From 128763bb74627a021a4828085317bb6de9929f17 Mon Sep 17 00:00:00 2001
From: Stefan Sauer <ensonic@users.sf.net>
Date: Sun, 16 Jun 2013 14:45:08 +0200
Subject: [PATCH] docs: check for broken links in docs

The check is done using curl (if available). It lists the curl exit code + http
status code (for those > 399) together with the use of the url in the code. The
check is not fatal.
---
 docs/manuals.mak | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/docs/manuals.mak b/docs/manuals.mak
index 353650ce16..c0fec85dad 100644
--- a/docs/manuals.mak
+++ b/docs/manuals.mak
@@ -166,7 +166,20 @@ $(BUILDIMAGESDIR)/%.ps: %.png
 # make sure xml validates properly
 check-local: $(BUILDDIR)/$(MAIN)
 	@cp -f $(srcdir)/../image-png $(BUILDDIR)/image.entities
-	cd $(BUILDDIR) && xmllint -noout -valid $(MAIN)
+	@cd $(BUILDDIR) && xmllint -noout -valid $(MAIN)
+	@cd $(BUILDDIR) && \
+	if [ `which curl` ]; then \
+    links=`$(XSLTPROC) $(XSLTPROC_FLAGS) --xinclude $(abs_top_srcdir)/docs/list-ulink.xsl $(MAIN) | egrep '^http' | sort | uniq` && \
+    have_error=0 && \
+    for link in $$links; do \
+      code=`curl -s -m20 -o /dev/null -I -w "%{http_code}" $$link`; \
+      if [ \( $$? -ne 0 \) -o \( $$code -gt 399 \) ]; then \
+        echo "exit_status=$$?, http_code=$$code: $$link"; \
+        grep -Hnr "$$link" .; \
+        have_error=1; \
+      fi; \
+    done \
+  fi
 
 # avoid 'cp: cannot create regular file `build/image.entities': File exists'
 # errors during 'make distcheck' by disabling parallel builds