Re: go-ttf dependency on ttmkfdir2

[David Holland <dholland-pkgtech%netbsd.org@localhost>]

On Thu, Jan 01, 2026 at 08:05:39PM +0300, Valery Ushakov wrote:
 > > However, triggering that package to update itself when you install a
 > > font would require a mechanism we don't have. (Although probably we
 > > should grow it, because it's the right way to deal with mktexlsr and
 > > other similar issues. So maybe sometime...)
 > 
 > I think that's what apk-tools do with triggers.

Yeah, and we should have something like that...

 > >  > Why fonts need to be reinstalled if freetype2 is updated?
 > > 
 > > This is because our depends system isn't flexible/detailed enough.
 > > It's basically the same as library updates that do vs. don't have
 > > major version bumps, except here the issue is something like "the
 > > ttmkfdir2 output format changed".
 > 
 > That seems ... contrived.

Not really; it's a case where A depends on B, most of the time there's
no need to rebuild/redo A when B changes, but occasionally there is.
We handle these by being super-conservative about rebuilding, but it's
mostly unnecessary, annoying, stupid, and expensive :-|

 > Also, does anyone actually use it, because it's obviously broken?
 > 
 > $ awk '$NF == "-"' /usr/pkg/share/fonts/X11/TTF/fonts.scale | sort -u
 > Go-Bold.ttf -
 > Go-Italic.ttf -
 > Go-Medium.ttf -
 > Go-Mono.ttf -
 > $ awk '$NF == "-"' /usr/pkg/share/fonts/X11/TTF/fonts.scale | wc -l
 >      108

I do not have that, but looking at the files reveals other obvious
brokenness. E.g. in fonts.dir I see

  DejaVuSans-BoldOblique.ttf -p^C
  DejaVuSans-BoldOblique.ttf -p^C
  DejaVuSans-BoldOblique.ttf -p^C
     :

and fonts.scale also has many lines of the form
  DejaVuSansCondensed-Bold.ttf -P^C<F4><FF>-DejaVu Sans Condensed-bold-r-semi condensed--0-0-0-0-c-0-adobe-standard

(escaping by less)

I smell UB.

-- 
David A. Holland
dholland%netbsd.org@localhost