From a317b63cd771060b1adb44b311360d54af8eb25a Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Mon, 13 Feb 2023 15:38:23 +0100
Subject: [PATCH] perl: find vendor versions by support times

---
 perl.plp | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/perl.plp b/perl.plp
index 9a8baf1..b5e5d57 100644
--- a/perl.plp
+++ b/perl.plp
@@ -19,10 +19,35 @@ 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}, $_
-} v5.10, v5.20, v5.28), '.';
+eval {
+	use List::Util 'first';
+	use Time::Piece;
+	use Time::Seconds;
+	use feature 'signatures';
+	sub linkversion ($v) {
+		return sprintf('%vd', $v);
+	}
+
+	my $now = Time::Piece->new;
+	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}) {
-- 
2.30.0