def print_dockerfile_base():
'''For the purpose of tracking the lines in the dockerfile that
produce packages, return a string containing the lines in the dockerfile
that pertain to the base image'''
base_instr = ''
for instr in df.get_base_instructions(docker_commands):
base_instr = base_instr + instr[0] + ' ' + instr[1] + '\n'
return base_instr
def get_dockerfile_base():
'''Check if the dockerfile's FROM has the 'latest' tag and if so
report a message'''
base_image_tag = df.get_base_image_tag(
df.get_base_instructions(docker_commands))
if base_image_tag[1] == 'latest':
new_image_tag = (base_image_tag[0],
cmds.get_latest_tag(base_image_tag[0]))
return (new_image_tag, dockerfile_using_latest)
else:
return (base_image_tag, '')
def get_dockerfile_base():
'''Get the base image object from the dockerfile base instructions
1. get the instructions around FROM
2. get the base image and tag
3. Make notes based on what the image and tag rules are
4. Return an image object and the base instructions string'''
try:
base_instructions = dockerfile.get_base_instructions(docker_commands)
base_image_tag = dockerfile.get_base_image_tag(base_instructions)
dockerfile_lines = print_dockerfile_base(base_instructions)
# check for scratch
if base_image_tag[0] == 'scratch':
# there is no base image - return no image object
return None
# there should be some image object here
repotag = base_image_tag[0] + dockerfile.tag_separator + \
base_image_tag[1]
from_line = 'FROM ' + repotag
base_image = DockerImage(repotag)
base_image.origins.add_notice_origin(dockerfile_lines)
base_image.name = base_image_tag[0]
# check if there is a tag
if not base_image_tag[1]:
message_string = errors.dockerfile_no_tag.format(
dockerfile_line=from_line)
base_image.origins.add_notice_to_origins(
dockerfile_lines, Notice(message_string, 'warning'))
base_image.tag = 'latest'
else:
base_image.tag = base_image_tag[1]
# check if the tag is 'latest'
if base_image_tag[1] == 'latest':
message_string = errors.dockerfile_using_latest.format(
dockerfile_line=from_line)
base_image.origins.add_notice_to_origins(
dockerfile_lines, Notice(message_string, 'warning'))
return base_image, dockerfile_lines
except ValueError as e:
logger.warning(
errors.cannot_parse_base_image.format(dockerfile=dockerfile_global,
error_msg=e))
return None