A fish shell function that acts like the PROMPT_DIRTRIM variable of bash.

You can also edit the replacement text by declaring a prompt_dirtrim_text universal variable.

Run the install.sh script, it will copy the function into ~/.config/fish/functions/ and open your config.fish for you.

Usage example,

function fish_prompt
	set -U prompt_dirtrim_text '-'
	set -l prompt_pwd (prompt_dirtrim 2)

	set -l prompt_symbol '$'
	fish_is_root_user; and set prompt_symbol '#'
	set -l sep ' '

	echo -s $prompt_pwd $sep $prompt_symbol $sep
end

The snippet above will assign the retained 2 trailing directory components into a prompt_pwd local variable.

It will also replace the hidden text with '-'.

Without prompt_dirtrim:

~/foo/bar/baz $ 

With prompt_dirtrim:

-/bar/baz $ 

Feel free to open issues for suggestions and bug reports!