DOKK / manpages / debian 10 / lintian / Lintian::Relation::Version.3.en
Lintian::Relation::Version(3) Debian Package Checker Lintian::Relation::Version(3)

Lintian::Relation::Version - Comparison operators on Debian versions

    print "yes\n" if versions_equal('1.0', '1.00');
    print "yes\n" if versions_gte('1.1', '1.0');
    print "no\n" if versions_lte('1.1', '1.0');
    print "yes\n" if versions_gt('1.1', '1.0');
    print "no\n" if versions_lt('1.1', '1.1');
    print "yes\n" if versions_compare('1.1', '<=', '1.1');

This module provides five functions for comparing version numbers. The underlying implementation uses "libapt-pkg-perl" to ensure that the results match what dpkg will expect.

Returns true if A is equal to B ("=") and false otherwise.
Returns true if A is less than or equal ("<=") to B and false otherwise.
Returns true if A is greater than or equal (">=") to B and false otherwise.
Returns true if A is less than ("<<") B and false otherwise.
Returns true if A is greater than (">>") B and false otherwise.
Returns true if A OP B, where OP is one of "=", "<=", ">=", "<<", or ">>", and false otherwise.
Returns -1, 0 or 1 if the version A is (respectively) less than, equal to or greater than B. This is useful for (e.g.) sorting a list of versions:

 foreach my $version (sort versions_comparator @versions) {
    ...
 }
    

Originally written by Russ Allbery <rra@debian.org> for Lintian and adapted to use libapt-pkg-perl by Adam D. Barratt <adam@adam-barratt-org.uk>.

lintian(1)

2019-05-26 Lintian v2.15.0