The Debian package installs the integration scripts for various shells
into /usr/share/ondir/integration/$SHELLNAME. Currently bash, zsh and
fish are supported.

The following describes how to enable ondir support for the various
supported shells:

 - bash: add the following line to your ~/.bashrc:

   source /usr/share/ondir/integration/bash

 - zsh: add the following to your ~/.zshrc:

   source /usr/share/ondir/integration/zsh

 - fish: run the following commands:

   mkdir -p ~/.config/fish/conf.d
   ln -s /usr/share/ondir/integration/fish \
     ~/.config/fish/conf.d/ondir_prompt_hook.fish