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package ch.jodersky.sbt.jni
import build._
import ch.jodersky.jni.{NativeLoader, Platform}
import sbt._
import sbt.Keys._
object JniNative extends AutoPlugin {
override def requires = plugins.JvmPlugin
object autoImport {
val jni = taskKey[File]("Builds a native library (by calling the native build tool).")
val jniPlatform = settingKey[Platform]("Platform of the system this build is running on.")
val jniBuildTool = taskKey[BuildTool]("The build tool to be used when building a native library.")
val jniLibraryPath = settingKey[String]("String that is prepended to the path of a native library when packaged.")
}
import autoImport._
lazy val settings: Seq[Setting[_]] = Seq(
sourceDirectory in jni := baseDirectory.value / "src",
target in jni := target.value / "native" / (jniPlatform in jni).value.id,
jniPlatform in jni := Platform.current.getOrElse {
sLog.value.warn("Warning: cannot determine platform! It will be set to 'unknown'.")
Platform.Unknown
},
jniBuildTool in jni := {
val tools = Seq(CMake, Autotools)
val base = (sourceDirectory in jni).value
val tool = if (base.exists && base.isDirectory) {
tools.find(t => t detect base)
} else {
None
}
tool.getOrElse(
sys.error("No supported native build tool detected. " +
s"Check that the setting 'sourceDirectory in jni' (currently $base) " +
"points to a valid directory. Supported build tools are: " +
tools.map(_.name).mkString(","))
)
},
clean in jni := {
val log = streams.value.log
val tool = try {
Some((jniBuildTool in jni).value)
} catch {
case _: Exception => None
}
tool foreach { t =>
log.debug("Cleaning native build")
t.api.clean(
(sourceDirectory in jni).value,
log
)
}
},
jni := {
val tool = (jniBuildTool in jni).value
val dir = (sourceDirectory in jni).value
val buildDir = (target in jni).value / "build"
val targetDir = (target in jni).value / "lib"
val log = streams.value.log
IO.createDirectory(buildDir)
IO.createDirectory(targetDir)
tool.api.library(dir, buildDir, targetDir, log)
},
clean := {
(clean in jni).value
clean.value
},
jniLibraryPath in jni := {
"/" + organization.value.replaceAll("\\.", "/") + "/" + name.value
},
unmanagedResourceDirectories += baseDirectory.value / "lib_native",
resourceGenerators += Def.task {
//build native library
val library = jni.value
//native library as a managed resource file
val libraryResource = (resourceManaged in Compile).value /
NativeLoader.fullLibraryPath(
(jniLibraryPath in jni).value,
(jniPlatform in jni).value
)
//copy native library to a managed resource (so it can also be loaded when not packaged as a jar)
IO.copyFile(library, libraryResource)
Seq(libraryResource)
}.taskValue
)
override lazy val projectSettings = inConfig(Compile)(settings) ++ Seq(
//don't scala version to native jars
crossPaths := false
)
}
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