Mandatory argument for script to run java program

Question

My script is called: report_startDate

It has the following line:

$JRE_ROOT/bin/java -cp /home/me/report/config/:/home/me/report/jar/reporting-1.0-SNAPSHOT.jar  com.me.project.report.Main $1

$1 makes it possible to for me to run the script as: ./report_startDate 20140717.

But the script also runs without the date. I want to make it mandatory for whoever runs this script to supply the date.

What could I replace $1 with to make it mandatory to supply date?

goldilocks · Accepted Answer · 2014-07-31 14:08:04Z

up vote 1 down vote accepted

Put this at the top:

if [ -z "$1" ]; then
    echo "Argument required."
    exit
fi

-z tests the argument string to see if it is of zero length.

If it's not zero length, execution will continue.

answered Jul 31 '14 at 14:02

goldilocks
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