From 408e6142cb3a0a2e85d60b01854d526201a6a007 Mon Sep 17 00:00:00 2001
From: David Schmitt <118179693+DavidS-ovm@users.noreply.github.com>
Date: Mon, 17 Mar 2025 11:41:26 +0100
Subject: [PATCH] Add `apt clean` to reduce layer size

The downloaded packages do not need to be kept in the layer. Running `apt clean` will remove them from the cache.

To quote from apt's man page:
> clean clears out the local repository of retrieved package files. It removes everything but the lock file from /var/cache/apt/archives/ and /var/cache/apt/archives/partial/.
---
 src/docker-in-docker/install.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/docker-in-docker/install.sh b/src/docker-in-docker/install.sh
index 906393997..a2faa44fa 100755
--- a/src/docker-in-docker/install.sh
+++ b/src/docker-in-docker/install.sh
@@ -27,6 +27,7 @@ set -e
 
 # Clean up
 rm -rf /var/lib/apt/lists/*
+apt clean
 
 # Setup STDERR.
 err() {
@@ -427,6 +428,7 @@ if [ -f "/usr/local/share/docker-init.sh" ]; then
     echo "/usr/local/share/docker-init.sh already exists, so exiting."
     # Clean up
     rm -rf /var/lib/apt/lists/*
+    apt clean
     exit 0
 fi
 echo "docker-init doesn't exist, adding..."
@@ -640,5 +642,6 @@ chown ${USERNAME}:root /usr/local/share/docker-init.sh
 
 # Clean up
 rm -rf /var/lib/apt/lists/*
+apt clean
 
 echo 'docker-in-docker-debian script has completed!'