From b636a469a2a4606363c77662cc6c33dd05751091 Mon Sep 17 00:00:00 2001
From: Olaf Meeuwissen <paddy-hack@member.fsf.org>
Date: Fri, 18 Aug 2017 12:20:31 +0900
Subject: [PATCH] Keep package index files small

This is mostly for those cases where Dockerfile RUN instructions do
not run `remove-apt-lists`, either by accident or on purpose.
---
 scripts/tweak-apt-config | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/tweak-apt-config b/scripts/tweak-apt-config
index 624e960..6f34a48 100755
--- a/scripts/tweak-apt-config
+++ b/scripts/tweak-apt-config
@@ -21,6 +21,12 @@ APT::Update::Post-Invoke { "if test -x $cmd; then $cmd; fi"; };
 EOF
 chmod 0644 $cfg/docker-clean
 
+cat > $cfg/docker-compress <<- EOF
+Acquire::GzipIndexes "true";
+Acquire::CompressionTypes::Order { "gz"; };
+EOF
+chmod 0644 $cfg/docker-compress
+
 cat > $cfg/docker-translations <<- EOF
 Acquire::Languages "none";
 EOF