verify

#!/bin/sh
exec scala "$0" "$@"
!#

import scala.io.Source
import scala.sys.process.Process

implicit class ArrayOps[A](args: Array[A]) {
  def get(n: Int): Option[A] = if (args isDefinedAt n) Some(args(n)) else None
}

val branch = args get 0 getOrElse sys.error("Missing argument for branch!")
val takeCount = args get 1 map (_.toInt) getOrElse Int.MaxValue

Process(s"git checkout $branch").!!
val commitIds = (Source fromString Process("git log --oneline").!!).getLines.toVector filterNot (_.contains("verify:ignore")) map (_ take 7)

val verify =
  (Process("sbt clean") /: (commitIds.init take takeCount).reverse) { (process, commitId) =>
    process #&& Process(s"git checkout $commitId") #&& Process("sbt clean test")
  }

if (verify.! == 0) {
  Process(s"git checkout $branch").!!
  println("Successfully verified.")
} else println("Verification failed!")