#!/bin/sh

#

# Copyright (c) 2009, 2014, 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

global_opts=""

status_output="/dev/stdout"

qflag="false"

vflag="false"

sflag="false"

while [ $# -gt 0 ]

do

  case $1 in

    -q | --quiet )

      qflag="true"

      global_opts="${global_opts} -q"

      status_output="/dev/null"

      ;;

    -v | --verbose )

      vflag="true"

      global_opts="${global_opts} -v"

      ;;

    -s | --sequential )

      sflag="true"

      ;;

    '--' ) # no more options

      shift; break

      ;;

    -*)  # bad option

      usage

      ;;

     * )  # non option

      break

      ;;

  esac

  shift

done

command="$1"; shift

command_args="$@"

usage() {

      echo "usage: $0 [-q|--quiet] [-v|--verbose] [-s|--sequential] [--] <command> [commands...]" > ${status_output}

      exit 1

}

if [ "x" = "x$command" ] ; then

  echo "ERROR: No command to hg supplied!"

  usage

fi

# Clean out the temporary directory that stores the pid files.

tmp=/tmp/forest.$$

rm -f -r ${tmp}

mkdir -p ${tmp}

safe_interrupt () {

  if [ -d ${tmp} ]; then

    if [ "`ls ${tmp}/*.pid`" != "" ]; then

      echo "Waiting for processes ( `cat ${tmp}/*.pid | tr '\n' ' '`) to terminate nicely!" > ${status_output}

      sleep 1

      # Pipe stderr to dev/null to silence kill, that complains when trying to kill

      # a subprocess that has already exited.

      kill -TERM `cat ${tmp}/*.pid | tr '\n' ' '` 2> /dev/null

      wait

      echo "Interrupt complete!" > ${status_output}

    fi

    rm -f -r ${tmp}

  fi

  exit 130

}

nice_exit () {

  if [ -d ${tmp} ]; then

    if [ "`ls ${tmp}`" != "" ]; then

      wait

    fi

    rm -f -r ${tmp}

  fi

}

trap 'safe_interrupt' INT QUIT

trap 'nice_exit' EXIT

subrepos="corba jaxp jaxws langtools jdk hotspot nashorn"

subrepos_extra="closed jdk/src/closed jdk/make/closed jdk/test/closed hotspot/make/closed hotspot/src/closed hotspot/test/closed deploy install sponsors pubs"

# Only look in specific locations for possible forests (avoids long searches)

pull_default=""

repos=""

repos_extra=""

if [ "${command}" = "clone" -o "${command}" = "fclone" -o "${command}" = "tclone" ] ; then

  if [ ! -f .hg/hgrc ] ; then

    echo "ERROR: Need initial repository to use this script" > ${status_output}

    exit 1

  fi

  pull_default=`hg paths default`

  if [ "${pull_default}" = "" ] ; then

    echo "ERROR: Need initial clone with 'hg paths default' defined" > ${status_output}

    exit 1

  fi

  for i in ${subrepos} ; do

    if [ ! -f ${i}/.hg/hgrc ] ; then

      repos="${repos} ${i}"

    fi

  done

  if [ "${command_args}" != "" ] ; then

    pull_default_tail=`echo ${pull_default} | sed -e 's@^.*://[^/]*/\(.*\)@\1@'`

    if [ "x${pull_default}" = "x${pull_default_tail}" ] ; then

      echo "ERROR: Need initial clone from non-local source" > ${status_output}

      exit 1

    fi

    pull_extra="${command_args}/${pull_default_tail}"

    for i in ${subrepos_extra} ; do

      if [ ! -f ${i}/.hg/hgrc ] ; then

        repos_extra="${repos_extra} ${i}"

      fi

    done

  fi

  at_a_time=2

  # Any repos to deal with?

  if [ "${repos}" = "" -a "${repos_extra}" = "" ] ; then

    echo "No repositories to process." > ${status_output}

    exit

  fi

else

  for i in . ${subrepos} ${subrepos_extra} ; do

    if [ -d ${i}/.hg ] ; then

      repos="${repos} ${i}"

    fi

  done

  # Any repos to deal with?

  if [ "${repos}" = "" ] ; then

    echo "No repositories to process." > ${status_output}

    exit

  fi

  # any of the repos locked?

  for i in ${repos} ; do

    if [ -h ${i}/.hg/store/lock -o -f ${i}/.hg/store/lock ] ; then

      locked="${i} ${locked}"

    fi

  done

  if [ "${locked}" != "" ] ; then

    echo "ERROR: These repositories are locked: ${locked}" > ${status_output}

    exit 1

  fi

  at_a_time=8

fi

# Echo out what repositories we do a command on.

echo "# Repositories: ${repos} ${repos_extra}" > ${status_output}

if [ "${command}" = "serve" ] ; then

  # "serve" is run for all the repos.

  (

    (

      (

        echo "[web]"

        echo "description = $(basename $(pwd))"

        echo "allow_push = *"

        echo "push_ssl = False"

        echo "[paths]"

        for i in ${repos} ${repos_extra} ; do

          if [ "${i}" != "." ] ; then

            echo "/$(basename $(pwd))/${i} = ${i}"

          else

            echo "/$(basename $(pwd)) = $(pwd)"

          fi

        done

      ) > ${tmp}/serve.web-conf

      echo "serving root repo $(basename $(pwd))"

      (PYTHONUNBUFFERED=true hg${global_opts} serve -A ${status_output} -E ${status_output} --pid-file ${tmp}/serve.pid --web-conf ${tmp}/serve.web-conf; echo "$?" > ${tmp}/serve.pid.rc ) 2>&1 &

    ) 2>&1 | sed -e "s@^@serve:   @" > ${status_output}

  ) &

else

  # Run the supplied command on all repos in parallel.

  n=0

  for i in ${repos} ${repos_extra} ; do

    n=`expr ${n} '+' 1`

    repopidfile=`echo ${i} | sed -e 's@./@@' -e 's@/@_@g'`

    reponame=`echo ${i} | sed -e :a -e 's/^.\{1,20\}$/ &/;ta'`

    pull_base="${pull_default}"

    for j in $repos_extra ; do

      if [ "$i" = "$j" ] ; then

          pull_base="${pull_extra}"

      fi

    done

    (

      (

        if [ "${command}" = "clone" -o "${command}" = "fclone" -o "${command}" = "tclone" ] ; then

          pull_newrepo="`echo ${pull_base}/${i} | sed -e 's@\([^:]/\)//*@\1@g'`"

          path="`dirname ${i}`"

          if [ "${path}" != "." ] ; then

            times=0

            while [ ! -d "${path}" ]   ## nested repo, ensure containing dir exists

            do

              times=`expr ${times} '+' 1`

              if [ `expr ${times} '%' 10` -eq 0 ] ; then

                echo "${path} still not created, waiting..." > ${status_output}

              fi

              sleep 5

            done

          fi

          echo "hg clone ${pull_newrepo} ${i}" > ${status_output}

          (PYTHONUNBUFFERED=true hg${global_opts} clone ${pull_newrepo} ${i}; echo "$?" > ${tmp}/${repopidfile}.pid.rc ) 2>&1 &

        else

          echo "cd ${i} && hg${global_opts} ${command} ${command_args}" > ${status_output}

          cd ${i} && (PYTHONUNBUFFERED=true hg${global_opts} ${command} ${command_args}; echo "$?" > ${tmp}/${repopidfile}.pid.rc ) 2>&1 &

        fi

        echo $! > ${tmp}/${repopidfile}.pid

      ) 2>&1 | sed -e "s@^@${reponame}:   @" > ${status_output}

    ) &

    if [ `expr ${n} '%' ${at_a_time}` -eq 0 -a "${sflag}" = "false" ] ; then

      sleep 2

      echo "Waiting 5 secs before spawning next background command." > ${status_output}

      sleep 3

    fi

    if [ "${sflag}" = "true" ] ; then

        wait

    fi

  done

fi

# Wait for all hg commands to complete

wait

# Terminate with exit 0 only if all subprocesses were successful

ec=0

if [ -d ${tmp} ]; then

  for rc in ${tmp}/*.pid.rc ; do

    exit_code=`cat ${rc} | tr -d ' \n\r'`

    if [ "${exit_code}" != "0" ] ; then

      repo="`echo ${rc} | sed -e s@^${tmp}@@ -e 's@/*\([^/]*\)\.pid\.rc$@\1@' -e 's@_@/@g'`"

      echo "WARNING: ${repo} exited abnormally." > ${status_output}

      ec=1

    fi

  done

fi

exit ${ec}