def _merge_simple_lists(self, lhs: CommentedSeq, rhs: CommentedSeq,
path: YAMLPath,
node_coord: NodeCoords) -> CommentedSeq:
"""
Merge two CommentedSeq-wrapped lists of Scalars or CommentedSeqs.
Parameters:
1. lhs (CommentedSeq) The merge target.
2. rhs (CommentedSeq) The merge source.
3. path (YAMLPath) Location within the DOM where this merge is taking
place.
4. node_coord (NodeCoords) The RHS root node, its parent, and reference
within its parent; used for config lookups.
Returns: (list) The merged result.
Raises:
- `MergeException` when a clean merge is impossible.
"""
if not isinstance(lhs, CommentedSeq):
raise MergeException(
"Impossible to add Array data to non-Array destination.", path)
merge_mode = self.config.array_merge_mode(node_coord)
if merge_mode is ArrayMergeOpts.LEFT:
return lhs
if merge_mode is ArrayMergeOpts.RIGHT:
return rhs
tagless_lhs = Nodes.tagless_elements(lhs)
for idx, ele in enumerate(rhs):
path_next = path + "[{}]".format(idx)
self.logger.debug("Processing element {} at {}.".format(
idx, path_next),
prefix="Merger::_merge_simple_lists: ",
data=ele)
if merge_mode is ArrayMergeOpts.UNIQUE:
cmp_val = ele
if isinstance(ele, TaggedScalar):
cmp_val = ele.value
self.logger.debug(
"Looking for comparison value, {}, in:".format(cmp_val),
prefix="Merger::_merge_simple_lists: ",
data=tagless_lhs)
if cmp_val in tagless_lhs:
lhs = CommentedSeq([
ele if
(e == cmp_val or
(isinstance(e, TaggedScalar) and e.value == cmp_val))
else e for e in lhs
])
else:
lhs.append(ele)
continue
lhs.append(ele)
return lhs
def _merge_sets(
self, lhs: CommentedSet, rhs: CommentedSet, path: YAMLPath,
node_coord: NodeCoords
) -> CommentedSet:
"""
Merge two YAML sets (CommentedSet-wrapped sets).
Parameters:
1. lhs (CommentedSet) The merge target.
2. rhs (CommentedSet) The merge source.
3. path (YAMLPath) Location within the DOM where this merge is taking
place.
4. node_coord (NodeCoords) The RHS root node, its parent, and reference
within its parent; used for config lookups.
Returns: (CommentedSet) The merged result.
Raises:
- `MergeException` when a clean merge is impossible.
"""
merge_mode = self.config.set_merge_mode(node_coord)
if merge_mode is SetMergeOpts.LEFT:
return lhs
if merge_mode is SetMergeOpts.RIGHT:
return rhs
tagless_lhs = Nodes.tagless_elements(list(lhs))
for ele in rhs:
path_next = (path +
YAMLPath.escape_path_section(ele, path.seperator))
self.logger.debug(
"Processing set element {} at {}.".format(ele, path_next),
prefix="Merger::_merge_sets: ", data=ele)
cmp_val = ele
if isinstance(ele, TaggedScalar):
cmp_val = ele.value
self.logger.debug(
"Looking for comparison value, {}, in:".format(cmp_val),
prefix="Merger::_merge_sets: ", data=tagless_lhs)
if cmp_val in tagless_lhs:
continue
lhs.add(ele)
return lhs
