#!/bin/bash
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
#    \\/     M anipulation  | Copyright (C) 2017 OpenCFD Ltd.
#-------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM.
#
#     OpenFOAM is free software: you can redistribute it and/or modify it
#     under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 3 of the License, or
#     (at your option) any later version.
#
#     OpenFOAM 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
#     for more details.
#
#     You should have received a copy of the GNU General Public License
#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     mpirunDebug
#
# Description
#     Driver script to run mpi jobs with the processes in a separate XTerm
#     or to separate log files.
#     Requires bash on all processors.
#------------------------------------------------------------------------------
usage() {
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE

Usage: ${0##*/} [OPTION] -np <N> <executable> <args>

options:
  -method=MODE  Run mode
                  (0) normal
                  (1) gdb+xterm
                  (2) gdb
                  (3) log
                  (4) log+xterm
                  (5) xterm+valgrind
                  (6) gperftools(callgrind)
  -spawn=TYPE   Spawn type: (1) local (2) remote
  -log          Alias for -method=3
  -local        Alias for -spawn=1
  -yes          Start without additional prompt
  -help         Print the usage

Invoke mpirun but with each process in a separate XTerm, or to separate logfile

USAGE
    exit 1
}

case "$(uname -s)" in
Linux)
    ECHO='echo -e'
    ;;
*)
    ECHO='echo'
    ;;
esac

unset nProcs appName appArgs
unset method spawn optNoAsk

# parse options
while [ "$#" -gt 0 ]
do
    # echo "$1" 1>&2
    case "$1" in
    -help*)
        usage
        ;;

    -method=[0-6])
        method="${1#*=}"
        ;;

    -spawn=[1-2])
        spawn="${1#*=}"
        ;;

    -log)
        method=3
        ;;

    -local)
        spawn=1
        ;;

    -yes)
        optNoAsk=true
        ;;

    -np)
        nProcs=$2
        shift
        ;;

    *)
        if [ -z "$appName" ]
        then
            appName="$1"
        else
            appArgs="${appArgs}${appArgs:+ }\"$1\""
        fi
        ;;
    esac
    shift
done

echo "nProcs=$nProcs"
echo "exec=$appName"
echo "args=$appArgs"

[ -n "$nProcs" ] || usage
[ -n "$appArgs" ] || usage
[ -n "$appName" ] || usage

exec=$(command -v $appName)
[ -x "$exec" ] || {
     echo "Cannot find executable $appName or is not executable"
     usage
}

[ -n "$PWD" ] || PWD=$(pwd)

echo "run $appArgs" > $PWD/gdbCommands
echo "where" >> $PWD/gdbCommands
echo "Constructed gdb initialization file $PWD/gdbCommands"

# Choose method
if [ -z "$method" ]
then
    $ECHO "Choose running method: 0)normal  1)gdb+xterm  2)gdb  3)log  4)log+xterm  5)xterm+valgrind  6)gperftools(callgrind): \c"
    read method
    case "$method" in
    0 | 1 | 2 | 3 | 4 | 5 | 6)
        # okay
        ;;
    *)
        usage
        ;;
    esac
fi

# Choose spawn
if [ -z "$spawn" ]
then
    $ECHO "Run all processes local or distributed? 1)local  2)remote: \c"
    read spawn
    case "$spawn" in
    1 | 2)
        # okay
        ;;
    *)
        usage
        ;;
    esac
fi


# check ~/.$WM_PROJECT/$WM_PROJECT_VERSION/
# check ~/.$WM_PROJECT/
# check <installedProject>/etc/
if [ -n "$WM_PROJECT" ]
then
    for i in \
        $HOME/.$WM_PROJECT/$WM_PROJECT_VERSION \
        $HOME/.$WM_PROJECT \
        $WM_PROJECT_DIR/etc \
        ;
    do
        if [ -f "$i/bashrc" ]
        then
            sourceFoam="$i/bashrc"
            break
        fi
    done
fi

# Construct test string for remote execution.
# Source OpenFOAM settings if OpenFOAM environment not set.
# attempt to preserve the installation directory 'FOAM_INST_DIR'
# use FOAM_SETTINGS to pass command-line settings
if [ -n "$FOAM_INST_DIR" ]
then
    sourceFoam="FOAM_INST_DIR=$FOAM_INST_DIR . $sourceFoam $FOAM_SETTINGS"
else
    sourceFoam=". $sourceFoam $FOAM_SETTINGS"
fi

echo "**sourceFoam:$sourceFoam"

rm -f $PWD/mpirun.schema
touch $PWD/mpirun.schema

proc=0
xpos=0
ypos=0
for ((proc=0; proc<$nProcs; proc++))
do
    procCmdFile="$PWD/processor${proc}.sh"
    procLog="processor${proc}.log"
    xterm="xterm -font fixed -title processor${proc} -geometry 120x15+$xpos+$ypos"

    unset node
    case "$WM_MPLIB" in
    *OPENMPI)
        node="-np 1 "
        ;;
    esac

    echo "#!/bin/bash" > $procCmdFile
    echo "$sourceFoam" >> $procCmdFile
    echo "cd $PWD" >> $procCmdFile

    case "$method" in
    0)
        echo "${node}$procCmdFile" >> $PWD/mpirun.schema
        echo "$exec $appArgs | tee $procLog" >> $procCmdFile
        ;;
    1)
        echo "${node}$xterm -e $procCmdFile" >> $PWD/mpirun.schema
        echo "gdb -command $PWD/gdbCommands $exec 2>&1 | tee $procLog"
        echo "read dummy"
        ;;
    2)
        echo "${node}$procCmdFile" >> $PWD/mpirun.schema
        echo "gdb -command $PWD/gdbCommands $exec > $procLog 2>&1"
        ;;
    3)
        echo "${node}$procCmdFile" >> $PWD/mpirun.schema
        echo "$exec $appArgs > $procLog 2>&1"
        ;;
    4)
        echo "${node}$xterm -e $procCmdFile" >> $PWD/mpirun.schema
        echo "$exec $appArgs 2>&1 | tee $procLog"
        echo "read dummy"
        ;;
    5)
        echo "${node}$xterm -e $procCmdFile" >> $PWD/mpirun.schema
        echo "valgrind --leak-check=full --show-reachable=yes $exec $appArgs 2>&1 | tee $procLog"
        echo "read dummy"
        ;;
    6)
        echo "${node}$procCmdFile" >> $PWD/mpirun.schema
        echo "CPUPROFILE=log.profiler_$proc $exec $appArgs"
        echo "pprof --callgrind $exec log.profiler_$proc > log.profiler_$proc.callgrind"
        ;;
    esac >> $procCmdFile

    chmod +x $procCmdFile

    let column=proc%6
    if [ $proc -ne 0 -a $column -eq 0 ]
    then
        ((xpos+=600))
        ((ypos=0))
    else
        ((ypos+=200))
    fi
done

for ((proc=0; proc<$nProcs; proc++))
do
    procLog="processor${proc}.log"
    echo "    tail -f $procLog"
done

unset cmd

case "$WM_MPLIB" in
*OPENMPI)
    cmd="mpirun -app $PWD/mpirun.schema </dev/null"
    ;;
MPICH)
    cmd="mpiexec"
    for ((proc=0; proc<$nProcs; proc++))
    do
        read procCmd

        procXtermCmdFile="$PWD/processor${proc}Xterm.sh"
        echo "#!/bin/sh" > $procXtermCmdFile
        echo "$procCmd" >> $procXtermCmdFile
        chmod +x $procXtermCmdFile
        if [ $proc -ne 0 ]
        then
            cmd="${cmd} :"
        fi
        cmd="${cmd} -n 1 ${procXtermCmdFile}"
    done < $PWD/mpirun.schema
    ;;
*)
    echo
    echo "Unsupported WM_MPLIB setting : $WM_MPLIB"
    usage
    exit 1
esac

echo "Constructed $PWD/mpirun.schema file."
echo
echo "    $cmd"
echo

if [ -n "$optNoAsk" ]
then
    echo "starting: " $(date '+%Y-%m-%d %H:%M:%S %z' 2>/dev/null)
    echo
else
    # Pause before running
    $ECHO "Press return to execute.\c"
    read dummy
fi

exec $cmd

#------------------------------------------------------------------------------