X-Git-Url: http://git.shiar.nl/sheet.git/blobdiff_plain/8e926bf429bf6add331c40a6620da69d37b7c585..dbcdb5b8c11c68f0ee281488009a00a822ca5680:/perl.plp

diff --git a/perl.plp b/perl.plp
index 7742f80..c227a9c 100644
--- a/perl.plp
+++ b/perl.plp
@@ -2,7 +2,7 @@
 
 Html({
 	title => 'perl version cheat sheet',
-	version => 'v1.0',
+	version => '1.4',
 	keywords => [qw'
 		perl version feature features comparison
 		sheet cheat overview summary
@@ -12,15 +12,84 @@ Html({
 });
 
 :>
-<h1>Perl cheat sheets</h1>
+<h1>Perl release summary</h1>
 
+<p>The most significant features introduced for recent versions of the Perl
+scripting language.
 <:
-my $info = do 'perl.inc.pl' or die $@ // $!;
-for my $ver (reverse sort keys %{$info}) {
-	print '<div class="section">'."\n";
-	printf '<h2>%vd</h2><dl>'."\n", $ver;
-	printf '<dt>%s<dd>%s', Entity(@{$_}), '<br/>' for @{ $info->{$ver} };
-	print "</dl>\n";
-	print "</div>\n\n";
+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;
+
+	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 $get{v};
+
+	say sprintf '<div class="section" id="%s">', vname($vernum);
+	say sprintf '<h2>%vd <small>%s</small></h2>', $vernum, $verrow->{release};
+	say '<dl>';
+	for (@{ $verrow->{new} }) {
+		my ($topic, $desc, $attr) = @{$_};
+		if ($attr) {
+			my $title;
+			if (defined $attr->{experimental}) {
+				$title = 'experimental';
+			}
+			if ($attr->{dropped}) {
+				next unless exists $get{v};
+				$title = sprintf 'removed in %vd', $attr->{dropped};
+			}
+			elsif ($attr->{stable}) {
+				$title .= sprintf ' until %vd', $attr->{stable};
+			}
+			if ($attr->{experimental}) {
+				$title = sprintf '<span title="experimental::%s">%s</span>',
+					$attr->{experimental}, $title;
+			}
+			if ($attr->{feature}) {
+				my $prefix = sprintf '<span title="%s">feature</span>',
+					$attr->{feature};
+				$title = join ', ', $prefix, $title // ();
+			}
+			$desc .= sprintf ' <em class="ex">(%s)</em>', $title;
+		}
+		say sprintf '<dt>%s<dd>%s', $topic, $desc || '<br/>';
+	}
+	say sprintf '<dt>Unicode</dt><dd>v%s', $_ for $verrow->{unicode} || ();
+	say '</dl>';
+	say "</div>\n";
 }