MAINT: Enable cache using cache.yml workflow (#155)

* Enable cache using cache.yml workflow

* clean up publish and ensure error free cache builds

Author: mmcky

.github/workflows/cache.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Build HTML
         shell: bash -l {0}
         run: |
-          jb build lectures --path-output ./
+          jb build lectures --path-output ./ -W --keep-going
       - name: Upload "_build" folder (cache)
         uses: actions/upload-artifact@v2
         with:

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Download "build" folder (cache)
         uses: dawidd6/action-download-artifact@v2
         with:
-          workflow: publish.yml
+          workflow: cache.yml
           branch: main
           name: build-cache
           path: _build

.github/workflows/publish.yml

@@ -36,6 +36,13 @@ jobs:
       - name: Display Pip Versions
         shell: bash -l {0}
         run: pip list
+      # - name: Download "build" folder (cache)
+      #   uses: dawidd6/action-download-artifact@v2
+      #   with:
+      #     workflow: cache.yml
+      #     branch: main
+      #     name: build-cache
+      #     path: _build
       # Build Assets (Download Notebooks and PDF via LaTeX)
       - name: Build PDF from LaTeX
         shell: bash -l {0}
@@ -71,11 +78,6 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: _build/html/
           cname: python.quantecon.org
-      - name: Upload "_build" folder (cache)
-        uses: actions/upload-artifact@v2
-        with:
-          name: build-cache
-          path: _build
       - name: Prepare lecture-python.notebooks sync
         shell: bash -l {0}
         run: |