Simple git deployment helper script

deploy.sh

#!/usr/bin/env bash
if [ -r ./.deploy ]; then
	  echo "Reading config" >&2
	    . ./.deploy
fi

production=false

while getopts h:b:d:p opt; do
    case $opt in
        h)  host=$OPTARG;;
        b)  branch=$OPTARG;;
        d)  dir=$OPTARG;;
        p)  production=true;;
        \?) echo "Invalid option: -$OPTARG"; exit 1;;
    esac
done

if [ "$production" = true ] ; then
    if [ -z "$productionhost" ] ; then
        echo "You have requested to deploy to production, but haven't specified a productionhost"
        exit
    fi
    host=$productionhost    
fi

if [ -z "$host" ] ; then
		echo "Error: please define a host to deploy to."
		read host
fi

if [ -z "$dir" ] ; then
		echo "Error: please define a directory to deploy to."
		read dir
fi

if [ -z "$branch" ] ; then
		echo "Error: please define a branch to deploy to."
		read branch
fi

ssh $host "cd $dir && git pull origin $branch"