Allow customizing the module denylist

pre_commit_hooks/debug_statement_hook.py

@@ -74,8 +74,24 @@ def check_file(filename: str) -> int:
 def main(argv: Sequence[str] | None = None) -> int:
     parser = argparse.ArgumentParser()
     parser.add_argument('filenames', nargs='*', help='Filenames to run')
+    parser.add_argument(
+        '--forbid',
+        type=str, action='append',
+        help='Extra module name(s) to forbid',
+    )
+    parser.add_argument(
+        '--allow',
+        type=str,
+        action='append',
+        help='Extra module name(s) to allow',
+    )
     args = parser.parse_args(argv)
 
+    for name in args.forbid or ():
+        DEBUG_STATEMENTS.add(name)
+    for name in args.allow or ():
+        DEBUG_STATEMENTS.discard(name)
+
     retv = 0
     for filename in args.filenames:
         retv |= check_file(filename)

tests/debug_statement_hook_test.py

@@ -32,6 +32,20 @@ def test_finds_breakpoint():
     assert visitor.breakpoints == [Debug(1, 0, 'breakpoint', 'called')]
 
 
+def test_allow(tmpdir):
+    f_py = tmpdir.join('f.py')
+    f_py.write('import q')
+    ret = main([str(f_py), '--allow', 'q'])
+    assert ret == 0
+
+
+def test_forbid(tmpdir):
+    f_py = tmpdir.join('f.py')
+    f_py.write('import foo')
+    ret = main([str(f_py), '--forbid', 'foo'])
+    assert ret == 1
+
+
 def test_returns_one_for_failing_file(tmpdir):
     f_py = tmpdir.join('f.py')
     f_py.write('def f():\n    import pdb; pdb.set_trace()')