remove plugin dependencies

1 files changed, 41 insertions, 0 deletions

diff --git a/project/jni.scala b/project/jni.scala
new file mode 100644
index 0000000..7cde93b
--- /dev/null
+++ b/project/jni.scala
@@ -0,0 +1,41 @@
+import sbt._
+import Keys._
+import NativeKeys._
+
+object JniKeys {
+  val jdkHome = settingKey[File]("Home of JDK.")
+  val javahHeaderDirectory = settingKey[File]("Directory where generated javah header files are placed.")
+  val javahClasses = settingKey[Seq[String]]("Fully qualified names of classes containing native declarations.")
+  val javahClasspath = taskKey[Seq[File]]("Classpath to use in javah.")
+  val javah = taskKey[Seq[File]]("Generate JNI headers.")
+}
+
+object JniDefaults {
+  import JniKeys._
+
+  val defaultSettings: Seq[Setting[_]] = Seq(
+    jdkHome := file(sys.env("JAVA_HOME")),
+    javahHeaderDirectory := (sourceManaged in Native).value / "javah",
+    javah := javahImpl.value, 
+    sourceGenerators in Native <+= javah map { headers => headers},
+    includeDirectories in Native += javahHeaderDirectory.value,
+    includeDirectories in Native += jdkHome.value / "include")
+
+  def javahImpl = Def.task {
+    val cps = javahClasspath.value
+    val cp = cps.mkString(":")
+    for (clazz <- javahClasses.value) {
+      val parts = Seq(
+        "javah",
+        "-d", javahHeaderDirectory.value,
+        "-classpath", cp,
+        clazz)
+      val cmd = parts.mkString(" ")
+      val ev = Process(cmd) ! streams.value.log
+      if (ev != 0) throw new RuntimeException("Error occured running javah.")
+    }
+    IO.listFiles(javahHeaderDirectory.value)
+  }
+  
+}
+