Files
spack/lib/spack/external/ruamel/yaml/comments.py
2021-02-01 11:30:25 -06:00

487 lines
14 KiB
Python

# coding: utf-8
from __future__ import absolute_import
from __future__ import print_function
"""
stuff to deal with comments and formatting on dict/list/ordereddict/set
these are not really related, formatting could be factored out as
a separate base
"""
import sys
if sys.version_info >= (3, 3):
from collections.abc import MutableSet
else:
from collections import MutableSet
__all__ = ["CommentedSeq", "CommentedMap", "CommentedOrderedMap",
"CommentedSet", 'comment_attrib', 'merge_attrib']
try:
from .compat import ordereddict
except ImportError:
from ruamel.yaml.compat import ordereddict
comment_attrib = '_yaml_comment'
format_attrib = '_yaml_format'
line_col_attrib = '_yaml_line_col'
anchor_attrib = '_yaml_anchor'
merge_attrib = '_yaml_merge'
tag_attrib = '_yaml_tag'
class Comment(object):
# sys.getsize tested the Comment objects, __slots__ make them bigger
# and adding self.end did not matter
attrib = comment_attrib
def __init__(self):
self.comment = None # [post, [pre]]
# map key (mapping/omap/dict) or index (sequence/list) to a list of
# dict: post_key, pre_key, post_value, pre_value
# list: pre item, post item
self._items = {}
# self._start = [] # should not put these on first item
self._end = [] # end of document comments
def __str__(self):
if self._end:
end = ',\n end=' + str(self._end)
else:
end = ''
return "Comment(comment={0},\n items={1}{2})".format(
self.comment, self._items, end)
@property
def items(self):
return self._items
@property
def end(self):
return self._end
@end.setter
def end(self, value):
self._end = value
@property
def start(self):
return self._start
@start.setter
def start(self, value):
self._start = value
# to distinguish key from None
def NoComment():
pass
class Format(object):
attrib = format_attrib
def __init__(self):
self._flow_style = None
def set_flow_style(self):
self._flow_style = True
def set_block_style(self):
self._flow_style = False
def flow_style(self, default=None):
"""if default (the flow_style) is None, the flow style tacked on to
the object explicitly will be taken. If that is None as well the
default flow style rules the format down the line, or the type
of the constituent values (simple -> flow, map/list -> block)"""
if self._flow_style is None:
return default
return self._flow_style
class LineCol(object):
attrib = line_col_attrib
def __init__(self):
self.line = None
self.col = None
self.data = None
def add_kv_line_col(self, key, data):
if self.data is None:
self.data = {}
self.data[key] = data
def key(self, k):
return self._kv(k, 0, 1)
def value(self, k):
return self._kv(k, 2, 3)
def _kv(self, k, x0, x1):
if self.data is None:
return None
data = self.data[k]
return data[x0], data[x1]
def item(self, idx):
if self.data is None:
return None
return self.data[idx][0], self.data[idx][1]
def add_idx_line_col(self, key, data):
if self.data is None:
self.data = {}
self.data[key] = data
class Anchor(object):
attrib = anchor_attrib
def __init__(self):
self.value = None
self.always_dump = False
class Tag(object):
"""store tag information for roundtripping"""
attrib = tag_attrib
def __init__(self):
self.value = None
class CommentedBase(object):
@property
def ca(self):
if not hasattr(self, Comment.attrib):
setattr(self, Comment.attrib, Comment())
return getattr(self, Comment.attrib)
def yaml_end_comment_extend(self, comment, clear=False):
if clear:
self.ca.end = []
self.ca.end.extend(comment)
def yaml_key_comment_extend(self, key, comment, clear=False):
l = self.ca._items.setdefault(key, [None, None, None, None])
if clear or l[1] is None:
if comment[1] is not None:
assert isinstance(comment[1], list)
l[1] = comment[1]
else:
l[1].extend(comment[0])
l[0] = comment[0]
def yaml_value_comment_extend(self, key, comment, clear=False):
l = self.ca._items.setdefault(key, [None, None, None, None])
if clear or l[3] is None:
if comment[1] is not None:
assert isinstance(comment[1], list)
l[3] = comment[1]
else:
l[3].extend(comment[0])
l[2] = comment[0]
def yaml_set_start_comment(self, comment, indent=0):
"""overwrites any preceding comment lines on an object
expects comment to be without `#` and possible have mutlple lines
"""
from .error import Mark
from .tokens import CommentToken
pre_comments = self._yaml_get_pre_comment()
if comment[-1] == '\n':
comment = comment[:-1] # strip final newline if there
start_mark = Mark(None, None, None, indent, None, None)
for com in comment.split('\n'):
pre_comments.append(CommentToken('# ' + com + '\n', start_mark, None))
@property
def fa(self):
"""format attribute
set_flow_style()/set_block_style()"""
if not hasattr(self, Format.attrib):
setattr(self, Format.attrib, Format())
return getattr(self, Format.attrib)
def yaml_add_eol_comment(self, comment, key=NoComment, column=None):
"""
there is a problem as eol comments should start with ' #'
(but at the beginning of the line the space doesn't have to be before
the #. The column index is for the # mark
"""
from .tokens import CommentToken
from .error import Mark
if column is None:
column = self._yaml_get_column(key)
if comment[0] != '#':
comment = '# ' + comment
if column is None:
if comment[0] == '#':
comment = ' ' + comment
column = 0
start_mark = Mark(None, None, None, column, None, None)
ct = [CommentToken(comment, start_mark, None), None]
self._yaml_add_eol_comment(ct, key=key)
@property
def lc(self):
if not hasattr(self, LineCol.attrib):
setattr(self, LineCol.attrib, LineCol())
return getattr(self, LineCol.attrib)
def _yaml_set_line_col(self, line, col):
self.lc.line = line
self.lc.col = col
def _yaml_set_kv_line_col(self, key, data):
self.lc.add_kv_line_col(key, data)
def _yaml_set_idx_line_col(self, key, data):
self.lc.add_idx_line_col(key, data)
@property
def anchor(self):
if not hasattr(self, Anchor.attrib):
setattr(self, Anchor.attrib, Anchor())
return getattr(self, Anchor.attrib)
def yaml_anchor(self):
if not hasattr(self, Anchor.attrib):
return None
return self.anchor
def yaml_set_anchor(self, value, always_dump=False):
self.anchor.value = value
self.anchor.always_dump = always_dump
@property
def tag(self):
if not hasattr(self, Tag.attrib):
setattr(self, Tag.attrib, Tag())
return getattr(self, Tag.attrib)
def yaml_set_tag(self, value):
self.tag.value = value
class CommentedSeq(list, CommentedBase):
__slots__ = [Comment.attrib, ]
def _yaml_add_comment(self, comment, key=NoComment):
if key is not NoComment:
self.yaml_key_comment_extend(key, comment)
else:
self.ca.comment = comment
def _yaml_add_eol_comment(self, comment, key):
self._yaml_add_comment(comment, key=key)
def _yaml_get_columnX(self, key):
return self.ca.items[key][0].start_mark.column
def insert(self, idx, val):
"""the comments after the insertion have to move forward"""
list.insert(self, idx, val)
for list_index in sorted(self.ca.items, reverse=True):
if list_index < idx:
break
self.ca.items[list_index+1] = self.ca.items.pop(list_index)
def pop(self, idx):
res = list.pop(self, idx)
self.ca.items.pop(idx, None) # might not be there -> default value
for list_index in sorted(self.ca.items):
if list_index < idx:
continue
self.ca.items[list_index-1] = self.ca.items.pop(list_index)
return res
def _yaml_get_column(self, key):
column = None
sel_idx = None
pre, post = key-1, key+1
if pre in self.ca.items:
sel_idx = pre
elif post in self.ca.items:
sel_idx = post
else:
# self.ca.items is not ordered
for row_idx, k1 in enumerate(self):
if row_idx >= key:
break
if row_idx not in self.ca.items:
continue
sel_idx = row_idx
if sel_idx is not None:
column = self._yaml_get_columnX(sel_idx)
return column
def _yaml_get_pre_comment(self):
if self.ca.comment is None:
pre_comments = []
self.ca.comment = [None, pre_comments]
else:
pre_comments = self.ca.comment[1] = []
return pre_comments
class CommentedMap(ordereddict, CommentedBase):
__slots__ = [Comment.attrib, ]
def _yaml_add_comment(self, comment, key=NoComment, value=NoComment):
"""values is set to key to indicate a value attachment of comment"""
if key is not NoComment:
self.yaml_key_comment_extend(key, comment)
return
if value is not NoComment:
self.yaml_value_comment_extend(value, comment)
else:
self.ca.comment = comment
def _yaml_add_eol_comment(self, comment, key):
"""add on the value line, with value specified by the key"""
self._yaml_add_comment(comment, value=key)
def _yaml_get_columnX(self, key):
return self.ca.items[key][2].start_mark.column
def _yaml_get_column(self, key):
column = None
sel_idx = None
pre, post, last = None, None, None
for x in self:
if pre is not None and x != key:
post = x
break
if x == key:
pre = last
last = x
if pre in self.ca.items:
sel_idx = pre
elif post in self.ca.items:
sel_idx = post
else:
# self.ca.items is not ordered
for row_idx, k1 in enumerate(self):
if k1 >= key:
break
if k1 not in self.ca.items:
continue
sel_idx = k1
if sel_idx is not None:
column = self._yaml_get_columnX(sel_idx)
return column
def _yaml_get_pre_comment(self):
if self.ca.comment is None:
pre_comments = []
self.ca.comment = [None, pre_comments]
else:
pre_comments = self.ca.comment[1] = []
return pre_comments
def update(self, *vals, **kwds):
try:
ordereddict.update(self, *vals, **kwds)
except TypeError:
# probably a dict that is used
for x in vals:
self[x] = vals[x]
def insert(self, pos, key, value, comment=None):
"""insert key value into given position
attach comment if provided
"""
ordereddict.insert(self, pos, key, value)
if comment is not None:
self.yaml_add_eol_comment(comment, key=key)
def mlget(self, key, default=None, list_ok=False):
"""multi-level get that expects dicts within dicts"""
if not isinstance(key, list):
return self.get(key, default)
# assume that the key is a list of recursively accessible dicts
def get_one_level(key_list, level, d):
if not list_ok:
assert isinstance(d, dict)
if level >= len(key_list):
if level > len(key_list):
raise IndexError
return d[key_list[level-1]]
return get_one_level(key_list, level+1, d[key_list[level-1]])
try:
return get_one_level(key, 1, self)
except KeyError:
return default
except (TypeError, IndexError):
if not list_ok:
raise
return default
def __getitem__(self, key):
try:
return ordereddict.__getitem__(self, key)
except KeyError:
for merged in getattr(self, merge_attrib, []):
if key in merged[1]:
return merged[1][key]
raise
def get(self, key, default=None):
try:
return self.__getitem__(key)
except:
return default
@property
def merge(self):
if not hasattr(self, merge_attrib):
setattr(self, merge_attrib, [])
return getattr(self, merge_attrib)
def add_yaml_merge(self, value):
self.merge.extend(value)
class CommentedOrderedMap(CommentedMap):
__slots__ = [Comment.attrib, ]
class CommentedSet(MutableSet, CommentedMap):
__slots__ = [Comment.attrib, 'odict']
def __init__(self, values=None):
self.odict = ordereddict()
MutableSet.__init__(self)
if values is not None:
self |= values
def add(self, value):
"""Add an element."""
self.odict[value] = None
def discard(self, value):
"""Remove an element. Do not raise an exception if absent."""
del self.odict[value]
def __contains__(self, x):
return x in self.odict
def __iter__(self):
for x in self.odict:
yield x
def __len__(self):
return len(self.odict)
def __repr__(self):
return 'set({0!r})'.format(self.odict.keys())