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kiwi-scp/kiwi_scp/yaml.py

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1.1 KiB
Python

import re
from typing import Optional
import ruamel.yaml
import ruamel.yaml.compat
from ._constants import HEADER_KIWI_CONF_NAME
class YAML(ruamel.yaml.YAML):
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
self.indent(sequence=4, offset=2)
def dump(self, data, stream=None, **kwargs) -> Optional[str]:
into_str: bool = False
if stream is None:
into_str = True
stream = ruamel.yaml.compat.StringIO()
super().dump(data, stream=stream, **kwargs)
if into_str:
return stream.getvalue()
@staticmethod
def _format_kiwi_yml(yml_string: str) -> str:
# insert newline before every main key
yml_string = re.sub(r"^(\S)", r"\n\1", yml_string, flags=re.MULTILINE)
# load header comment from file
with open(HEADER_KIWI_CONF_NAME, 'r') as stream:
yml_string = stream.read() + yml_string
return yml_string
def dump_kiwi_yml(self, data, **kwargs) -> Optional[str]:
return self.dump(data, transform=YAML._format_kiwi_yml, **kwargs)