#!/bin/bash

# This shell script runs a Matlab script (making use of the JIT compiler in
# Matlab >=6.5) detached from the invoking terminal and sends an email
# notification upon completion. The email consists of execution statistics as
# well as the first 50 lines of code output. e.g., matbg foo.m bar.out
#
# Author: Joshua V. Dillon; jvdillon AAT purdue DDOT edu
# Date:   Oct. 17, 2006
#         Feb. 24, 2007

# change user parameters as appropriate
TO="xxxxxxxx@xxxxxx.xxx"

# must set the following to enable in-script alias definitions: shopt -s expand_aliases
MATLAB="/usr/local/bin/matlab"
MFLAGS="-nosplash -nodesktop"
STARTUP="run('/home/jvdillon/.matlab/startup.m')"

if [ x"$1" = x"" ]; then
	echo 'you must specify something for MATLAB to execute'
	exit
fi

if [ x"$2" != x"" ]; then
	if [ x"$1" != x"$2" ]; then
		FILEOUT=$2
	else
		echo 'you must specify a different output file'
		exit
	fi
else
	FILEOUT=/dev/null
fi

MFLAGS="$MFLAGS -r \"$STARTUP;run('${1%.m}');exit;\""


DISPLAY=
HEADER="To: <$TO>
From: Matlab <$TO>
Reply-To: Do Not Reply <donotreply@purdue.edu>
Subject: Matlab \"$1\" Completed\n\n"
TIMEOUT=`mktemp /tmp/$1.XXXXXX`
TIMEFMT='   %E\telapsed wall-time, in [hours:]minutes:seconds\\n   %S\t\telapsed (kernel) CPU-seconds\\n   %U\t\telapsed (user)   CPU-seconds\\n   %P\t\taverage CPU load'

(
	DTSTART=`date`
	# jvd: apparently this method doesn't utilize Matlab >=6.5 JIT compilier
	#/usr/bin/time -f "$TIMEFMT" -o $TIMEOUT nohup "$MATLAB" "$MFLAGS" < $1 > $FILEOUT &
	/usr/bin/time -f "$TIMEFMT" -o $TIMEOUT nohup "$MATLAB" "$MFLAGS" &> $FILEOUT &
	PID=$!
	#PIDINFO=`ps -f --no-headers -p $PID`
	echo -e "PID\t\t" $PID >> $FILEOUT
	wait $PID
	DTEND=`date`
	BODY="$1 (executed as \"$MATLAB $MFLAGS > $FILEOUT &\")\n`cat $TIMEOUT`\n   Started:\t$DTSTART\n   Ended:\t$DTEND\n"
	echo -e "$HEADER$BODY\nMatlab Output:\n\n`sed '1,13d' $FILEOUT|head -50|sed -e 's/>/ /g'`" | /usr/sbin/sendmail $TO >/dev/null
	rm $TIMEOUT
)&