From 89571e99dd3bca7141488fe41f3f1f01b76789a5 Mon Sep 17 00:00:00 2001
From: maride <git@maride.cc>
Date: Mon, 28 Aug 2023 23:40:36 +0200
Subject: [PATCH] Allow passthrough repos using bind mounts, work in temp
 directory, log to screen and file

---
 README.md           | 15 ++++++++++++++-
 aux/pull-n-build.sh | 33 +++++++++++++++++++++++++--------
 2 files changed, 39 insertions(+), 9 deletions(-)

diff --git a/README.md b/README.md
index b6a120e..4d34e82 100644
--- a/README.md
+++ b/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.
diff --git a/aux/pull-n-build.sh b/aux/pull-n-build.sh
index 43c872d..731ff7b 100755
--- a/aux/pull-n-build.sh
+++ b/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