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Fixes #2302. Don't check pre and post conditions in sbt.Execute by default. 

The checking code has bad run time characteristics and would need to be fixed
for large projects with deep task dependency chains.

The code in sbt.Execute has been in production for a long time so it seems safe
enough to drop the extra checks by default. To debug issues, you can set
`-Dsbt.execute.extrachecks=true` to revert to the old behavior.
This commit is contained in:
Johannes Rudolph 2015-12-07 22:14:55 +01:00
parent 4e8d5e827e
commit 5beb602919
1 changed files with 4 additions and 4 deletions
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8
tasks/src/main/scala/sbt/Execute.scala
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@ -21,6 +21,8 @@ private[sbt] object Execute {
def config(checkCycles: Boolean, overwriteNode: Incomplete => Boolean = const(false)): Config = new Config(checkCycles, overwriteNode)
final class Config private[sbt] (val checkCycles: Boolean, val overwriteNode: Incomplete => Boolean)
final val checkPreAndPostConditions = sys.props.get("sbt.execute.extrachecks").exists(java.lang.Boolean.parseBoolean)
}
sealed trait Completed {
def process(): Unit
@ -341,8 +343,6 @@ private[sbt] final class Execute[A[_] <: AnyRef](config: Config, triggers: Trigg
def added(d: A[_]) = state contains d
def complete = state.values.forall(_ == Done)
import scala.annotation.elidable
import elidable._
@elidable(ASSERTION) def pre(f: => Unit) = f
@elidable(ASSERTION) def post(f: => Unit) = f
def pre(f: => Unit) = if (checkPreAndPostConditions) f
def post(f: => Unit) = if (checkPreAndPostConditions) f
}