From e04a19588e9110f0caffe480e22f553ad7134e57 Mon Sep 17 00:00:00 2001
From: vv01f <vv01f@users.noreply.github.com>
Date: Thu, 12 Sep 2019 09:15:34 +0200
Subject: [PATCH] fn website_mirror() + generalized assert_tools()

---
 gen.sh | 39 +++++++++++++++++++++++++++++++++++----
 1 file changed, 35 insertions(+), 4 deletions(-)

diff --git a/gen.sh b/gen.sh
index 4442398..32a1490 100755
--- a/gen.sh
+++ b/gen.sh
@@ -1,16 +1,47 @@
 #!/usr/bin/env sh
-which xsltproc >/dev/null
-test $? -eq 0 || {
-	echo "tool missing: xsltproc"
-	exit 1
+assert_tools () {
+	while test $# -gt 0; do
+		which $1  >/dev/null 2>/dev/null || {
+			echo "tool missing: "$1
+			exit 2
+		}
+		shift
+	done
 }
 test $# -eq 0 && {
+	dependencies="xsltproc"
+	assert_tools ${dependencies}
 	xsltproc --encoding utf-8 -o ds-feed.xml rss.xsl data.xml
 	xsltproc --encoding iso-8859-1 -o download.html download.xsl data.xml
 	xsltproc --encoding utf-8 -o index.html index.xsl data.xml
 	exit 0
 }
 test "$1" = "sort" && {
+	dependencies="xsltproc"
+	assert_tools ${dependencies}
 	xsltproc --encoding utf-8 -o sorted.xml sort.xsl data.xml
 	mv -i sorted.xml data.xml
 }
+mirror_website () {
+	dependencies="wget"
+	assert_tools ${dependencies}
+	local url=$@
+	local domain=`expr "$url" : '^http[s]*://\([^/?]*\)'`
+	wget \
+		--recursive \
+		--no-clobber \
+		--page-requisites \
+		--html-extension \
+		--convert-links \
+		--restrict-file-names=windows \
+		--domains $domain \
+		--no-parent \
+		$url 
+}
+# a mirror is useful for local testing with files
+test "$1" = "mirror" && {
+	echo "downloading the website may take quite some time."
+	mirror_website http://ds.ccc.de/
+	
+}
+#gs -sDEVICE=pdfwrite -dPDFSETTINGS=/ebook -q -o ds100-smaller.pdf ds100.pdf