From 130959973a9a8750dbaa63ab3cf04bb39d91fe7f Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sat, 27 Dec 2014 21:17:08 -0800
Subject: Makefile:  Added spec target with check of internal links/anchors.

---
 Makefile | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 6723f2e..7110998 100644
--- a/Makefile
+++ b/Makefile
@@ -175,6 +175,14 @@ dingus: js/commonmark.js
 spec.md: $(SPEC)
 	perl spec2md.pl < $< > $@
 
+spec: spec.html
+	@anchors=`perl -ne '@matches = / id="([^"]*)"/g; foreach $$match (@matches) { print "$$match\n"; }' $<`; \
+	links=`perl -ne '@matches = / href="#([^"]*)"/g; foreach $$match (@matches) { print "$$match\n"; }' $<`; \
+	for link in $$links; do \
+		[[ $$anchors =~ $$link ]] || \
+			 echo "Link to missing anchor #$$link"; \
+	done
+
 spec.html: spec.md template.html
 	pandoc --no-highlight --number-sections --template template.html -s --toc -S $< | \
 	perl -pe 's/a href="@([^"]*)"/a id="\1" href="#\1" class="definition"/g' | \
@@ -189,8 +197,8 @@ spec.pdf: spec.md template.tex specfilter.hs
 
 ### Website ###
 
-update-site: spec.html js/commonmark.js
+update-site: spec js/commonmark.js
 	make -C $(SITE) update
 
-upload-site: spec.html
+upload-site: spec js/commonmark.js
 	make -C $(SITE) upload
-- 
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