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#
# generate initramfs of directory
# usage:
# generate_initramfs <source_dir> <files> <destination_dir/filename>
# example:
# generate_initramfs "./server/boot/stage32_sqfs" "./mnt/openslx.sqfs" "./server/boot/initramfs2"
# generate_initramfs "./server/build/stage31" "." "./server/boot/initramfs"
generate_initramfs() {
[ $# -ne 3 ] && perror "Sanity check failed: generate_initramfs needs exactly two params, but $# were given."
cd "$1" || perror "Cannot cd to '$1'"
rm -f -- "$3"
find $2 | cpio --format="newc" --create | xz --check=crc32 --lzma2=dict=1MiB > "$3"
local PS=(${PIPESTATUS[*]})
[ "x${PS[0]}" != "x0" ] && perror "'find $2' in '$(pwd)' failed."
[ "x${PS[1]}" != "x0" ] && perror "cpio create failed."
[ "x${PS[2]}" != "x0" ] && perror "gzip to '$3' failed."
cd - > /dev/null
pinfo "Created initramfs of $1 at $3"
pinfo "Size: $(du -bsh "$3" | awk 'END {print $1}')"
}
# generates squashfs of directory
# usage:
# generate_squashfs <source_dir> <destination_dir/filename>
generate_squashfs() {
[ $# -ne 2 ] && perror "Sanity check failed: generate_squashfs needs exactly two params, but $# were given."
[ -d "$1" ] || perror "$1 is not a directory."
rm -f -- "$2"
mksquashfs "$1" "$2" -comp xz -b 1M -no-recovery >&6 \
|| perror "mksquashfs failed ($?)."
pinfo "Created squashfs of $1 at $2"
pinfo "Size: $(du -bsh "$2" | awk 'END {print $1}')"
}
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