Create cronjob from entrypoint

Dockerfile

@@ -15,9 +15,6 @@ RUN apt-get update && \
     pip install --no-cache-dir git+https://github.com/jaroslawhartman/withings-sync.git@"${WITHINGS_SYNC_COMMIT}"
 
 COPY entrypoint.sh /entrypoint.sh
-COPY withings-sync /etc/cron.d/withings-sync
-
-RUN chmod 0644 /etc/cron.d/withings-sync
 
 ENTRYPOINT ["/tini", "--"]
 CMD ["/entrypoint.sh"]

entrypoint.sh

@@ -2,6 +2,11 @@
 
 set -eu
 
+garmin_username="${GARMIN_USERNAME:-UNSET}"
+garmin_password="${GARMIN_PASSWORD:-UNSET}"
+env_file="/root/env.sh"
+cron_file="/etc/cron.d/withings-sync"
+
 # trap ctrl-c and call ctrl_c()
 trap ctrl_c INT
 
@@ -14,7 +19,15 @@ echo "Starting cron..."
 /etc/init.d/cron start
 
 echo "Setting environment variables for cron..."
-printenv | sed 's/^\(.*\)$/export \1/g' > /root/cron_env.sh
+touch "${env_file}"
+echo "export GARMIN_USERNAME=${garmin_username}" >> "${env_file}"
+echo "export GARMIN_PASSWORD=${garmin_password}" >> "${env_file}"
+
+echo "Setting up cronjob..."
+cat << EOF > "${cron_file}"
+0 10 * * * root . "${env_file}"; /usr/local/bin/withings-sync -v >> /var/log/withings-sync.log 2>&1
+EOF
+chmod 0644 "${cron_file}"
 
 while true;
 do