From 6f33dd84440d65d664bb7d9e4959faff512af752 Mon Sep 17 00:00:00 2001
From: Christophe Vandekerchove <christophe.vandekerchove@cloudwatt.com>
Date: Fri, 26 Feb 2016 14:59:01 +0100
Subject: [PATCH] Added dynamic creation of map only if needed

---
 Dockerfile      |  6 +++---
 smart_launch.sh | 21 +++++++++++++++++++++
 2 files changed, 24 insertions(+), 3 deletions(-)
 create mode 100755 smart_launch.sh

diff --git a/Dockerfile b/Dockerfile
index 34f0e13..50fcd19 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,13 +6,13 @@ WORKDIR /opt
 
 COPY ./factorio.tar.gz /opt
 
-RUN tar -xzf factorio.tar.gz
+COPY ./smart_launch.sh /opt
 
-RUN ["/opt/factorio/bin/x64/factorio", "--create", "save.zip"]
+RUN tar -xzf factorio.tar.gz
 
 WORKDIR /opt/factorio
 
-CMD ["/opt/factorio/bin/x64/factorio", "--disallow-commands", "--start-server", "save.zip"]
+CMD ["./smart_launch.sh"]
 
 EXPOSE 34197/udp
 
diff --git a/smart_launch.sh b/smart_launch.sh
new file mode 100755
index 0000000..8321311
--- /dev/null
+++ b/smart_launch.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+if [ -f /opt/factorio/saves/save.zip ]
+then
+  echo "###"
+  echo "# Using existing map [save.zip]"
+  echo "###"
+else
+  echo "###"
+  echo "# Creating a new map [save.zip]"
+  echo "###"
+  opt/factorio/bin/x64/factorio --create save.zip
+  echo "###"
+  echo "# New map created [save.zip]"
+  echo "###"
+fi
+
+echo "###"
+echo "# Launching Game"
+echo "###"
+exec /opt/factorio/bin/x64/factorio --disallow-commands --start-server save.zip