tweak github actions CI caching

.github/workflows/test.yml

@@ -3,8 +3,7 @@ on: [push]
 
 env:
   MAX_LINE_LENGTH: 110
-  PIPENV_VENV_IN_PROJECT: 1
-  CACHE_PATH: .venv
+  
 jobs:
   lint:
     runs-on: ubuntu-latest
@@ -17,32 +16,18 @@ jobs:
           python-version: 3.8
           architecture: x64
 
-      - name: Install pipenv
-        run: |
-          pip install pipenv
-
-      - uses: actions/cache@v2
-        id: cache-archivebox
-        with:
-          path: ${{ env.CACHE_PATH }}
-          key: ${{ runner.os }}-3.8-pipenv-${{ hashFiles('**/Pipfile') }}
-          restore-keys: |
-            ${{ runner.os }}-3.8-pipenv-
-
-      - name: Install dependencies
-        run: |
-          pipenv install --dev
-
       - name: Lint with flake8
         run: |
+          pip install flake8
           # one pass for show-stopper syntax errors or undefined names
-          pipenv run flake8 archivebox --count --show-source --statistics
+          flake8 archivebox --count --show-source --statistics
           # one pass for small stylistic things
-          pipenv run flake8 archivebox --count --max-line-length="$MAX_LINE_LENGTH" --statistics
+          flake8 archivebox --count --max-line-length="$MAX_LINE_LENGTH" --statistics
 
-      - name: Lint with mypy
-        run: |
-          pipenv run mypy archivebox || true
+      # - name: Lint with mypy
+      #   run: |
+      #     pip install mypy
+      #     mypy archivebox || true
 
   test:
     runs-on: ${{ matrix.os }}
@@ -63,25 +48,22 @@ jobs:
           python-version: ${{ matrix.python }}
           architecture: x64
 
-      - name: Install pipenv
-        run: |
-          pip install pipenv
-
-      - uses: actions/cache@v1
-        id: cache-archivebox
+      - name: Cache virtualenv
+        uses: actions/cache@v2
         with:
-          path: ${{ env.CACHE_PATH }}
-          key: ${{ runner.os }}-${{ matrix.python }}-pipenv-${{ hashFiles('**/Pipfile') }}
+          path: .venv
+          key: ${{ runner.os }}-${{ matrix.python }}-venv-${{ hashFiles('setup.py') }}
           restore-keys: |
-            ${{ runner.os }}-${{ matrix.python }}-pipenv-
+            ${{ runner.os }}-${{ matrix.python }}-venv-
 
       - name: Install dependencies
         run: |
-          pipenv install --dev
+          python3 -m .venv
+          ./.venv/bin/python -m pip install -e '.[dev]'
 
       - name: Test built package with pytest
         run: |
-          pipenv run pytest -s
+          ./.venv/bin/python -m pipenv run pytest -s
 
   docker-test:
     runs-on: ubuntu-latest
@@ -91,6 +73,8 @@ jobs:
         with:
           fetch-depth: 1
 
+      - uses: satackey/action-docker-layer-caching@v0.0.4
+
       - name: Build image
         run: |
           docker build . -t archivebox