oeqa/selftest/imagefeatures: Use QemuTarget code

Create a runqemu function which uses the QemuTarget() code from
oeqa.targetcontrol to setup the QEMU instance, with all of the added
robustness that that gives us. To do this, a datastore is needed for the
recipe in question (core-image-minimal) so we do the work needed to set
this up. We then use this runqemu function within the imagefeatures
tests instead of a hand-rolled implementation.

We can then use SSHControl to run the SSH tests rather than rolling our
own code to do that as an added bonus.

Fixed and extended by Paul Eggleton <paul.eggleton@linux.intel.com>.

Part of the fix for [YOCTO #7994].

(From OE-Core rev: 7d18d1169204ee80f1c00b35998f10fffaefa107)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/utils/commands.py

@@ -17,6 +17,7 @@ import logging
 from oeqa.utils import CommandError
 from oeqa.utils import ftools
 import re
+import contextlib
 
 class Command(object):
     def __init__(self, command, bg=False, timeout=None, data=None, **options):
@@ -173,3 +174,51 @@ def create_temp_layer(templayerdir, templayername, priority=999, recipepathspec=
         f.write('BBFILE_PATTERN_%s = "^${LAYERDIR}/"\n' % templayername)
         f.write('BBFILE_PRIORITY_%s = "%d"\n' % (templayername, priority))
         f.write('BBFILE_PATTERN_IGNORE_EMPTY_%s = "1"\n' % templayername)
+
+
+@contextlib.contextmanager
+def runqemu(pn, test):
+
+    import bb.tinfoil
+    import bb.build
+
+    tinfoil = bb.tinfoil.Tinfoil()
+    tinfoil.prepare(False)
+    try:
+        tinfoil.logger.setLevel(logging.WARNING)
+        import oeqa.targetcontrol
+        tinfoil.config_data.setVar("TEST_LOG_DIR", "${WORKDIR}/testimage")
+        tinfoil.config_data.setVar("TEST_QEMUBOOT_TIMEOUT", "90")
+        import oe.recipeutils
+        recipefile = oe.recipeutils.pn_to_recipe(tinfoil.cooker, pn)
+        recipedata = oe.recipeutils.parse_recipe(recipefile, [], tinfoil.config_data)
+
+        # The QemuRunner log is saved out, but we need to ensure it is at the right
+        # log level (and then ensure that since it's a child of the BitBake logger,
+        # we disable propagation so we don't then see the log events on the console)
+        logger = logging.getLogger('BitBake.QemuRunner')
+        logger.setLevel(logging.DEBUG)
+        logger.propagate = False
+        logdir = recipedata.getVar("TEST_LOG_DIR", True)
+
+        qemu = oeqa.targetcontrol.QemuTarget(recipedata)
+    finally:
+        # We need to shut down tinfoil early here in case we actually want
+        # to run tinfoil-using utilities with the running QEMU instance.
+        # Luckily QemuTarget doesn't need it after the constructor.
+        tinfoil.shutdown()
+
+    try:
+        qemu.deploy()
+        try:
+            qemu.start()
+        except bb.build.FuncFailed:
+            raise Exception('Failed to start QEMU - see the logs in %s' % logdir)
+
+        yield qemu
+
+    finally:
+        try:
+            qemu.stop()
+        except:
+            pass