poetry_core: add helper class

poetry.core.masonry.api is one of the common PEP-517 build backends.

Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/classes/poetry_core.bbclass

@@ -0,0 +1,15 @@
+inherit pip_install_wheel python3native python3-dir setuptools3-base
+
+DEPENDS += "python3 python3-poetry-core-native python3-pip-native"
+
+do_configure () {
+    mkdir -p ${S}/dist
+    cat > ${S}/build-it.py << EOF
+from poetry.core.masonry import api
+api.build_wheel('${S}/dist')
+EOF
+}
+
+do_compile () {
+    ${STAGING_BINDIR_NATIVE}/${PYTHON_PN}-native/${PYTHON_PN} ${S}/build-it.py
+}