Re: [bitbake-devel] [PATCH 1/4] fetch2: add curl method to fetch web content

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Thu Mar 5, 2026 at 4:32 PM CET, Pascal Eberhard via B4 Relay via lists.openembedded.org wrote:
> From: Pascal Eberhard <pascal.eberhard@se.com>
>
> curl fetch method is an alternative fetch method for web downloads. It
> is based on curl cmdline tool and provides the same http, https, ftp
> and ftps protocols as wget. It supports some new features as well such
> as hostname resolution by the proxy when using SOCKS5 proxy.
>
> Signed-off-by: Pascal Eberhard <pascal.eberhard@se.com>
> ---

Hi Pascal,

Thanks for your patches.

> +
> +    def _runcurl(self, ud: FetchData, d: DataSmart, command: str, quiet: bool, workdir: str | None = None):

Writing type hint unions with a pipe was added recently to Python, 3.10
if I'm correct [1]. This is above the minimal 3.9 [2] version mandated
for bitbake.

And this is indeed failing on some supported distributions, at least on
Debian 11 and Rocky 9:

Traceback (most recent call last):
  File "/srv/pokybuild/yocto-worker/genericarm64/build/repos/bitbake/bin/bitbake-setup", line 27, in <module>
    import bb.msg
  File "/srv/pokybuild/yocto-worker/genericarm64/build/repos/bitbake/lib/bb/__init__.py", line 155, in <module>
    from bb import fetch2 as fetch
  File "/srv/pokybuild/yocto-worker/genericarm64/build/repos/bitbake/lib/bb/fetch2/__init__.py", line 2107, in <module>
    from . import curl
  File "/srv/pokybuild/yocto-worker/genericarm64/build/repos/bitbake/lib/bb/fetch2/curl.py", line 53, in <module>
    class Curl(Wget):
  File "/srv/pokybuild/yocto-worker/genericarm64/build/repos/bitbake/lib/bb/fetch2/curl.py", line 104, in Curl
    def _runcurl(self, ud: FetchData, d: DataSmart, command: str, quiet: bool, workdir: str | None = None):
TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'

https://autobuilder.yoctoproject.org/valkyrie/#/builders/60/builds/3308
https://autobuilder.yoctoproject.org/valkyrie/#/builders/93/builds/3302

[1]: https://peps.python.org/pep-0604/
[2]: https://git.openembedded.org/bitbake/tree/lib/bb/__init__.py

Thanks,
Mathieu

-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com