From 4ca43aeb04afbd839fda26874ed6b2acf0b2e854 Mon Sep 17 00:00:00 2001
From: Marko Viitanen <fador@iki.fi>
Date: Wed, 9 Mar 2016 13:22:27 +0200
Subject: [PATCH] Moved required packages and apt-mark showauto output to env
 variables

---
 Dockerfile | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 2491de76..1d8cd083 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,19 +1,14 @@
 FROM ubuntu:15.10
+    ENV REQUIRED_PACKAGES automake autoconf libtool m4 build-essential git yasm
     RUN apt-get update
-    RUN apt-get install -y \
-        automake \
-        autoconf \
-        libtool \
-        m4 \
-        build-essential \
-        git \
-        yasm; \
+    RUN apt-get install -y $REQUIRED_PACKAGES ; \
     git clone --depth=1 git://github.com/ultravideo/kvazaar.git; \
         cd kvazaar; \
         ./autogen.sh; \
         ./configure --disable-shared;\
         make;\
-    apt-get remove --purge -y automake autoconf libtool m4 build-essential git yasm `apt-mark showauto`; \
+    AUTOINSTALLED_PACKAGES=`apt-mark showauto`;\
+    apt-get remove --purge -y $REQUIRED_PACKAGES $AUTOINSTALLED_PACKAGES; \
         apt-get autoremove -y; \
         apt-get clean all; \
         rm -rf /var/lib/apt/lists/*