From 0c8a433cd0ed43ea798397b8464ada4994a6d054 Mon Sep 17 00:00:00 2001
From: Petter Reinholdtsen <pere@hungry.com>
Date: Sun, 11 Feb 2018 08:20:58 +0100
Subject: [PATCH 1/1] Add new target check-urls to visit all URLs in the
 manuscript.

---
 Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Makefile b/Makefile
index 15294f9..b0a37a4 100644
--- a/Makefile
+++ b/Makefile
@@ -118,6 +118,11 @@ lint-es: $(SOURCE).nb.xml
 lint-nb: $(SOURCE).nb.xml
 	xmllint $(XMLLINTOPTS) $^
 
+check-urls:
+	retval=0; for u in $$(perl -n -e'/<ulink url="(.+)"\/>/ && print "$$1\n"' MadewithCreativeCommonsmostup-to-dateversion.xml | sort -u); do \
+	  HEAD -H "User-Agent: Docbook XML URL checker" "$$u" > /dev/null || echo "error fetching $$u"; retval=1; \
+	done; exit $$retval
+
 # Experimental build rule to test Docbook XSL + FOP processor 
 xsl-fo-%.pdf: %.xml
 	xsltproc --output $(subst .pdf,.fo,$@) \
-- 
2.47.2