Merge pull request #255 from rexberg/master

Add krbtgt (Kerberos TGT) plugin

Author: ethancedwards8

INSTALL.md

@@ -48,7 +48,7 @@ To enable plugins set up the `@dracula-plugins` option in your `.tmux.conf` file
 The order that you define the plugins will be the order on the status bar left to right.
 
 ```bash
-# available plugins: battery, cpu-usage, git, gpu-usage, ram-usage, tmux-ram-usage, network, network-bandwidth, network-ping, ssh-session, attached-clients, network-vpn, weather, time, mpc, spotify-tui, playerctl, kubernetes-context, synchronize-panes
+# available plugins: battery, cpu-usage, git, gpu-usage, ram-usage, tmux-ram-usage, network, network-bandwidth, network-ping, ssh-session, attached-clients, network-vpn, weather, time, mpc, spotify-tui, krbtgt, playerctl, kubernetes-context, synchronize-panes
 set -g @dracula-plugins "cpu-usage gpu-usage ram-usage"
 ```
 
@@ -365,6 +365,15 @@ Extract the account as a prefix to the cluster name - Available for EKS only (on
 
 ```
 set -g @dracula-kubernetes-eks-extract-account true
+```
+
+### Kerberos TGT options
+
+Set the principal to check the TGT expiration date for (with or without the REALM)
+
+```
+set -g @dracula-krbtgt-principal "principal"
+```
 
 #### continuum options
 

README.md

@@ -46,6 +46,7 @@ Configuration and options can be found at [draculatheme.com/tmux](https://dracul
 - Current kubernetes context
 - Countdown to tmux-continuum save
 - Current working directory of tmux pane
+- Kerberos TGT expiration date
 - Show your Libre Freestyle 3 readings [Setup instructions](./scripts/libre.sh)
 
 ## Compatibility

scripts/dracula.sh

@@ -8,6 +8,8 @@ source $current_dir/utils.sh
 main()
 {
   # set configuration option variables
+  show_krbtgt_label=$(get_tmux_option "@dracula-krbtgt-context-label" "")
+  krbtgt_principal=$(get_tmux_option "@dracula-krbtgt-principal" "")
   show_kubernetes_context_label=$(get_tmux_option "@dracula-kubernetes-context-label" "")
   show_only_kubernetes_context=$(get_tmux_option "@dracula-show-only-kubernetes-context" "")
   eks_hide_arn=$(get_tmux_option "@dracula-kubernetes-eks-hide-arn" false)
@@ -241,6 +243,10 @@ main()
       IFS=' ' read -r -a colors <<<$(get_tmux_option "@dracula-spotify-tui-colors" "green dark_gray")
       script="#($current_dir/spotify-tui.sh)"
 
+    elif [ $plugin = "krbtgt" ]; then
+      IFS=' ' read -r -a colors <<<$(get_tmux_option "@dracula-krbtgt-colors" "cyan dark_gray")
+      script="#($current_dir/krbtgt.sh $krbtgt_principal $show_krbtgt_label)"
+
     elif [ $plugin = "playerctl" ]; then
       IFS=' ' read -r -a colors <<<$(get_tmux_option "@dracula-playerctl-colors" "green dark_gray")
       script="#($current_dir/playerctl.sh)"

scripts/krbtgt.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+# setting the locale, some users have issues with different locales, this forces the correct one
+export LC_ALL=en_US.UTF-8
+
+principal=$1
+label=$2
+
+current_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+source $current_dir/utils.sh
+
+if [ -n "$principal" ]; then
+  _principal=$principal
+  if ! [[ "$_principal" =~ "@" ]]; then
+    _principal="$_principal@"
+  fi
+  krb_principal_tgt_cache=$(klist -lan | awk -v krb_principal="^$_principal" '$0 ~ krb_principal {print $2}')
+  if [ -n "$krb_principal_tgt_cache" ]; then
+    krb_tgt_expire=$(date '+%H:%M:%S' -d "$(klist $krb_principal_tgt_cache | awk '/krbtgt/ {print $3,$4}')")
+  else
+    krb_tgt_expire=""
+  fi
+fi
+
+main()
+{
+  # storing the refresh rate in the variable RATE, default is 5
+  RATE=$(get_tmux_option "@dracula-refresh-rate" 5)
+  OUTPUT_STRING=""
+  if [ -z "$principal" ]; then
+    OUTPUT_STRING="no principal configured"
+  fi
+
+  if [ -z "$krb_tgt_expire" ]; then
+      OUTPUT_STRING="$principal -"
+  else
+      OUTPUT_STRING="${principal} ${krb_tgt_expire}"
+  fi
+
+  if [ "$label" = "" ]; then
+    echo "${OUTPUT_STRING}"
+  else
+    echo "${label} ${OUTPUT_STRING}"
+  fi
+
+  sleep $RATE
+}
+
+# run the main driver
+main