3 CPAN::Version - utility functions to compare CPAN versions
9 CPAN::Version->vgt("1.1","1.1.1"); # 1
11 CPAN::Version->vcmp("1.1","1.1.1"); # 1
13 CPAN::Version->readable(v1.2.3); # "v1.2.3"
15 CPAN::Version->vstring("v1.2.3"); # v1.2.3
17 CPAN::Version->float2vv(1.002003); # "v1.2.3"
21 This module mediates between some version that perl sees in a package
22 and the version that is published by the CPAN indexer.
24 It's only written as a helper module for both CPAN.pm and CPANPLUS.pm.
26 As it stands it predates version.pm but has the same goal: make
27 version strings visible and comparable.
31 package CPAN::Version;
33 use vars qw($VERSION);
34 $VERSION = sprintf "%.2f", substr(q$Rev: 231 $,4)/100;
36 # CPAN::Version::vcmp courtesy Jost Krieger
40 CPAN->debug("l[$l] r[$r]") if $CPAN::DEBUG;
42 return 0 if $l eq $r; # short circuit for quicker success
45 next unless tr/.// > 1;
47 1 while s/\.0+(\d)/.$1/;
49 if ($l=~/^v/ <=> $r=~/^v/) {
52 $_ = $self->float2vv($_);
57 ($l ne "undef") <=> ($r ne "undef") ||
62 $self->vstring($l) cmp $self->vstring($r)
71 $self->vcmp($l,$r) > 0;
76 $n =~ s/^v// or die "CPAN::Version::vstring() called with invalid arg [$n]";
77 pack "U*", split /\./, $n;
80 # vv => visible vstring
85 my($mantissa) = $n =~ /\.(\d{1,12})/; # limit to 12 digits to limit
86 # architecture influence
88 $mantissa .= "0" while length($mantissa)%3;
91 $mantissa =~ s/(\d{1,3})// or
92 die "Panic: length>0 but not a digit? mantissa[$mantissa]";
95 # warn "n[$n]ret[$ret]";
101 $n =~ /^([\w\-\+\.]+)/;
103 return $1 if defined $1 && length($1)>0;
104 # if the first user reaches version v43, he will be treated as "+".
105 # We'll have to decide about a new rule here then, depending on what
106 # will be the prevailing versioning behavior then.
108 if ($] < 5.006) { # or whenever v-strings were introduced
109 # we get them wrong anyway, whatever we do, because 5.005 will
110 # have already interpreted 0.2.4 to be "0.24". So even if he
111 # indexer sends us something like "v0.2.4" we compare wrongly.
113 # And if they say v1.2, then the old perl takes it as "v12"
115 if (defined $CPAN::Frontend) {
116 $CPAN::Frontend->mywarn("Suspicious version string seen [$n]\n");
118 warn("Suspicious version string seen [$n]\n");
122 my $better = sprintf "v%vd", $n;
123 CPAN->debug("n[$n] better[$better]") if $CPAN::DEBUG;
133 # cperl-indent-level: 2