NAME

       Edos-pscheck - Check satisfiability of pkgsrc package dependencies

SYNOPSIS

       edos-pscheck [option] ... pkg-summary-file

DESCRIPTION

       edos-pscheck  reads  package descriptions from a file in the pkg_summary format of NetBSD.  We say that a
       package is identified by the pair consisting of the package name and of the package version.

       A package (called goal) is called installable with respect to a set of packages if there exists a  subset
       of the packages that
        - contains at most one version for each package name
        - contains the goal package (in any version, or a specific version)
        - all packages of the subset have their dependencies and conflicts satisfied in this subset.

       Edos-psmcheck  checks  whether  every  package in the set is installable with respect to the input set of
       packages. Specific versions can be specified by following the package name with  the  sign  '='  and  the
       version of the package (for instance, 'xemacs21=21.4.17-1'). If no package name is given as argument then
       all packages of the input set are checked for satisfiability.

       The constraint solving algorithm is complete, that is it finds a solution whenever there exists one, even
       for  multiple  disjunctive  dependencies  and  deep  package  conflicts.  This problem is computationally
       infeasible in theory (that is, NP-complete), but can in practice be solved very efficiently.

OPTIONS

       -explain
              Explain the results

       -rules Print generated rules

       -failures
              Only show failures

       -successes
              Only show successes

       -base file
              Specifiy an additional file providing packages  that  are  not  checked  but  used  for  resolving
              dependencies

       -quiet Supress warnings and progress/timing messages

       -xml   Output results in XML format

       -help, --help
              Display this list of options

EXAMPLE

       Check which packages in a particular distribution are not installable and why:

         edos-pscheck -failures -explain pkg_summary

       where pkg_summary is the file pertaining to that distribution.

AUTHOR

       Edos-pscheck  has  been  written  by Jerome Vouillon and Jaap Boender for the EDOS and Mancoosi projects.
       This man-page has been compiled by Ralf Treinen.

SEE ALSO

       <http://www.edos-project.org> is the home page of the EDOS project.

       edos-debcheck(1) and edos-rpmcheck(1) are the analogous tool for debian and rpm packages.

EDOS                                               2009-05-25                                   EDOS-RPMCHECK(1)