linux-kernel - Re: [PATCH v2 05/13] backports: use BACKPORT

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Date:	Wed, 05 Nov 2014 08:51:45 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
Cc:	backports@...r.kernel.org, linux-kernel@...r.kernel.org,
	yann.morin.1998@...e.fr, mmarek@...e.cz, sassmann@...nic.de,
	"Luis R. Rodriguez" <mcgrof@...e.com>
Subject: Re: [PATCH v2 05/13] backports: use BACKPORT_DIR prefix on kconfig
 sources

On Tue, 2014-11-04 at 19:18 -0800, Luis R. Rodriguez wrote:

> @@ -21,23 +22,53 @@ class ConfigTree(object):
>          yield f
>          for l in open(os.path.join(self.basedir, f), 'r'):
>              m = src_line.match(l)
> -            if m and os.path.exists(os.path.join(self.basedir, m.group('src'))):
> -                for i in self._walk(m.group('src')):
> -                    yield i
> +            if m:
> +                bm = bk_src_line.match(l)
> +                if bm:
> +                    if os.path.exists(os.path.join(self.basedir, bm.group('src'))):
> +                        for i in self._walk(os.path.join(self.basedir, bm.group('src'))):
> +                            yield i
> +                    elif os.path.exists(os.path.join(self.basedir, 'backports/' + bm.group('src'))):
> +                        for i in self._walk(os.path.join(self.basedir, 'backports/' + bm.group('src'))):
> +                            yield i
> +                else:
> +                    if os.path.exists(os.path.join(self.basedir, m.group('src'))):
> +                        for i in self._walk(m.group('src')):
> +                            yield i

Shouldn't this depend on "integrate" rather than on existence?

Ah, this is what you were alluding to in the commit log? The fact that
you hardcode "backports/" into this? IMHO it would make more sense to
pass in the "base" directory (either "backports/" or "") though, instead
of making *that* depend on the existence of the directory as well.

Remember, the existence check here serves to remove includes that cannot
be satisfied; your existence check mixes in the differentiation between
packaged and integrated, which doesn't seem right.

Regardless of whether you make the "backports/" prefix configurable or
not, you should pass it to this library function and use it
unconditionally instead of trying to determine package vs. integrated
from the existence of directories.

 
>      def _prune_sources(self, f, ignore):
>          for nf in self._walk(f):
>              out = ''
>              for l in open(os.path.join(self.basedir, nf), 'r'):
> -                m = src_line.match(l)
> -                if not m:
> -                    out += l
> -                    continue
> -                src = m.group('src')
> -                if src in ignore or os.path.exists(os.path.join(self.basedir, src)):
> -                    out += l
> +                bm = bk_src_line.match(l)
> +                if bm:
> +                    bp_src = bm.group('src')
> +                    if bp_src in ignore or \
> +                       os.path.exists(os.path.join(self.basedir, bp_src)) or \
> +                       os.path.exists(os.path.join(self.basedir, 'backports/' + bp_src)):

same here.

johannes

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