From ff0ef6d21247387eb4a3a431047338f2ee44547f Mon Sep 17 00:00:00 2001
From: Sam Whited <sam@samwhited.com>
Date: Thu, 1 Dec 2016 14:19:03 -0600
Subject: [PATCH] Check for external resources in CI

Fixes #212
---
 Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Makefile b/Makefile
index ecdee8e5..912ea129 100644
--- a/Makefile
+++ b/Makefile
@@ -42,6 +42,9 @@ $(OUTDIR)/%.html: %.xml $(XMLDEPS) dependencies
 	# TODO: After existing issues are worked out this and the ratcheting CI build
 	#       should be removed and become an error, not just a warning.
 	xmllint --nonet --noout --noent --loaddtd --valid "$<" || true
+	# Check for non-data URIs
+	! xmllint --nonet --noout --noent --loaddtd --xpath "//img/@src[not(starts-with(., 'data:'))]" $< 2>/dev/null && true
+	# Actually build the HTML
 	xsltproc --path $(CURDIR) xep.xsl "$<" > "$@" && echo "Finished building $@"
 
 $(OUTDIR)/%.js: %.js