Bug#946724: dh-elpa: fails on native package versions with '+'

[David Bremner <david@tethera.net>]

Roland Rosenfeld <roland@spinnaker.de> writes:

> Package: dh-elpa
> Version: 2.0.2
> Severity: normal
>
> Dear Maintainer,
>
> trying to build lbdb with version 0.49+foo fails when calling
> dh_elpa with the following message:
>
>    dh_elpa
> Invalid version syntax: `0.49+foo'
> dh_elpa: emacs -batch -Q -l package --eval (add-to-list 'package-directory-list "/usr/share/emacs/site-lisp/elpa") --eval (add-to-list 'package-directory-list "/usr/share/emacs/site-lisp/elpa-src") -f package-initialize -l dh-elpa.el -f dhelpa-batch-install-directory debian/elpa-lbdb//usr/share/emacs/site-lisp/elpa-src /build/lbdb-0.49+foo/debian/.debhelper/elpa/lbdb /build/lbdb-0.49+foo/debian/.debhelper/elpa 1552316645 returned exit code 255
> make: *** [debian/rules:15: binary] Error 255
>

Emacs has stricter requirements for versions than debian policy. You can
specify the "elpa version" seperately if needed. There is some
discussion under HINTS in dh_elpa(1).

Is +foo really specified by upstream, or is it standing in for something
else?  See the docstring for the emacs function version-to-list for
acceptable formats. In particulur 20191215git3 should work for the third
git snapshot of today.

d