global.sbt

watchSources ~= {
  _.filterNot {
    f =>
      f.isDirectory ||
        """^\..*\.sw.$""".r.findFirstIn(f.getName).isDefined
  }
}

lazy val ghqGetDepndencies = TaskKey[Unit]("ghq-get-dependencies")

ghqGetDepndencies <<= (ivyModule, sLog) map {
  (ivy, logger) =>
    new IvyCache(None).withDefaultCache(None, logger) {
      cache =>
        ivy.moduleDescriptor(logger).getDependencies.map(_.getDependencyRevisionId).foreach {
          modRevId =>
            import scala.xml.parsing.ConstructingParser
            val path = cache.getIvyFileInCache(modRevId).getPath
            val doc = ConstructingParser.fromSource(io.Source.fromFile(s"$path.original"), preserveWS = false).document()
            val scmConnectionNode = (doc \ "scm" \ "connection")
            if (scmConnectionNode.nonEmpty) {
              val scmConnection = scmConnectionNode.text

              val pat = "^scm:(?:git|hg|svn):(.+)$".r
              scmConnection match {
                case pat(url) =>
                  logger.info(s"$modRevId :: $url")
                  Process(Seq("ghq", "get", url)) !
                case _ =>
              }
            }
        }
    }
}