[WIP] First pass at fish shell support

[scalvert]

Adding fish shell support to notion (#152)

TODO:

• Adding a backend (fish.rs) to crates/notion-core/src/shell/, with a type Fish that implements Shell
• Adding a bootup script (notion.fish) to shell/unix/, with a wrapper function notion to get installed at console boot time
• Edit install.sh.in to include installing notion.fish to ~/.config/fish/functions

[scalvert]

@dherman any tips on tests for this?

[dherman]

@scalvert Good question. @mikrostew may have thoughts on this.

This is super exciting—thanks for working on it!

[dherman]

@scalvert Also, a heads up, I'm thinking about refactoring the directory layout so that we don't clutter the .notion directory with scripts for every shell we support. I'll comment with a link to the issue when it's filed. But don't let that block you here. That'll just be a minor refactor.

[scalvert]

Sounds good. I'm happy to move whenever.

[dherman]

@scalvert I filed issue #177 for the shell directory (and #179 is a sort of unified view of the updated directory layout). It's not implemented yet and I probably won't tackle it until after I finish #148 so it may not end up affecting this PR.

[scalvert]

okie dokie

[mikrostew]

@scalvert for testing you can add some tests like what's already there for bash:

• unit: https://github.com/notion-cli/notion/blob/master/crates/notion-core/src/shell/mod.rs#L106
• acceptance: https://github.com/notion-cli/notion/blob/master/tests/acceptance/notion_deactivate.rs#L7

[stefanpenner]

until this lands a quick hack to use notion:

set -g fish_user_paths  $HOME/.notion/bin $fish_user_paths

function notion
 $HOME/.notion/notion $argv
end