Workflow for checking dependencies

.github/workflows/dependencies.yml

@@ -0,0 +1,50 @@
+name: Check Dependencies
+
+on:
+  pull_request:  # Temporary
+    branches: [ main ]  # Temporary
+  schedule:
+    - cron:  '0 12 * * FRI'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    steps:
+    - name: Checkout Repository
+      uses: actions/checkout@v2
+
+    - name: Setup Miniconda
+      uses: conda-incubator/[email protected]
+      with:
+        miniforge-version: latest
+        miniforge-variant: Mambaforge
+        activate-environment: test-env
+        environment-file: conda/testing.yml
+        python-version: 3.8
+        auto-activate-base: false
+
+    - name: Download previous dependency file
+      uses: actions/download-artifact@v3
+      with:
+        name: dependencies-artifact
+
+    - name: Rename downloaded file
+      run: |
+        ls
+        mv dependencies.txt previous.txt
+
+    - name: Create Dependency file
+      run: |
+        ls
+        conda list > dependencies.txt
+
+    - name: Upload dependency list
+      uses: actions/upload-artifact@v3
+      with:
+        name: dependencies-artifact
+        path: dependencies.txt
+        retention-days: 14