Re: vc-modify-change-comment for "modern" backend fix

[Dmitry Gutov]

On 19.05.2022 09:11, Alfred M. Szmidt wrote:
>     On 18.05.2022 09:34, Alfred M. Szmidt wrote:
>     > +  "Extract the commit message for the current file."
>     > +  (vc-call-backend log-view-vc-backend
>     > +                   'get-log-entry
>     > +                   (log-view-current-file)
>     > +                   (log-view-current-tag)))
>
>     Why not customize the extraction function only for backends that need it?
>
> This does that, no?  If you don't have get-log-entry, then things work
> as previously.

Yeah, ok. But see the other recommendations.

>     The backend command could be called 'extract-comment'. Which is somewhat
>     different from "log entry" because the latter seems to include the
>     headers, in VC parlance.
>
>
>     And you haven't explained thus far your plan for implementing
>     'modify-change-comment' for e.g. Git.
>
> I have no plans on implementing such functionality for git.

Okay, but how will this work in fossil? Similar to editing a single 
commit during a rebase?