def load_base_image():
'''Create base image from dockerfile instructions and return the image'''
base_image, dockerfile_lines = dhelper.get_dockerfile_base()
# try to get image metadata
if not container.check_image(base_image.repotag):
# if no base image is found, give a warning and continue
if not container.pull_image(base_image.repotag):
logger.warning(
errors.cannot_find_image.format(imagetag=base_image.repotag))
try:
base_image.load_image()
except NameError as error:
logger.warning('Error in loading base image: ' + str(error))
base_image.origins.add_notice_to_origins(dockerfile_lines,
Notice(str(error), 'error'))
except subprocess.CalledProcessError as error:
logger.warning('Error in loading base image: ' +
str(error.output, 'utf-8'))
base_image.origins.add_notice_to_origins(
dockerfile_lines, Notice(str(error.output, 'utf-8'), 'error'))
except IOError as error:
logger.warning('Error in loading base image: ' + str(error))
base_image.origins.add_notice_to_origin(dockerfile_lines,
Notice(str(error), 'error'))
return base_image
def setup(dockerfile=None, image_tag_string=None):
'''Any initial setup'''
# generate random names for image, container, and tag
general.initialize_names()
# load the cache
cache.load()
# load dockerfile if present
if dockerfile:
dhelper.load_docker_commands(dockerfile)
# check if the docker image is present
if image_tag_string:
if not container.check_image(image_tag_string):
# if no docker image is present, try to pull it
if not container.pull_image(image_tag_string):
logger.fatal(
errors.cannot_find_image.format(imagetag=image_tag_string))
sys.exit()
# create temporary working directory
if not os.path.exists(constants.temp_folder):
os.mkdir(constants.temp_folder)
# set up folders for rootfs operations
rootfs.set_up()