Re: [PATCH] decodetree: Open files with encoding='utf-8'

[Daniele Buono <dbuono@linux.vnet.ibm.com>]

I had a similar issue in the past with the acceptance tests.
Some VMs send UTF-8 output in their console and the acceptance test
script would bail out if the locale was not UTF-8.

I sent a patch on the ml but it probably got lost:
https://lists.gnu.org/archive/html/qemu-devel/2020-07/msg06086.html

I can re-spin it if you guys are interested


On 1/8/2021 10:16 AM, Philippe Mathieu-Daudé wrote:
> When decodetree.py was added in commit 568ae7efae7, QEMU was
> using Python 2 which happily reads UTF-8 files in text mode.
> Python 3 requires either UTF-8 locale or an explicit encoding
> passed to open(). Now that Python 3 is required, explicit
> UTF-8 encoding for decodetree sources.
> 
> This fixes:
> 
>    $ /usr/bin/python3 scripts/decodetree.py test.decode
>    Traceback (most recent call last):
>      File "scripts/decodetree.py", line 1397, in <module>
>        main()
>      File "scripts/decodetree.py", line 1308, in main
>        parse_file(f, toppat)
>      File "scripts/decodetree.py", line 994, in parse_file
>        for line in f:
>      File "/usr/lib/python3.6/encodings/ascii.py", line 26, in decode
>        return codecs.ascii_decode(input, self.errors)[0]
>    UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 80:
>    ordinal not in range(128)
> 
> Reported-by: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>   scripts/decodetree.py | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/scripts/decodetree.py b/scripts/decodetree.py
> index 47aa9caf6d1..fa40903cff1 100644
> --- a/scripts/decodetree.py
> +++ b/scripts/decodetree.py
> @@ -1304,7 +1304,7 @@ def main():
> 
>       for filename in args:
>           input_file = filename
> -        f = open(filename, 'r')
> +        f = open(filename, 'r', encoding='utf-8')
>           parse_file(f, toppat)
>           f.close()
>