qllog

#!/bin/bash
# A script to make an qlens log output, and potentially mpirun on an input file, with the specified number of cores.

# check that there are two parameters following the command
if [ $# -ne 2 ]; then
    echo "Your command line should have two arguments but contains $# arguments"
    exit 1
fi
inp1=$1 # this avoids the confusing convention that '1' and '2' are variable names.
inp2=$2
# check that the first parameter ends in '.in'
# Note: quotes are used around the variable in case it is empty. It would otherwise error on and empty string.
if [ "${inp1: -3}" != '.in' ]; then
    echo "The first parameter should be an input script, ending in .in"
    exit 1
fi 

# strip off the '.in' and append '.log'
label="${inp1:0: -3}".log

echo 'Logging output to: ' $label

echo $inp2 'cores requested.'

if [ $inp2 -gt 1 ]; then
    mpirun -n $inp2 qlens $1 | tee $label
else
    qlens $1 | tee $label
fi