perl: optional recommendations at ?at timestamp

[sheet.git] / perl.plp

diff --git a/perl.plp b/perl.plp
index 6f2dd93b7344b3a281684bd0a849873576e263a3..b1ea1c760501c25df2c2819ee744a9e8f4dd15fa 100644 (file)
--- a/perl.plp
+++ b/perl.plp
@@ -19,17 +19,49 @@ scripting language.
 <:
 my $info = Data('perl');
 
-say "Depending on desired compatibility you'll want to support a minimum of";
-say join(' or ', map {
-       sprintf '<span title="on %s">v%vd</span>', $info->{$_}->{distrosum}, $_
-} v5.8, v5.20), '.';
+use feature 'signatures';
+sub vname ($v) {
+       return sprintf 'v%d%03d', unpack 'C*', $v;
+}
+sub linkversion ($v) {
+       return showlink(sprintf('%vd', $v), '#'.vname($v));
+}
+
+eval {
+       use List::Util 'first';
+       use Time::Piece;
+       use Time::Seconds;
+
+       my $now = Time::Piece->new;
+       $now = $now->strptime($_, '%Y-%m-%d') for $get{at} // ();
+
+       my $coreeol = ($now - ONE_YEAR * 3)->strftime('%F');
+       my $vcore = first { $info->{$_}{release} ge $coreeol } sort keys %{$info};
+       print "<p>Core security support is provided for 3 years";
+       print ", so typical users should run at least ", linkversion($_)
+               for $vcore // ();
+       say '.';
+
+       my $vendoreol = ($now - ONE_YEAR * 5)->strftime('%F');
+       my $vdebian = first {
+               $info->{$_}{release} ge $vendoreol && $info->{$_}{distro}{debian}
+       } sort keys %{$info};
+       say sprintf "Stable distributions such as Debian %s maintain %s+.",
+               $info->{$_}{distro}{debian}, linkversion($_) for $vdebian // ();
+
+       my $nowcmp = $now->strftime('%F');
+       my $vdino = first { $info->{$_}{support} ge $nowcmp } sort keys %{$info};
+       say "Enterprise platforms retain versions up to $_."
+               for map { linkversion($_) } $vdino // ();
+       return 1;
+} or Alert('Missing version recommendations', $@);
 say '</p>';
 
 for my $vernum (reverse sort keys %{$info}) {
        my $verrow = $info->{$vernum};
        defined $verrow->{unstable} and next unless exists $get{v};
 
-       say '<div class="section">';
+       say sprintf '<div class="section" id="%s">', vname($vernum);
        say sprintf '<h2>%vd <small>%s</small></h2>', $vernum, $verrow->{release};
        say '<dl>';
        for (@{ $verrow->{new} }) {