perl: link version references in description

[sheet.git] / perl.plp

diff --git a/perl.plp b/perl.plp
index 8735f5f4f42d403fd9214342c192100013d9492e..c227a9c89898034231633b1f55acdcb8997d9ef8 100644 (file)
--- a/perl.plp
+++ b/perl.plp
@@ -2,7 +2,7 @@
 
 Html({
        title => 'perl version cheat sheet',
-       version => '1.3',
+       version => '1.4',
        keywords => [qw'
                perl version feature features comparison
                sheet cheat overview summary
@@ -17,19 +17,48 @@ Html({
 <p>The most significant features introduced for recent versions of the Perl
 scripting language.
 <:
-my $info = do 'perl.inc.pl' or die $@ // $!;
+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}, $_
-} v5.8, v5.14), '.';
+use feature 'signatures';
+sub vname ($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;
+       my $coreeol = ($now - ONE_YEAR * 3)->strftime('%F');
+       my $vcore = first { $info->{$_}{release} ge $coreeol } sort keys %{$info};
+       say "<p>Core security support is provided for 3 years",
+               ", so typical users should run at least $_."
+               for linkversion($vcore);
+
+       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 $_."
+               for linkversion($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} }) {
@@ -53,7 +82,7 @@ for my $vernum (reverse sort keys %{$info}) {
                        if ($attr->{feature}) {
                                my $prefix = sprintf '<span title="%s">feature</span>',
                                        $attr->{feature};
-                               my $title = join ', ', $prefix, $title // ();
+                               $title = join ', ', $prefix, $title // ();
                        }
                        $desc .= sprintf ' <em class="ex">(%s)</em>', $title;
                }