Multiple AWS accounts

# Set environment variables authorizing AWS for a specific account. Data is stored in:
# ~/.amazon_keys_[account]
# ~/.ec2_[account]/pk-*.pem
# ~/.ec2_[account]/cert-*.pem
# ~/.ec2_[account]/id_rsa-*
function aws {
  export AWS_CURRENT=$1
  
  # AWS
  if [[ -f "$HOME/.amazon_keys_$1" ]]; then
    source "$HOME/.amazon_keys_$1";
  else
    echo "No Amazon keys for $1"
  fi

  # EC2
  export EC2_HOME=~/bin/ec2-api-tools-1.3-26369
  export PATH=$PATH:$EC2_HOME/bin
  if [[ -d "$HOME/.ec2_$1" ]]; then
    export EC2_PRIVATE_KEY=`ls $HOME/.ec2_$1/pk-*.pem`;
    export EC2_CERT=`ls $HOME/.ec2_$1/cert-*.pem`;
    export EC2_KEYPAIR=`ls $HOME/.ec2_$1/id_rsa-*`;
    export EC2_KEYPAIR_NAME=`echo $EC2_KEYPAIR | sed -E 's/.*id_rsa-(.*)/\1/'`;
  else
    echo "No EC2 keys for $1"
  fi
}

# Boot an EC2 instance with the current keypair
function ec2boot {
  ec2-run-instances $1 -k $EC2_KEYPAIR_NAME
}

# ssh into an instance with the current keypair.
function ec2ssh {
  ssh -i $EC2_KEYPAIR root@$1
}

# Display the current AWS account set via aws.
alias awswho='echo $AWS_CURRENT'