kube-bash-prompt.sh

#!/bin/bash
# configures bash prompt based on current kubernetes cluster context and namespace
# based on https://pracucci.com/display-the-current-kubelet-context-in-the-bash-prompt.html

__kube_ps1()
{
  CONTEXT=$(kubectl config view | grep current-context | awk '{ print $NF }' | awk -F '.' '{ print $1 }')
  NS=$(kubectl config view $(kubectl config current-context) | grep namespace | awk '{ print $2 }')
  if [ -n "$CONTEXT" ]; then
      echo "[${CONTEXT}][${NS}]"
  fi
}

NORMAL="\[\e[00m\]"     # Normal
BLACK="\[\e[0;30m\]"    # Black
RED="\[\e[1;31m\]"      # Red
GREEN="\[\e[0;32m\]"    # Green
YELLOW="\[\e[0;33m\]"   # Yellow
BLUE="\[\e[0;34m\]"     # Blue
PURPLE="\[\e[0;35m\]"   # Purple
CYAN="\[\e[0;36m\]"     # Cyan
WHITE="\[\e[0;37m\]"    # White

export PS1="${BLUE}\h:${PURPLE}\$(__kube_ps1) ${BLUE}\W> ${NORMAL}"

# results:
# Cronos:[dev1][qa1] mydirectory>
#         ||    ||
# Hostname:[cluster][namespace] currentdir>

You have to re-source the script every time you switch to another context ?

Perhaps

# Get current context
__kube_ps1() {

# Make colors available
NORMAL="\[\033[00m\]"
BLUE="\[\033[01;34m\]"
YELLOW="\[\e[1;33m\]"
GREEN="\[\e[1;32m\]"

CONTEXT=$(kubectl config current-context)
NAMESPACE=$(kubectl config view --minify --output 'jsonpath={..namespace}')

if [ -n "$CONTEXT" ]; then
    # Parse off user from context, adjust if this is not desired
    IFS='@' read -ra ADDR <<< $CONTEXT

    # Set prompt
    export PS1="[${GREEN}${ADDR[0]}${NORMAL}: ${BLUE}${NAMESPACE}${NORMAL}]\n[\w]\n[\u@\H]\$ "
else
    # Set prompt
    export PS1="[\w]\n[\u@\H]\$ " 
fi
}
PROMPT_COMMAND="__kube_ps1"