vagrant-watch.sh

#!/bin/bash

set -ue

usage() {
  cat <<EOT >&2
vagrant-watch.sh [vagrantfile path] [host dir] [guest dir]

Example:

  host$ vagrant-watch.sh ./Vagrantfile /tmp/foo /home/vagrant

  rsync host:/tmp/foo -> guest:/home/vagrant

  guest$ ls /home/vagrant
  foo
  guest$ ls /home/vagrant/foo
  .. foo contents ..
EOT
}

# should be set these
vagrantfile="$1"
hostdir="$2"
guestdir="$3"

hostname=`date +%s%N` # なんでもいい

ssh_config_file=`mktemp`
trap "rm -f $ssh_config_file" EXIT

hostdir=$(readlink -e -v $hostdir)
vagrantfile=$(readlink -e -v $vagrantfile)

rsync_command=$(cat <<CMD
  rsync -aq --delete -e "ssh -F $ssh_config_file" $hostdir $hostname:$guestdir
CMD
)
js=$(cat <<JS
  var fs = require('fs');
  var exec = require('child_process').exec;

  fs.watch('$hostdir', function (event, filename) {
    exec('$rsync_command', function(error, stdout, stderr){
      if (error === null) {
        console.log(new Date(), "modified");
      }else{
        console.log('exec error: ' + error);
      }
    });
  });
JS
)


echo Initializing...
echo Watching files $hostdir to vm:$guestdir


(
cd $(dirname $vagrantfile)
vagrant ssh-config --host "$hostname" > $ssh_config_file
cat <<SSH >> $ssh_config_file
  Ciphers arcfour,arcfour256
  ControlMaster auto
  ControlPath ~/.ssh/vagrant-rsync-%r@%h:%p
  ControlPersist 10
SSH

echo Ready.
node -e "$js"
)

wait