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package forge.define
import ammonite.ops.{CommandResult, mkdir}
import forge.define.Applicative.Applyable
import forge.eval.PathRef
import forge.util.{Args, JsonFormatters}
import play.api.libs.json.{Format, Json}
import scala.annotation.compileTimeOnly
import scala.language.experimental.macros
import scala.reflect.macros.blackbox.Context
abstract class Target[+T] extends Target.Ops[T] with Applyable[T]{
/**
* What other Targets does this Target depend on?
*/
val inputs: Seq[Target[_]]
/**
* Evaluate this target
*/
def evaluate(args: Args): T
/**
* Even if this target's inputs did not change, does it need to re-evaluate
* anyway?
*/
def sideHash: Int = 0
}
object Target extends Applicative.Applyer[Target, Target, Args]{
def underlying[A](v: Target[A]) = v
type Cacher = forge.define.Cacher[Target[_]]
class Target0[T](t: T) extends Target[T]{
lazy val t0 = t
val inputs = Nil
def evaluate(args: Args) = t0
}
def apply[T](t: Target[T]): Target[T] = macro forge.define.Cacher.impl0[Target, T]
def command[T](t: T): Target[T] = macro Applicative.impl[Target, T, Args]
def apply[T](t: T): Target[T] = macro impl[Target, T, Args]
def impl[M[_], T: c.WeakTypeTag, Ctx: c.WeakTypeTag]
(c: Context)
(t: c.Expr[T])
(implicit tt: c.WeakTypeTag[M[_]]): c.Expr[M[T]] = {
forge.define.Cacher.wrapCached[M, T](c)(
Applicative.impl[M, T, Ctx](c)(t)
)
}
abstract class Ops[+T]{ this: Target[T] =>
def map[V](f: T => V) = new Target.Mapped(this, f)
def mapDest[V](f: (T, Args) => V) = new Target.MappedDest(this, f)
def filter(f: T => Boolean) = this
def withFilter(f: T => Boolean) = this
def zip[V](other: Target[V]) = new Target.Zipped(this, other)
}
def traverse[T](source: Seq[Target[T]]) = {
new Traverse[T](source)
}
class Traverse[+T](val inputs: Seq[Target[T]]) extends Target[Seq[T]]{
def evaluate(args: Args) = {
for (i <- 0 until args.length)
yield args(i).asInstanceOf[T]
}
}
class Mapped[+T, +V](source: Target[T], f: T => V) extends Target[V]{
def evaluate(args: Args) = f(args(0))
val inputs = List(source)
}
class MappedDest[+T, +V](source: Target[T], f: (T, Args) => V) extends Target[V]{
def evaluate(args: Args) = f(args(0), args)
val inputs = List(source)
}
class Zipped[+T, +V](source1: Target[T], source2: Target[V]) extends Target[(T, V)]{
def evaluate(args: Args) = (args(0), args(1))
val inputs = List(source1, source2)
}
def path(path: ammonite.ops.Path) = new Path(path)
class Path(path: ammonite.ops.Path) extends Target[PathRef]{
def handle = PathRef(path)
def evaluate(args: Args) = handle
override def sideHash = handle.hashCode()
val inputs = Nil
}
class Subprocess(val inputs: Seq[Target[_]],
command: Args => Seq[String]) extends Target[Subprocess.Result] {
def evaluate(args: Args) = {
mkdir(args.dest)
import ammonite.ops._
implicit val path = ammonite.ops.Path(args.dest, pwd)
val toTarget = () // Shadow the implicit conversion :/
val output = %%(command(args))
assert(output.exitCode == 0)
Subprocess.Result(output, PathRef(args.dest))
}
}
object Subprocess{
case class Result(result: ammonite.ops.CommandResult, dest: PathRef)
object Result{
private implicit val crFormat: Format[CommandResult] = JsonFormatters.crFormat
implicit val tsFormat: Format[Target.Subprocess.Result] = Json.format
}
}
def mapCtx[A, B](t: Target[A])(f: (A, Args) => B) = t.mapDest(f)
def zip() = new Target.Target0(())
def zip[A](a: Target[A]) = a.map(Tuple1(_))
def zip[A, B](a: Target[A], b: Target[B]) = a.zip(b)
def zip[A, B, C](a: Target[A], b: Target[B], c: Target[C]) = new Target[(A, B, C)]{
val inputs = Seq(a, b, c)
def evaluate(args: Args) = (args[A](0), args[B](1), args[C](2))
}
def zip[A, B, C, D](a: Target[A], b: Target[B], c: Target[C], d: Target[D]) = new Target[(A, B, C, D)]{
val inputs = Seq(a, b, c, d)
def evaluate(args: Args) = (args[A](0), args[B](1), args[C](2), args[D](3))
}
def zip[A, B, C, D, E](a: Target[A], b: Target[B], c: Target[C], d: Target[D], e: Target[E]) = new Target[(A, B, C, D, E)]{
val inputs = Seq(a, b, c, d, e)
def evaluate(args: Args) = (args[A](0), args[B](1), args[C](2), args[D](3), args[E](4))
}
def zip[A, B, C, D, E, F](a: Target[A], b: Target[B], c: Target[C], d: Target[D], e: Target[E], f: Target[F]) = new Target[(A, B, C, D, E, F)]{
val inputs = Seq(a, b, c, d, e, f)
def evaluate(args: Args) = (args[A](0), args[B](1), args[C](2), args[D](3), args[E](4), args[F](5))
}
def zip[A, B, C, D, E, F, G](a: Target[A], b: Target[B], c: Target[C], d: Target[D], e: Target[E], f: Target[F], g: Target[G]) = new Target[(A, B, C, D, E, F, G)]{
val inputs = Seq(a, b, c, d, e, f, g)
def evaluate(args: Args) = (args[A](0), args[B](1), args[C](2), args[D](3), args[E](4), args[F](5), args[G](6))
}
}
|
