Add a virtualhost for MAMP and local domain in /etc/hosts in one command.

mamp-add-virtualhost.sh

#!/bin/bash

if [ -z $1 ]
then
  read -e -p "Please enter your local domain name: " DOMAIN
	if [ -z $DOMAIN ]
	then
		echo "You must specify a local domain name (example: name.dev)."
		exit 1
	fi
else
	DOMAIN=$1
fi

if [ -z $2 ]
then
	read -e -p "Enter the path for the virtualhost [$PWD]: " DIR
	if [ -z $DIR ]
	then
		DIR=$PWD
	fi
else
	DIR=$2
fi

DOEXIST=`cat /etc/hosts | grep "$DOMAIN"`
if [ "$DOEXIST" != "" ]
	then
	echo ""
	echo "This domain looks like it's already in /etc/hosts."
	echo "Better check this manually. I'm a coward."
	exit 1
fi

# INSERT ENTRY IN /ETC/HOSTS
line=`cat /etc/hosts | grep "MAMP VirtualHosts" -n`
arr=($(echo $line | tr ":" "\n"))
n=$[${arr[0]}+1]
sudo sed -i '' $n'i\
127.0.0.1	'$DOMAIN'
' /etc/hosts

echo "Added local redirection to \""$DOMAIN"\" in /etc/hosts"

# ADD VIRTUALHOST TO APACHE'S MAMP
echo "<VirtualHost *:80>
    DocumentRoot $DIR/
    ServerName $DOMAIN
</VirtualHost>" >> /Applications/MAMP/conf/apache/extra/httpd-vhosts.conf

echo "Added VirtualHost in /Applications/MAMP/conf/apache/extra/httpd-vhosts.conf"

# RESTART APACHE'S MAMP
sudo /Applications/MAMP/bin/apache2/bin/apachectl restart

echo "Done."