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# coding: utf-8
from __future__ import absolute_import
from __future__ import print_function
__all__ = ["ScalarString", "PreservedScalarString"]
try:
from .compat import text_type
except (ImportError, ValueError): # for Jython
from ruamel.yaml.compat import text_type
class ScalarString(text_type):
def __new__(cls, *args, **kw):
return text_type.__new__(cls, *args, **kw)
class PreservedScalarString(ScalarString):
def __new__(cls, value):
return ScalarString.__new__(cls, value)
def preserve_literal(s):
return PreservedScalarString(s.replace('\r\n', '\n').replace('\r', '\n'))
def walk_tree(base):
"""
the routine here walks over a simple yaml tree (recursing in
dict values and list items) and converts strings that
have multiple lines to literal scalars
"""
from ruamel.yaml.compat import string_types
if isinstance(base, dict):
for k in base:
v = base[k]
if isinstance(v, string_types) and '\n' in v:
base[k] = preserve_literal(v)
else:
walk_tree(v)
elif isinstance(base, list):
for idx, elem in enumerate(base):
if isinstance(elem, string_types) and '\n' in elem:
print(elem)
base[idx] = preserve_literal(elem)
else:
walk_tree(elem)
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