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

README.md

@@ -4,5 +4,18 @@ A nginx-powered container hosting a hugo-built blog regularly pulled off git.
 
 ## Run
 
-`docker run -e REPO_URL=https://git.maride.cc/maride/sec.maride.cc.git -p 80:80 blogker`
+### Auto-Pull Git
 
+If you store your blog data in a git repository, run the container with env `REPO_URL` set to a Git repo:
+
+`docker run -e REPO_URL=https://git.maride.cc/maride/sec.maride.cc.git -p 80:80 -d blogker`
+
+The repository will be pulled and built every 10 minutes.
+
+### Passthrough via Bind
+
+To just use a specific directory as the hugo blog contents, run the container with the repository passed through as bind directory:
+
+`docker run -v /var/myblog:/repo -p 80:80 -d blogker`
+
+The repository will be built every 10 minutes, but you need to implement a mechanism to update the blog repository on your own. This setup can be handy in a testing/dev environment where you don't want to have all your blog posts published right away.

aux/pull-n-build.sh

@@ -8,18 +8,35 @@ set -e -v
 	date
 
 	# check if initial git run
+	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
+		# repo URL set
 		if [ ! -d /repo ]; then
-		# yes - repo needs to be cloned
+			# 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