[Aptitude-devel] Bug#991268: Bug#991268: aptitude should provide an option to install packages from lower priority repos (backports, experimental) if the runtime dependency specify a version that can be satisfied only with these repos

[Pirate Praveen]

On Mon, 19 Jul 2021 12:14:40 +0200 Julian Andres Klode <jak at debian.org> 
wrote:
 > I'm a bit confused because this bug is about aptitude, and there, 
this
 > should work already. It might take a couple times of rejecting solver
 > choices, though. Did you want to report the bug against apt? I think
 > we already have a report for that, though.

Can we force that by a command line option? Else if I have to add this 
in documentation for example for diaspora, I have to say, use aptitude 
and choose n two times etc.

But this did not work for diaspora anyway.

The following packages have unmet dependencies:
 libcurl4 : Depends: libnghttp2-14 (>= 1.12.0) but it is not going to 
be installed
            Depends: librtmp1 (>= 2.4+20131018.git79459a2-3~) but it is 
not going to be installed
            Depends: libssh2-1 (>= 1.7.0) but it is not going to be 
installed
 libjs-bootstrap : Depends: fonts-glyphicons-halflings but it is not 
going to be installed
 libjs-jsxc : Depends: libjs-jquery-fullscreen but it is not going to 
be installed
              Depends: libjs-prettify but it is not going to be 
installed
 diaspora : Depends: diaspora-common (>= 0.7.15.0+debian2) but it is 
not going to be installed
            Depends: unicorn (>= 6.0~) but it is not going to be 
installed
            Depends: ruby-unicorn-worker-killer (>= 0.4.5~) but it is 
not going to be installed
            Depends: ruby-devise-two-factor (>= 4.0~) but it is not 
going to be installed
            Depends: ruby-sidekiq (>= 6.2.1~) but 6.0.4+dfsg-2 is to be 
installed
            Depends: ruby-configurate (>= 0.5~) but it is not going to 
be installed
            Depends: ruby-toml-rb (>= 2.0.1~) but it is not going to be 
installed
            Depends: ruby-autoprefixer-rails (>= 10.2.4~) but 
10.1.0.0+dfsg1+~cs14.1.12-5 is to be installed
            Depends: ruby-nokogiri (>= 1.11.3~) but 1.11.1+dfsg-2 is to 
be installed
            Depends: ruby-open-graph-reader (>= 0.7.1~) but it is not 
going to be installed
            Depends: ruby-hamlit (>= 2.14.6~) but it is not going to be 
installed
 imagemagick : Depends: imagemagick-6.q16 (>= 8:6.9.2.10+dfsg-2~) but 
it is not going to be installed
 graphviz : Depends: libann0 but it is not going to be installed
            Depends: libcdt5 but it is not going to be installed
            Depends: libcgraph6 but it is not going to be installed
            Depends: libglib2.0-0 (>= 2.16.0) but it is not going to be 
installed
            Depends: libgts-0.7-5 (>= 0.7.6) but it is not going to be 
installed
            Depends: libgvc6 (>= 2.42.1) but it is not going to be 
installed
            Depends: libgvpr2 but it is not going to be installed
            Depends: liblab-gamut1 but it is not going to be installed
            Depends: libxaw7 but it is not going to be installed
 libsass-dev : Depends: libsass1 (= 3.6.4+20201122-1) but it is not 
going to be installed
 fonts-roboto-hinted : Depends: fonts-roboto-unhinted (>= 0~20170802~) 
but it is not going to be installed
 nodejs : Depends: libnode72 (= 12.21.0~dfsg-5) but it is not going to 
be installed
 libgmp-dev : Depends: libgmpxx4ldbl (= 2:6.2.1+dfsg-1) but it is not 
going to be installed
 ruby-test-unit : Depends: ruby-power-assert but it is not going to be 
installed
open: 4948; closed: 50871; defer: 12; conflict: 35 oNo solution found 
within the allotted time. Try harder? [Y/n]

After adding 
https://salsa.debian.org/rojin/diaspora-apt-pin-preferences/-/blob/master/99diaspora 
in /etc/apt/preferences.d aptitude and apt can install diaspora.

I started with aptitude because it can already do this for build 
dependencies, but having this in apt would be nice as well.

If you'd like to reproduce this issue, you can use my personal repo at 
https://wiki.debian.org/Diaspora#Bullseye_Backports.2Fpersonal_repo 
which has a package priority of 100 like official backports.