[PATCH] prereq-build: require python3-distutils

[Andre Heider]

Hi Hauke,

thanks for merging the patch!

Can we also get this cherry-picked to the 21.02 branch, please?

Jeffery makes some good points as to why here:
https://github.com/openwrt/packages/pull/16304#issuecomment-904097018

I too can see that package backports could get unnecessarily painful in 
the future without this in 21.02.

Thanks,
Andre

On 10/08/2021 12:22, Andre Heider wrote:
> Debian and Ubuntu ship a python3-minimal package which does not include
> the distutils module. This is not supported by upstream and can be
> considered a broken python distribution.
> 
> In practice, many scripts depend on said module, and this is a reoccuring
> pain point for building various OpenWrt packages.
> 
> Require and check for said module, enough time has been wasted on this.
> 
> A list of just the most recent issues:
> https://github.com/openwrt/packages/pull/16304
> https://github.com/openwrt/packages/pull/16027
> https://github.com/openwrt/packages/pull/15443
> https://github.com/openwrt/packages/pull/14394
> https://github.com/openwrt/packages/pull/12909
> https://github.com/openwrt/packages/issues/12443
> https://github.com/openwrt/packages/pull/11035
> https://github.com/openwrt/packages/issues/10993
> 
> Signed-off-by: Andre Heider <a.heider at gmail.com>
> ---
>   include/prereq-build.mk | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/include/prereq-build.mk b/include/prereq-build.mk
> index 8fbf6f22c4..922e7c544b 100644
> --- a/include/prereq-build.mk
> +++ b/include/prereq-build.mk
> @@ -170,6 +170,10 @@ $(eval $(call SetupHostCommand,python3,Please install Python >= 3.6, \
>   	python3.6 -V 2>&1 | grep 'Python 3', \
>   	python3 -V 2>&1 | grep -E 'Python 3\.[6-9]\.?'))
>   
> +$(eval $(call TestHostCommand,python3-distutils, \
> +	Please install the Python3 distutils module, \
> +	$(STAGING_DIR_HOST)/bin/python3 -c 'import distutils'))
> +
>   $(eval $(call SetupHostCommand,git,Please install Git (git-core) >= 1.7.12.2, \
>   	git --exec-path | xargs -I % -- grep -q -- --recursive %/git-submodule))
>   
>