Automatically create/update Heroku Postgres databases locally. Add to your custom.zsh file or .bashrc. Also, add `/dumps/*` to your .gitignore if you don't want all that in your repo

pg-backup.zsh

alias pgstart="pg_ctl -D /usr/local/var/postgres -l /usr/local/var/log/postgres/server.log start"
alias pgstop="pg_ctl -D /usr/local/var/postgres stop -m fast"

# find id of last backup
__getBackupId() {
	echo $( heroku pg:backups | grep 'b\d\d\d' | head -1 | cut -b 1-6 | xargs )
}

# get the app's name from heroku info
__getAppName() {
	echo $( heroku apps:info | grep '===' | sed -e 's/^=== s*//' )
}
alias getAppName=__getAppName

# prepare the fs for download and initiate population
__hpgbackup() {
	DUMPDIR='./dumps'
	if [ ! -d "$DUMPDIR" ]; then
		mkdir "$DUMPDIR"
	fi

	BACKUPID=$( __getBackupId )
	wait
	DUMPFILE="$DUMPDIR/$BACKUPID.dump"

	echo "Do you want to build a new remote backup? "
	read response
	if [[ $response =~ ^([yY][eE][sS]|[yY])$ ]]; then
		heroku pg:backups capture
		wait
	fi

	# if it already exists...don't bother
	if [ ! -f "$DUMPFILE" ]; then
		curl -o "$DUMPFILE" `heroku pg:backups -q public-url`
	fi

	__rebuilddb "$1"
}

# Populate the db
__rebuilddb() {
	$( pg_restore --verbose --clean --no-acl --no-owner -h localhost -U $USER -d $1 $DUMPFILE )
}

# Create a the db based on the appname and proceed to populate it
__dbinit() {
	$( createdb $1 )
	__hpgbackup "$1"
}

# rebuilds the local db from the latest dump
__dbupdate() {
	echo "Are you in a Heroku Postgres project's root? "
	read response
	if [[ $response =~ ^([yY][eE][sS]|[yY])$ ]]; then
		# while we're waiting on the app name, might as well ensure the local server is running
		pgstop
		pgstart
		APPNAME=$( __getAppName )
		DBSTATUS=$( psql -l | grep '$APPNAME' );
		if [[ $DBSTATUS != '' ]]; then
			# create and populate the db
			__dbinit $APPNAME
		else
			# populate the db
			__hpgbackup $APPNAME
		fi
	else
	    echo "Move into a Heroku project with Postgres' root directory before executing."
	fi
}
alias dbupdate=__dbupdate