Implement shared API

platformio/shared.py

@@ -0,0 +1,28 @@
+# Copyright (c) 2014-present PlatformIO <contact@platformio.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# pylint: disable=unused-import
+
+from platformio.device.filters.base import DeviceMonitorFilterBase
+from platformio.device.list import list_serial_ports
+from platformio.fs import to_unix_path
+from platformio.platform.base import PlatformBase
+from platformio.project.config import ProjectConfig
+from platformio.project.helpers import load_build_metadata
+from platformio.test.result import TestCase, TestCaseSource, TestStatus
+from platformio.test.runners.base import TestRunnerBase
+from platformio.test.runners.doctest import DoctestTestCaseParser
+from platformio.test.runners.googletest import GoogletestTestRunner
+from platformio.test.runners.unity import UnityTestRunner
+from platformio.util import get_systype