#!/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