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import yaml
from compose.config import types
from compose.const import COMPOSE_SPEC as VERSION
from compose.const import COMPOSEFILE_V1 as V1
def serialize_config_type(dumper, data):
representer = dumper.represent_str
return representer(data.repr())
def serialize_dict_type(dumper, data):
return dumper.represent_dict(data.repr())
def serialize_string(dumper, data):
""" Ensure boolean-like strings are quoted in the output """
representer = dumper.represent_str
if isinstance(data, bytes):
data = data.decode('utf-8')
if data.lower() in ('y', 'n', 'yes', 'no', 'on', 'off', 'true', 'false'):
# Empirically only y/n appears to be an issue, but this might change
# depending on which PyYaml version is being used. Err on safe side.
return dumper.represent_scalar('tag:yaml.org,2002:str', data, style='"')
return representer(data)
def serialize_string_escape_dollar(dumper, data):
""" Ensure boolean-like strings are quoted in the output and escape $ characters """
data = data.replace('$', '$$')
return serialize_string(dumper, data)
yaml.SafeDumper.add_representer(types.MountSpec, serialize_dict_type)
yaml.SafeDumper.add_representer(types.VolumeFromSpec, serialize_config_type)
yaml.SafeDumper.add_representer(types.VolumeSpec, serialize_config_type)
yaml.SafeDumper.add_representer(types.SecurityOpt, serialize_config_type)
yaml.SafeDumper.add_representer(types.ServiceSecret, serialize_dict_type)
yaml.SafeDumper.add_representer(types.ServiceConfig, serialize_dict_type)
yaml.SafeDumper.add_representer(types.ServicePort, serialize_dict_type)
def denormalize_config(config, image_digests=None):
result = {'version': str(config.config_version)}
denormalized_services = [
denormalize_service_dict(
service_dict,
config.version,
image_digests[service_dict['name']] if image_digests else None)
for service_dict in config.services
]
result['services'] = {
service_dict.pop('name'): service_dict
for service_dict in denormalized_services
}
for key in ('networks', 'volumes', 'secrets', 'configs'):
config_dict = getattr(config, key)
if not config_dict:
continue
result[key] = config_dict.copy()
for name, conf in result[key].items():
if 'external_name' in conf:
del conf['external_name']
if 'name' in conf:
if 'external' in conf:
conf['external'] = bool(conf['external'])
return result
def serialize_config(config, image_digests=None, escape_dollar=True):
if escape_dollar:
yaml.SafeDumper.add_representer(str, serialize_string_escape_dollar)
yaml.SafeDumper.add_representer(str, serialize_string_escape_dollar)
else:
yaml.SafeDumper.add_representer(str, serialize_string)
yaml.SafeDumper.add_representer(str, serialize_string)
return yaml.safe_dump(
denormalize_config(config, image_digests),
default_flow_style=False,
indent=2,
width=80,
allow_unicode=True
)
def serialize_ns_time_value(value):
result = (value, 'ns')
table = [
(1000., 'us'),
(1000., 'ms'),
(1000., 's'),
(60., 'm'),
(60., 'h')
]
for stage in table:
tmp = value / stage[0]
if tmp == int(value / stage[0]):
value = tmp
result = (int(value), stage[1])
else:
break
return '{}{}'.format(*result)
def denormalize_service_dict(service_dict, version, image_digest=None):
service_dict = service_dict.copy()
if image_digest:
service_dict['image'] = image_digest
if 'restart' in service_dict:
service_dict['restart'] = types.serialize_restart_spec(
service_dict['restart']
)
if version == V1 and 'network_mode' not in service_dict:
service_dict['network_mode'] = 'bridge'
if 'healthcheck' in service_dict:
if 'interval' in service_dict['healthcheck']:
service_dict['healthcheck']['interval'] = serialize_ns_time_value(
service_dict['healthcheck']['interval']
)
if 'timeout' in service_dict['healthcheck']:
service_dict['healthcheck']['timeout'] = serialize_ns_time_value(
service_dict['healthcheck']['timeout']
)
if 'start_period' in service_dict['healthcheck']:
service_dict['healthcheck']['start_period'] = serialize_ns_time_value(
service_dict['healthcheck']['start_period']
)
if 'ports' in service_dict:
service_dict['ports'] = [
p.legacy_repr() if p.external_ip or version < VERSION else p
for p in service_dict['ports']
]
if 'volumes' in service_dict and (version == V1):
service_dict['volumes'] = [
v.legacy_repr() if isinstance(v, types.MountSpec) else v for v in service_dict['volumes']
]
return service_dict
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