Fix openvino lin debian ci (#13255)

* Update LD_LIBRARY_PATH for python API tests

* Update LD_LIBRARY_PATH for python API tests

* Remove PYTHONPATH, OV_FRONTEND_PATH
echo PYTHONPATH and LD_LIBRARY_PATH

* Update get environ variables when are not set

* Set OV_FRONTEND_PATH variable

* Add openvino installation path to OV_FRONTEND_PATH

* Add PYTHONPATH to point install tests dir

* Add debug message for PYTHONPATH

* Update LD_LIBRARY_PATH to point openvino wheel
install directory

* Add comments for environ vars for python API tests

* Remove not required paths from linux CI

* Minor comments update

.ci/azure/linux.yml

@@ -4,7 +4,7 @@ trigger:
     - master
     - releases/*
   paths:
-    exclude: 
+    exclude:
     - docs/
     - /**/docs/*
     - /**/*.md
@@ -15,7 +15,7 @@ pr:
     - master
     - releases/*
   paths:
-    exclude: 
+    exclude:
     - docs/
     - /**/docs/*
     - /**/*.md
@@ -265,10 +265,11 @@ jobs:
   - script: |
       export DATA_PATH=$(MODELS_PATH)
       export MODELS_PATH=$(MODELS_PATH)
-      # because of static build libgna is needed for python binary
-      export LD_LIBRARY_PATH=$(REPO_DIR)/temp/gna_03.00.00.1455.2/linux/x64:$(INSTALL_TEST_DIR): \
-        $(INSTALL_DIR)/python/python3.8:$LD_LIBRARY_PATH
+      # because of static build libgna is needed for python binary and mock_py frontend library
+      export LD_LIBRARY_PATH=$(REPO_DIR)/temp/gna_03.00.00.1455.2/linux/x64:$(INSTALL_TEST_DIR):$LD_LIBRARY_PATH
+      # For python imports to import pybind_mock_frontend
       export PYTHONPATH=$(INSTALL_TEST_DIR):$(INSTALL_DIR)/python/python3.8:$PYTHONPATH
+      # For frontend manager to load mock_py library
       export OV_FRONTEND_PATH=$(INSTALL_TEST_DIR)
       python3 -m pytest -sv $(INSTALL_TEST_DIR)/pyopenvino $(PYTHON_STATIC_ARGS) \
         --junitxml=$(INSTALL_TEST_DIR)/TEST-Pyngraph.xml \

.ci/azure/linux_debian.yml

@@ -4,7 +4,7 @@ trigger:
     - master
     - releases/*
   paths:
-    exclude: 
+    exclude:
     - docs/
     - /**/docs/*
     - /**/*.md
@@ -15,7 +15,7 @@ pr:
     - master
     - releases/*
   paths:
-    exclude: 
+    exclude:
     - docs/
     - /**/docs/*
     - /**/*.md
@@ -60,6 +60,7 @@ jobs:
     LAYER_TESTS_DIR: $(INSTALL_TEST_DIR)/layer_tests
     SAMPLES_INSTALL_DIR: /usr/share/openvino/samples
     PYTHON_SAMPLES_INSTALL_DIR: $(INSTALL_DIR)/share/openvino/samples/python
+    PYTHON_WHEEL_INSTALL_DIR: $HOME/.local/lib/python3.8/site-packages
     TMP_DIR: /mnt/tmp
     SHARE_DIR: /mount/cinfsshare/onnxtestdata
     CCACHE_DIR: $(SHARE_DIR)/ccache/master/linux
@@ -241,10 +242,16 @@ jobs:
   - script: |
       export DATA_PATH=$(MODELS_PATH)
       export MODELS_PATH=$(MODELS_PATH)
-      # for libopenvino_template_extension.so
-      export LD_LIBRARY_PATH=$(INSTALL_TEST_DIR):$LD_LIBRARY_PATH
-      export PYTHONPATH=$(INSTALL_TEST_DIR):$(INSTALL_DIR)/python/python3.8:$PYTHONPATH
-      export OV_FRONTEND_PATH=$(INSTALL_TEST_DIR)
+      # Required by python imports to load requires libraries
+      # - tests install dir for mock_py
+      # - OpenVINO wheel installation dir for others frontend required by mock_py (is not part of wheel pkg)
+      export LD_LIBRARY_PATH=$(PYTHON_WHEEL_INSTALL_DIR)/openvino/libs:$(INSTALL_TEST_DIR):$LD_LIBRARY_PATH
+      # For frontend manager to load frontend libraries:
+      # - tests install dir for mock_py
+      # - OpenVINO wheel installation dir for others frontend (not required if this variable is not set)
+      export OV_FRONTEND_PATH=$(PYTHON_WHEEL_INSTALL_DIR)/openvino/libs:$(INSTALL_TEST_DIR)
+      # For python imports to import pybind_mock_frontend
+      export PYTHONPATH=$(INSTALL_TEST_DIR):$PYTHONPATH
       python3 -m pytest -s $(INSTALL_TEST_DIR)/pyopenvino \
         --junitxml=$(INSTALL_TEST_DIR)/TEST-Pyngraph.xml \
         --ignore=$(INSTALL_TEST_DIR)/pyopenvino/tests/test_utils/test_utils.py \

src/bindings/python/tests/test_frontend/test_frontend_extension.py

@@ -32,8 +32,8 @@ def skip_if_frontend_is_disabled(frontend):
     if frontend not in imported_frontends:
         return pytest.mark.skip(
             reason=f"Cannot import frontend {frontend}.  Check paths in:"
-                   f" LD_LIBRARY_PATH={os.environ['LD_LIBRARY_PATH']}"
-                   f", PYTHONPATH={os.environ['PYTHONPATH']}")
+                   f" LD_LIBRARY_PATH={os.environ.get('LD_LIBRARY_PATH','')}"
+                   f", PYTHONPATH={os.environ.get('PYTHONPATH','')}")
 
     return pytest.mark.skipif(frontend not in fem.get_available_front_ends(), reason=f"Frontend {frontend} is disabled")
 

src/bindings/python/tests/test_frontend/test_frontendmanager.py

@@ -32,8 +32,8 @@ except Exception:
 fem = FrontEndManager()
 
 mock_needed = pytest.mark.skipif(not mock_available, reason="Mock frontend is not available. Check paths in:"
-                                                            f" LD_LIBRARY_PATH={os.environ['LD_LIBRARY_PATH']}"
-                                                            f", PYTHONPATH={os.environ['PYTHONPATH']}")
+                                                            f" LD_LIBRARY_PATH={os.environ.get('LD_LIBRARY_PATH','')}"
+                                                            f", PYTHONPATH={os.environ.get('PYTHONPATH','')}")
 
 MOCK_PY_FRONTEND_NAME = "mock_py"