[OE-core] [PATCH 05/12] volatiles.bbclass: add recipe

[Richard Purdie]

On Thu, 2013-01-24 at 11:31 +0100, Martin Jansa wrote:
> On Thu, Jan 24, 2013 at 04:16:45PM +0800, Qi.Chen at windriver.com wrote:
> > From: Chen Qi <Qi.Chen at windriver.com>
> > 
> > All recipes that need to tweak their directories need to inherit this
> > class and set VOLATILE_DIR, VOLATILE_LINK and VOLATILE_PKGS.
> > 
> > [YOCTO #3406]
> > 
> > Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
> > ---
> >  meta/classes/volatiles.bbclass |   11 +++++++++++
> >  1 file changed, 11 insertions(+)
> >  create mode 100644 meta/classes/volatiles.bbclass
> > 
> > diff --git a/meta/classes/volatiles.bbclass b/meta/classes/volatiles.bbclass
> > new file mode 100644
> > index 0000000..f27e598
> > --- /dev/null
> > +++ b/meta/classes/volatiles.bbclass
> > @@ -0,0 +1,11 @@
> > +# This bbclass is for read-only-rootfs support. All recipes that may tweak their
> > +# own directories in order to run correctly in a read-only rootfs enviroment
> > +# should inherit this class and set VOLATILE_DIR, VOLATILE_LINK, VOLATILE_PKGS.
> > +
> > +# For each package, the net result is a read-only specific conf file generated
> > +# and packaged, which has the name of readonly-${VOLATILESPN}.
> > +
> > +# All these config files are then parsed by populate-volatile.sh to create proper
> > +# directories and links.
> > +
> > +inherit ${@base_contains('DISTRO_FEATURES','sysvinit','volatiles_sysvinit','',d)}
> 
> Does "inherit " work?
> 
> I mean empty inherit when DISTRO_FEATURES don't contain sysvinit? IIRC
> it will fail to parse.

The above syntax does now work. A plain "inherit " won't but something
with an expression in does get handled correctly. It did not used to
work with older bitbake versions.

Cheers,

Richard