a repository with sparse-checkout fails

[rbuckland]

Describe the bug
Underlying library libgit2 does not support repositories that use sparse-checkout
(ref: libgit2/libgit2#6044)

This is for libgit2 to resolve, however, there seems to be a "protective" approach that convco needs to do, until libgit2 resolved the issue.

(gfold had to do the same - JohnFredok/gfold@667d927)

To Reproduce
Steps to reproduce the behavior:
❯ convco version
7.0.0

❯ git sparse-checkout init --cone

❯ convco version
unsupported extension name extensions.worktreeconfig; class=Repository (6)
unsupported extension name extensions.worktreeconfig; class=Repository (6)

Expected behavior
No error, and if possible (depending on paths) still print the version
or, send error to stderr, and not fail.

Recovery from
❯ git sparse-checkout disable
and remove the added extenstion entry. Even if the value is "false" it will still error.

[extensions]
        worktreeConfig = true
".git/config" 277L, 9695B  

[hdevalke]

If there is an error opening the repo, I don't understand why the exit code should be 0.

In gfold, the workaround returns from the function, but does not have a repo instance. So if the same workaround is done, it will not be possible to calculate the version.

So I think what convco does now is the right thing

[rbuckland]

convco does the right thing yes, however, the underlying issue in libgit2 means that convco cannot be used on repositories that use worktreeconfig git extensions.