__kube_prompt.fish.custom.example1

# Inspired from:
# https://github.com/jonmosco/kube-ps1
# https://github.com/Ladicle/fish-kubectl-prompt

set -g color_blue (set_color blue)
set -g color_red (set_color DF4F2B)
set -g color_green (set_color green)

function __kube_ps_update_cache
  function __kube_ps_cache_namespace

    set -l ns (kubectl config view --minify -o 'jsonpath={..namespace}' 2>/dev/null)
    set -l ctx (kubectl config current-context)

    if string match -q "$ctx" "kind-k122"
        set -g __kube_ps_namespace "$color_green$ns"
        return
    end
        
    set -g __kube_ps_context "$color_red$ctx"
    set -g __kube_ps_namespace "$color_blue$ns"
  end

  function __stat_mtime
    #-- cross-platform workaround; POSIX didn't specify stat(1) and so
    #-- its interface is incompatibly different on Mac OS and Linux.
    #-- see https://unix.stackexchange.com/q/561927/3097
    python3 -c "print(__import__('os').stat(__import__('sys').argv[1]).st_mtime)" $argv
  end

  set -l kubeconfig "$KUBECONFIG"
  if test -z "$kubeconfig"
    set kubeconfig "$HOME/.kube/config"
  end

  if test "$kubeconfig" != "$__kube_ps_kubeconfig"
    __kube_ps_cache_namespace
    set -g __kube_ps_kubeconfig "$kubeconfig"
    set -g __kube_ps_timestamp (date +%s)
    return
  end

  for conf in (string split ':' "$kubeconfig")
    if test -r "$conf"
      if test -z "$__kube_ps_timestamp"; or test (__stat_mtime "$conf") -gt "$__kube_ps_timestamp"
        __kube_ps_cache_namespace
        set -g __kube_ps_kubeconfig "$kubeconfig"
        set -g __kube_ps_timestamp (date +%s)
        return
      end
    end
  end
end

function __kube_prompt
  if test -z "$__kube_ps_enabled"; or test $__kube_ps_enabled -ne 1
    return
  end

  __kube_ps_update_cache
  echo -n -s " (⎈ $__kube_ps_context|$__kube_ps_namespace)"
end