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package mill.api
import scala.annotation.{StaticAnnotation, compileTimeOnly}
import scala.language.implicitConversions
import os.Path
/**
* Provides access to various resources in the context of a currently execution Target.
*/
object Ctx {
@compileTimeOnly("Target.ctx() / T.ctx() can only be used with a T{...} block")
@ImplicitStub
implicit def taskCtx: Ctx = ???
/** Access to the targets destination path. */
trait Dest {
def dest: os.Path
}
object Dest {
implicit def pathToCtx(path: os.Path): Dest = new Dest { def dest = path }
}
/** Access to the targets [[Logger]] instance. */
trait Log {
def log: Logger
}
object Log {
implicit def logToCtx(l: Logger): Log = new Log { def log = l }
}
/**
* Access to some internal storage dir used by underlying ammonite.
* You should not need this in a buildscript.
*/
trait Home {
def home: os.Path
}
/** Access to the current system environment settings. */
trait Env {
def env: Map[String, String]
}
trait Args {
def args: IndexedSeq[_]
}
def defaultHome = os.home / ".mill" / "ammonite"
/**
* Marker annotation.
*/
class ImplicitStub extends StaticAnnotation
}
class Ctx(
val args: IndexedSeq[_],
dest0: () => os.Path,
val log: Logger,
val home: os.Path,
val env: Map[String, String],
val reporter: Int => Option[BuildProblemReporter],
val testReporter: TestReporter
)
extends Ctx.Dest
with Ctx.Log
with Ctx.Args
with Ctx.Home
with Ctx.Env {
def dest: Path = dest0()
def length: Int = args.length
def apply[T](index: Int): T = {
if (index >= 0 && index < args.length) args(index).asInstanceOf[T]
else throw new IndexOutOfBoundsException(s"Index $index outside of range 0 - ${args.length}")
}
}
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