stage4-build-init.sh

#!/bin/bash -
# Init script installed in stage3 disk image.

# Set up the PATH.
PATH=/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin
export PATH

# Root filesystem is mounted as ro, remount it as rw.
mount -o remount,rw /

# Mount standard filesystems.
mount -t proc /proc /proc
mount -t sysfs /sys /sys
mount -t tmpfs -o "nosuid,size=20%,mode=0755" tmpfs /run
mkdir -p /run/lock

# XXX devtmpfs

# Initialize dynamic linker cache.
ldconfig /usr/lib64 /usr/lib /lib64 /lib

# Fix owner of umount binary.
chown root.root /usr/bin/umount

# There is no hardware clock, just ensure the date is not miles out.
date `date -r /init +%m%d%H%M%Y`

hostname stage4-builder
echo stage4-builder.fedoraproject.org > /etc/hostname

echo
echo "This is the stage4 disk image automatic builder"
echo

# Clean the dnf cache.
dnf clean all

# Cleanup function called on failure or exit.
cleanup ()
{
    set +e
    # Sync disks and shut down.
    sync
    sleep 5
    sync
    mount -o remount,ro / >&/dev/null
    poweroff -f
}
trap cleanup INT QUIT TERM EXIT ERR

set -e
set -x

rm -f /var/tmp/stage4-disk.img
rm -f /var/tmp/stage4-disk.img-t
rm -rf /var/tmp/mnt

# Create a template disk image.
truncate -s 50G /var/tmp/stage4-disk.img-t
mkfs -t ext4 /var/tmp/stage4-disk.img-t

# Create the installroot.
mkdir /var/tmp/mnt
mount -o loop /var/tmp/stage4-disk.img-t /var/tmp/mnt
mkdir /var/tmp/mnt/{dev,proc,sys}
mount -o bind /dev /var/tmp/mnt/dev
mount -o bind /proc /var/tmp/mnt/proc
mount -o bind /sys /var/tmp/mnt/sys
rpm --root /var/tmp/mnt --initdb

# Adding glibc-langpack-en avoids the huge glibc-all-langpacks
# being used.
#
# We need --releasever here because fedora-release isn't
# installed inside the chroot.
#
# strict=0 is like the old --skip-broken option in yum.  We can
# remove it when all @core packages are available.
dnf -y --releasever=25 --installroot=/var/tmp/mnt --setopt=strict=0 \
     install \
         @core \
         glibc-langpack-en

# Do some configuration within the chroot.

# Write an fstab for the chroot.
cat > /var/tmp/mnt/etc/fstab <<EOF
/dev/root / ext4 defaults 0 0
EOF

# Set the hostname.
echo stage4.fedoraproject.org > /var/tmp/mnt/etc/hostname

# Copy local.repo in.
cp /var/tmp/local.repo /var/tmp/mnt/etc/yum.repos.d

# Set up /init (in the chroot) as a symlink.
pushd /var/tmp/mnt
ln -s usr/lib/systemd/systemd init
popd

# Add the riscv-set-date systemd service.
cp /var/tmp/riscv-set-date.service /var/tmp/mnt/etc/systemd/system/
chroot /var/tmp/mnt \
       systemctl enable riscv-set-date

# Add the root-shell systemd service.
cp /var/tmp/root-shell.service /var/tmp/mnt/etc/systemd/system/
chroot /var/tmp/mnt \
       systemctl enable root-shell

# Disable public repos, they don't serve riscv64 packages anyway.
chroot /var/tmp/mnt \
       dnf config-manager --set-disabled updates updates-testing fedora

# Clean DNF cache in the chroot.  This forces the first run of DNF
# by the new machine to refresh the cache and not use the stale
# data from the build environment.
chroot /var/tmp/mnt \
       dnf clean all

# List all the packages which were installed in the chroot
# so they appear in the build.log.
chroot /var/tmp/mnt rpm -qa | sort

# Unmount the chroot.  Unfortunately some processes are still running
# in the chroot, so we can't do that.
sync

# Disk image is built, so move it to the final filename.
# guestfish downloads this, but if it doesn't exist, guestfish
# fails indicating the earlier error.
mv /var/tmp/stage4-disk.img-t /var/tmp/stage4-disk.img

# cleanup() is called automatically here.