Custom AWS prompt, configurable with aws instance variables

prompt.sh

# Custom prompt for debian/ubuntu AWS instances the default is garbage
# Works best with dark terminals, tested often with solarized dark

# Define colors
black="$(tput setaf 0)"
red="$(tput setaf 1)"
green="$(tput setaf 2)"
yellow="$(tput setaf 3)"
blue="$(tput setaf 4)"
magenta="$(tput setaf 5)"
cyan="$(tput setaf 6)"
white="$(tput setaf 7)"
peach="$(tput setaf 167)"
reset="$(tput sgr0)"

# Get some nice AWS-y info, assumes awscli is installed
AWS_INSTANCE_ID=`curl -s http://169.254.169.254/latest/meta-data/instance-id`
EC2_AVAIL_ZONE=`curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone`
EC2_REGION="`echo \"$EC2_AVAIL_ZONE\" | sed 's/[a-z]$//'`"

# If you configure aws cli, you can use the EC2_NAME as the custom tag
#EC2_NAME="$(aws ec2 describe-tags --region $EC2_REGION --filters 'Name=resource-id,Values=$AWS_INSTANCE_ID' 'Name=key,Values=Name' --output text | cut -f5)"
_PS1_CUSTOM_TAG="YOUR_TAG"


if [[ "$(id -u)" == "0" ]];
then
  # Root Prompt
  export PS1='\[$white\]{\[$peach\]$_PS1_CUSTOM_TAG\[$white\]}[\[$red\]\u\[$white\]@\h \W]\# \[$reset\]'
else
  # Regular Prompt
  export PS1='\[$white\]{\[$peach\]$_PS1_CUSTOM_TAG\[$white\]}[\[$blue\]\u\[$white\]@\h \W]\$ \[$reset\]'
fi