Feature request: fish support

[lofidevops]

Would it be possible to also support completions in fish? https://github.com/fish-shell/fish-shell

[kislyuk]

I don't use fish, and it's not a huge priority for me right now. I intend to do some work on it since both fish and zsh are great shells, but not if it takes a lot.

With this said, I need some help from a fish expert. (ha, ha.) From what I can see in the API docs, fish has no way to specify a custom completer function at all in its completion engine: http://fishshell.com/docs/current/commands.html#complete - is this right?

[lofidevops]

I am quite new to fish I'm afraid. But on further review it looks like you may be right. The appropriate solution might be for a Python module to generate of fish completion scripts based on it's argparser, which sounds out of scope for argcomplete. The references I've found so far were:

• http://ridiculousfish.com/shell/user_doc/html/index.html#completion-own
• https://github.com/dbarnett/python-selfcompletion
• http://stackoverflow.com/questions/16657803/creating-autocomplete-script-with-sub-commands

And my own question on this topic: http://stackoverflow.com/questions/20838284/how-can-i-provide-tab-completions-to-fish-shell-from-a-python-script (current answer: stop bugging everyone and write your fish completion script :) )

I've posted a doc request/query at fish-shell: fish-shell/fish-shell#1217

[lofidevops]

See fish-shell/fish-shell#1217 (comment) for a suggestion on dynamic completions.

[kislyuk]

Cool - do you want to take a stab at adding fish support to https://github.com/kislyuk/argcomplete/blob/master/scripts/register-python-argcomplete?

[lofidevops]

I'm afraid I cannot commit to doing this - if I find some time I will submit a merge request, but if any other pescetarians are interested, please don't let me hold you up.

[Lucretiel]

I will see if I can take a stab at this. As of at least 2.0, fish's complete method does support specifying a shell function as a custom completer (http://fishshell.com/docs/2.0/commands.html#complete)

[wernight]

A simpler alternative may be to generate man page (see https://bugs.python.org/issue14102) and then ask Fish to complete from man page.

[volkov]

Following code:

function __fish_myscript_complete
    set -x _ARGCOMPLETE 1
    set -x _ARGCOMPLETE_IFS \n
    set -x _ARGCOMPLETE_SUPPRESS_SPACE 1
    set -x _ARGCOMPLETE_SHELL fish
    set -x COMP_LINE (commandline -p)
    set -x COMP_POINT (string length (commandline -cp))
    set -x COMP_TYPE
    if set -q _ARC_DEBUG
        myscript 8>&1 9>&2 1>/dev/null 2>&1
    else
        myscript 8>&1 9>&2 1>&9 2>&1
    end
end
complete -c myscript -f -a '(__fish_myscript_complete)'

in ~/.config/fish/completions/myscript.fish works fine for me.

[kislyuk]

Fish support has been released in v1.10.0, please test.