Debian::Dependencies - a list of Debian::Dependency objects

       Damyan Ivanov <dmn@debian.org>

       Copyright (C) 2008, 2009, 2010 Damyan Ivanov <dmn@debian.org>
       Copyright (C) 2009 gregor herrmann <gregoa@debian.org>

       This program is free software; you can redistribute it and/or modify  it  under  the  terms  of  the  GNU
       General Public License version 2 as published by the Free Software Foundation.

       This  program  is  distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General  Public
       License for more details.

       You  should have received a copy of the GNU General Public License along with this program; if not, write
       to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

perl v5.40.1                                       2025-02-28                          Debian::Dependencies(3pm)

       Debian::Dependencies a list of Debian::Dependency objects, with automatic construction and
       stringification.

       Objects of this class are blessed array references. You can safely treat them as arrayrefs, as long as
       the elements you put in them are instances of the Debian::Dependency class.

       When used in string context, Debian::Dependencies converts itself into a comma-delimited list of
       dependencies, suitable for dependency fields of debian/control files.

   CLASSMETHODS
       new(dependency-string)
           Constructs a new Debian::Dependencies object. Accepts one scalar argument, which is parsed and turned
           into  an  arrayref of Debian::Dependency objects.  Each dependency should be delimited by a comma and
           optional space. The exact regular expression is "/\s*,\s*/".

   OBJECTMETHODS
       add( dependency[, ... ] )
           Adds dependency (or a list of) to the list of dependencies. If the new dependency is a subset  of  or
           overlaps some of the old dependencies, it is not duplicated.

               my $d = Debian::Dependencies('foo, bar (<=4)');
               $d->add('foo (>= 4), bar');
               print "$d";     # foo (>= 4), bar (>= 4)

           dependency  can  be either a Debian::Dependency object, a Debian::Deendencies object, or a string (in
           which case it is converted to an instance of the Debian::Dependencies class).

       remove( dependency, ... )
       remove( dependencies, ... )
           Removes  a  dependency  from  the  list  of  dependencies.  Instances   of   Debian::Dependency   and
           Debian::Dependencies classes are supported as arguments.

           Any non-reference arguments are coerced to instances of Debian::Dependencies class.

           Only dependencies that are subset of the given dependencies are removed:

               my $deps = Debian::Dependencies->new('foo (>= 1.2), bar');
               $deps->remove('foo, bar (>= 2.0)');
               print $deps;    # bar

           Returns the list of the dependencies removed.

       has( dep )
           Return  true  if  the dependency list contains given dependency. In other words, this returns true if
           the list of dependencies guarantees that the given dependency will be satisfied. For  example,  "foo,
           bar" satisfies "foo", but not "foo (>= 5)".

       prune()
           This  method is deprecated. If you want to sort the dependency list, either call "sort" or use normal
           perl sorting stuff on the dereferenced array.

       sort()
           Sorts the dependency list by package name, version and relation.

       Debian::Dependencies - a list of Debian::Dependency objects

       Debian::Dependency

           my $dl = Debian::Dependencies->new('perl, libfoo-perl (>= 3.4)');
           print $dl->[1]->ver;      # 3.4
           print $dl->[1];           # libfoo-perl (>= 3.4)
           print $dl;                # perl, libfoo-perl (>= 3.4)

           $dl += 'libbar-perl';
           print $dl;                # perl, libfoo-perl (>= 3.4), libbar-perl

           print Debian::Dependencies->new('perl') + 'libfoo-bar-perl';
                                     # simple 'sum'

           print Debian::Dependencies->new('perl')
                 + Debian::Dependencies->new('libfoo, libbar');
                                     # add (concatenate) two lists

           print Debian::Dependencies->new('perl')
                 + Debian::Dependency->new('foo');
                                     # add dependency to a list