Re: [PATCH] patman: Fix defaults not propegating to subparsers

[Alper Nebi Yasak <alpernebiyasak@gmail.com>]

On 22/04/2022 19:50, Sean Anderson wrote:
> On python 3.8.10, subparsers are not updated with defaults. I suspect
> this is related to [1]. Fix this by explicitly updating subparsers with
> settings.
> 
> [1] https://github.com/python/cpython/issues/89398
> 
> Fixes: 3145b63513 ("patman: Update defaults in subparsers")
> Signed-off-by: Sean Anderson <sean.anderson@seco.com>
> ---
> 
>  tools/patman/settings.py | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)

Also happens on Python 3.10. I can add the following to ~/.patman:

    [settings]
    ignore_bad_tags: True
    dry_run: True

and they start taking effect only after this patch.

Reviewed-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Tested-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>

> 
> diff --git a/tools/patman/settings.py b/tools/patman/settings.py
> index 7c2b5c196c..658fe12be5 100644
> --- a/tools/patman/settings.py
> +++ b/tools/patman/settings.py
> @@ -246,8 +246,10 @@ def _UpdateDefaults(main_parser, config):
>  
>      # Collect the defaults from each parser
>      defaults = {}
> +    parser_defaults = []
>      for parser in parsers:
>          pdefs = parser.parse_known_args()[0]
> +        parser_defaults.append(pdefs)
>          defaults.update(vars(pdefs))
>  
>      # Go through the settings and collect defaults
> @@ -264,8 +266,10 @@ def _UpdateDefaults(main_parser, config):
>          else:
>              print("WARNING: Unknown setting %s" % name)
>  
> -    # Set all the defaults (this propagates through all subparsers)
> +    # Set all the defaults (this does NOT propagate through all subparsers)

Something like 'Set all the defaults and manually propagate ...' would
be clearer here.

>      main_parser.set_defaults(**defaults)
> +    for parser, pdefs in zip(parsers, parser_defaults):
> +        parser.set_defaults(**{ k: v for k, v in defaults.items() if k in pdefs})

I think this would look better if you extract the dict as a variable.

>  
>  def _ReadAliasFile(fname):
>      """Read in the U-Boot git alias file if it exists.