another-take…

issue_generator_clang_format.py
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			#!/usr/bin/env python3

			from . import print_debug, print_info
			from .issue_generator_clang_tool import ClangToolIssueGenerator
			import os
			import re
			import copy
			import difflib
			import subprocess


			class ClangFormatIssueGenerator(ClangToolIssueGenerator):
			"""issue generator for clang format"""

			def __init__(self, **kwargs):
			kwargs['clang_tool_executable'] = kwargs.pop('clang_format_executable',
			'clang-format')
			super().__init__('clang-format', **kwargs)

			def _get_classifiaction(self, issue):
			return (['Style'], 'info')

			def generate_issues(self):
			issue = {}
			for filename in self._files:
			with open(filename, 'r') as fh:
			unformated_file = fh.readlines()

			command = copy.copy(self._command)
			command.append(filename)
			formated_file = list(self._run_command(command))

			# diffs = difflib.unified_diff(unformated_file, formated_file, n=0)

			# print(diffs)
			# for diff in diffs:
			# print(diff, end='')

			s = difflib.SequenceMatcher(None, unformated_file, formated_file)
			for tag, i1, i2, j1, j2 in s.get_opcodes():
			if tag != 'equal':
			diff = list(difflib.unified_diff(unformated_file[i1:i2], formated_file[j1:j2]))
			issue = {
			'name': tag,
			'description': ''.join(diff[3:]),
			'file': filename,
			'line': i1,
			'column': 1,
			'end_line': i2,
			}
			self.add_issue(issue)