Remove unused var

Try to support macOS

I don't have one so hard to tell whether it works.

Update README

Update README

Prefer tracked remote first, then fallback on preferred_upstream

Don't open url / set clipboard if error

Add tree_url support for gitiles

Update README

A bit of refactoring and a bug fix

Remove duplicate check

Update README

Fix slowpath

Add tree_url support

Fix blob with github and ref

Add support for cgit repository

Add notification for clipboard and open

Add slow fallback for getting go mod info

Add tests

Fix basic gomod

Fix error if Origin.Ref not exist