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.IX Title "AptPkg::Version 3pm"
.TH AptPkg::Version 3pm 2024-01-10 "perl v5.38.2" "User Contributed Perl Documentation"
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.SH NAME
AptPkg::Version \- APT package versioning class
.SH SYNOPSIS
.IX Header "SYNOPSIS"
use AptPkg::Version;
.SH DESCRIPTION
.IX Header "DESCRIPTION"
The AptPkg::Version module provides an interface to \fBAPT\fR's package
version handling.
.SS AptPkg::Version
.IX Subsection "AptPkg::Version"
The AptPkg::Version package implements the \fBAPT\fR pkgVersioningSystem
class.
.PP
An instance of the AptPkg::Version class may be fetched using the
\&\f(CW\*(C`versioning\*(C'\fR method from an AptPkg::System object.
.PP
The following methods are implemented:
.IP label 4
.IX Item "label"
Return the description of the versioning system, for example:
.Sp
.Vb 1
\&    Standard .deb
.Ve
.Sp
for Debian systems.
.IP "compare(\fIA\fR, \fIB\fR)" 4
.IX Item "compare(A, B)"
Compare package version \fIA\fR with \fIB\fR, returning a negative value if
\&\fIA\fR is an earlier version than \fIB\fR, zero if the same or a positive
value if \fIA\fR is later.
.IP "rel_compare(\fIA\fR, \fIB\fR)" 4
.IX Item "rel_compare(A, B)"
Compare distribution release numbers.
.IP "check_dep(\fIPKG\fR, \fIOP\fR, \fIDEP\fR)" 4
.IX Item "check_dep(PKG, OP, DEP)"
Check that the package version \fIPKG\fR satisfies the relation \fIOP\fR to
the dependency version \fIDEP\fR.
.Sp
The relation \fIOP\fR is specified in the Debian syntax regardless of the
versioning system:
.Sp
.Vb 5
\&    <<  strictly earlier
\&    <=  earlier or equal
\&    =   exactly equal
\&    >=  later or equal
\&    >>  strictly later
.Ve
.IP upstream(\fIVER\fR) 4
.IX Item "upstream(VER)"
Return the upstream component of the given version string.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBAptPkg::Config\fR\|(3pm), \fBAptPkg::System\fR\|(3pm), \fBAptPkg\fR\|(3pm).
.SH AUTHOR
.IX Header "AUTHOR"
Brendan O'Dea <bod@debian.org>