in app/lib/ConfigFinder.scala [18:24]
def configIdMapFrom(c: RevCommit)(implicit repoThreadLocal: ThreadLocalObjectDatabaseResources): Map[String, ObjectId] = {
implicit val reader = repoThreadLocal.reader()
walk(c.getTree)(configFilter).map { tw =>
val configPath = tw.slashPrefixedPath
configPath.reverse.dropWhile(_ != '/').reverse -> tw.getObjectId(0)
}.toMap
}