cmd'

    // use the command line if on Mac
    commandLine './stop.sh'
}

How would you do this in Gradle?

Answer 1

You can conditionally set the commandLine property based on the value of a system property.

if (System.getProperty('os.name').toLowerCase(Locale.ROOT).contains('windows')) {
    commandLine 'cmd', '/c', 'stop.cmd'
} else {
    commandLine './stop.sh'
}

Answer 2

If the script or executable were the same on windows and linux then you'd be able to do the following so that you only have to define the arguments once by calling a function like so:

       import org.apache.tools.ant.taskdefs.condition.Os       

       task executeCommand(type: Exec) {    
            commandLine osAdaptiveCommand('aws', 'ecr', 'get-login', '--no-include-email')
       }

       private static Iterable<String> osAdaptiveCommand(String... commands) {
            def newCommands = []
            if (Os.isFamily(Os.FAMILY_WINDOWS)) {
                newCommands = ['cmd', '/c']
            }

            newCommands.addAll(commands)
            return newCommands
       }

Answer 3

I referred to here. https://stackoverflow.com/a/31443955/1932017

import org.gradle.nativeplatform.platform.internal.DefaultNativePlatform

task stopTomcat(type:Exec) {
    if (DefaultNativePlatform.currentOperatingSystem.isWindows()) {
        // use this command line if on Windows
        commandLine 'cmd', '/c', 'stop.cmd'
    } else {
        // use the command line if on Mac
        commandLine './stop.sh'
    }
}