Move static assets out of mounted data dirs

Dockerfile

@@ -7,6 +7,7 @@ RUN go build -o smtpd smtpd.go
 
 # Stage 2: build the final container
 FROM registry.git.autistici.org/ai3/docker/apache2-base:master
+COPY start.sh /start.sh
 COPY build.sh /tmp/build.sh
 COPY conf/ /etc/
 COPY --from=build /go/src/smtpd /usr/bin/smtpd

build.sh

@@ -35,6 +35,14 @@ a2enconf -q serve-cgi-bin
 # Create mountpoint dirs.
 mkdir -p /var/lib/lurker
 
+# Lurker installs some package files in mountpoint directories,
+# so the original files would disappear "below" the mount. To
+# prevent this, we copy the files to a well-known location
+# beforehand, and set up links at run-time.
+mkdir -p /var/lib/lurker-www
+mv /etc/lurker/ui /var/lib/lurker-www/ui
+mv /var/lib/lurker/www/index.html /var/lib/lurker-www/index.html
+
 # Clear the existing default config
 # (this will be mounted externally).
 rm -fr /etc/lurker/*

conf/chaperone.d/start.conf

+lurker_setup.service: {
+    type: oneshot,
+    stdout: inherit,
+    service_groups: INIT,
+    process_timeout: 60,
+    command: "/start.sh",
+}

start.sh

+#!/bin/sh
+
+www_dir=/var/lib/lurker/www
+static_dir=/var/lib/lurker-www
+
+echo "Fixing symlinks..." >&2
+
+if [ ! -e ${www_dir}/imgs ]; then
+    ln -sf /usr/share/lurker/www/imgs ${www_dir}/imgs
+fi
+if [ ! -e ${www_dir}/index.html ]; then
+    ln -sf ${static_dir}/index.html ${www_dir}/index.html
+fi
+if [ ! -e ${www_dir}/ui ]; then
+    ln -sf ${static_dir}/ui ${www_dir}/ui
+fi
+if [ ! -e ${www_dir}/lurker.docroot ]; then
+    touch ${www_dir}/lurker.docroot
+fi
+
+exit 0