Re: vc-annotate error

[Kevin Rodgers]

JD Smith wrote:
> vc-annotate is giving me a similar error as was reported earlier for
> vc.el revision 1.408:
>
>  (file-error "Cannot open load file" "vc-nil")
>
> This occurs because I have specified a default annotate mode of
> 'fullscale, and the `vc-annotate-display-autoscale' function still
> relies on the variable `vc-annotate-backend' to call the appropriate
> backend time functions I wrote years ago.  This was formerly a global
> variable, but Stefan's changes to `vc-annotate' circa 1.408 made it buffer
> local:
>
>     (with-current-buffer temp-buffer-name
>       (set (make-local-variable 'vc-annotate-backend) (vc-backend file))
>       (set (make-local-variable 'vc-annotate-parent-file) file)
>       (set (make-local-variable 'vc-annotate-parent-rev) rev)
>       (set (make-local-variable 'vc-annotate-parent-display-mode)
>            display-mode))

That snippet immediately follows this:

    (with-output-to-temp-buffer temp-buffer-name
      (vc-call annotate-command file (get-buffer temp-buffer-name) rev))

So could the problem be that those variables are set _after_ the
annotate buffer contents have been inserted and displayed (via
temp-buffer-show-function -> vc-annotate-display-select)?  Shouldn't
they be set before?

> For whatever reason, these are not currently being set in the annotate
> output buffer, which breaks the auto-scaling annotation display, since
> it doesn't know the backend to use.  I haven't figured out how the
> buffer-local variables are being lost.  Other annotate display modes
> don't have backend-specific functions, so they continue to work.

Are you sure they're not being set at all, vs. being set too late?

--
Kevin Rodgers