Hi. This is the new home of [[https://gitlab.com/ambrevar/emacs-fish-completion][emacs-fish-completion]] which was previously maintained by @Ambrevar. The new maintainer is @LemonBreezes.
This package extends the ~pcomplete~ completion framework with completion from the [[http://fishshell.com/][fish shell]].
The ~fish~ shell has smart completion for a wide range of programs. ~fish~ does not require any special configuration to work with this package.
Eshell, which uses ~pcomplete~ for completion, can be made to fall back on ~fish~ when it does not find any completion candidate with its native completion support.
~M-x shell~ can be made to use ~fish~. This will disable the underlying shell completion.
** Setup
To enable fish completion in all Eshell and ~M-x shell~ buffers, add this to your Emacs configuration:
(when (and (executable-find "fish") (require 'fish-completion nil t)) (global-fish-completion-mode))
The condition will prevent the package from loading if ~fish~ is not found (change the executable name according to you local installation).
Alternatively, you can simply load the package with ~(require 'fish-completion)~ and call ~fish-completion-mode~ manually.
Optionally, if the package [[https://github.com/szermatt/emacs-bash-completion][bash-completion]] is installed, ~fish-completion-complete~ can be configured to fall back on bash to further try completing. See ~fish-completion-fallback-on-bash-p~.