Add Remove instances for Set and Map

Author: DavidGregory084

main-settings/src/main/scala/sbt/Remove.scala

@@ -34,4 +34,14 @@ object Remove {
       def removeValue(a: Seq[T], b: Option[T]): Seq[T] = b.fold(a)(a filterNot _.==)
       def removeValues(a: Seq[T], b: Option[T]): Seq[T] = b.fold(a)(a filterNot _.==)
     }
+  implicit def removeSet[T, V <: T]: Sequence[Set[T], Set[V], V] =
+    new Sequence[Set[T], Set[V], V] {
+      def removeValue(a: Set[T], b: V): Set[T] = a - b
+      def removeValues(a: Set[T], b: Set[V]): Set[T] = a diff (b.toSeq: Seq[T]).toSet
+    }
+  implicit def removeMap[A, B, X <: A]: Sequence[Map[A, B], Seq[X], X] =
+    new Sequence[Map[A, B], Seq[X], X] {
+      def removeValue(a: Map[A, B], b: X): Map[A, B] = a - b
+      def removeValues(a: Map[A, B], b: Seq[X]): Map[A, B] = a -- b
+    }
 }

sbt-app/src/sbt-test/project/remove/build.sbt

@@ -1,6 +1,8 @@
 val intsTask = taskKey[Seq[Int]]("A seq of ints task")
 val intsSetting = settingKey[Seq[Int]]("A seq of ints setting")
 val intsFromScalaV = settingKey[Seq[Int]]("a seq of ints from scalaVersion")
+val intsSetSetting = settingKey[Set[Int]]("A set of ints setting")
+val stringIntMapSetting = settingKey[Map[String, Int]]("A map of string to int setting")
 
 scalaVersion := "2.11.6"
 
@@ -22,9 +24,19 @@ intsFromScalaV --= { if (scalaVersion.value == "2.11.6") Seq(1, 2) else Seq(4) }
 intsFromScalaV -= { if (scalaVersion.value == "2.11.6") Option(6) else None }
 intsFromScalaV --= { if (scalaVersion.value == "2.11.6") Option(7) else None }
 
+intsSetSetting := Set(1, 2, 3, 4, 5, 6, 7)
+intsSetSetting -= 3
+intsSetSetting --= Set(1, 2)
+
+stringIntMapSetting := Map("a" -> 1, "b" -> 2 , "c" -> 3, "d" -> 4, "e" -> 5)
+stringIntMapSetting -= "c"
+stringIntMapSetting --= Seq("a", "b")
+
 val check = taskKey[Unit]("Runs the check")
 check := {
   assert(intsTask.value == Seq(4, 5), s"intsTask should be Seq(4, 5) but is ${intsTask.value}")
   assert(intsSetting.value == Seq(4, 5), s"intsSetting should be Seq(4, 5) but is ${intsSetting.value}")
   assert(intsFromScalaV.value == Seq(4, 5), s"intsFromScalaV should be Seq(4, 5) but is ${intsFromScalaV.value}")
+  assert(intsSetSetting.value == Set(4, 5, 6, 7), s"intsSetSetting should be Set(4, 5, 6, 7) but is ${intsSetSetting.value}")
+  assert(stringIntMapSetting.value == Map("d" -> 4, "e" -> 5), s"stringIntMapSetting should be Map(d -> 4, e -> 5) but is ${stringIntMapSetting.value}")
 }