You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
3.9 KiB
98 lines
3.9 KiB
import difflib
|
|
from typing import List, Iterator, Union
|
|
|
|
def same_slicer(lst: List[str], start: int, end: int) -> List[str]:
|
|
"""Return a slice of the list, or a single element if start == end."""
|
|
return lst[start:end] if start != end else [lst[start]]
|
|
|
|
def customSequenceMatcher(
|
|
before: List[str],
|
|
after: List[str],
|
|
include_equal: bool = False,
|
|
include_removed: bool = True,
|
|
include_added: bool = True,
|
|
include_replaced: bool = True,
|
|
include_change_type_prefix: bool = True
|
|
) -> Iterator[List[str]]:
|
|
"""
|
|
Compare two sequences and yield differences based on specified parameters.
|
|
|
|
Args:
|
|
before (List[str]): Original sequence
|
|
after (List[str]): Modified sequence
|
|
include_equal (bool): Include unchanged parts
|
|
include_removed (bool): Include removed parts
|
|
include_added (bool): Include added parts
|
|
include_replaced (bool): Include replaced parts
|
|
include_change_type_prefix (bool): Add prefixes to indicate change types
|
|
|
|
Yields:
|
|
List[str]: Differences between sequences
|
|
"""
|
|
cruncher = difflib.SequenceMatcher(isjunk=lambda x: x in " \t", a=before, b=after)
|
|
|
|
for tag, alo, ahi, blo, bhi in cruncher.get_opcodes():
|
|
if include_equal and tag == 'equal':
|
|
yield before[alo:ahi]
|
|
elif include_removed and tag == 'delete':
|
|
prefix = "(removed) " if include_change_type_prefix else ''
|
|
yield [f"{prefix}{line}" for line in same_slicer(before, alo, ahi)]
|
|
elif include_replaced and tag == 'replace':
|
|
prefix_changed = "(changed) " if include_change_type_prefix else ''
|
|
prefix_into = "(into) " if include_change_type_prefix else ''
|
|
yield [f"{prefix_changed}{line}" for line in same_slicer(before, alo, ahi)] + \
|
|
[f"{prefix_into}{line}" for line in same_slicer(after, blo, bhi)]
|
|
elif include_added and tag == 'insert':
|
|
prefix = "(added) " if include_change_type_prefix else ''
|
|
yield [f"{prefix}{line}" for line in same_slicer(after, blo, bhi)]
|
|
|
|
def render_diff(
|
|
previous_version_file_contents: str,
|
|
newest_version_file_contents: str,
|
|
include_equal: bool = False,
|
|
include_removed: bool = True,
|
|
include_added: bool = True,
|
|
include_replaced: bool = True,
|
|
line_feed_sep: str = "\n",
|
|
include_change_type_prefix: bool = True,
|
|
patch_format: bool = False
|
|
) -> str:
|
|
"""
|
|
Render the difference between two file contents.
|
|
|
|
Args:
|
|
previous_version_file_contents (str): Original file contents
|
|
newest_version_file_contents (str): Modified file contents
|
|
include_equal (bool): Include unchanged parts
|
|
include_removed (bool): Include removed parts
|
|
include_added (bool): Include added parts
|
|
include_replaced (bool): Include replaced parts
|
|
line_feed_sep (str): Separator for lines in output
|
|
include_change_type_prefix (bool): Add prefixes to indicate change types
|
|
patch_format (bool): Use patch format for output
|
|
|
|
Returns:
|
|
str: Rendered difference
|
|
"""
|
|
newest_lines = [line.rstrip() for line in newest_version_file_contents.splitlines()]
|
|
previous_lines = [line.rstrip() for line in previous_version_file_contents.splitlines()] if previous_version_file_contents else []
|
|
|
|
if patch_format:
|
|
patch = difflib.unified_diff(previous_lines, newest_lines)
|
|
return line_feed_sep.join(patch)
|
|
|
|
rendered_diff = customSequenceMatcher(
|
|
before=previous_lines,
|
|
after=newest_lines,
|
|
include_equal=include_equal,
|
|
include_removed=include_removed,
|
|
include_added=include_added,
|
|
include_replaced=include_replaced,
|
|
include_change_type_prefix=include_change_type_prefix
|
|
)
|
|
|
|
def flatten(lst: List[Union[str, List[str]]]) -> str:
|
|
return line_feed_sep.join(flatten(x) if isinstance(x, list) else x for x in lst)
|
|
|
|
return flatten(rendered_diff)
|