refactoring.py 文件源码

def _change_set_diff(change_set):
    diff = []

    for change in change_set.changes:
        new = change.new_contents
        old = change.old_contents
        if old is None:
            if change.resource.exists():
                old = change.resource.read()
            else:
                old = ''
        result = unified_diff(
            old.splitlines(True), new.splitlines(True),
            'a/' + change.resource.path, 'b/' + change.resource.path
        )
        diff.extend(list(result))
        diff.append('\n')

    return diff