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feat(build_library): generate squashfs in cpio

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squashfs is more efficient and plays well with namespaces. Switch to
generating a cpio with a single squashfs files.
This commit is contained in:
Brandon Philips 2013-09-09 16:12:44 -07:00
parent 772994d916
commit f3413b473d
1 changed files with 22 additions and 21 deletions
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43
build_library/vm_image_util.sh
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@ -336,21 +336,20 @@ _write_vmdk_scsi_disk() {
# the cpio is a little complicated because everything gets put into one
# ramfs. So, it does a lot more work at the write disk step.
_write_cpio_disk() {
local cpio_target="${VM_TMP_DIR}/rootcpio"
if [ -f "$2" ]; then
rm $2
fi
# Create the cpio with squashfs embedded
_write_squashfs_root ${cpio_target}
# Create the cpio and gzip it
local cpio=${VM_TMP_DIR}/root.cpio
_write_base_cpio_disk $1 ${cpio} $2
_write_overlay_cpio_disk $1 ${cpio}
# Copy the oem partition in
local oem_mnt="${VM_TMP_DIR}/oem"
_write_dir_to_cpio ${oem_mnt} ${cpio}
sudo rm -R "${VM_TMP_DIR}/oem"
_write_dir_to_cpio "${cpio_target}" "${cpio}"
gzip < ${cpio} > $2
rm -rf "${cpio_target}"
}
_write_dir_to_cpio() {
@ -364,31 +363,33 @@ _write_dir_to_cpio() {
popd >/dev/null
}
_write_base_cpio_disk() {
_write_squashfs_root() {
local cpio_target="$1"
local root_mnt="${VM_TMP_DIR}/rootfs"
local root_build="${VM_TMP_DIR}/rootbuild"
local dst_dir=$(_dst_dir)
local vmlinuz_name="$(_dst_name ".vmlinuz")"
mkdir -p "${root_mnt}"
mkdir -p "${root_build}"
mkdir -p "${cpio_target}"
# Roll the rootfs into the CPIO
# Roll the rootfs into the build dir
sudo mount -o loop,ro "${TEMP_ROOTFS}" "${root_mnt}"
_write_dir_to_cpio "${root_mnt}" "$2"
sudo cp -Ra "${root_mnt}"/. "${root_build}"
cp "${root_mnt}"/boot/vmlinuz "${dst_dir}/${vmlinuz_name}"
sudo umount "${root_mnt}"
rm -rf "${root_mnt}"
}
_write_overlay_cpio_disk() {
local root_overlay="${VM_TMP_DIR}/rootoverlay"
mkdir -p "${root_overlay}"
# Roll the OEM into the build dir
local oem_mnt="${VM_TMP_DIR}/oem"
sudo cp -Ra "${oem_mnt}" "${root_build}"
sudo rm -R "${VM_TMP_DIR}/oem"
# HACK(philips): keep dracut from initing our system by sylinking here.
ln -s sbin/init ${root_overlay}/init
# Build the squashfs
sudo mksquashfs "${root_build}" "${cpio_target}"/newroot.squashfs
ls -la ${cpio_target}
_write_dir_to_cpio "${root_overlay}" "$2"
sudo rm -rf "${root_overlay}"
sudo rm -rf "${root_mnt}" "${root_build}"
}
# If a config format is defined write it!