meta-zephyr-core: add zephyr-kernel-test-twister.bb

`./scripts/twister --build-only ...` generates artifacts that can be
consumed be `./scripts/twister --test-only ...`.

Signed-off-by: Chase Qi <chase.qi@linaro.org>

meta-zephyr-core/recipes-kernel/zephyr-kernel/files/0001-twister-remove-python3-tabulate-dependence.patch

+From 7d675296e8dab18299ff853afb29e20808115085 Mon Sep 17 00:00:00 2001
+From: Chase Qi <chase.qi@linaro.org>
+Date: Mon, 9 May 2022 18:27:17 +0800
+Subject: [PATCH 1/2] twister: remove python3-tabulate dependence
+
+tabulate module is need by --device-testing option, but not needed by
+--build-only option. Remove the dependence as there is no provider for
+python3-tabulate-native yet.
+
+Upstream status: inappropriate [OE specific]
+
+Signed-off-by: Chase Qi <chase.qi@linaro.org>
+---
+ scripts/pylib/twister/twisterlib.py | 5 -----
+ scripts/twister                     | 5 -----
+ 2 files changed, 10 deletions(-)
+
+diff --git a/scripts/pylib/twister/twisterlib.py b/scripts/pylib/twister/twisterlib.py
+index 7754532411..e8c342df91 100755
+--- a/scripts/pylib/twister/twisterlib.py
++++ b/scripts/pylib/twister/twisterlib.py
+@@ -47,11 +47,6 @@ try:
+ except ImportError:
+     print("Install pyserial python module with pip to use --device-testing option.")
+ 
+-try:
+-    from tabulate import tabulate
+-except ImportError:
+-    print("Install tabulate python module with pip to use --device-testing option.")
+-
+ try:
+     import psutil
+ except ImportError:
+diff --git a/scripts/twister b/scripts/twister
+index 9e041f1f76..f54f67b86c 100755
+--- a/scripts/twister
++++ b/scripts/twister
+@@ -199,11 +199,6 @@ try:
+ except ImportError:
+     print("Install the anytree module to use the --test-tree option")
+ 
+-try:
+-    from tabulate import tabulate
+-except ImportError:
+-    print("Install tabulate python module with pip to use --device-testing option.")
+-
+ sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/pylib/twister"))
+ 
+ from twisterlib import HardwareMap, TestSuite, SizeCalculator, CoverageTool, ExecutionCounter
+-- 
+2.25.1
+

meta-zephyr-core/recipes-kernel/zephyr-kernel/files/0002-twister-set-toolchain-to-ZEPHYR_GCC_VARIANT.patch

+From 4f48eac03ac25a66af25d72e7b88f04d3ddd770d Mon Sep 17 00:00:00 2001
+From: Chase Qi <chase.qi@linaro.org>
+Date: Mon, 9 May 2022 18:31:19 +0800
+Subject: [PATCH 2/2] twister: set toolchain to ZEPHYR_GCC_VARIANT
+
+Set toolchain to ZEPHYR_GCC_VARIANT. Defaults to 'yocto'.
+
+Upstream status: inappropriate [OE specific]
+
+Signed-off-by: Chase Qi <chase.qi@linaro.org>
+---
+ scripts/pylib/twister/twisterlib.py | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/scripts/pylib/twister/twisterlib.py b/scripts/pylib/twister/twisterlib.py
+index e8c342df91..d54d13fdc0 100755
+--- a/scripts/pylib/twister/twisterlib.py
++++ b/scripts/pylib/twister/twisterlib.py
+@@ -3042,6 +3042,8 @@ class TestSuite(DisablePyTestCollectionMixin):
+ 
+     @staticmethod
+     def get_toolchain():
++        return os.getenv("ZEPHYR_GCC_VARIANT", "yocto")
++
+         toolchain_script = Path(ZEPHYR_BASE) / Path('cmake/verify-toolchain.cmake')
+         result = CMake.run_cmake_script([toolchain_script, "FORMAT=json"])
+ 
+-- 
+2.25.1
+

meta-zephyr-core/recipes-kernel/zephyr-kernel/zephyr-kernel-test-twister.bb

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+FILESEXTRAPATHS:prepend := "${THISDIR}/files:"
+SRC_URI:append = " \
+    file://0001-twister-remove-python3-tabulate-dependence.patch \
+    file://0002-twister-set-toolchain-to-ZEPHYR_GCC_VARIANT.patch \
+"
+
+ZEPHYR_INHERIT_CLASSES += "zephyr cmake"
+inherit ${ZEPHYR_INHERIT_CLASSES}
+
+require zephyr-kernel-test.inc
+require zephyr-sample.inc
+
+ZEPHYR_SRC_DIR = "${S}/tests/kernel/pending/"
+OECMAKE_SOURCEPATH = "${ZEPHYR_SRC_DIR}"
+
+DEPENDS += "\
+    python3-pyserial-native \
+    python3-psutil-native \
+    python3-anytree-native \
+    python3-ply-native \
+"
+
+do_compile() {
+    if test -n "${ZEPHYRTESTS}"; then
+        tc_root_options="${@' '.join(['-T tests/kernel/' + i + ' ' for i in d.getVar('ZEPHYRTESTS').split()])}"
+        bbnote "Test case root options: ${tc_root_options}"
+        bbnote "Generating twister-out ..."
+        cd ${S}
+        rm -rf twister-out
+        # Twister runs both 'cmake' and 'cmake --build' itself to configure and
+        # compile test images respectively. All the flags using in cmake.bbclass
+        # should be passed to twister so that tests are configured properly.
+        # References:
+        # Standard target filesystem paths: http://cgit.openembedded.org/openembedded-core/tree/meta/conf/bitbake.conf
+        # cmake.bbclass: http://cgit.openembedded.org/openembedded-core/tree/meta/classes/cmake.bbclass
+        ./scripts/twister \
+            -x=CMAKE_INSTALL_PREFIX:PATH=${prefix} \
+            -x=CMAKE_INSTALL_BINDIR:PATH=${@os.path.relpath(d.getVar('bindir'), d.getVar('prefix') + '/')} \
+            -x=CMAKE_INSTALL_SBINDIR:PATH=${@os.path.relpath(d.getVar('sbindir'), d.getVar('prefix') + '/')} \
+            -x=CMAKE_INSTALL_LIBEXECDIR:PATH=${@os.path.relpath(d.getVar('libexecdir'), d.getVar('prefix') + '/')} \
+            -x=CMAKE_INSTALL_SYSCONFDIR:PATH=${sysconfdir} \
+            -x=CMAKE_INSTALL_SHAREDSTATEDIR:PATH=${@os.path.relpath(d.getVar('sharedstatedir'), d.getVar('prefix') + '/')} \
+            -x=CMAKE_INSTALL_LOCALSTATEDIR:PATH=${localstatedir} \
+            -x=CMAKE_INSTALL_LIBDIR:PATH=${@os.path.relpath(d.getVar('libdir'), d.getVar('prefix') + '/')} \
+            -x=CMAKE_INSTALL_INCLUDEDIR:PATH=${@os.path.relpath(d.getVar('includedir'), d.getVar('prefix') + '/')} \
+            -x=CMAKE_INSTALL_DATAROOTDIR:PATH=${@os.path.relpath(d.getVar('datadir'), d.getVar('prefix') + '/')} \
+            -x=PYTHON_EXECUTABLE:PATH=${PYTHON} \
+            -x=Python_EXECUTABLE:PATH=${PYTHON} \
+            -x=Python3_EXECUTABLE:PATH=${PYTHON} \
+            -x=LIB_SUFFIX=${@d.getVar('baselib').replace('lib', '')} \
+            -x=CMAKE_INSTALL_SO_NO_EXE=0 \
+            -x=CMAKE_TOOLCHAIN_FILE=${WORKDIR}/toolchain.cmake \
+            -x=CMAKE_NO_SYSTEM_FROM_IMPORTED=1 \
+            -x=CMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON \
+            -x=FETCHCONTENT_FULLY_DISCONNECTED=ON \
+            -x=ZEPHYR_BASE=${S} \
+            -x=ZEPHYR_GCC_VARIANT=${ZEPHYR_GCC_VARIANT} \
+            -x=BOARD=${BOARD} \
+            -x=ARCH=${ARCH} \
+            -x=CROSS_COMPILE=${CROSS_COMPILE} \
+            -x=ZEPHYR_SYSROOT=${ZEPHYR_SYSROOT} \
+            -x=ZEPHYR_TOOLCHAIN_VARIANT=${ZEPHYR_GCC_VARIANT} \
+            -x=EXTRA_CPPFLAGS=${CPPFLAGS} \
+            -x=ZEPHYR_MODULES=${ZEPHYR_MODULES} \
+            --force-toolchain \
+            -p ${@d.getVar('MACHINE').replace("-", "_")} \
+            --build-only \
+            ${tc_root_options} \
+            -vvv
+    else
+        bbnote "Do nothing as ZEPHYRTESTS is empty."
+    fi
+}
+
+do_deploy () {
+    if test -n "${ZEPHYRTESTS}"; then
+        # Twister '--test-only' option only needs the below files. Directory
+        # structure must be kept as it is.
+        # - zephyr.elf
+        # - twister.csv
+        twister_out="${S}/twister-out"
+        find ${twister_out}/ \( -type f -o -type l \) -a ! \( -name "zephyr.elf" -o -name "twister.csv" \) -print -delete
+        find ${twister_out}/ -empty -type d -delete
+
+        image_name="twister-out-${MACHINE}.tar.bz2"
+        tar -jcvf ${image_name} -C ${S} twister-out
+        install -D ${image_name} ${DEPLOYDIR}/
+    else
+        bbnote "Do nothing as ZEPHYRTESTS is empty."
+    fi
+}