document how to build on top of an existing tarball

This commit is contained in:
Johannes Schauer Marin Rodrigues 2022-05-22 02:57:01 +02:00
parent d10f320f5d
commit 29b23bbcbc
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1

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@ -6994,6 +6994,17 @@ As a docker/podman replacement:
root
$ rm chroot.tar
You can re-use a chroot tarball created with mmdebstrap for further refinement.
Say you want to create a minimal chroot and a chroot with more packages
installed, then instead of downloading and installing the essential packages
twice you can instead build on top of the already present minimal chroot:
$ mmdebstrap --variant=apt unstable chroot.tar
$ mmdebstrap --variant=custom --setup-hook \
'mmtarfilter "--path-exclude=/dev/*" < chroot.tar | tar -C "$1" -x' \
--customize-hook='chroot "$1" apt-get install --yes pkg1 pkg2' \
'' chroot-full.tar
=head1 ENVIRONMENT VARIABLES
=over 8