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import copy |
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from difflib import SequenceMatcher |
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from coalib.results.Diff import ConflictError, Diff |
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from coalib.results.SourceRange import SourceRange |
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def filter_results(original_file_dict, |
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modified_file_dict, |
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original_results, |
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modified_results): |
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""" |
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Filters results for such ones that are unique across file changes |
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:param original_file_dict: Dict of lists of file contents before changes |
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:param modified_file_dict: Dict of lists of file contents after changes |
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:param original_results: List of results of the old files |
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:param modified_results: List of results of the new files |
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:return: List of results from new files that are unique |
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from all those that existed in the old changes |
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""" |
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renamed_files = ensure_files_present(original_file_dict, |
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modified_file_dict) |
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# diffs_dict[file] is a diff between the original and modified file |
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diffs_dict = {} |
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for file in original_file_dict: |
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diffs_dict[file] = Diff.from_string_arrays( |
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original_file_dict[file], |
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modified_file_dict[renamed_files.get(file, file)]) |
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orig_result_diff_dict_dict = remove_result_ranges_diffs(original_results, |
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original_file_dict) |
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mod_result_diff_dict_dict = remove_result_ranges_diffs(modified_results, |
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modified_file_dict) |
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unique_results = [] |
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for m_r in reversed(modified_results): |
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unique = True |
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for o_r in original_results: |
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if basics_match(o_r, m_r): |
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if source_ranges_match(original_file_dict, |
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diffs_dict, |
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orig_result_diff_dict_dict[o_r], |
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mod_result_diff_dict_dict[m_r], |
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renamed_files): |
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# at least one original result matches completely |
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unique = False |
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break |
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if unique: |
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unique_results.append(m_r) |
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return unique_results |
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def basics_match(original_result, |
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modified_result): |
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""" |
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Checks whether the following properties of two results match: |
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* origin |
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* message |
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* severity |
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* debug_msg |
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:param original_result: A result of the old files |
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:param modified_result: A result of the new files |
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:return: Boolean value whether or not the properties match |
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""" |
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return all(getattr(original_result, member) == |
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getattr(modified_result, member) |
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for member in ['origin', 'message', 'severity', 'debug_msg']) |
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def source_ranges_match(original_file_dict, |
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diff_dict, |
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original_result_diff_dict, |
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modified_result_diff_dict, |
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renamed_files): |
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""" |
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Checks whether the SourceRanges of two results match |
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:param original_file_dict: Dict of lists of file contents before changes |
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:param diff_dict: Dict of diffs describing the changes per file |
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:param original_result_diff_dict: diff for each file for this result |
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:param modified_result_diff_dict: guess |
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:param renamed_files: A dictionary containing file renamings across runs |
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:return: Boolean value whether the SourceRanges match |
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""" |
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for file_name in original_file_dict: |
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try: # fails if the affected range of the result get's modified |
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original_total_diff = (diff_dict[file_name] + |
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original_result_diff_dict[file_name]) |
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except ConflictError: |
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return False |
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# original file with file_diff and original_diff applied |
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original_total_file = original_total_diff.modified |
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# modified file with modified_diff applied |
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modified_total_file = modified_result_diff_dict[ |
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renamed_files.get(file_name, file_name)].modified |
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if original_total_file != modified_total_file: |
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return False |
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return True |
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def remove_range(file_contents, source_range): |
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""" |
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removes the chars covered by the sourceRange from the file |
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:param file_contents: list of lines in the file |
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:param source_range: Source Range |
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:return: list of file contents without specified chars removed |
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""" |
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if not file_contents: |
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return [] |
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newfile = list(file_contents) |
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# attention: line numbers in the SourceRange are human-readable, |
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# list indices start with 0 |
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source_range = source_range.expand(file_contents) |
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if source_range.start.line == source_range.end.line: |
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# if it's all in one line, replace the line by it's beginning and end |
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newfile[source_range.start.line - 1] = ( |
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newfile[source_range.start.line - 1][:source_range.start.column-1] |
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+ newfile[source_range.start.line - 1][source_range.end.column:]) |
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if newfile[source_range.start.line - 1] == "": |
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del newfile[source_range.start.line - 1] |
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else: |
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# cut away after start |
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newfile[source_range.start.line - 1] = ( |
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newfile[source_range.start.line - 1][:source_range.start.column-1]) |
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# cut away before end |
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newfile[source_range.end.line - 1] = ( |
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newfile[source_range.end.line - 1][source_range.end.column:]) |
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# start: index = first line number ==> line after first line |
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# end: index = last line -2 ==> line before last line |
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for i in reversed(range( |
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source_range.start.line, source_range.end.line - 1)): |
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del newfile[i] |
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# remove leftover empty lines |
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# the first line here is actually the former `source_range.end.line -1` |
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if newfile[source_range.start.line] == "": |
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del newfile[source_range.start.line] |
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if newfile[source_range.start.line - 1] == "": |
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del newfile[source_range.start.line - 1] |
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return newfile |
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def remove_result_ranges_diffs(result_list, file_dict): |
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""" |
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Calculates the diffs to all files in file_dict that describe the removal of |
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each respective result's affected code. |
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:param result_list: list of results |
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:param file_dict: dict of file contents |
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:return: returnvalue[result][file] is a diff of the changes the |
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removal of this result's affected code would cause for |
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the file. |
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""" |
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result_diff_dict_dict = {} |
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for original_result in result_list: |
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mod_file_dict = copy.deepcopy(file_dict) |
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# gather all source ranges from this result |
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source_ranges = [] |
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# SourceRanges must be sorted backwards and overlaps must be eliminated |
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# this way, the deletion based on sourceRanges is not offset by |
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# previous deletions in the same line that invalidate the indices. |
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previous = None |
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for source_range in sorted(original_result.affected_code, reverse=True): |
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# previous exists and overlaps |
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if previous is not None and source_range.overlaps(previous): |
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combined_sr = SourceRange.join(previous, source_range) |
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previous = combined_sr |
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elif previous is None: |
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previous = source_range |
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# previous exists but it doesn't overlap |
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else: |
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source_ranges.append(previous) |
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previous = source_range |
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# don't forget last entry if there were any: |
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if previous: |
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source_ranges.append(previous) |
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for source_range in source_ranges: |
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file_name = source_range.file |
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new_file = remove_range(mod_file_dict[file_name], |
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source_range) |
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mod_file_dict[file_name] = new_file |
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diff_dict = {} |
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for file_name in file_dict: |
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diff_dict[file_name] = Diff.from_string_arrays( |
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file_dict[file_name], |
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mod_file_dict[file_name]) |
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result_diff_dict_dict[original_result] = diff_dict |
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return result_diff_dict_dict |
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def ensure_files_present(original_file_dict, modified_file_dict): |
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""" |
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Ensures that all files are available as keys in both dicts. |
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:param original_file_dict: Dict of lists of file contents before changes |
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:param modified_file_dict: Dict of lists of file contents after changes |
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:return: Return a dictionary of renamed files. |
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""" |
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original_files = set(original_file_dict.keys()) |
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modified_files = set(modified_file_dict.keys()) |
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affected_files = original_files | modified_files |
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original_unique_files = affected_files - modified_files |
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renamed_files_dict = {} |
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for file in filter( |
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lambda filter_file: filter_file not in original_files, |
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affected_files): |
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for comparable_file in original_unique_files: |
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s = SequenceMatcher( |
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None, |
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''.join(modified_file_dict[file]), |
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''.join(original_file_dict[comparable_file])) |
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if s.real_quick_ratio() >= 0.5 and s.ratio() > 0.5: |
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renamed_files_dict[comparable_file] = file |
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break |
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else: |
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original_file_dict[file] = [] |
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for file in filter( |
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lambda filter_file: filter_file not in modified_files, |
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affected_files): |
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modified_file_dict[file] = [] |
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return renamed_files_dict |
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coala-analyzer /
coala
