grep with indentation-based context

Question

Is there a grep tool that shows context based on indentation? For each match, I would like to see all the most recent lines with a lower indent level, but skip all the lines at the same indent level in between. Example:

$ contextgrep rstrip pep8.py
class Checker(object):
    def check_logical(self):
        if self.verbose >= 2:
            print(self.logical_line[:80].rstrip())

Answer 1

Here's a blog post about a literal Haskell implementation of "outline grep".