Spacefish doesn't like Raspberries 🍓

[Snuggle]

Bug Report

Current Behavior
Installing Spacefish using fisherman causes the prompt to be totally unusable and broken due to some errors displaying the git section(s) on my Raspberry Pi Model B rev2.0.

Most likely a Fish version incompatibility.

Expected Behavior
Spacefish should either check Fish version and disable incompatible sections or potentially display a warning about an incompatible version?

Pastebin
https://pastebin.com/sE9GgcH7

Environment

• Spacefish version: N/A, non-functional prompt
• Fish version: fish v2.4.0
• Fish plugin manager: fisherman
• Terminal emulator: kitty, over SSH
• Operating system: Raspbian 9.4 (stretch) armv6l, kernel 4.14.52+

Possible Solution
It seems to be complaining about line 84 in __sf_section_git_status.fish.

I'm also not exactly sure what the purpose of line 31 in __sf_section_git.fish. What's fff? Did someone fall asleep on their keyboard? 😋

This is most likely a problem with fish <2.7.0.
Sadly v2.4.0 is the latest available version in Raspbian repositories. Perhaps there should be a note in the README.md to not use on Raspbian/Debian, since this fully breaks people's prompt?

Or would it be possible to add a check to disable the git section if an old version of Fish is detected? This would at least prevent people's prompt from breaking.

Additional context/Screenshots
Everything is the newest version available for Raspbian. Fresh installation, less than 1 day old.

[matchai]

It appears the string upper method is causing the issue, which was added in fish 2.7.0.

It appears the latest Fish is available for Debian on the shells:fish:release:2 repository. Details here: https://software.opensuse.org/download.html?project=shells%3Afish%3Arelease%3A2&package=fish

With regard to __sf_section_git.fish line 31, "fff" is the white hexcode, which is used for the bright white color fallback.

I think a fish version check is a good idea, and could be referenced in a standalone issue. 😄