Support repositories in fish tab completion

[SanskritFritz]

Now that soon we'll have awesome zsh completions, it is time to make fish completions more awesome.

[codecov-commenter]

Codecov Report

Merging #5256 into master will decrease coverage by 0.10%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5256      +/-   ##
==========================================
- Coverage   83.75%   83.65%   -0.11%     
==========================================
  Files          37       37              
  Lines        9789     9953     +164     
  Branches     1622     1655      +33     
==========================================
+ Hits         8199     8326     +127     
- Misses       1113     1144      +31     
- Partials      477      483       +6     

Impacted Files	Coverage Δ
src/borg/helpers/process.py	65.43% <0.00%> (-13.47%)	⬇️
src/borg/helpers/msgpack.py	84.90% <0.00%> (-2.72%)	⬇️
src/borg/helpers/parseformat.py	89.00% <0.00%> (-1.36%)	⬇️
src/borg/helpers/fs.py	86.66% <0.00%> (-1.01%)	⬇️
src/borg/repository.py	84.04% <0.00%> (-0.29%)	⬇️
src/borg/crypto/keymanager.py	91.01% <0.00%> (-0.16%)	⬇️
src/borg/remote.py	79.83% <0.00%> (-0.04%)	⬇️
src/borg/archiver.py	81.27% <0.00%> (-0.02%)	⬇️
src/borg/constants.py	100.00% <0.00%> (ø)
src/borg/helpers/errors.py	100.00% <0.00%> (ø)
... and 10 more

---

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[ThomasWaldmann]

similar here: can we have a better commit comment?

i guess it can now complete archives by looking into the repo.
does it also complete repos if they are local dirs? but not if they are remote ssh:// repos, right?

[SanskritFritz]

Completing archives was already supported. This rewrite allows completion of local directories as repositories and offers ssh hosts as possible remote locations.
How do I change the commit comment?

[ThomasWaldmann]

I usually use something like git rebase -i BASEBRANCH to do all sorts of changes, including rewording of commit comments.

[SanskritFritz]

I don't know if that is OK now, there are 3 commits now o_O
I can start it all over if you want to.

[ThomasWaldmann]

I've squashed the commits together, thanks!

[ThomasWaldmann]

Added a backport to 1.1-maint label here, as discussed in #5255. Be careful, that is stable branch,

[ThomasWaldmann]

guess this is one of the last pieces missing for 1.1.14.

[SanskritFritz]

Sorry I misunderstood you earlier, I thought you did the backport. Hang on, I'm on it, just a little later today.

[ThomasWaldmann]

Would be great if you could do it, I am not familiar with the completion stuff.