X-Git-Url: http://git.shiar.nl/sheet.git/blobdiff_plain/a317b63cd771060b1adb44b311360d54af8eb25a..43d481448a3819d58326be4587eadbedcf486e46:/perl.plp

diff --git a/perl.plp b/perl.plp
index b5e5d57..02d0348 100644
--- a/perl.plp
+++ b/perl.plp
@@ -19,33 +19,57 @@ scripting language.
 <:
 my $info = Data('perl');
 
+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;
-	use feature 'signatures';
-	sub linkversion ($v) {
-		return sprintf('%vd', $v);
-	}
 
 	my $now = Time::Piece->new;
+	if (my $ts = $get{at}) {
+		$now = $now->strptime($ts, '%Y-%m-%d');
+		say "Compatibility details emulated for <em>$ts</em>.";
+	}
+	my $ts = $now->strftime('%F');
+	my @versions = sort grep { $info->{$_}{release} le $ts } keys %{$info};
+
+	# perlpolicy: «We "officially" support the two most recent stable release
+	# series. [...] we will attempt to fix critical issues»
+	$info->{ $versions[-2] }{versum} //= "active core support";
+	$info->{ $versions[-1] }{versum} //= "latest stable release";
+
+	# perlpolicy: «we will attempt to fix critical issues in the two most
+	# recent stable 5.x release series»
 	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 $vcore = first { $info->{$_}{release} ge $coreeol } @versions;
+	print "<p>Core security support is provided for 3 years";
+	print ", so typical users should run at least ", linkversion($_)
+		for $vcore // ();
+	say '.';
+	$info->{$vcore}{versum} //= "official security patches";
 
+	# «We encourage vendors to ship the most recent supported release of Perl
+	# at the time of their code freeze» with debian&ubuntu having 5 years LTS
 	my $vendoreol = ($now - ONE_YEAR * 5)->strftime('%F');
 	my $vdebian = first {
 		$info->{$_}{release} ge $vendoreol && $info->{$_}{distro}{debian}
-	} sort keys %{$info};
+	} @versions;
 	say sprintf "Stable distributions such as Debian %s maintain %s+.",
-		$info->{$_}{distro}{debian}, linkversion($_) for $vdebian;
+		$info->{$_}{distro}{debian}, linkversion($_) for $vdebian // ();
+	$info->{$vdebian}{versum} //= "still maintained by common vendors";
 
+	# extended support given at random
 	my $nowcmp = $now->strftime('%F');
-	my $vdino = first { $info->{$_}{support} ge $nowcmp } sort keys %{$info};
+	my $vdino = first { $info->{$_}{support} ge $nowcmp } @versions;
 	say "Enterprise platforms retain versions up to $_."
-		for linkversion($vdino);
+		for map { linkversion($_) } $vdino // ();
 	return 1;
 } or Alert('Missing version recommendations', $@);
 say '</p>';
@@ -54,8 +78,10 @@ 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 '<h2>%vd <small>%s</small></h2>', $vernum, $verrow->{release};
+	say sprintf '<div class="section" id="%s">', vname($vernum);
+	my $title = $verrow->{release} // '?';
+	$title .= ": $_" for $verrow->{versum} // ();
+	say sprintf '<h2>%vd <small>%s</small></h2>', $vernum, $title;
 	say '<dl>';
 	for (@{ $verrow->{new} }) {
 		my ($topic, $desc, $attr) = @{$_};
@@ -74,15 +100,18 @@ for my $vernum (reverse sort keys %{$info}) {
 			if ($attr->{experimental}) {
 				$title = sprintf '<span title="experimental::%s">%s</span>',
 					$attr->{experimental}, $title;
+				$attr->{name} //= $attr->{experimental};
 			}
 			if ($attr->{feature}) {
 				my $prefix = sprintf '<span title="%s">feature</span>',
 					$attr->{feature};
 				$title = join ', ', $prefix, $title // ();
+				$attr->{name} //= $attr->{feature};
 			}
-			$desc .= sprintf ' <em class="ex">(%s)</em>', $title;
+			$desc .= sprintf ' <em class="ex">(%s)</em>', $title if $title;
 		}
-		say sprintf '<dt>%s<dd>%s', $topic, $desc || '<br/>';
+		my $ref = defined $attr->{name} && sprintf ' id="%s"', $attr->{name};
+		say sprintf '<dt%s>%s<dd>%s', $ref, $topic, $desc || '<br/>';
 	}
 	say sprintf '<dt>Unicode</dt><dd>v%s', $_ for $verrow->{unicode} || ();
 	say '</dl>';