Support custom target folder for generated code

Author: jonas

sbt-scala-native-bindgen/src/main/scala/org/scalanative/bindgen/sbt/ScalaNativeBindgenPlugin.scala

@@ -30,17 +30,13 @@ import org.scalanative.bindgen.Bindgen
  *
  *  - `nativeBindgenPath`: Path to the `scala-native-bindgen` executable.
  *  - `nativeBindgenHeader`: The C header file to read.
- *
  *  - `nativeBindgenPackage`: Package of the enclosing object.
  *    No package by default.
- *
  *  - `name in nativeBindgen`: Name of the enclosing object.
- *
+ *  - `target in nativeBindgen`: Output folder of the generated code.
  *  - `version in nativeBindgen`: Version of the `scala-native-bindgen`
  *    to use when automatically downloading the executable.
- *
  *  - `nativeBindgenLink`: Name of library to be linked.
- *
  *  - `nativeBindgen`: Generate Scala Native bindings.
  *
  * @example
@@ -134,8 +130,10 @@ object ScalaNativeBindgenPlugin extends AutoPlugin {
         nativeBindgenExclude := None,
         sourceGenerators += Def.task { Seq(nativeBindgen.value) },
         name in nativeBindgen := "ScalaNativeBindgen",
+        target in nativeBindgen := sourceManaged.value / "sbt-scala-native-bindgen",
         nativeBindgen := {
-          val output = sourceManaged.value / "sbt-scala-native-bindgen" / "ScalaNativeBindgen.scala"
+          val fileName = (name in nativeBindgen).value + ".scala"
+          val output = (target in nativeBindgen).value / fileName
 
           Bindgen()
             .bindgenExecutable(nativeBindgenPath.value)

sbt-scala-native-bindgen/src/sbt-test/bindgen/generate/build.sbt

@@ -13,6 +13,9 @@ inConfig(Compile)(
     name in nativeBindgen := "AppAPI"
   ))
 
+val natigeBindgenCustomTarget = SettingKey[File]("natigeBindgenCustomTarget")
+SettingKey[File]("natigeBindgenCustomTarget") := baseDirectory.value / "src/main/scala/org/example"
+
 TaskKey[Unit]("check") := {
   val file = (nativeBindgen in Compile).value
   val expected =

sbt-scala-native-bindgen/src/sbt-test/bindgen/generate/test

@@ -1 +1,5 @@
 > check
+$ exists target/scala-2.11/src_managed/main/sbt-scala-native-bindgen/AppAPI.scala
+> set target in (Compile, nativeBindgen) := natigeBindgenCustomTarget.value
+> check
+$ exists src/main/scala/org/example/AppAPI.scala