Appears to be caused by the commit "Fix repository discovery with ceiling_dirs at current directory" https://github.com/libgit2/libgit2/commit/a200dc9e1d35d44aabda468966933f34dc... (I've bisected and then created a reversion patch)
May well be a libgit2 issue but I can only test with git-changebar.
git_repository_open_ext need path to .git file (file with "gitdir: <path>") or directory path (and not path to random file).
You can try https://gist.github.com/intact/f7374bb0c6743a9a378659594f09afc9 :)
That fixes it for me. Thanks!
Okay, patch looks sensible, and indeed it seems like I've been lucky it used to work. @intact would you like to make a proper git-formatted patch with your name and all, or a PR?
Closed #493 via 4d3cded7b4168343c97f00d61c6203350c252bf3.
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