thufir@mordor:~/java$
thufir@mordor:~/java$ cat build.gradle
apply plugin: 'java'

archiveBaseName = "HelloWorld"
version = "0.5"


task hello << {
println 'hello, world'
}



jar {
  manifest {
    attributes(
      'Class-Path': configurations.compile.collect { it.getName() }.join(' ')
      'Main-Class': 'HelloWorld'
    )
  }
}
thufir@mordor:~/java$
thufir@mordor:~/java$ gradle tasks

FAILURE: Build failed with an exception.

* Where:
Build file '/home/thufir/java/build.gradle' line: 17

* What went wrong:
Could not compile build file '/home/thufir/java/build.gradle'.
> startup failed:
  build file '/home/thufir/java/build.gradle': 17: unexpected token: Main-Class @ line 17, column 7.
           'Main-Class': 'HelloWorld'
           ^

  1 error


* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 3.976 secs
thufir@mordor:~/java$