Use macro annotation to load native library

This also removes the need for third projects to depend on a "loader library".

1 files changed, 31 insertions, 0 deletions

diff --git a/macros/src/main/scala/ch/jodersky/jni/util/PlatformMacros.scala b/macros/src/main/scala/ch/jodersky/jni/util/PlatformMacros.scala
new file mode 100644
index 0000000..a4af100
--- /dev/null
+++ b/macros/src/main/scala/ch/jodersky/jni/util/PlatformMacros.scala
@@ -0,0 +1,31 @@
+package ch.jodersky.jni
+package util
+
+import scala.language.experimental.macros
+
+import scala.reflect.macros.whitebox.Context
+
+object PlatformMacros {
+
+  // arch-kernel
+  def current(c: Context): c.Expr[String] = {
+    import c.universe._
+    val result = q"""
+      val line = try {
+        scala.sys.process.Process("uname -sm").lineStream.head
+      } catch {
+        case ex: Exception => sys.error("Error running `uname` command")
+      }
+      val parts = line.split(" ")
+      if (parts.length != 2) {
+        sys.error("Could not determine platform: 'uname -sm' returned unexpected string: " + line)
+      } else {
+        val arch = parts(1).toLowerCase.replaceAll("\\s", "")
+        val kernel = parts(0).toLowerCase.replaceAll("\\s", "")
+        arch + "-" + kernel
+      }
+      """
+    c.Expr[String](result)
+  }
+
+}