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import sbt._
import Keys._
import java.io.File
import java.util.jar.Manifest
object NativeKeys {
val nativeBuildDirectory = settingKey[File]("Directory containing native build scripts.")
val nativeTargetDirectory = settingKey[File]("Base directory to store native products.")
val nativeOutputDirectory = settingKey[File]("Actual directory where native products are stored.")
val nativePackageUnmanagedDirectory = settingKey[File]("Directory containing external products that will be copied to the native jar.")
val nativeClean = taskKey[Unit]("Clean native build.")
val nativeBuild = taskKey[File]("Invoke native build.")
}
object NativeDefaults {
import NativeKeys._
val autoClean = Def.task {
val log = streams.value.log
val build = nativeBuildDirectory.value
Process("make distclean", build) #|| Process("make clean", build) ! log
}
val autoLib = Def.task {
val log = streams.value.log
val build = nativeBuildDirectory.value
val out = nativeOutputDirectory.value
val configure = Process(
"./configure " +
"--prefix=" + out.getAbsolutePath + " " +
"--libdir=" + out.getAbsolutePath + " " +
"--disable-versioned-lib", //Disable producing versioned library files, not needed for fat jars.
build)
val make = Process("make", build)
val makeInstall = Process("make install", build)
val ev = configure #&& make #&& makeInstall ! log
if (ev != 0)
throw new RuntimeException(s"Building native library failed. Exit code: ${ev}")
(out ** ("*.la")).get.foreach(_.delete())
out
}
val nativePackageMappings = Def.task {
val managedDir = nativeTargetDirectory.value
val unmanagedDir = nativePackageUnmanagedDirectory.value
val managed = (nativeBuild.value ** "*").get
val unmanaged = (unmanagedDir ** "*").get
val managedMappings: Seq[(File, String)] = for (file <- managed; if file.isFile) yield {
file -> ("native/" + (file relativeTo managedDir).get.getPath)
}
val unmanagedMappings: Seq[(File, String)] = for (file <- unmanaged; if file.isFile) yield {
file -> ("native/" + (file relativeTo unmanagedDir).get.getPath)
}
managedMappings ++ unmanagedMappings
}
def os = System.getProperty("os.name").toLowerCase.filter(c => !c.isWhitespace)
def arch = System.getProperty("os.arch").toLowerCase
val settings: Seq[Setting[_]] = Seq(
nativeTargetDirectory := target.value / "native",
nativeOutputDirectory := nativeTargetDirectory.value / (os + "-" + arch),
nativeClean := autoClean.value,
nativeBuild := autoLib.value,
nativePackageUnmanagedDirectory := baseDirectory.value / "lib_native",
mappings in (Compile, packageBin) ++= nativePackageMappings.value
)
}
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