From 9fb3fce201c3b3fa239bada56b267c0d600fbf44 Mon Sep 17 00:00:00 2001
From: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
Date: Sat, 13 Jan 2024 20:09:19 +0900
Subject: [PATCH] Allow setting KEEP_CACHE=0

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
---
 README.md             | 1 +
 repro-sources-list.sh | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 9e319bd..28377fb 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,7 @@ Examples:
 | `WRITE_SOURCE_DATE_EPOCH` | Write the `SOURCE_DATE_EPOCH` value to a file | `/dev/null`                                                        |
 | `SNAPSHOT_ARCHIVE_BASE`   | Base URL of the snapshot                      | `http://snapshot-cloudflare.debian.org/archive/`, etc. (See below) |
 | `BACKPORTS`               | Enable Debian backports                       | `0`                                                                |
+| `KEEP_CACHE`              | Keep apt cache                                | `1`                                                                |
 
 Distribution-specific default values:
 
diff --git a/repro-sources-list.sh b/repro-sources-list.sh
index d478b6d..29252b0 100755
--- a/repro-sources-list.sh
+++ b/repro-sources-list.sh
@@ -34,6 +34,8 @@ set -eux -o pipefail
 
 . /etc/os-release
 
+: "${KEEP_CACHE:=1}"
+
 keep_apt_cache() {
 	rm -f /etc/apt/apt.conf.d/docker-clean
 	echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' >/etc/apt/apt.conf.d/keep-cache
@@ -59,7 +61,7 @@ case "${ID}" in
 	echo "deb [check-valid-until=no] ${SNAPSHOT_ARCHIVE_BASE}debian-security/${snapshot} ${VERSION_CODENAME}-security main" >>/etc/apt/sources.list
 	echo "deb [check-valid-until=no] ${SNAPSHOT_ARCHIVE_BASE}debian/${snapshot} ${VERSION_CODENAME}-updates main" >>/etc/apt/sources.list
 	if [ "${BACKPORTS}" = 1 ]; then echo "deb [check-valid-until=no] ${SNAPSHOT_ARCHIVE_BASE}debian/${snapshot} ${VERSION_CODENAME}-backports main" >>/etc/apt/sources.list; fi
-	keep_apt_cache
+	if [ "${KEEP_CACHE}" = 1 ]; then keep_apt_cache; fi
 	;;
 "ubuntu")
 	: "${SNAPSHOT_ARCHIVE_BASE:=http://snapshot.ubuntu.com/}"
@@ -75,7 +77,7 @@ case "${ID}" in
 	echo "deb [check-valid-until=no] ${SNAPSHOT_ARCHIVE_BASE}ubuntu/${snapshot} ${VERSION_CODENAME}-security main restricted" >>/etc/apt/sources.list
 	echo "deb [check-valid-until=no] ${SNAPSHOT_ARCHIVE_BASE}ubuntu/${snapshot} ${VERSION_CODENAME}-security universe" >>/etc/apt/sources.list
 	echo "deb [check-valid-until=no] ${SNAPSHOT_ARCHIVE_BASE}ubuntu/${snapshot} ${VERSION_CODENAME}-security multiverse" >>/etc/apt/sources.list
-	keep_apt_cache
+	if [ "${KEEP_CACHE}" = 1 ]; then keep_apt_cache; fi
 	# http://snapshot.ubuntu.com is redirected to https, so we have to install ca-certificates
 	export DEBIAN_FRONTEND=noninteractive
 	apt-get -o Acquire::https::Verify-Peer=false update >&2