gefrickel

#! /bin/bash

#
# move parts of initrd into squashfs images
#

function err {
  echo $1
  exit 1
}

function squash {
  mkdir -p parts
  $mksquashfs $1 parts/$2 -comp xz -noappend -no-progress
  chmod 644 parts/$2
}

dir=$1

[ -d "$dir" ] || err "$dir: not a directory"
cd $dir

[ -d "parts" ] && { echo "$dir: already gefrickelt" ; exit 1 ; }

[ -x "/usr/bin/mksquashfs" ] && mksquashfs="/usr/bin/mksquashfs"
[ -x "/usr/bin/mksquashfs4" ] && mksquashfs="/usr/bin/mksquashfs4"

[ -z "$mksquashfs" ] && err "mksquashfs missing"

# lib vs. lib64
lib_dir=`echo lib*/libc.so.*`
lib_dir=${lib_dir%%/*}

# - - -  lib/{modules,firmware}  - - -
#
# all mods ex loop & squashfs
#
m_dir=`echo lib/modules/*/initrd`
[ -d "$m_dir" ] || err "no kernel module dir"
mkdir -p "b/$m_dir"
for i in loop squashfs lz4_decompress ; do
  [ -f $m_dir/$i.ko ] && mv $m_dir/$i.ko b/$m_dir
done
mkdir -p a/lib
mv lib/modules a/lib
[ -d lib/firmware ] && mv lib/firmware a/lib
# but NOT udev
# [ -d lib/udev ] && mv lib/udev a/lib
mv b/lib/modules lib
squash a 00_lib
rm -rf a b

# - - -  usr  - - -
#
# keep libs for linuxrc
#
mkdir -p "b/usr/$lib_dir"
for i in usr/$lib_dir/lib* ; do
  case $i in *librpm*) continue ;; esac
  mv $i b/usr/$lib_dir
done
mkdir -p b/usr/bin
mv usr/bin/kmod b/usr/bin
mkdir -p a
mv usr a
mv b/usr .
squash a 01_usr
rm -rf a b