Re: [dpdk-dev] [PATCH v3] build: allow using wildcards to disable drivers

["Richardson, Bruce" <bruce.richardson@intel.com>]

> -----Original Message-----
> From: Robin Jarry <robin.jarry@6wind.com>
> Sent: Friday, January 24, 2020 12:28 PM
> To: Richardson, Bruce <bruce.richardson@intel.com>
> Cc: dev@dpdk.org; thomas@monjalon.net
> Subject: Re: [PATCH v3] build: allow using wildcards to disable drivers
> 
> 2020-01-24, Bruce Richardson:
> > Rather than having to explicitly list each and every driver to disable
> > in a build, we can use a small python script and the python glob
> > library to expand out the wildcards. This means that we can configure
> meson using e.g.
> >
> >     meson -Ddisable_drivers=crypto/*,event/* build
> >
> > to do a build omitting all the crypto and event drivers. Explicitly
> > specified drivers e.g. net/i40e, work as before, and can be mixed with
> > wildcarded drivers as required.
> >
> > Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> [snip]
> > +from os.path import join, relpath, isdir
> 
> As a general rule, it is better to only import one symbol per line. This
> makes subsequent patches easier to read.
> 
> > +if len(sys.argv) != 2:
> > +  print("Usage: {0}
> > +<path-glob>[,<path-glob>[,...]]".format(sys.argv[0]))
> > +  sys.exit(1)
> 
> PEP8 advises to use 4 spaces per indentation level. This is the
> indentation style adopted by all other python scripts in dpdk (see
> doc/guides/contributing/coding_style.rst). Could you fix that?
> 
> > +root = '.'
> > +if 'MESON_SOURCE_ROOT' in os.environ and 'MESON_SUBDIR' in os.environ:
> > +  root = join(os.environ['MESON_SOURCE_ROOT'],
> > +os.environ['MESON_SUBDIR'])
> 
> You can do simpler and shorter:
> 
>   root = join(os.getenv('MESON_SOURCE_ROOT', ''),
>               os.getenv('MESON_SUBDIR', ''), '.')

I think a little shorter again by putting the '.' as the default value for one of the env vars.


> 
> Sorry to pester you with all this, but python code in DPDK really needs
> some loving :-)
> 
> --
> Robin