oeqa: allow customizing image used by runqemu()

runqemu() takes all parameters for the virtual machine from the
variables of the given recipe. By allowing the caller to provide a
hash with variables that get applied locally, the caller gets more
control.

Here's the intended usage:

   <prepare internal-image in self.resultdir>
   overrides = {
        'DEPLOY_DIR_IMAGE': self.resultdir,
        'IMAGE_LINK_NAME': 'internal-image-%s' % self.image_arch,
   }
   with runqemu('refkit-installer-image', ssh=False,
                 overrides=overrides) as qemu:
       ....

This can be used to replace the image completely with something else
or to copy it before allowing runqemu() to write into it.

Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions