Allow passthrough repos using bind mounts, work in temp directory, log to screen and file

aux/pull-n-build.sh

@@ -8,18 +8,35 @@ set -e -v
 	date
 
 	# check if initial git run
-	if [ ! -d /repo ]; then
-		# yes - repo needs to be cloned
-		git clone --recurse-submodules $REPO_URL /repo
+	if [ "$REPO_URL" == "" ]; then
+		# no repo URL set.
+		# most likely the repo is passed through as volume
+		# do not pull, treat the repo as-is
+		true
 	else
-		# no - pull existing repo
-		cd /repo && git pull --recurse-submodules
+		# repo URL set
+		if [ ! -d /repo ]; then
+			# repo needs to be cloned
+			git clone --recurse-submodules $REPO_URL /repo
+		else
+			# no - pull existing repo
+			cd /repo && git pull --recurse-submodules
+		fi
 	fi
 
+	# create temporary working directory
+	tmpdir=$(mktemp --directory)
+	# copy over into temporary directory
+	cp -r /repo/* $tmpdir
+
 	# build and copy over
-	cd /repo && \
+	cd $tmpdir && \
 	hugo && \
 	rm -rf /usr/share/nginx/html/* && \
-	cp -R /repo/public/* /usr/share/nginx/html
+	cp -R $tmpdir/public/* /usr/share/nginx/html && \
+	chown nginx:nginx -R /usr/share/nginx/html
 
-} 2>&1 > /var/log/blogker-pull-n-build.log
+	# cleanup
+	rm -rf $tmpdir
+
+} 2>&1 | tee /var/log/blogker-pull-n-build.log