freshrss: add automatic feed update

freshrss/Dockerfile

@@ -4,7 +4,8 @@ ARG FRESHRSS_VER=1.7.0
 
 ENV UID=991 GID=991 \
     UPLOAD_MAX_SIZE=10M \
-    MEMORY_LIMIT=128M
+    MEMORY_LIMIT=128M \
+    CRON_PERIOD=30m
 
 RUN apk -U add --no-cache \
     tar \

freshrss/README.md

@@ -5,6 +5,7 @@ A free, self-hostable aggregator : https://github.com/FreshRSS/FreshRSS
 #### Features
 - Based on Alpine Linux (wonderfall/nginx-php image)
 - Bundled with nginx and PHP7.1.
+- Automatic feed update (frequency at 30 minutes by default)
 
 #### Build-time variables
 - **FRESHRSS_VER** : version of FreshRSS
@@ -14,6 +15,7 @@ A free, self-hostable aggregator : https://github.com/FreshRSS/FreshRSS
 - **GID** : group id
 - **MEMORY_LIMIT** : php memory limit *(default : 128M)*
 - **UPLOAD_MAX_SIZE** : maximum upload size *(default : 10M)*
+- **CRON_PERIOD** : feed update frequency *(default : 30m)*
 
 #### Volumes
 - **/freshrss/data**

freshrss/rootfs/etc/s6.d/cron/run

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+while true; do
+  php -f /freshrss/app/actualize_script.php
+  sleep <CRON_PERIOD>
+done

freshrss/rootfs/usr/local/bin/run.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 sed -i -e "s/<UPLOAD_MAX_SIZE>/$UPLOAD_MAX_SIZE/g" /nginx/conf/nginx.conf /php/etc/php-fpm.conf \
-       -e "s/<MEMORY_LIMIT>/$MEMORY_LIMIT/g" /php/etc/php-fpm.conf
+       -e "s/<MEMORY_LIMIT>/$MEMORY_LIMIT/g" /php/etc/php-fpm.conf \
+       -e "s/<CRON_PERIOD>/$CRON_PERIOD/g" /etc/s6.d/cron/run
 
 [ ! "$(ls -A /freshrss/data)" ] && cp -R /freshrss/data_tmp/* /freshrss/data/
 chown -R $UID:$GID /freshrss /nginx /php /tmp /etc/s6.d