run_vistrails_batch_xvfb.sh

#!/bin/sh
###############################################################################
##
## Copyright (C) 2014-2016, New York University.
## Copyright (C) 2011-2014, NYU-Poly.
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###############################################################################
#settings
LOG_DIR=/server/vistrails/logs
Xvfb_CMD=/usr/bin/Xvfb
VIRTUAL_DISPLAY=":6"
VISTRAILS_DIR=/server/vistrails/source
VT_FILE=""
WORKFLOW=""
if (("$#" > "0")); then
    VIRTUAL_DISPLAY="$1"
fi
if (("$#" > "1")); then
    VT_FILE="$2"
fi
if (("$#" > "2")); then
    WORKFLOW="$3"
fi
Xvfb_PARAM="$VIRTUAL_DISPLAY -screen 0 1280x960x24"
LOG_XVFB="$LOG_DIR/xvfb$VIRTUAL_DISPLAY.log"

#try to find Process ID of running X-Server
echo "checking if Xvfb is already running..."
echo "ps -eaf | grep $Xvfb_CMD | grep $VIRTUAL_DISPLAY | awk '{print \$2}'"
pid=`ps -eaf | grep $Xvfb_CMD | grep $VIRTUAL_DISPLAY | awk '{print \$2}'`
if [ "$pid" ]; then
    echo "Xvfb already running [pid=${pid}]"
else
    #start a virtual server
    if [ -x $Xvfb_CMD ]; then
	$Xvfb_CMD $Xvfb_PARAM>& $LOG_XVFB &
	
	sleep 5

	#Make sure it started
	pid=`ps -eaf | grep $Xvfb_CMD | grep $VIRTUAL_DISPLAY | awk '{print $2}'`
	if [ "$pid" ]; then
	    echo "done."
	else
	    echo "FAILED."
	fi
    else
	echo "Error: Could not find $Xvfb_CMD. Cannot start Xvfb."
    fi
fi
echo -n "Executing VisTrails on display $VIRTUAL_DISPLAY.0 - "
cd $VISTRAILS_DIR
export DISPLAY=$VIRTUAL_DISPLAY
python vistrails/run.py -b $VT_FILE:$WORKFLOW