Merge pull request #3438 from Duhemm/source-appender

[1.0.x] `Append` instance to add `File` to `Seq[Source]`

main-command/src/main/scala/sbt/Watched.scala

@@ -6,11 +6,12 @@ package sbt
 import BasicCommandStrings.ClearOnFailure
 import State.FailureWall
 import annotation.tailrec
+import java.io.File
 import java.nio.file.FileSystems
 
 import scala.concurrent.duration._
 
-import sbt.io.WatchService
+import sbt.io.{ AllPassFilter, NothingFilter, FileFilter, WatchService }
 import sbt.internal.io.{ Source, SourceModificationWatch, WatchState }
 import sbt.internal.util.AttributeKey
 import sbt.internal.util.Types.const
@@ -18,7 +19,7 @@ import sbt.internal.util.Types.const
 trait Watched {
 
   /** The files watched when an action is run with a preceeding ~ */
-  def watchSources(s: State): Seq[Source] = Nil
+  def watchSources(s: State): Seq[Watched.WatchSource] = Nil
   def terminateWatch(key: Int): Boolean = Watched.isEnter(key)
 
   /**
@@ -44,6 +45,30 @@ object Watched {
   val clearWhenTriggered: WatchState => String = const(clearScreen)
   def clearScreen: String = "\u001b[2J\u001b[0;0H"
 
+  type WatchSource = Source
+  object WatchSource {
+
+    /**
+     * Creates a new `WatchSource` for watching files, with the given filters.
+     *
+     * @param base          The base directory from which to include files.
+     * @param includeFilter Choose what children of `base` to include.
+     * @param excludeFilter Choose what children of `base` to exclude.
+     * @return An instance of `Source`.
+     */
+    def apply(base: File, includeFilter: FileFilter, excludeFilter: FileFilter): Source =
+      new Source(base, includeFilter, excludeFilter)
+
+    /**
+     * Creates a new `WatchSource` for watching files.
+     *
+     * @param base          The base directory from which to include files.
+     * @return An instance of `Source`.
+     */
+    def apply(base: File): Source =
+      apply(base, AllPassFilter, NothingFilter)
+  }
+
   private[this] class AWatched extends Watched
 
   def multi(base: Watched, paths: Seq[Watched]): Watched =

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

@@ -6,6 +6,8 @@ import scala.annotation.implicitNotFound
 import sbt.internal.util.Attributed
 import Def.Initialize
 import reflect.internal.annotations.compileTimeOnly
+import sbt.internal.io.Source
+import sbt.io.{ AllPassFilter, NothingFilter }
 
 object Append {
   @implicitNotFound(
@@ -96,4 +98,11 @@ object Append {
       def appendValue(a: Seq[T], b: Option[T]): Seq[T] = b.fold(a)(a :+ _)
       def appendValues(a: Seq[T], b: Option[T]): Seq[T] = b.fold(a)(a :+ _)
     }
+  implicit def appendSource: Sequence[Seq[Source], Seq[File], File] =
+    new Sequence[Seq[Source], Seq[File], File] {
+      def appendValue(a: Seq[Source], b: File): Seq[Source] =
+        appendValues(a, Seq(b))
+      def appendValues(a: Seq[Source], b: Seq[File]): Seq[Source] =
+        a ++ b.map(new Source(_, AllPassFilter, NothingFilter))
+    }
 }

main/src/main/scala/sbt/Keys.scala

@@ -37,7 +37,7 @@ import sbt.internal.{
   LogManager
 }
 import sbt.io.{ FileFilter, WatchService }
-import sbt.internal.io.{ Source, WatchState }
+import sbt.internal.io.WatchState
 import sbt.internal.util.{ AttributeKey, SourcePosition }
 
 import sbt.librarymanagement.Configurations.CompilerPlugin
@@ -132,8 +132,8 @@ object Keys {
   val suppressSbtShellNotification = settingKey[Boolean]("""True to suppress the "Executing in batch mode.." message.""").withRank(CSetting)
   val pollInterval = settingKey[FiniteDuration]("Interval between checks for modified sources by the continuous execution command.").withRank(BMinusSetting)
   val watchService = settingKey[() => WatchService]("Service to use to monitor file system changes.").withRank(BMinusSetting)
-  val watchSources = taskKey[Seq[Source]]("Defines the sources in this project for continuous execution to watch for changes.").withRank(BMinusSetting)
-  val watchTransitiveSources = taskKey[Seq[Source]]("Defines the sources in all projects for continuous execution to watch.").withRank(CSetting)
+  val watchSources = taskKey[Seq[Watched.WatchSource]]("Defines the sources in this project for continuous execution to watch for changes.").withRank(BMinusSetting)
+  val watchTransitiveSources = taskKey[Seq[Watched.WatchSource]]("Defines the sources in all projects for continuous execution to watch.").withRank(CSetting)
   val watchingMessage = settingKey[WatchState => String]("The message to show when triggered execution waits for sources to change.").withRank(DSetting)
   val triggeredMessage = settingKey[WatchState => String]("The message to show before triggered execution executes an action after sources change.").withRank(DSetting)