fish function to tail the logs from a bunch of k8s pods in a tmux window

tail-all-pods.fish

function tail-all-pods
  set kubectl $argv[1]
  set pattern $argv[2]

  echo "Using $kubectl to tail all pods matching $pattern..."

  set pods ($kubectl get pods | kng "$pattern")
  echo "will open panes to tail pods: $pods"

  if tmux list-windows | grep -q "$pattern"
    echo "killing already-open window"
    tmux kill-window -t "$pattern"
  end

  echo "opening window to tail $pods[1]"
  tmux new-window -n "$pattern" fish -c "$kubectl logs --tail=10 -f $pods[1]"
  for pod in $pods[2..-1]
    echo "opening pane to tail $pod"
    tmux split-window -f -t "$pattern" fish -c "$kubectl logs --tail=10 -f $pod"
  end

  tmux select-layout -t "$pattern" even-vertical
end