def load_docker_commands(dockerfile_path):
'''Given a dockerfile get a persistent list of docker commands'''
if not os.path.isfile(dockerfile_path):
raise IOError('{} does not exist'.format(dockerfile_path))
global docker_commands
docker_commands = dockerfile.get_directive_list(
dockerfile.get_command_list(dockerfile_path))
global dockerfile_global
dockerfile_global = dockerfile_path
def set_imported_layers(docker_image):
'''Given a Docker image object that was built from a Dockerfile, set the
layers that were imported using the Dockerfile's FROM command or the ones
that came before it'''
dockerfile_lines = dockerfile.get_command_list(dockerfile_global)
index = -1
from_line = ''
for line in dockerfile_lines:
if 'FROM' in line:
from_line = line
break
for layer in docker_image.layers:
instr = created_to_instruction(layer.created_by)
if instr in dockerfile_lines:
index = docker_image.layers.index(layer)
break
if index != -1:
# index was set so all layers before this index has been imported
for i in range(0, index):
docker_image.layers[i].import_str = from_line
def set_imported_layers(docker_image):
'''Given a Docker image object that was built from a Dockerfile, set the
layers that were imported using the Dockerfile's FROM command or the ones
that came before it'''
index = -1
from_line = ''
dockerfile_lines = docker_commands
for cmd in dockerfile_lines:
if cmd['instruction'] == 'FROM':
from_line = cmd['content'].rstrip()
break
command_list = dockerfile.get_command_list(dockerfile_lines)
for layer in docker_image.layers:
instr = created_to_instruction(layer.created_by)
if instr in command_list:
index = docker_image.layers.index(layer)
break
if index != -1:
# index was set so all layers before this index has been imported
for i in range(0, index):
docker_image.layers[i].import_str = from_line