Website tweaks

project/Cmd.scala

@@ -0,0 +1,40 @@
+package docspell.build
+
+import sbt._
+import scala.sys.process._
+import java.util.concurrent.atomic.AtomicReference
+
+/** Helper for running external commands. */
+object Cmd {
+
+  case class Result(rc: Int, out: String, err: String) {
+
+    def throwIfNot(success: Int): Result =
+      if (rc != success) sys.error(s"Unsuccessful return: $rc")
+      else this
+  }
+
+  def run(cmd: Seq[String], wd: File, logger: Logger): Unit = {
+    val res = Cmd.exec(cmd, Some(wd))
+    logger.info(res.out)
+    logger.error(res.err)
+    res.throwIfNot(0)
+  }
+
+  def exec(cmd: Seq[String], wd: Option[File]): Result = {
+    val capt = new Capture
+    val rc   = Process(cmd, wd).!(capt.logger)
+    Result(rc, capt.out.get.mkString("\n"), capt.err.get.mkString("\n"))
+  }
+
+  final private class Capture {
+    val err = new AtomicReference[List[String]](Nil)
+    val out = new AtomicReference[List[String]](Nil)
+
+    val logger = ProcessLogger(
+      line => out.getAndAccumulate(List(line), _ ++ _),
+      line => err.getAndAccumulate(List(line), _ ++ _)
+    )
+
+  }
+}