def drop_into_layer(image_obj, layer_index):
"""Given the image object and the layer index, mount all the layers
upto the specified layer index and drop into a shell session"""
rootfs.set_up()
if layer_index == 0:
# mount only one layer
target = rootfs.mount_base_layer(
image_obj.layers[layer_index].tar_file)
else:
# mount all layers uptil the provided layer index
target = report.mount_overlay_fs(image_obj, layer_index)
# check if there is a shell
shell = check_shell()
if shell:
rootfs.prep_rootfs(target)
print("Done. Run 'sudo chroot . {}' to look around.".format(shell))
else:
print("A shell binary doesn't exist in the filesystem. You're on "
"your own.")
print("Working directory is: {}".format(get_mount_path()))
sys.exit(0)
'execute with. Useful when testing commands in the '
'snippet library')
args = parser.parse_args()
# first, mount all the layers in the image
report.setup(image_tag_string=args.image)
image_obj = report.load_full_image(args.image)
if image_obj.origins.is_empty():
# image loading was successful
# proceed mounting diff filesystems
if len(image_obj.layers) == 1:
# mount only one layer
target = rootfs.mount_base_layer(image_obj.layers[0].tar_file)
rootfs.prep_rootfs(target)
else:
report.mount_overlay_fs(image_obj, len(image_obj.layers) - 1)
# invoke commands in chroot
# if we're looking up the snippets library
# we should see 'snippets' in the keys
if 'snippets' in args.keys and 'packages' in args.keys:
# get the package info that corresponds to the package name
# or get the default
last = args.keys.pop()
info_list = look_up_lib(args.keys)
info_dict = command_lib.check_for_unique_package(
info_list, args.package)[last]
else:
info_dict = look_up_lib(args.keys)
# try to invoke the commands
try:
result = command_lib.get_pkg_attr_list(