From 4305d94f5e01ad7fb6efc119fd0d426adb1cceef Mon Sep 17 00:00:00 2001
From: Mark Harrah <dmharrah@gmail.com>
Date: Fri, 29 Jul 2011 23:33:10 -0400
Subject: [PATCH] add convenience methods for filtering settings and keys

---
 main/Defaults.scala | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/main/Defaults.scala b/main/Defaults.scala
index e03267d1e..0cdfd519b 100644
--- a/main/Defaults.scala
+++ b/main/Defaults.scala
@@ -1031,6 +1031,9 @@ trait BuildExtra extends BuildCommon
 	/** Disables post-compilation hook for determining tests for tab-completion (such as for 'test-only').
 	* This is useful for reducing test:compile time when not running test. */
 	def noTestCompletion(config: Configuration = Test): Setting[_]  =  inConfig(config)( Seq(definedTests <<= Defaults.detectTests) ).head
+
+	def filterKeys(ss: Seq[Setting[_]], transitive: Boolean = false)(f: ScopedKey[_] => Boolean): Seq[Setting[_]] =
+		ss filter ( s => f(s.key) && (!transitive || s.dependsOn.forall(f)) )
 }
 trait BuildCommon
 {