NAME¶
Lintian::Relation::Version - Comparison operators on Debian versions
SYNOPSIS¶
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');
DESCRIPTION¶
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.
FUNCTIONS¶
- versions_equal(A, B)
- Returns true if A is equal to B ("=")
and false otherwise.
- versions_lte(A, B)
- Returns true if A is less than or equal
("<=") to B and false otherwise.
- versions_gte(A, B)
- Returns true if A is greater than or equal
(">=") to B and false otherwise.
- versions_lt(A, B)
- Returns true if A is less than
("<<") B and false otherwise.
- versions_gt(A, B)
- Returns true if A is greater than
(">>") B and false otherwise.
- versions_compare(A, OP, B)
- Returns true if A OP B, where OP is one of
"=",
"<=",
">=",
"<<", or
">>", and false otherwise.
- versions_comparator (A, B)
- 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) {
...
}
AUTHOR¶
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>.
