basic setup for Isabelle cronjob;

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Admin/cronjob/README	Tue Oct 11 20:20:32 2016 +0200
@@ -0,0 +1,13 @@
+Administrative Isabelle cronjob at TUM
+======================================
+
+- crontab: manual update on target machine
+    crontab -l
+    crontab -e
+
+- self_update: manual installation on target directory
+    cp "$ISABELLE_HOME/Admin/cronjob/self_update "$HOME/cronjob/self_update"
+
+- $HOME/cronjob/run/ -- run-time state
+
+- $HOME/cronjob/log/ -- cumulative log area

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Admin/cronjob/crontab.lxbroy10	Tue Oct 11 20:20:32 2016 +0200
@@ -0,0 +1,5 @@
+SHELL=/bin/bash
+MAILTO=wenzelm
+
+03 00 * * *       $HOME/cronjob/self_update
+17 00 * * *       $HOME/cronjob/isabelle/Admin/cronjob/main -f > $HOME/cronjob/run/main.out >> $HOME/cronjob/run/main.err

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Admin/cronjob/main	Tue Oct 11 20:20:32 2016 +0200
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+#
+# DESCRIPTION: start the main Isabelle cronjob
+
+THIS="$(cd "$(dirname "$0")"; pwd)"
+
+source "$HOME/.bashrc"
+
+"$THIS/../build" jars || exit $?
+
+exec "$THIS/../../bin/isabelle_java" isabelle.Isabelle_Cronjob "$@"

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Admin/cronjob/self_update	Tue Oct 11 20:20:32 2016 +0200
@@ -0,0 +1,14 @@
+#!/bin/bash
+#
+# self-update of the administrative isabelle repository
+#
+# Need to copy this file manually to $HOME/cronjob in order to
+# avoid overwriting the running self_update by itself!
+
+source "$HOME/.bashrc"
+
+cd "$HOME/cronjob"
+mkdir -p run log
+
+hg -R isabelle pull -q || echo "self_update pull failed"
+hg -R isabelle update -C -q || echo "self_update update failed"

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/Admin/isabelle_cronjob.scala	Tue Oct 11 20:20:32 2016 +0200
@@ -0,0 +1,43 @@
+/*  Title:      Pure/Admin/isabelle_cronjob.scala
+    Author:     Makarius
+
+Main entry point for administrative cronjob at TUM.
+*/
+
+package isabelle
+
+
+object Isabelle_Cronjob
+{
+  def main(args: Array[String])
+  {
+    Command_Line.tool0 {
+      var force = false
+      var verbose = false
+
+      val getopts = Getopts("""
+Usage: Admin/cronjob/main [OPTIONS]
+
+  Options are:
+    -f           apply force to do anything
+    -v           verbose
+""",
+        "f" -> (_ => force = true),
+        "v" -> (_ => verbose = true))
+
+      val more_args = getopts(args)
+      if (more_args.nonEmpty) getopts.usage()
+
+      if (verbose) Output.writeln("This is the Isabelle cronjob")
+
+      val rc =
+        if (force) {
+          Thread.sleep(Time.seconds(30).ms)
+          0
+        }
+        else { Output.warning("Need to apply force to do anything"); 1 }
+
+      if (rc != 0) sys.exit(rc)
+    }
+  }
+}

--- a/src/Pure/build-jars	Tue Oct 11 17:00:20 2016 +0200
+++ b/src/Pure/build-jars	Tue Oct 11 20:20:32 2016 +0200
@@ -9,6 +9,7 @@
 ## sources
 
 declare -a SOURCES=(
+  Admin/isabelle_cronjob.scala
   Concurrent/consumer_thread.scala
   Concurrent/counter.scala
   Concurrent/event_timer.scala