Bash functions for easier use of CF CLI

bash_rc_sourceme.sh

# 
# Some bash functions to help use the cf cli more easily
# Include in your .bashrc directly or place in another file and source
#

#
# cfhome
#
# Get a new cf home
# Use no args to get a uniquely-scoped home
#   cfhome
# Provide a name arg to have a persistent and shareable home across terms
#   cfhome dev
#   cfhome https://api.sys.itardev.dg-south-01.satcloud.space
#
# If argument is a URL, will invoke cf api on it
# If argument provided and session not in
#
function cfhome
{
  if [[ $# -eq 0 ]]; then
    randy=$(dd if=/dev/urandom | tr -dc A-Za-z0-9 | head -c32)
    CF_HOME="/tmp/.cfhome__${api}__${randy}"
  elif [[ $1 =~ ^https\:\/\/ ]]; then
    CF_HOME=${HOME}/.cfhome__${1}
    cf api $1
  else
    CF_HOME=${HOME}/.cfhome__${1}
  fi

  mkdir -p $CF_HOME
  export CF_HOME

  # Get cf vars available, make cf calls to "furnish" our home if needed
  setCfVars
  if [[ -z "${cf_api}" ]] || [[ -z "${cf_user}" ]]; then
    cf login
  fi

} # cfhome

#
# cfhomes
#
# Get a list of your homes
#
function cfhomes
{
  for i in $HOME/.cfhome__*; do
    [[ "$i" =~ .cfhome__([a-zA-Z0-9_\-\.]+) ]] && echo ${BASH_REMATCH[1]}
  done
}

#
# cfprompt
#
# Make your prompt have the cf_* vars set by setCfVars
# Please feel free to customize your own
# In PS1, the first funky escape chars set terminal title
#         the later ones are setting color (see http://bashrcgenerator.com)
#
# To undo
#   cfprompt off
#
function cfprompt
{
  if [[ "$1" == "off" ]]; then
    unset PROMPT_COMMAND
    PS1=$CFPROMPT_OLD_PS1
    return
  fi

  CFPROMPT_OLD_PS1=$PS1
  PROMPT_COMMAND='setCfVars; echo -ne "\033]0;${cf_api:-noapi} ${cf_org:-noorg} ${cf_space:-nospace}\007"; PS1="\[\033[38;5;10m\]${cf_api:-noapi} ${cf_user:-nouser}\[$(tput sgr0)\] $cf_org $cf_space > "'

} # cfprompt

#
# Helper to have cf_api, cf_user, cf_org, and cf_space be set when available
# Are updated before prompt PS1 is reevaluated
#
function setCfVars () {

  unset cf_api
  unset cf_org
  unset cf_space
  unset cf_user

  # Look for .cf dir in CF_HOME if set, otherwise HOME
  cfConfigJson="${CF_HOME:-$HOME}/.cf/config.json"

  # If not found, punch out
  [[ -e "$cfConfigJson" ]] || return

  # Get info from file

  # Using awk to strip https://
  result=$(jq -r '. | .Target' $cfConfigJson | awk -F/ '{print $3}')
  [[ -z "$result" ]] || cf_api=$result

  result=$(jq -r '. | .OrganizationFields.Name' $cfConfigJson)
  [[ -z "$result" ]] || cf_org=$result

  result=$(jq -r '. | .SpaceFields.Name' $cfConfigJson)
  [[ -z "$result" ]] || cf_space=$result


  # Since user (if set) is embedded in a jwt token, use cf cli to get user from it
  #  Only do this if cf_api is set, other
  if command -v cf > /dev/null 2>&1 ; then
    [[ $(cf target 2>/dev/null) =~ User\:[[:space:]]+([a-zA-Z0-9_\-]+) ]] && cf_user=${BASH_REMATCH[1]}
  else
    return
  fi

  export cf_api
  export cf_org
  export cf_space
  export cf_user

} # setCfVars