#!/bin/sh

bin=`dirname "$0"`
bin=`cd "$bin"; pwd`

# if no args specified, show usage
if [ $# = 0 ]; then
  echo "Usage: hadoop-ec2 COMMAND"
  echo "where COMMAND is one of:"
  echo "  create-image         create a Hadoop AMI"
  echo "  launch-cluster       launch a cluster of Hadoop EC2 instances"
  echo "  start-hadoop         start Hadoop daemons on a cluster"
  echo "  login                login to the master node of the Hadoop EC2 cluster"
  echo "  run                  'launch-cluster', 'start-hadoop', 'login'"
  echo "  terminate-cluster    terminate a cluster of Hadoop EC2 instances"
  exit 1
fi

# get arguments
COMMAND=$1
shift

if [ "$COMMAND" = "create-image" ] ; then
  . "$bin"/create-hadoop-image
elif [ "$COMMAND" = "launch-cluster" ] ; then
  . "$bin"/launch-hadoop-cluster
elif [ "$COMMAND" = "start-hadoop" ] ; then
  . "$bin"/start-hadoop
elif [ "$COMMAND" = "run" ] ; then
  . "$bin"/run-hadoop-cluster
elif [ "$COMMAND" = "login" ] ; then
  . "$bin"/login-hadoop-cluster
elif [ "$COMMAND" = "terminate-cluster" ] ; then
  . "$bin"/terminate-hadoop-cluster
fi