feat(helm): add helm purge plugin

Add plugin yaml and kubectl plugin

618

plugins/helm-purge.yml

@@ -0,0 +1,14 @@
+# $HOME/.k9s/plugin.yml
+plugin:
+  # Issues a helm delete --purge for the resource associated with the selected pod
+  helm-purge:
+    shortCut: Ctrl-P
+    description: Helm Purge
+    scopes:
+    - po
+    command: kubectl
+    background: true
+    args:
+    - purge
+    - $NAMESPACE
+    - $NAME

plugins/kubectl/kubectl-purge

@@ -0,0 +1,29 @@
+#!/bin/bash
+usage="kubectl $(basename "$0") [-h] NAMESPACE NAME
+kubectl plugin, requires TILLER_NS set before call. Will run helm delete --purge on release associated with pod.
+Release is acquired from the pod's 'describe' information in the 'tags' section.
+Examples:
+  kubectl purge my-namespace my-namespace-pod1-123: Purge the release associated with 'my-namespace-pod1-123' pod"
+while getopts ':h' option; do
+  case "$option" in
+    h) echo "$usage"
+       exit
+       ;;
+  esac
+done
+shift $((OPTIND -1))
+
+namespace=$1
+name=$2
+if [ -z "$TILLER_NS" ]; then
+  echo "Set TILLER_NS environment variable before calling this function"
+  exit 1;
+elif [ -z "$namespace" ]; then
+  echo "No Namespace provided"
+  exit 1;
+elif [ -z "$name" ]; then
+  echo "No Name provided"
+  exit 1;
+fi
+
+kubectl describe pods -n $namespace $name | grep release | cut -f 2 -d'=' | xargs -J rel helm --tiller-namespace $TILLER_NS delete --purge rel