Re: [PATCH 1/2] virFileFindResource: Add support for looking in source tree

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On Mon, Feb 16, 2015 at 14:26:56 +0000, Daniel P. Berrange wrote:
> On Mon, Feb 16, 2015 at 03:11:29PM +0100, Jiri Denemark wrote:
> > Not all file we want to find using virFileFindResource{,Full} are
> > generated when libvirt is built, some of them (such as RNG schemas) are
> > distributed with sources. The current API was not able to find source
> > files if libvirt was built in VPATH.
> > 
> > Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
> > ---
> >  src/Makefile.am                 |  2 ++
> >  src/driver.c                    |  1 +
> >  src/locking/lock_driver_lockd.c |  1 +
> >  src/locking/lock_manager.c      |  1 +
> >  src/remote/remote_driver.c      |  1 +
> >  src/util/virfile.c              | 39 ++++++++++++++++++++++++++++++---------
> >  src/util/virfile.h              |  8 +++++++-
> >  7 files changed, 43 insertions(+), 10 deletions(-)
> > 
> > diff --git a/src/Makefile.am b/src/Makefile.am
> > index b41c6d4..a938d7e 100644
> > --- a/src/Makefile.am
> > +++ b/src/Makefile.am
> > @@ -20,6 +20,7 @@
> >  abs_builddir = $(shell pwd)
> >  abs_topbuilddir = $(shell cd .. && pwd)
> >  abs_srcdir = $(shell cd $(srcdir) && pwd)
> > +abs_topsrcdir = $(shell cd $(srcdir)/.. && pwd)
> >  
> >  # No libraries with the exception of LIBXML should be listed
> >  # here. List them against the individual XXX_la_CFLAGS targets
> > @@ -32,6 +33,7 @@ INCLUDES =	-I../gnulib/lib					\
> >  		-I$(srcdir)/util				\
> >  		-DIN_LIBVIRT					\
> >  		-Dabs_topbuilddir="\"$(abs_topbuilddir)\""	\
> > +		-Dabs_topsrcdir="\"$(abs_topsrcdir)\""		\
> >  		$(GETTEXT_CPPFLAGS)
> >  
> >  AM_CFLAGS =	$(LIBXML_CFLAGS)				\
> > diff --git a/src/driver.c b/src/driver.c
> > index 1be32ef..1271597 100644
> > --- a/src/driver.c
> > +++ b/src/driver.c
> > @@ -57,6 +57,7 @@ virDriverLoadModule(const char *name)
> >                                              "libvirt_driver_",
> >                                              ".so",
> >                                              "src/.libs",
> > +                                            VIR_FILE_FIND_RESOURCE_VPATH_BUILD,
> 
> Instead of adding yet another parameter, why don't we just change the
> calling convention of virFileFindResource so that instead of assuming
> abs_topbuilddir we just make the caller prepend the builddir.
> 
> eg instead of pasing 'src/.libs' we pass
> 
>     abs_topbuilddir "/src/.libs"
> 
> letting the compiler concatenate these.  The enum you define is
> basically doing exactly that but with an extra level of indirection
> which doesn't seem to buy us anything

Yeah, I guess, that would work too, although it will either need one
more allocation or making all calls to the non-Full variant of this API
more complex. But we can live with it since virFileFind* APIs are used
at about 11 places...

Jirka

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