On Wed, Feb 8, 2012 at 5:31 AM, Andreas Tille <[email protected]> wrote: > On Tue, Feb 07, 2012 at 06:27:09PM -0500, Carlos Borroto wrote: >> >> Oh, I didn't realize adding something to Recommends implies it will >> get installed by default just as a dependency. > > Aptitude and apt-get (as well as the GUI tools depending on them) are > installing Depends and Recommends. You can force ignoring Recommends > via > > apt-get --no-install-recommends > > or use APT::Install-Recommends in apt.conf. However, we can safely > assume that recommends will be installed by our target user. Those > users who are ignoring Recommends usually know what they are doing. > > As a consequence of this logic all packages your are listing as > Depends and Recommends need to be in Debian main - otherwise it needs > to go to contrib. > >> How can I get a >> "Suggested packages: cufflinks" when apt-getting tophat? Is Enhances >> mean for this? > > If you want to suggest a package simply list it as > > Suggests: cufflinks > > You can suggest packages from contrib or non-free or even from > "somewhere else" - policy does not enforce suggested packages inside > Debian main. However, a user who tries to install using > > apt-get --install-suggests > > and does not include non-free in its sources.list will fail installing > this suggested package. > >> I don't think tophat needs to be a Depends in cufflinks, as you could >> be interested in the analysis of BAM files you didn't create or BAM >> files not created with tophat. In order to run cufflinks you don't >> need tophat at all. It could be a "suggestion"(Enhances?) thou, as >> cufflinks authors do recommend mapping with tophat. > > The field "Enhances" is kind of a "Reverse-Suggests". I usually do > something like: > > Package: xy > Suggests: xy-doc > > Package: xy-doc > Enhances: xy > > So in your case it might be useful to do: > > Package: cufflinks > Enhances: tophat > > which means exactly what you wrote: tophat is not needed for running > cufflinks but on a system running tophat it makes sense to install > cufflinks. > > The Enhances field is not (yet) widely used but it makes perfectly sense > to specify it because it can give better hints for aptitude/apt-get > dependency solvers and other tools like axi-cache (xapian index). > > Kind regards > > Andreas. >
Great detailed explanation. Thanks a lot for taking the time to write it. I fixed tophat by switching cufflinks to Suggests, and enhanced cufflinks by adding tophat to Enhances. Thanks, Carlos -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/CABgGhBL9v3J40en7Eu2h6dBSFFJs=waK-T+GP=owzpfkccx...@mail.gmail.com
