From 909afc80cbbddd973eb9300fd13ecf48dc687330 Mon Sep 17 00:00:00 2001
From: Olivier Cuypers <oliviercuyp@gmail.com>
Date: Thu, 24 May 2018 11:56:32 +0200
Subject: [PATCH] Add s3cmd scheduling for automatic backup

---
 s3cmd/Dockerfile |  8 ++++++--
 s3cmd/README.md  | 11 ++++++++++-
 s3cmd/install.sh | 12 ++++++++----
 s3cmd/run.sh     | 11 +++++++++++
 4 files changed, 35 insertions(+), 7 deletions(-)
 create mode 100755 s3cmd/run.sh

diff --git a/s3cmd/Dockerfile b/s3cmd/Dockerfile
index 38cd0b9..4c3327f 100644
--- a/s3cmd/Dockerfile
+++ b/s3cmd/Dockerfile
@@ -1,9 +1,13 @@
-FROM alpine:3.1
+FROM alpine:3.7
 LABEL maintainer="Johannes Schickling <schickling.j@gmail.com>"
 
 ADD install.sh install.sh
 RUN sh install.sh && rm install.sh
 
+ENV SCHEDULE **None**
+
+ADD run.sh /opt/s3cmd/run.sh
+
 WORKDIR /s3
 
-ENTRYPOINT ["s3cmd"]
+ENTRYPOINT ["/opt/s3cmd/run.sh"]
diff --git a/s3cmd/README.md b/s3cmd/README.md
index 765228e..fc4c8a4 100644
--- a/s3cmd/README.md
+++ b/s3cmd/README.md
@@ -1,12 +1,21 @@
 # s3cmd
 Lightweight wrapper around s3cmd
 
-## Usage
+## Basic usage
 
 ```sh
 $ docker run -v $(pwd):/s3 schickling/s3cmd sync . s3://my-bucket
 ```
 
+## Environment variables
+
+- SCHEDULE backup schedule time, see explainatons below
+
+## Automatic Periodic Backups
+
+You can additionally set the SCHEDULE environment variable like -e SCHEDULE="@daily" to run the backup automatically.
+More information about the scheduling can be found [here](http://godoc.org/github.com/robfig/cron#hdr-Predefined_schedules).
+
 ### `s3cmd` documentation
 
 See [here](http://s3tools.org/usage) for the documentation.
diff --git a/s3cmd/install.sh b/s3cmd/install.sh
index a16241b..72e6eb0 100644
--- a/s3cmd/install.sh
+++ b/s3cmd/install.sh
@@ -5,12 +5,16 @@ set -e
 
 # install s3cmd
 apk update
-apk add python py-pip py-setuptools git ca-certificates
+apk add --no-cache python py-pip py-setuptools git ca-certificates
 pip install python-magic
 git clone https://github.com/s3tools/s3cmd.git /tmp/s3cmd
 cd /tmp/s3cmd
 python setup.py install
-
-# cleanup
 apk del git
-rm -rf /var/cache/apk/* /tmp/s3cmd
+rm -rf /tmp/s3cmd
+
+# install go-cron
+apk add --no-cache curl
+curl -L --insecure https://github.com/odise/go-cron/releases/download/v0.0.6/go-cron-linux.gz | zcat > /usr/local/bin/go-cron
+chmod u+x /usr/local/bin/go-cron
+apk del curl
diff --git a/s3cmd/run.sh b/s3cmd/run.sh
new file mode 100755
index 0000000..2b6c886
--- /dev/null
+++ b/s3cmd/run.sh
@@ -0,0 +1,11 @@
+#! /bin/sh
+
+set -e
+
+echo "Running s3cmd ..."
+
+if [ "${SCHEDULE}" = "**None**" ]; then
+  s3cmd "$@"
+else
+  exec go-cron "$SCHEDULE" s3cmd "$@"
+fi