[PATCH v2] oe-selftest.wic: add native sysroot handling

[Trevor Woerner <twoerner@gmail.com>]

The wic test_exclude_path_with_extra_space test succeeds on non-debian AB
workers. Add native sysroot handling so parted from the wic-tools can be
found on debian-based AB workers.

Fixes [YOCTO #15838]

Signed-off-by: Trevor Woerner <twoerner@gmail.com>
---
changes in v2:
- It was previously suggested that the fix might be to copy the PATH
  handling with a try...finally block that other tests perform; that did
  not work on the debian workers either. The proper fix is this one
  which is to explicitly pass the native sysroot path to wic explicitly.
  In fact the wic help message explaining the purpose of the -n argument
  explicitly mentions that it is for passing "the path to the native
  sysroot containing the tools(parted and mtools) to use".
- This was tested by moving my system /usr/sbin/parted out of the path
  so it could not be invoked by this test. A test with parted out of the
  way was done to demonstrate it would fail, then (with parted still out
  of the way) this change was tested to demonstrate it working.
---
 meta/lib/oeqa/selftest/cases/wic.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/lib/oeqa/selftest/cases/wic.py b/meta/lib/oeqa/selftest/cases/wic.py
index d98af8713a19..267c7105c5ec 100644
--- a/meta/lib/oeqa/selftest/cases/wic.py
+++ b/meta/lib/oeqa/selftest/cases/wic.py
@@ -564,8 +564,9 @@ part /mnt --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path bin/whoa
         bb_vars = get_bb_vars(['DEPLOY_DIR_IMAGE', 'MACHINE'], 'core-image-minimal')
         deploy_dir = bb_vars['DEPLOY_DIR_IMAGE']
         machine = bb_vars['MACHINE']
+        nativesysroot = get_bb_var('RECIPE_SYSROOT_NATIVE', 'wic-tools')
         wicout = glob(os.path.join(deploy_dir, "core-image-minimal-%s.rootfs-*.wic" % machine))[0]
-        size_of_root_partition = int(runCmd("wic ls %s" % wicout).output.split('\n')[2].split()[3])
+        size_of_root_partition = int(runCmd("wic ls %s --native-sysroot %s" % (wicout, nativesysroot)).output.split('\n')[2].split()[3])
         self.assertGreater(size_of_root_partition, 500000000)
 
     def test_include_path(self):
-- 
2.44.0.501.g19981daefd7c