Re: [PATCH] Avoid errors from git-rev-parse in gitweb blame

> Another breakage is even though $full_rev^ _may_ exist
> (iow, $full_rev
> might not be the root commit), the file being blamed may
> not exist there
> (iow $full_rev might have introduced the file).  Instead of
> running
> "rev-parse $full_rev^", you would at least need
> to ask "rev-list -1
> $full_rev^ -- $path" or something from the Porcelain
> layer, but
> unfortunately this is rather expensive.

> Because blame already almost knows if the commit the final
> blame lies on
> has a parent, it would be reasonably cheap to add that
> "parent or nothing"
> information to its --porcelain (and its --incremental)
> format if we wanted
> to.