GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  DPKG::VERSION (3)

.ds Aq ’

NAME

Dpkg::Version - handling and comparing dpkg-style version numbers

CONTENTS

DESCRIPTION

The Dpkg::Version module provides pure-Perl routines to compare dpkg-style version numbers (as used in Debian packages) and also an object oriented interface overriding perl operators to do the right thing when you compare Dpkg::Version object between them.

METHODS

$v = Dpkg::Version->new($version, %opts) Create a new Dpkg::Version object corresponding to the version indicated in the string (scalar) $version. By default it will accepts any string and consider it as a valid version. If you pass the option check => 1, it will return undef if the version is invalid (see version_check for details).

You can always call $v->is_valid() later on to verify that the version is valid.

boolean evaluation When the Dpkg::Version object is used in a boolean evaluation (for example in if ($v) or $v || ’default’) it returns its string representation if the version stored is valid ($v->is_valid()) and undef otherwise.
$v->is_valid() Returns true if the version is valid, false otherwise.
$v->epoch(), $v->version(), $v->revision() Returns the corresponding part of the full version string.
$v->is_native() Returns true if the version is native, false if it has a revision.
$v1 <=> $v2, $v1 < $v2, $v1 <= $v2, $v1 > $v2, $v1 >= $v2 Numerical comparison of various versions numbers. One of the two operands needs to be a Dpkg::Version, the other one can be anything provided that its string representation is a version number.
‘‘$v’’, $v->as_string(), $v->as_string(%options) Accepts an optional option hash reference, affecting the string conversion.

Options:
omit_epoch (defaults to 0) Omit the epoch, if present, in the output string.
omit_revision (defaults to 0) Omit the revision, if present, in the output string.

Returns the string representation of the version number.

FUNCTIONS

All the functions are exported by default.
version_compare($a, $b) Returns -1 if $a is earlier than $b, 0 if they are equal and 1 if $a is later than $b.

If $a or $b are not valid version numbers, it dies with an error.

version_compare_relation($a, $rel, $b) Returns the result (0 or 1) of the given comparison operation. This function is implemented on top of version_compare().

Allowed values for $rel are the exported constants REL_GT, REL_GE, REL_EQ, REL_LE, REL_LT. Use version_normalize_relation() if you have an input string containing the operator.

$rel = version_normalize_relation($rel_string) Returns the normalized constant of the relation $rel (a value among REL_GT, REL_GE, REL_EQ, REL_LE and REL_LT). Supported relations names in input are: gt, ge, eq, le, lt, >>, >=, =, <=, <<. > and < are also supported but should not be used as they are obsolete aliases of >= and <=.
version_compare_string($a, $b) String comparison function used for comparing non-numerical parts of version numbers. Returns -1 if $a is earlier than $b, 0 if they are equal and 1 if $a is later than $b.

The ~ character always sort lower than anything else. Digits sort lower than non-digits. Among remaining characters alphabetic characters (A-Za-z) sort lower than the other ones. Within each range, the ASCII decimal value of the character is used to sort between characters.

version_compare_part($a, $b) Compare two corresponding sub-parts of a version number (either upstream version or debian revision).

Each parameter is split by version_split_digits() and resulting items are compared together. As soon as a difference happens, it returns -1 if $a is earlier than $b, 0 if they are equal and 1 if $a is later than $b.

@items = version_split_digits($version) Splits a string in items that are each entirely composed either of digits or of non-digits. For instance for 1.024~beta1+svn234 it would return (1, ., 024, ~beta, 1, +svn, 234).
($ok, $msg) = version_check($version)
$ok = version_check($version) Checks the validity of $version as a version number. Returns 1 in $ok if the version is valid, 0 otherwise. In the latter case, $msg contains a description of the problem with the $version scalar.

CHANGES

    Version 1.01 (dpkg 1.17.0)

New argument: Accept an options argument in $v->as_string().

New method: $v->is_native().

    Version 1.00 (dpkg 1.15.6)

Mark the module as public.

AUTHOR

Don Armstrong <don@donarmstrong.com>, Colin Watson <cjwatson@debian.org> and RaphaŽl Hertzog <hertzog@debian.org>, based on the implementation in dpkg/lib/version.c by Ian Jackson and others.
Search for    or go to Top of page |  Section 3 |  Main Index


1.18.4 DPKG::VERSION (3) 2015-11-26

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.