--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/scripts/hgforest.sh	Wed Dec 22 12:25:52 2010 -0800
@@ -0,0 +1,104 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+# Shell script for a fast parallel forest command
+
+tmp=/tmp/forest.$$
+rm -f -r ${tmp}
+mkdir -p ${tmp}
+
+# Remove tmp area on A. B. Normal termination
+trap 'rm -f -r ${tmp}' KILL
+trap 'rm -f -r ${tmp}' EXIT
+
+# Only look in specific locations for possible forests (avoids long searches)
+pull_default=""
+if [ "$1" = "clone" -o "$1" = "fclone" ] ; then
+  subrepos="corba jaxp jaxws langtools jdk hotspot"
+  if [ -f .hg/hgrc ] ; then
+    pull_default=`hg paths default`
+  fi
+  if [ "${pull_default}" = "" ] ; then
+    echo "ERROR: Need initial clone with 'hg paths default' defined"
+    exit 1
+  fi
+  repos=""
+  for i in ${subrepos} ; do
+    if [ ! -f ${i}/.hg/hgrc ] ; then
+      repos="${repos} ${i}"
+    fi
+  done
+  at_a_time=2
+else
+  hgdirs=`ls -d ./.hg ./*/.hg ./*/*/.hg ./*/*/*/.hg ./*/*/*/*/.hg 2>/dev/null`
+  # Derive repository names from the .hg directory locations
+  repos=""
+  for i in ${hgdirs} ; do
+    repos="${repos} `echo ${i} | sed -e 's@/.hg$@@'`"
+  done
+  at_a_time=8
+fi
+
+# Any repos to deal with?
+if [ "${repos}" = "" ] ; then
+  echo "No repositories to process."
+  exit
+fi
+
+# Echo out what repositories we will process
+echo "# Repos: ${repos}"
+
+# Run the supplied command on all repos in parallel, save output until end
+n=0
+for i in ${repos} ; do
+  echo "Starting on ${i}"
+  n=`expr ${n} '+' 1`
+  (
+    (
+      if [ "$1" = "clone" -o "$1" = "fclone" ] ; then
+        cline="hg $* ${pull_default}/${i} ${i}"
+        echo "# ${cline}"
+        ( eval "${cline}" )
+      else
+        cline="hg $*"
+        echo "# cd ${i} && ${cline}"
+        ( cd ${i} && eval "${cline}" )
+      fi
+      echo "# exit code $?"
+    ) > ${tmp}/repo.${n} 2>&1 ; cat ${tmp}/repo.${n} ) &
+  if [ `expr ${n} '%' ${at_a_time}` -eq 0 ] ; then
+    sleep 5
+  fi
+done
+
+# Wait for all hg commands to complete
+wait
+
+# Cleanup
+rm -f -r ${tmp}
+
+# Terminate with exit 0 all the time (hard to know when to say "failed")
+exit 0
+