Question

I’d like to execute a particular bash function when I enter a new directory. Somethink like:

alias cd="cd $@ && myfunction"

$@ doesn’t work there, and adding a backslash doesn’t help. I’m also a little worried about messing with cd, and it would be nice if this worked for other commands which changed directory, like pushd and popd.

Any better aliases/commands?

Answer 1

The easiest solution I can come up with is this

myfunction() {
  if [ "$PWD" != "$MYOLDPWD" ]; then
    MYOLDPWD="$PWD";
    # strut yer stuff here..
  fi
}

export PROMPT_COMMAND=myfunction

That ought to do it. It’ll work with all commands, and will get triggered before the prompt is displayed.