PostgreSQl - creatdb with shell script

Question

I have a small shell script thats gets triggerd by another script via ssh.

#!/bin/bash

if [ -z $1 ]
    then
echo "Missing DB Name!"
exit 1
    else 
    PROJECT=$1
fi

createdb -U postgres -T mytemplate -O myuser $PROJECT_dev

The problem is that the createdb statement doesent sees the $PROJECT variable. It's always empty when the script gets called.

I have no idea why.

Answer 1

Use curly brackets to delimit your actual variable:

createdb -U postgres -T mytemplate -O myuser ${PROJECT}_dev

otherwise, bash thinks the whole "PROJECT_dev" is your variable.