Implemented completions for various shell

[Rishik-Y]

Implements auto-completion for various shells such as Bash, fish, zsh, powershell, elvish etc

Example:

wayshot - [TAB]
-s                      --extension
-c                      --format
-l                      --output-format
-o                      --encoding
-h                      --list-outputs
-V                      --output
--clipboard             --choose-output
--log-level             --generate-completions
--slurp                 --help
--cursor                --version

or

wayshot --output-format [TAB]
jpg   png   ppm   qoi   webp  

[Rishik-Y]

This is still work in progress (Works fine with Bash but not tested yet with others), I was unable to figure put what was exactly the conflict when trying to sync no matter how much i try So figured to directly put it here and leave it to PR to show the conflict directly to me

But If anyone would like to, Do test it out and tell me its flaws :)

[Decodetalkers]

You can use the function in clap to generate completions, not by writing in hand

For example https://github.com/neocmakelsp/neocmakelsp/blob/master/src%2Fshellcomplete.rs#L1-L16

[Rishik-Y]

Hi @Decodetalkers, Could you check the code once? The only issue i seem to face was .bashrc not existing would crash the code, which was fixed by adding generate .bashrc if doesnt exist. Other than that I am pretty sure all of them work pretty fine.

[Rishik-Y]

There were 2 more shells which we can implement for using clap_complete but skipped, One being Elvish, However it seems elvish being pre-1.0 seems to have made some changes which doesnt work with current clap_complete and powershell, Which pretty sure works however i cant understand where exactly the completions are being stored since Powershell exists as pkgs for NixOS

[Decodetalkers]

There were 2 more shells which we can implement for using clap_complete but skipped, One being Elvish, However it seems elvish being pre-1.0 seems to have made some changes which doesnt work with current clap_complete and powershell, Which pretty sure works however i cant understand where exactly the completions are being stored since Powershell exists as pkgs for NixOS

I think just printing the completions is enough, if we need to install it to some place, we maybe need to think about it more. If just printing, then it is just the job of packagers.

[Gigas002]

Side note: clap_complete_nushell can be used for generating nushell completions. It's part of official clap suite too, though I don't know the reasons it's separate from clap_complete

[Rishik-Y]

Ahh! Thanks for mentioning this I Knew clap_complete_nushell existed for nushell but i just roughly saw it via here where it was showcasing as read-only making it turn off for me. But Thanks for notifying, now that i know that it exists with clap-rs and is maintained, Will start working on it in a week after my exams get over