feat(ort-utils): Handle macOS in singleContainedDirectoryOrThis()

Native macOS installations follow system placement, requiring path
adjustments not necessary on other platforms.

Signed-off-by: Helio Chissini de Castro <[email protected]>
Signed-off-by: Sebastian Schuberth <[email protected]>

Author: heliocastro

utils/ort/src/main/kotlin/JavaBootstrapper.kt

@@ -50,8 +50,10 @@ object JavaBootstrapper {
     /**
      * Return the single top-level directory contained in this directory, if any, or return this directory otherwise.
      */
-    private fun File.singleContainedDirectoryOrThis() =
-        walk().maxDepth(1).filter { it != this && it.isDirectory }.singleOrNull() ?: this
+    private fun File.singleContainedDirectoryOrThis(): File {
+        val dir = walk().maxDepth(1).filter { it != this && it.isDirectory }.singleOrNull() ?: this
+        return if (Os.isMac) dir / "Contents" / "Home" else dir
+    }
 
     /**
      * Return whether ORT is running on a JDK (not JRE) of the specified [version].