Ubuntu Manpage: apt-cudf - CUDF solver integration for APT

Provided by: apt-cudf_7.0.0-1build1_amd64

NAME

       apt-cudf - CUDF solver integration for APT

SYNOPSIS

       solvername

DESCRIPTION

       apt-cudf translates back and forth among a CUDF-based dependency solver and the protocol
       used by APT to talk with external dependency solvers. apt-cudf therefore allows one to use
       any CUDF solver as an external solver for APT.

       apt-cudf relies on its "argv[0]" name to find the CUDF solver to invoke.  In common
       setups, you should have a CUDF solver specification file under /usr/share/cudf/solvers/
       for each installed CUDF solver. To use one such solver with APT, you should create a
       symbolic link pointing to /usr/bin/apt-cudf under /usr/lib/apt/solvers/ and call it with
       the name of the CUDF solver you want to use.

OPTIONS

-v
--verbose
Print debugging information during operation. Can be repeated.

-h
--help
Show usage information and exit.

--version
Show program's version and exit.

--dump
Dump the cudf universe and solution

--noop
Dump the cudf universe and solution and exit. This is useful to generate a cudf
universe from a edsp file

--conf
Use a configuration file. Default in /etc/apt-cudf.conf

-s <solver>
--solver <solver>
Specify the external solver to use.

-c <criteria>
--criteria <criteria>
Specify the optimization criteria in extended MISC 2012 syntax. This value will be
converted into the optimization criteria language understood by the respective solver.

As an extension to the MISC 2012 syntax, a variation of the count() measurement is
supported by apt-cudf. The extension allows one to minimize or maximize the number of
packages in a set that have an EDSP field matching a regular expression. Two formats
exist. The first searches for a plain string within the EDSP field value:

count(selector,field:=/plain/)

While the second one understands the regular expression syntax of the OCaml Re_pcre
module:

count(selector,field:~/regex/)

The regex or plain string are delimitered by any character (the slash was chosen in
both above examples) but that character must not be part of the regex or plain string
itself (there is no escaping mechanism).

This option cannot be used together with the --criteria-plain option.

--criteria-plain <criteria>
This optimization criteria is passed directly to the solver without any prior parsing.

This option cannot be used together with the --criteria option.

-e
--explain
Print a human-readable summary of the solution.

--native-arch
Specify the native architecture to be used in the edsp -> cudf translation. By default
apt-cudf uses apt-config to deduce the native architecture. This option is useful if
the edsp was generated on a machine with a different architecture.

--foreign-archs
A comma-separated list of foreign architectures to be used in the edsp -> cudf
translation

EXAMPLES

       Find a solution for installing the package ghc which minimizes the packages from
       experimental:

               APT_EDSP_DUMP_FILENAME=/tmp/dump.edsp apt-get --simulate install --solver dump -o APT::Solver::Strict-Pinning=false ghc
               apt-cudf -v --solver=aspcud -c "-count(solution,APT-Release:=/a=experimental/),-removed,-changed,-new" /tmp/dump.edsp

       Usually apt-cudf is not called directly by the user but indirectly by apt-get.  So the
       above would become:

               apt-get --simulate install --solver aspcud -o APT::Solver::Strict-Pinning=false -o APT::Solver::aspcud::Preferences="-count(solution,APT-Release:=/a=experimental/),-removed,-changed,-new" ghc/experimental

AUTHOR