New features in the fish shell

Zsh has the helpful feature to filter history entries. Defining the function zshaddhistory to stop some commands going into the history file:

zshaddhistory()
{
# Don't save run-help and kill commands and commands run in bad-stuff
[[ $1 != (run-help *|kill *|bg|fg|cd|reboot|halt) && $PWD != $HOME/bad-stuff/* ]]
}