Wrong indentation in generated Python code

[ligurio]

Steps to reproduce:

• git clone https://github.com/renatahodovan/grammarinator, f85b80c
• cd grammarinator && pip3 install .
• mkdir lua-examples lua-fuzzer
• curl -O https://raw.githubusercontent.com/antlr/grammars-v4/master/lua/Lua.g4
• grammarinator-process Lua.g4 -o lua-fuzzer/ --pep8 -v
• grammarinator-generate LuaGenerator.LuaGenerator -r chunk -d 20 -o lua-examples/test_%d.lua -n 100 -s grammarinator.runtime.simple_space_serializer --sys-path lua-fuzzer/

Syntax error in the generated file:

Traceback (most recent call last):
  File "/home/sergeyb/.local/bin/grammarinator-generate", line 8, in <module>
    sys.exit(execute())
  File "/home/sergeyb/.local/lib/python3.8/site-packages/grammarinator/generate.py", line 294, in execute
    with Generator(generator=args.generator, rule=args.rule, out_format=args.out,
  File "/home/sergeyb/.local/lib/python3.8/site-packages/grammarinator/generate.py", line 72, in __init__
    self.generator_cls = import_object(generator) if generator else None
  File "/home/sergeyb/.local/lib/python3.8/site-packages/inators/imp.py", line 24, in import_object
    return getattr(importlib.import_module('.'.join(steps[0:-1])), steps[-1])
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 844, in exec_module
  File "<frozen importlib._bootstrap_external>", line 981, in get_code
  File "<frozen importlib._bootstrap_external>", line 911, in source_to_code
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/sergeyb/sources/MRG/tarantool/grammarinator/lua-fuzzer/LuaGenerator.py", line 988
    elif choice == 1:
    ^
SyntaxError: invalid syntax

Seems indentation is wrong and patch below fixes a problem:

--- lua-fuzzer/LuaGenerator.py.orig     2022-07-04 15:52:37.284564569 +0300
+++ lua-fuzzer/LuaGenerator.py  2022-07-04 15:52:56.883836234 +0300
@@ -985,7 +985,8 @@
         choice = self._model.choice(current, 0, [0 if [
                                     0, 0, 0, 0][i] > self._max_depth else w for i, w in enumerate([1, 1, 1, 1])])
         if choice == 0:
-            elif choice == 1:
+            pass
+        elif choice == 1:
             UnlexerRule(src='[', parent=current)
             if self._max_depth >= 0:
                 for _ in self._model.quantify(current, 0, min=0, max=inf):

[renatahodovan]

@ligurio Thanks for the report! It pointed out a real issue indeed which is hopefully fixed now. Please don't hesitate to reopen this ticket if the the issue still persist for you.

[ligurio]

Fix confirmed on version 19.3.post98+gf38ffe5. Thanks a lot for a quick response!