Re: [PATCH v6 03/36] qapi-gen: Separate arg-parsing from generation

[Markus Armbruster <armbru@redhat.com>]

John Snow <jsnow@redhat.com> writes:

> This is a minor re-work of the entrypoint script. It isolates a

<pedantic>entrypoint is not a word</>  ;-P

> generate() method from the actual command-line mechanism.
>
> Signed-off-by: John Snow <jsnow@redhat.com>
> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
> Reviewed-by: Cleber Rosa <crosa@redhat.com>
> Tested-by: Cleber Rosa <crosa@redhat.com>
> ---
>  scripts/qapi-gen.py | 89 ++++++++++++++++++++++++++++++++++-----------
>  1 file changed, 67 insertions(+), 22 deletions(-)
>
> diff --git a/scripts/qapi-gen.py b/scripts/qapi-gen.py
> index 541e8c1f55d..054554ed846 100644
> --- a/scripts/qapi-gen.py
> +++ b/scripts/qapi-gen.py
> @@ -1,30 +1,77 @@
>  #!/usr/bin/env python3
> -# QAPI generator
> -#
> +
>  # This work is licensed under the terms of the GNU GPL, version 2 or later.
>  # See the COPYING file in the top-level directory.
>  
> +"""
> +QAPI Generator
> +
> +This is the main entry point for generating C code from the QAPI schema.
> +"""
>  
>  import argparse
>  import re
>  import sys
> +from typing import Optional
>  
>  from qapi.commands import gen_commands
> +from qapi.error import QAPIError
>  from qapi.events import gen_events
>  from qapi.introspect import gen_introspect
> -from qapi.schema import QAPIError, QAPISchema
> +from qapi.schema import QAPISchema
>  from qapi.types import gen_types
>  from qapi.visit import gen_visit
>  
>  
> -def main(argv):
> +def invalid_char(prefix: str) -> Optional[str]:

Naming is hard...  invalid_char() makes sense because it returns the
invalid character.  The name's a tad generic, though.  Would
first_invalid_prefix_char() be easier to understand?

> +    match = re.match(r'([A-Za-z_.-][A-Za-z0-9_.-]*)?', prefix)
> +    if match.end() != len(prefix):
> +        return prefix[match.end()]
> +    return None
[...]