From e97b02573ade6838a726724e007f93f6bdcd86e6 Mon Sep 17 00:00:00 2001
From: Florian Schmaus <flo@geekplace.eu>
Date: Mon, 11 Dec 2023 19:25:19 +0100
Subject: [PATCH] Extract the copyrigh years of a XEP from its revision

In https://github.com/xsf/xeps/pull/1300#issuecomment-1850475278 it
was said that we do not longer simply bump the copyright year
range. But keeping the copyright year at 2021 of all XEPs, including
newer ones from 2023, is also far from ideal.

So let's simply extract the copyright year from the revision
information we already have.
---
 xep.xsl | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/xep.xsl b/xep.xsl
index e539e190..d130e599 100644
--- a/xep.xsl
+++ b/xep.xsl
@@ -257,7 +257,10 @@ content: "XEP-<xsl:value-of select='/xep/header/number'/>";
             </ul></dd>
           </xsl:if>
           <dt>Copyright</dt>
-          <dd>&#169; 1999 &#x2013; 2021 XMPP Standards Foundation. <a href='#appendix-legal'>SEE LEGAL NOTICES</a>.</dd>
+          <!-- Extract the copyright years from the dates via
+               substring(). If we ever use XSL 2.0, then we could use
+               year-from-date(xs:date()) -->
+          <dd>&#169; <xsl:value-of select='substring(/xep/header/revision[position()=last()]/date,1,4)'/> &#x2013; <xsl:value-of select='substring(/xep/header/revision[position()=1]/date,1,4)'/> XMPP Standards Foundation. <a href='#appendix-legal'>SEE LEGAL NOTICES</a>.</dd>
           <dt>Status</dt>
           <dd>
             <p><xsl:choose>