Post-receive script for Goatee deployment, inspired by Heroku

post-receive

#!/bin/bash

# Fail fast.
set -e

# Debug.
# set -x

function indent() {
  c='s/^/       /'
  case $(uname) in
    Darwin) sed -l "$c";;
    *)      sed -u "$c";;
  esac
}

# Get state.
OLDPORT=`cat /tmp/goatee.port 2> /dev/null || echo 8000`
OLDDEPLOYDIR=`cat /tmp/goatee.dir 2> /dev/null || true`
OLDPID=`cat /tmp/goatee.pid 2> /dev/null || true`
PORT=$[ 8000 + ($OLDPORT + 100) % 1000 ]
DEPLOYDIR=`mktemp -d /tmp/goatee-$PORT-XXXXXX`

echo "-----> Copying app to a deployment directory"
git archive master | tar -x -C $DEPLOYDIR 2>&1 | indent

cd $DEPLOYDIR
echo "-----> Installing dependencies using npm"
npm install 2>&1 | indent

if [ $OLDPID ]; then
  echo "-----> Stopping old version on port $OLDPORT"
  #kill -s INT $OLDPID 2>&1 | indent # see https://github.com/ddollar/foreman/issues/235
  killall node || true
  sudo iptables -t nat -D PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports $OLDPORT 2>&1 | indent
fi

if [ $OLDDEPLOYDIR ]; then
  echo "-----> Cleaning up old version on port $OLDPORT"
  rm -rf $OLDDEPLOYDIR 2>&1 | indent
fi

echo "-----> Starting app"
foreman start -p $PORT > $DEPLOYDIR.log 2>&1 &

echo $! > /tmp/goatee.pid
echo $PORT > /tmp/goatee.port
echo $DEPLOYDIR > /tmp/goatee.dir

echo "-----> Setting up port redirection 80 <=> $PORT"
sudo iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports $PORT 2>&1 | indent