[ feature request ] Support fish shell

[yonas]

Describe the bug:

It appears the fish shell is not supported.

Steps to reproduce:

1. flox init
2. flox install hello
3. flox activate

Result:

❌ ERROR: Unsupported shell "/usr/bin/fish"

[vrnvu]

Hello, I've encountered the same issue and did some quick research in case anyone is wondering only bash and zsh are currently supported:

flox/cli/flox/src/commands/environment.rs

Line 379 in 2936256

enum ShellType {

[ysndr]

Hej, we are aware of the missing fish support and planning to work on it.
In the meantime you can export either FLOX_SHELL=<path to bash or zsh> to override the shell Flox uses for activation.

fish > export FLOX_SHELL=zsh
fish > flox activate 
zsh > ...

you can also have it exec a fish shell one again though aliases set in hooks would be unavailable:

FLOX_SHELL=zsh flox activate -- fish # I'm aware of the irony here :D

Mind though that "support" includes setting a prompt that shows the currently active environments, which we do not have in fish. (active environments can still be checked by inspecting e.g. $FLOX_PROMPT_ENVIRONMENTS)

[ghudgins]

parts of this work:

• generate an activation script for fish
• add manifest shell-specific section
• nice to have: language-specific flox init would need to generate shell specific scripts instead of using common
• prompting
• add / update tests
• documentation

[stahnma]

This is blocked PR #1299.