linux-kernel - Re: [ANNOUNCE] Kconfiglib menuconfig implementation

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Date:   Tue, 1 May 2018 21:12:49 +0200
From:   Ulf Magnusson <ulfalizer@...il.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [ANNOUNCE] Kconfiglib menuconfig implementation

On Tue, May 1, 2018 at 7:56 PM, Randy Dunlap <rdunlap@...radead.org> wrote:
> On 04/30/2018 05:57 PM, Ulf Magnusson wrote:
>> Hello,
>>
>> Kconfiglib (https://github.com/ulfalizer/Kconfiglib) now has a
>> terminal menuconfig implementation, implemented in plain curses
>> (which is in the Python standard library).
>>
>> The interface should feel familiar to people used to mconf. It has
>> some features that mconf lacks:
>>
>>   - Seamless resizing
>>
>>   - Unicode support
>>
>>   - Runs on Windows (via 'pip install windows-curses', which uses
>>     PDCurses)
>>
>>   - Improved information displays:
>>
>>     * All expressions are split into readable chunks
>>
>>     * Menus and comments have information displays
>>
>>   - Relatively easy-to-read and easy-to-tweak code.
>>
>>     Kconfiglib automatically invalidates symbols as needed, and
>>     values can never get stale, which helps.
>>
>> Some upcoming features are mouse support and a search feature that
>> can jump directly to the definition of a symbol. The jump-to feature
>> will use a "show-all" mode in case the symbol isn't visible.
>>
>> See the Kconfiglib GitHub page for screenshots. The menuconfig
>> implementation is at
>> https://github.com/ulfalizer/Kconfiglib/blob/master/menuconfig.py.
>> The docstring at the top has some more information.
>
> Hi,
>
> I'm probably missing some python additive (I hope it's that easy), but
> menuconfig.py is not liking the "degree" symbol in drivers/net/can/peak_canfd/Kconfig:
>
> config CAN_PEAK_PCIEFD
>         depends on PCI
>         tristate "PEAK-System PCAN-PCIe FD cards"
>         ---help---
>           This driver adds support for the PEAK-System PCI Express FD
>           CAN-FD cards family.
>           These 1x or 2x CAN-FD channels cards offer CAN 2.0 a/b as well as
>           CAN-FD access to the CAN bus. Besides the nominal bitrate of up to
>           1 Mbit/s, the data bytes of CAN-FD frames can be transmitted with
>           up to 12 Mbit/s. A galvanic isolation of the CAN ports protects the
>           electronics of the card and the respective computer against
>           disturbances of up to 500 Volts. The PCAN-PCI Express FD can be
>           operated with ambient temperatures in a range of -40 to +85 °C.
>
>
> kconfiglib.KconfigSyntaxError:
> Malformed ascii in drivers/net/can/peak_canfd/Kconfig
> Context: b't temperatures in a range of -40 to +85 \xc2\xb0C.\n'
> Problematic data: b'\xc2'
> Reason: ordinal not in range(128)
>
>
> thanks,
> --
> ~Randy

Thanks for trying it out!

You're probably running in the C locale, which implies an ASCII
encoding. That has caused enough trouble that the Python devs decided
to automatically convert it to UTF-8 in Python 3.7:
https://www.python.org/dev/peps/pep-0538/. LC_CTYPE=C.UTF-8 should fix
it.

It's a bit silly to have it crash for something like that though. I
could force UTF-8 instead of respecting the locale (though it feels
neater to respect settings), or tell Python to ignore decoding errors.
Should probably do something at least...

Cheers,
Ulf