How do you support a Gradle Exec task for both Mac

问题:

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?

回答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'
}

回答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
       }