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)
Generated by dwww version 1.15 on Sun Jun 16 20:23:19 CEST 2024.