Bug#894049: transition: ncurses

[Sven Joachim <svenjoac@gmx.de>]

On 2018-03-25 21:51 +0200, Sven Joachim wrote:

> Package: release.debian.org
> Severity: normal
> User: release.debian.org@packages.debian.org
> Usertags: transition
>
> I would like to start a transition for ncurses, changing the soname of
> the libraries from 5 to 6.

The results thus far look quite good, although a few bugs still need to
ironed out, e.g. #898131.

> Suggested ben file (please check if it is correct):
>
> title = "ncurses";
> is_affected = .depends ~
> /\b(lib32ncurses6|lib32ncursesw6|lib32tinfo6|lib64ncurses6|lib64ncursesw6|lib64tinfo6|libncurses6|libncursesw6|libtinfo6|libtinfo6\-udeb|lib32ncurses5|lib32ncursesw5|lib32tinfo5|lib64ncurses5|lib64tinfo5|libncurses5|libncursesw5|libtinfo5|libtinfo5\-udeb)\b/;
> is_good = .depends ~
> /\b(lib32ncurses6|lib32ncursesw6|lib32tinfo6|lib64ncurses6|lib64ncursesw6|lib64tinfo6|libncurses6|libncursesw6|libtinfo6|libtinfo6\-udeb)\b/;
> is_bad = .depends ~
> /\b(lib32ncurses5|lib32ncursesw5|lib32tinfo5|lib64ncurses5|lib64tinfo5|libncurses5|libncursesw5|libtinfo5|libtinfo5\-udeb)\b/
> & ! .package ~ /\b(libncursesw5|libncurses5)\b/;

This has turned out to be rather suboptimal, because the regexes match
on libncurses5-dev etc, and so some packages are listed as partial or
bad in the tracker[1] which should be good or unaffected.  The ones
below seem to be better, filtering out the -dev packages while still
catching hardcoded dependencies such as #804579.

title = "libncurses6";
is_affected = .depends ~ /\b(lib32ncurses6|lib32ncursesw6|lib32tinfo6|lib64ncurses6|lib64ncursesw6|lib64tinfo6|libncurses6|libncursesw6|libtinfo6|libtinfo6\-udeb|lib32ncurses5|lib32ncursesw5|lib32tinfo5|lib64ncurses5|lib64tinfo5|libncurses5|libncursesw5|libtinfo5|libtinfo5\-udeb)([^-]|$)/;
is_good = .depends ~ /\b(lib32ncurses6|lib32ncursesw6|lib32tinfo6|lib64ncurses6|lib64ncursesw6|lib64tinfo6|libncurses6|libncursesw6|libtinfo6|libtinfo6\-udeb)\b/;
is_bad = .depends ~ /\b(lib32ncurses5|lib32ncursesw5|lib32tinfo5|lib64ncurses5|lib64tinfo5|libncurses5|libncursesw5|libtinfo5|libtinfo5\-udeb)\b/ & ! .package ~ /\b(libncursesw5|libncurses5)([^-]|$)/; 

Another small problem is that bash is missing on the tracker since it
uses Pre-Depends rather than Depends.  Should I try to fiddle more with
the ben syntax, or file a separate binNMU request for bash?  The latter
would definitely be easier for me.

Cheers,
       Sven


1. https://release.debian.org/transitions/html/libncurses6.html