[hakarrr]

Fixes #22.

Problem

get_is_ignored iterates the ignore rules twice: once to collect string rules and once to collect callable rules. When the caller passes a one-shot iterable such as an iterator, the first pass exhausts it, so callable rules are silently lost and modules that should be ignored get imported:

rules = [lambda name: name.endswith('ignored')]
scan(pkg, ignore=list(rules))  # works
scan(pkg, ignore=iter(rules))  # callable rule lost, sample.ignored is imported

Fix

Materialize the rules into a list once before the two collection passes. Behavior for lists, single strings and single callables is unchanged.

Tests

New regression test test_ignore_module_function_in_iterator passes a callable rule inside iter([...]) and asserts the matched module is not imported. It fails on master and passes with this change. Full test suite: 24 passed.