archlinux-docker/scripts/make-rootfs.sh
Emil Velikov f737d64397 Move shell scripts out of the Makefile
Embedding one pieces of code into another (shell script into a makefiles
in this case) is rarely pretty. Split things up, as appropriate.

While here, simplify the rootfs in a few ways:
 - pass only the extra non-base (and effectively group name) package
 - add a handy variable for the fakeroot/fakechroot combo
 - split and rewrap long lines

As a bonus point, this makes it easier to use pattern rules in the
makefile - which will be handy for the upcoming multilib-devel
group/target.

Plus we can check the scripts via shellcheck/etc CI stage, as follow-up.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
2023-09-25 23:40:44 +01:00

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#!/bin/bash
set -euo pipefail
declare -r WRAPPER="fakechroot -- fakeroot"
declare -r GROUP="$1"
declare -r BUILDDIR="$2"
declare -r OUTPUTDIR="$3"
mkdir -vp "$BUILDDIR/alpm-hooks/usr/share/libalpm/hooks"
find /usr/share/libalpm/hooks -exec ln -sf /dev/null "$BUILDDIR/alpm-hooks"{} \;
mkdir -vp "$BUILDDIR/var/lib/pacman/" "$OUTPUTDIR"
install -Dm644 /usr/share/devtools/pacman.conf.d/extra.conf "$BUILDDIR/etc/pacman.conf"
cat pacman-conf.d-noextract.conf >> "$BUILDDIR/etc/pacman.conf"
sed 's/Include = /&rootfs/g' < "$BUILDDIR/etc/pacman.conf" > pacman.conf
$WRAPPER -- \
pacman -Sy -r "$BUILDDIR" \
--noconfirm --dbpath "$BUILDDIR/var/lib/pacman" \
--config pacman.conf \
--noscriptlet \
--hookdir "$BUILDDIR/alpm-hooks/usr/share/libalpm/hooks/" base "$GROUP"
cp --recursive --preserve=timestamps rootfs/* "$BUILDDIR/"
$WRAPPER -- chroot "$BUILDDIR" update-ca-trust
$WRAPPER -- chroot "$BUILDDIR" pacman-key --init
$WRAPPER -- chroot "$BUILDDIR" pacman-key --populate
rm -rf "$BUILDDIR/etc/pacman.d/gnupg/{openpgp-revocs.d/,private-keys-v1.d/,pubring.gpg~,gnupg.S.}*"
ln -fs /usr/lib/os-release "$BUILDDIR/etc/os-release"
# add system users
$WRAPPER -- chroot "$BUILDDIR" /usr/bin/systemd-sysusers --root "/"
# remove passwordless login for root (see CVE-2019-5021 for reference)
sed -i -e 's/^root::/root:!:/' "$BUILDDIR/etc/shadow"
# fakeroot to map the gid/uid of the builder process to root
# fixes #22
fakeroot -- \
tar \
--numeric-owner \
--xattrs \
--acls \
--exclude-from=exclude \
-C "$BUILDDIR" \
-c . \
-f "$OUTPUTDIR/$GROUP.tar"
cd "$OUTPUTDIR"
zstd --long -T0 -8 "$GROUP.tar"
sha256sum "$GROUP.tar.zst" > "$GROUP.tar.zst.SHA256"