def expand_from_images(dfobj):
'''Replace all parent_image values with their full image@digest_type:digest
value. Update the structure dictionary with the same information.
dfobj: the Dockerfile object created using get_dockerfile_obj'''
# update parent_images
images = parse_from_image(dfobj)
for i, img in enumerate(images):
# don't re-pull digest if already available
if not img['digest_type'] and not img['digest']:
if not img['tag']:
img['tag'] = 'latest'
image = container.get_image(img['name'] + tag_separator +
img['tag'])
if image is not None:
dfobj.parent_images[i] = container.get_image_digest(image)
else:
logger.error("Error pinning digest to '%s'. Image not found.",
dfobj.parent_images[i])
# update structure
counter = 0
for i, command_dict in enumerate(dfobj.structure):
if command_dict['instruction'] == 'FROM':
# Pull digest in order of parent_images
dfobj.structure[i]['content'] = command_dict['instruction'] + \
' ' + dfobj.parent_images[counter] + '\n'
dfobj.structure[i]['value'] = dfobj.parent_images[counter]
counter = counter + 1
def __init__(self, repotag=None):
'''Initialize using repotag'''
super().__init__(repotag)
self.__repotags = []
self.__history = None
if self.repotag is None:
raise NameError("Image object initialized with no repotag")
# parse the repotag
repo_dict = general.parse_image_string(self._repotag)
self._name = repo_dict.get('name')
self._tag = repo_dict.get('tag')
self.set_checksum(
repo_dict.get('digest_type'), repo_dict.get('digest'))
if not self.checksum and general.check_tar(repotag) is False:
# if there is no checksum, get the digest type
docker_image = container.check_image(self._repotag)
# this object could be representing an image built from
# a Dockerfile, so it may not have a digest
# so check for that condition
if docker_image.attrs['RepoDigests']:
image_name_digest = container.get_image_digest(docker_image)
repo_dict = general.parse_image_string(image_name_digest)
self.set_checksum(
repo_dict.get('digest_type'), repo_dict.get('digest'))