apt-cudf - CUDF solver integration for APT
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" name to find the CUDF solver to
invoke. In common setups, you should have a CUDF solver specification file
for each installed CUDF solver. To use
one such solver with APT, you should create a symbolic link pointing to
and call it with
the name of the CUDF solver you want to use.
- Print debugging information during operation. Can be repeated.
- Show usage information and exit.
- Show program's version and exit.
- Dump the cudf universe and solution
- Dump the cudf universe and solution and exit. This is useful to generate a
cudf universe from a edsp file
- 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 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:
While the second one understands the regular expression syntax of the OCaml
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
- --criteria-plain <criteria>
- This optimization criteria is passed directly to the solver without any
This option cannot be used together with the --criteria option.
- Print a human-readable summary of the solution.
- Speficy 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.
- A comma-separated list of foreign architectures to be used in the edsp
-> cudf translation
Find a solution for installing the package ghc which minimizes the packages from
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
Copyright: (C) 2011 Pietro Abate <firstname.lastname@example.org> Copyright:
(C) 2011 Stefano Zacchiroli <email@example.com>
License: GNU Lesser General Public License (GPL), version 3 or above