On Sun, 4 Sep 2011 08:16:48 +0200 Lucas Nussbaum wrote: > On 04/09/11 at 00:54 +0200, Francesco Poli wrote: [...] > > Good, if what I discovered doesn't change the conclusion, I'll keep the > > versioned dependency. > > Please do.
OK, thanks for confirming that it is recommendable. > > If you want to facilitate backports, maybe use something like: > ruby-cmdparse2 (>= X) | libcmdparse2-ruby (>= X) I've just tried out this strategy: it works, but it has an important drawback. Let me explain. The current (sid) version of apt-listbugs is 0.1.5 : it depends on libxml-parser-ruby1.8 and on libhttpclient-ruby1.8 (>= 2.1.5.2-1) . Let's call apt-listbugs/0.1.6~rc1 the modified version which depends on ruby-xmlparser and on ruby-httpclient (>= 2.1.5.2-1) . Let's call apt-listbugs/0.1.6~rc2 the modified version which depends on ruby-xmlparser | libxml-parser-ruby1.8 and on ruby-httpclient (>= 2.1.5.2-1) | libhttpclient-ruby1.8 (>= 2.1.5.2-1) . Everything seems to work fine when installing apt-listbugs/0.1.6~rc1 or apt-listbugs/0.1.6~rc2 from scratch. But if I try to upgrade from apt-listbugs/0.1.5 to apt-listbugs/0.1.6~rc2 the transitional packages are not automatically removed (not even when no other package depends on or recommends them), since they are still satisfying a dependency. On the other hand, if I try to upgrade from apt-listbugs/0.1.5 to apt-listbugs/0.1.6~rc1, aptitude automatically removes the two transitional packages (as long as no other package depends on or recommends them), thus leaving users' systems in a cleaner state. Hence, I think it is better to convert Depends: libfoo-ruby1.8, libbar-ruby1.8 (>= X) into Depends: ruby-foo, ruby-bar (>= X) rather than using the alternative dependency trick. I hope my input may be useful. -- http://www.inventati.org/frx/frx-gpg-key-transition-2010.txt New GnuPG key, see the transition document! ..................................................... Francesco Poli . GnuPG key fpr == CA01 1147 9CD2 EFDF FB82 3925 3E1C 27E1 1F69 BFFE
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