Add kn command + Minor improvements

Author: andyone

.zshrc

@@ -106,6 +106,7 @@ alias ssht="ssh_multi"
 alias flat="cat_flat"
 alias ll="ls_ext"
 alias l="ls_ext"
+alias kn="k8s_namespace"
 
 # Traps
 alias git="git_trap"
@@ -414,6 +415,11 @@ function go_clone() {
 }
 
 function create_backup() {
+  if [[ $# -eq 0 ]] ; then
+    echo "Usage: bkp {file}"
+    return 0
+  fi
+
   if ! cp -rp "$1" "$1.bak" ; then
     return 1
   fi
@@ -453,13 +459,24 @@ function ssh_multi() {
 
 function cat_flat() {
   if [[ $# -lt 2 ]] ; then
-    echo "Usage: flat file"
+    echo "Usage: flat {file}"
     return 0
   fi
 
   cat $1 | tr '\n' ' ' ; echo ""
 }
 
+function k8s_namespace() {
+  if [[ $# -eq 0 ]] ; then
+    kubectl get ns -o 'jsonpath={.items[*].metadata.name}' | tr ' ' '\n' | grep -vE '(kube-.*|yandex-.*)'
+    return $?
+  fi
+
+  kubectl config set-context --current --namespace="$1"
+
+  return $?
+}
+
 function tmux_win_to_path() {
   if [[ -z "$TMUX" ]] ; then
     return 1

README.md

@@ -26,6 +26,7 @@ bash <(curl -fsSL https://andy.one/dotfiles/install.sh)
 | `dr …` | Docker `run` shortcut |
 | `de …` | Docker `exec` shortcut |
 | `k …` | `kubectl` shortcut |
+| `kn {namespace}` | Set k8s namespace |
 | `lll …` | List files and directories using [`eza`](https://github.com/eza-community/eza) |
 | `llg …` | List files and directories using [`eza`](https://github.com/eza-community/eza) with `git` status |
 | `hf …` | `grep` over zsh history |