Dpkg::Deps::Simple(3perl)        libdpkg-perl        Dpkg::Deps::Simple(3perl)

NAME
       Dpkg::Deps::Simple - represents a single dependency statement

DESCRIPTION
       This class represents a single dependency statement.  It has several
       interesting properties:

       package
           The package name (can be undef if the dependency has not been
           initialized or if the simplification of the dependency lead to its
           removal).

       relation
           The relational operator: "=", "<<", "<=", ">=" or ">>". It can be
           undefined if the dependency had no version restriction. In that
           case the following field is also undefined.

       version
           The version.

       arches
           The list of architectures where this dependency is applicable. It
           is undefined when there's no restriction, otherwise it is an array
           ref. It can contain an exclusion list, in that case each
           architecture is prefixed with an exclamation mark.

       archqual
           The arch qualifier of the dependency (can be undef if there is
           none).  In the dependency "python:any (>= 2.6)", the arch qualifier
           is "any".

       restrictions
           The restrictions formula for this dependency. It is undefined when
           there is no restriction formula. Otherwise it is an array ref.

METHODS
       $dep = Dpkg::Deps::Simple->new([$dep[, %opts]]);
           Creates a new object. Some options can be set through %opts:

           host_arch
               Sets the host architecture.

           build_arch
               Sets the build architecture.

           build_dep
               Specifies whether the parser should consider it a build
               dependency.  Defaults to 0.

           tests_dep
               Specifies whether the parser should consider it a tests
               dependency.  Defaults to 0.

       $dep->reset()
           Clears any dependency information stored in $dep so that
           $dep->is_empty() returns true.

       $dep->parse_string($dep_string)
           Parses the dependency string and modifies internal properties to
           match the parsed dependency.

       $dep->parse($fh, $desc)
           Parse a dependency line from a filehandle.

       $dep->load($filename)
           Parse a dependency line from $filename.

       $dep->output([$fh])
       "$dep"
           Returns a string representing the dependency. If $fh is set, it
           prints the string to the filehandle.

       $dep->save($filename)
           Save the dependency into the given $filename.

       $dep->implies($other_dep)
           Returns 1 when $dep implies $other_dep. Returns 0 when $dep implies
           NOT($other_dep). Returns undef when there is no implication. $dep
           and $other_dep do not need to be of the same type.

       $dep->get_deps()
           Returns a list of sub-dependencies, which for this object it means
           it returns itself.

       $dep->sort()
           This method is a no-op for this object.

       $dep->arch_is_concerned($arch)
           Returns true if the dependency applies to the indicated
           architecture.

       $dep->reduce_arch($arch)
           Simplifies the dependency to contain only information relevant to
           the given architecture. This object can be left empty after this
           operation. This trims off the architecture restriction list of
           these objects.

       $dep->has_arch_restriction()
           Returns the package name if the dependency applies only to a subset
           of architectures.

       $dep->profile_is_concerned()
           Returns true if the dependency applies to the indicated profile.

       $dep->reduce_profiles()
           Simplifies the dependency to contain only information relevant to
           the given profile. This object can be left empty after this
           operation. This trims off the profile restriction list of this
           object.

       $dep->get_evaluation($facts)
           Evaluates the dependency given a list of installed packages and a
           list of virtual packages provided. These lists are part of the
           Dpkg::Deps::KnownFacts object given as parameters.

           Returns 1 when it's true, 0 when it's false, undef when some
           information is lacking to conclude.

       $dep->simplify_deps($facts, @assumed_deps)
           Simplifies the dependency as much as possible given the list of
           facts (see class Dpkg::Deps::KnownFacts) and a list of other
           dependencies that are known to be true.

       $dep->is_empty()
           Returns true if the dependency is empty and doesn't contain any
           useful information. This is true when the object has not yet been
           initialized.

       $dep->merge_union($other_dep)
           Returns true if $dep could be modified to represent the union of
           both dependencies. Otherwise returns false.

CHANGES
   Version 1.02 (dpkg 1.17.10)
       New methods: Add $dep->profile_is_concerned() and
       $dep->reduce_profiles().

   Version 1.01 (dpkg 1.16.1)
       New method: Add $dep->reset().

       New property: recognizes the arch qualifier "any" and stores it in the
       "archqual" property when present.

   Version 1.00 (dpkg 1.15.6)
       Mark the module as public.

1.21.22                           2023-05-11         Dpkg::Deps::Simple(3perl)

Czas wygenerowania: 0.00023 sek.

Created with the man page lookup class by Andrew Collington.
Based on a C man page viewer by Vadim Pavlov
Unicode soft-hyphen fix (as used by RedHat) by Dan Edwards
Some optimisations by Eli Argon
Caching idea and code contribution by James Richardson

Copyright © 2003-2025 Linux.pl
Hosted by Hosting Linux.pl