#!/bin/bash -
# @configure_input@
# Copyright (C) 2009 Red Hat Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

# This is called from the Makefile to build the initramfs.

set -e

# If you want to do some extra debugging and diagnosis of the
# initramfs image, then uncomment this line.  This makes the image
# larger.
debug=yes

modules="-i kernel -i bash -i coreutils -i lvm2 -i ntfs-3g -i nfs-utils -i util-linux-ng -i MAKEDEV -i net-tools"

if [ "x$debug" = "xyes" ]; then
    modules="$modules -i module-init-tools -i procps -i strace -i iputils"
fi

# Decide on names for the final output.  These have to match Makefile.am.
output=initramfs.@REPO@.@host_cpu@.img
koutput=vmlinuz.@REPO@.@host_cpu@
rm -f $output $koutput

# Create the basic initramfs.
@FEBOOTSTRAP@ $modules @REPO@ initramfs @MIRROR@

# Nuke some stuff.  The kernel pulls mkinitrd and plymouth which pulls in
# all of Python.  Sheez.
find initramfs -name '*plymouth*' -print0 | xargs -0 rm -rf
find initramfs -name '*python*' -print0 | xargs -0 rm -rf

# Modules take up nearly half of the image.  It's a rough guess that
# we don't need any drivers (which take up most of the space).
# (We need to keep kernel/net/sunrpc for NFS)
rm -rf initramfs/lib/modules/*/kernel/{drivers,sound}
rm -rf initramfs/lib/modules/*/kernel/arch/x86/kvm

# Pull the kernel out into the current directory.  We don't want it in
# the initramfs image.
mv initramfs/boot/vmlinuz* $koutput
rm -rf initramfs/boot

# Minimize the image.
@FEBOOTSTRAP_MINIMIZE@ initramfs

# Add some missing configuration files.
if [ ! -f initramfs/etc/hosts ]; then
    cat > initramfs/etc/hosts <<'__EOF__'
127.0.0.1 guestfs localhost.localdomain localhost
::1       localhost6.localdomain6 localhost6
__EOF__
fi

if [ ! -f initramfs/etc/fstab ]; then
    touch initramfs/etc/fstab
fi

# Copy the daemon into the filesystem.
#cp daemon/guestfsd initramfs/sbin

# Create the init script.
cat > initramfs/init <<'__EOF__'
#!/bin/sh
PATH=/sbin:/usr/sbin:$PATH
MAKEDEV mem null port zero core full ram tty console fd \
  hda hdb hdc hdd sda sdb sdc sdd loop sd
mount -t proc /proc /proc
mount -t sysfs /sys /sys
mount -t devpts -o gid=5,mode=620 /dev/pts /dev/pts
modprobe nfsd
/sbin/ifconfig lo 127.0.0.1
lvm vgscan --ignorelockingfailure
lvm vgchange -ay --ignorelockingfailure
rpcbind
rpc.statd
rpc.nfsd 4
rpc.mountd
__EOF__

if [ "x$debug" != "xyes" ]; then
    echo exec guestfsd -f >> initramfs/init
else
    echo guestfsd >> initramfs/init
    echo exec bash -i >> initramfs/init
fi

chmod +x initramfs/init

# Generate final image.
@FEBOOTSTRAP_TO_INITRAMFS@ initramfs > $output-t
mv $output-t $output
ls -lh $output
ls -lh $koutput