I am trying to wrapper a Task class in Gradle to wrap some legacy build tools i.e. GNU Make, SCons etc. This is to help migrating legacy builds to Gradle. The idea is to still call parts of the old build systems and just to collect the artifacts from them. So instead of inheriting from DefaultTask I thought it would be easier to just to extend s…

gistfile1.groovy

class GnuMake extends DefaultTask {

  @Input
  @Optional
  List<String> targets
  
  @Input
  @Optional
  Map<String,Object> flags = [:] 
  
  @Input
  @Optional
  def switches = []

  @Input
  @Optional
  String executable
  
  ExecResult execResult
  
  GnuMake() {
    // Can make this assume certain defaults based upon the OS
    executable = executable ?: 'make'
  }

  @TaskAction 
  void exec() {
    execResult = project.exec {
      executable = this.executable
      if(this.switches) {
        args+= switches
      }
      if(this.targets) {
	      args+= targets
      }
      if(this.flags) {
	      args+= flags.collect { k,v -> "'$k=$v'" }
      }
    }
  }
  
}

// This is the basic intention with an interface for calling a legacy build
task runMake( type : GnuMake ) {
  targets = 'build', 'install'
  flags = DESTDIR : '/path/to/somewhere', BUILDNUMBER : 1234
}

A final solution is now on GitHub: https://github.com/ysb33r/Gradle/blob/master/src/main/groovy/org/ysb33r/gradle/gnumake/GnuMake.groovy