From a3fff16fd6cf180f36063d642671cbc3b4c9d2e1 Mon Sep 17 00:00:00 2001
From: Helmut Grohne <helmut@subdivi.de>
Date: Sat, 7 Jan 2023 21:32:43 +0100
Subject: debvm-create: allow skipping package lists

---
 debvm-create | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/debvm-create b/debvm-create
index f3f9895..1f5e8df 100755
--- a/debvm-create
+++ b/debvm-create
@@ -75,7 +75,16 @@ The following tasks may be skipped.
 
 =over 4
 
-=item B<systemdnetwork> skips installing B<libnss-resolve> as well as automatic network configuration via B<systemd-networkd>.
+=item B<systemdnetwork>
+
+skips installing B<libnss-resolve> as well as automatic network configuration via B<systemd-networkd>.
+
+=item B<packagelists>
+
+reduces the package lists inside the image.
+The B<available> database for B<dpkg> is not created.
+The package lists used by B<apt> are deleted.
+This generally produces a smaller image, but you need to run B<apt update> before installing packages and B<dpkg --set-selections> does not work.
 
 =back
 
@@ -332,10 +341,12 @@ if test -n "$SSHKEY"; then
 		"$@"
 fi
 
-set -- --skip=cleanup/apt/lists "$@"
+if ! check_skip packagelists; then
+	set -- --skip=cleanup/apt/lists "$@"
 
-# We need /var/lib/dpkg/available for dpkg --set-selections to work.
-set -- '--customize-hook=chroot "$1" apt-cache dumpavail | chroot "$1" dpkg --update-avail' "$@"
+	# We need /var/lib/dpkg/available for dpkg --set-selections to work.
+	set -- '--customize-hook=chroot "$1" apt-cache dumpavail | chroot "$1" dpkg --update-avail' "$@"
+fi
 
 if test "$DEBVER" -le 8; then
 	# Use obsolete and expired keys.
-- 
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