Make the final bootstrapped image bootable and support rebooting

sysc/after.sh

@@ -35,4 +35,168 @@ done
 # add cd-rom drive
 mknod -m 600 /dev/sr0 b 11 0
 . /usr/src/.env
-exec env - PATH="${PREFIX}/bin" PS1="\w # " bash -i
+
+mkdir /sysa
+pushd /sysa
+
+tar xvjf ../sysa.tar.bz2
+cp -r /sysa/boot /boot
+
+cat > /sbin/init << 'INIT_END'
+#!/usr/bin/bash
+
+# SPDX-FileCopyrightText: 2022 Andrius Štikonas <andrius@stikonas.eu>
+# SPDX-FileCopyrightText: 2021-22 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+set -e
+
+PREFIX=/usr
+LIBDIR="${PREFIX}/lib/i386-unknown-linux-musl"
+SOURCES="${PREFIX}/src"
+DESTDIR=/tmp/destdir
+DISTFILES=/distfiles
+SRCDIR="${SOURCES}"
+
+export PATH="${PREFIX}/bin:${PREFIX}/sbin"
+export HOME=/tmp
+export SOURCE_DATE_EPOCH=0
+
+# shellcheck source=sysa/helpers.sh
+. "${SOURCES}/helpers.sh"
+
+MAKEJOBS="-j${JOBS}"
+
+echo
+echo "Installing packages into sysc"
+
+install_tar() {
+    echo "${1}: installing package"
+    src_apply "$@"
+}
+
+# Begin sysc bootstrapping process
+cd "${SOURCES}"
+exec env -i bash rerun.sh
+INIT_END
+
+chmod +x /sbin/init
+
+cat > "${SOURCES}/rerun.sh" << 'RERUN_END'
+#!/usr/bin/bash
+
+# SPDX-FileCopyrightText: © 2023 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+set -e
+
+# shellcheck source=/dev/null
+. .env
+
+trap 'env - PATH=${PREFIX}/bin PS1="\w # " bash -i' EXIT
+
+# shellcheck source=sysa/helpers.sh
+. "${SOURCES}/helpers.sh"
+
+umask 0022
+
+create_fhs() {
+    # Add the rest of the FHS that we will use and is not created pre-boot
+    mkdir -p /etc /run /var
+    mkdir -p /proc && mount -t proc proc /proc
+    mkdir -p /sys && mount -t sysfs sysfs /sys
+    # Make /tmp a ramdisk (speeds up configure etc significantly)
+    mkdir -p /tmp && mount -t tmpfs tmpfs /tmp
+}
+
+create_fhs
+
+# Activate our previously made some swap
+swapon /swap
+
+# Obtain network connection
+dhcpcd --waitip=4
+
+cd /root
+env - PATH="${PREFIX}/bin" PS1="\w # " HOME="/root" bash --login -i
+reboot
+RERUN_END
+
+chmod +x "${SOURCES}/rerun.sh"
+
+popd
+
+# TODO turn this into a proper build step
+mkdir -p /usr/src/grub
+pushd /usr/src/grub
+
+curl -O https://ftp.gnu.org/gnu/grub/grub-2.06.tar.xz
+tar xf grub-2.06.tar.xz
+cd grub-2.06
+autoreconf
+CFLAGS=-Wno-error ./configure --prefix="${PREFIX}"
+make ${MAKEJOBS}
+make install
+grub-install /dev/sda
+
+cat > /boot/grub/grub.cfg << 'GRUB_END'
+# Config for GNU GRand Unified Bootloader (GRUB)
+# /boot/grub/grub.cfg
+
+# Timeout for menu
+set timeout=5
+
+# Default boot entry
+set default=0
+
+# Menu Colours
+set menu_color_normal=white/black
+set menu_color_highlight=white/green
+
+menuentry 'Linux live-bootstrap (4.9.10, serial console)' {
+	insmod part_msdos
+	set root='hd0,msdos1'
+	linux /boot/linux-4.9.10 root=/dev/sda1 rw console=ttyS0
+}
+
+menuentry 'Linux live-bootstrap (4.9.10, graphical console)' {
+	vbeinfo
+	set gfxpayload=keep
+	set gfxmode=1024x768x32
+	terminal_output gfxterm
+	insmod part_msdos
+	set root='hd0,msdos1'
+	linux /boot/linux-4.9.10 root=/dev/sda1 rw console=tty1
+}
+
+menuentry "Reboot" {
+    reboot
+}
+GRUB_END
+
+popd
+
+cat > /sbin/reboot << 'REBOOT_END'
+echo 1 > /proc/sys/kernel/sysrq
+echo s > /proc/sysrq-trigger
+sleep 1
+echo u > /proc/sysrq-trigger
+sleep 1
+echo b > /proc/sysrq-trigger
+REBOOT_END
+
+chmod +x /sbin/reboot
+
+mkdir /root
+cat > /root/.profile << 'PROFILE'
+. /usr/src/.env
+. "${SOURCES}/helpers.sh"
+PROFILE
+
+sync
+
+cd "/root"
+env - PATH="${PREFIX}/bin" PS1="\w # " HOME="/root" bash --login -i
+reboot