separate file change step so Docker pull only happens if files changed

.github/workflows/renderNotebooks.yaml

@@ -65,22 +65,34 @@ jobs:
             fi
 
 
-      - name: Run Docker container to compile assets
+      - name: Check for changed R Markdown files
+        id: check_rmd_files
+        run: |
+          CHANGED_RMD_FILES=$(git diff --name-only HEAD^ HEAD -- '*.Rmd' '*.rmd')
+          if [ -n "$CHANGED_RMD_FILES" ]; then
+            echo "Changed R Markdown files:"
+            echo "$CHANGED_RMD_FILES"
+            echo "::set-output name=has_changed::true"
+            echo "$CHANGED_RMD_FILES" > changed_rmd_files.txt
+          else
+            echo "No changed R Markdown files found."
+            echo "::set-output name=has_changed::false"
+        
+      - name: Run Docker container to compile changed R Markdown files
+        if: steps.check_rmd_files.outputs.has_changed == 'true'
         uses: addnab/docker-run-action@v3
         with:
           image: ${{ steps.meta_rmd.outputs.tags }}
-          options: -v ${{ github.workspace }}:/workspace --rm -u root
+          options: |
+            -v ${{ github.workspace }}:/workspace \
+            -v /tmp/cache:/root/.cache \
+            --rm -u root
           run: |
-            RMD_FILES=$( find /workspace -name "*Rmd"  -o -name "*rmd" )
-            if [ -n "$RMD_FILES" ]; then
-                echo $RMD_FILES
-                for RMD in $RMD_FILES
-                do
-                  Rscript -e 'for (f in commandArgs(TRUE)) if (file.exists(f)) rmarkdown::render(f, output_format = "all")' $RMD
-                done
-            else
-                echo "No R markdown found. Skipping execution."
-            fi
+            CHANGED_RMD_FILES=$(cat changed_rmd_files.txt)
+            for RMD in $CHANGED_RMD_FILES; do
+              Rscript -e 'for (f in commandArgs(TRUE)) if (file.exists(f)) rmarkdown::render(f, output_format = "all")' /workspace/$RMD
+            done
+
 
       - uses: stefanzweifel/git-auto-commit-action@v5
 
@@ -120,23 +132,34 @@ jobs:
 
 
 
-    - name: Run Docker container to compile JupyterNotebook
+    - name: Check for changed Jupyter Notebook files
+      id: check_ipynb_files
+      run: |
+        CHANGED_IPYNB_FILES=$(git diff --name-only HEAD^ HEAD -- '*.ipynb')
+        if [ -n "$CHANGED_IPYNB_FILES" ]; then
+          echo "Changed Jupyter Notebook files:"
+          echo "$CHANGED_IPYNB_FILES"
+          echo "::set-output name=has_changed::true"
+          echo "$CHANGED_IPYNB_FILES" > changed_ipynb_files.txt
+        else
+          echo "No changed Jupyter Notebook files found."
+          echo "::set-output name=has_changed::false"
+      
+    - name: Run Docker container to compile changed Jupyter Notebooks
+      if: steps.check_ipynb_files.outputs.has_changed == 'true'
       uses: addnab/docker-run-action@v3
       with:
         image: ${{ steps.meta_jupyter.outputs.tags }}
-        options: -v ${{ github.workspace }}:/workspace --rm -u root
-
+        options: |
+          -v ${{ github.workspace }}:/workspace \
+          -v /tmp/cache:/root/.cache \
+          --rm -u root
         run: |
-            changed_notebooks=$(git diff --name-only HEAD^ HEAD -- '*.ipynb')
-            if [ -n "$changed_notebooks" ]; then
-              echo "Changed notebooks:"
-              echo "$changed_notebooks"
-              for notebook in $changed_notebooks; do
-                jupyter nbconvert --to html --execute /workspace/$notebook
-                jupyter nbconvert --to markdown --execute /workspace/$notebook
-              done
-            else
-              echo "No changed Jupyter notebooks found. Skipping execution."
-            fi
+          CHANGED_IPYNB_FILES=$(cat changed_ipynb_files.txt)
+          for NOTEBOOK in $CHANGED_IPYNB_FILES; do
+            jupyter nbconvert --to html --execute /workspace/$NOTEBOOK
+            jupyter nbconvert --to markdown --execute /workspace/$NOTEBOOK
+          done
+
 
     - uses: stefanzweifel/git-auto-commit-action@v5