Backport PR #1334 on branch 0.3.x (Do not clean up resources after execution)

.github/workflows/build.yml

@@ -20,25 +20,40 @@ jobs:
     - name: Base Setup
       uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
 
+    - name: Setup mamba
+      uses: conda-incubator/setup-miniconda@v2
+      with:
+        mamba-version: "*"
+        channels: conda-forge
+
+    - name: Create the conda environment
+      shell: bash -l {0}
+      run: mamba install -q python=${{ matrix.python_version }} pip jupyterlab_pygments==0.1.0 pytest-cov pytest-rerunfailures nodejs==16.19.0 yarn==1 flake8 ipywidgets matplotlib xeus-cling openssl=1.1.1l "traitlets>=5.0.3,<6"
+
     - name: Install Dependencies
+      shell: bash -l {0}
       run: |
         python -m pip install -U jupyterlab~=3.0 jupyter_packaging~=0.10
 
     - name: Install the Voilà Preview JupyterLab extension
+      shell: bash -l {0}
       run: |
         python -m pip install .
 
     - name: Check the extensions are installed
+      shell: bash -l {0}
       run: |
         jupyter nbextension list 2>&1 | grep -ie "voila/extension.*enabled" -
         jupyter labextension list 2>&1 | grep -ie "@voila-dashboards/jupyterlab-preview.*enabled.*ok" -
         jupyter server extension list 2>&1 | grep -ie "voila\.server_extension.*enabled" -
 
     - name: Browser check
+      shell: bash -l {0}
       run: |
         python -m jupyterlab.browser_check
 
     - name: Lint
+      shell: bash -l {0}
       run: |
         jlpm
         jlpm run eslint:check

.github/workflows/main.yml

@@ -32,7 +32,7 @@ jobs:
 
     - name: Create the conda environment
       shell: bash -l {0}
-      run: mamba install -q python=${{ matrix.python_version }} pip jupyterlab_pygments==0.1.0 pytest-cov pytest-rerunfailures nodejs yarn flake8 ipywidgets matplotlib xeus-cling openssl=1.1.1l "traitlets>=5.0.3,<6"
+      run: mamba install -q python=${{ matrix.python_version }} pip jupyterlab_pygments==0.1.0 pytest-cov pytest-rerunfailures nodejs==16.19.0 yarn==1 flake8 ipywidgets matplotlib xeus-cling openssl=1.1.1l "traitlets>=5.0.3,<6"
 
     - name: Install dependencies
       shell: bash -l {0}
@@ -62,7 +62,7 @@ jobs:
 
 
   test-osx:
-    
+
     runs-on: ${{ matrix.os }}
 
     strategy:

voila/notebook_renderer.py

@@ -251,8 +251,6 @@ async def _jinja_notebook_execute(self, nb, kernel_id):
         #  (it seems to be local to our block)
         nb.cells = result.cells
 
-        await self._cleanup_resources()
-
     async def _jinja_cell_generator(self, nb, kernel_id):
         """Generator that will execute a single notebook cell at a time"""
         nb, _ = ClearOutputPreprocessor().preprocess(
@@ -302,12 +300,6 @@ async def _jinja_cell_generator(self, nb, kernel_id):
             finally:
                 yield output_cell
 
-        await self._cleanup_resources()
-
-    async def _cleanup_resources(self):
-        await ensure_async(self.executor.km.cleanup_resources())
-        await ensure_async(self.executor.kc.stop_channels())
-
     async def load_notebook(self, path):
 
         model = await ensure_async(self.contents_manager.get(path=path))