Fix caching in actions

.github/workflows/main.yml

@@ -23,12 +23,17 @@ jobs:
       - uses: actions/checkout@v2
       - uses: DeterminateSystems/nix-installer-action@main
       - uses: DeterminateSystems/magic-nix-cache-action@main
-
+      - name: Load dependency cache
+        id: load-cache
+        uses: actions/cache@v2
+        with:
+          path: .venv
+          key: app-${{ runner.os }}-python-${{ env.pythonLocation }}-${{ hashFiles('poetry.lock') }}
       - name: Install dependencies
         run: |
           nix develop -c poetry config virtualenvs.in-project true
           nix develop -c poetry install
-
+        if: steps.load-cache.outputs.cache-hit != 'true'
       - name: Check code style
         if: github.event_name != 'push'
         run: |
@@ -81,12 +86,13 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           PYPI_TOKEN: ${{ secrets.PYPI_TOKEN }}
         run: |
+          source .venv/bin/activate
           git config --global user.name "github-actions"
           git config --global user.email "[email protected]"
           export GH_TOKEN="${GITHUB_TOKEN}"
           export REPOSITORY_USERNAME="__token__"
           export REPOSITORY_PASSWORD="${PYPI_TOKEN}"
-          nix develop -c poetry run python -m semantic_release publish -D commit_author="github-actions <[email protected]>"
+          python -m semantic_release publish -D commit_author="github-actions <[email protected]>"
       - name: Save release commit hash
         id: release-commit-hash
         run: echo "::set-output name=release-commit-hash::$(git rev-parse HEAD)"