ci: replace docker-based tests with native nix-shell pytest action

Author: pedrobrantes

.github/workflows/ci.yml

@@ -10,100 +10,17 @@ on:
       - main
 
 jobs:
-  build-docker-image:
-    if: |
-      github.event_name == 'push' || github.event_name == 'pull_request'
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
-    outputs:
-      image_name: ${{ steps.build.outputs.image_name }}
-      build_ran: "true"
-    steps:
-      - name: Check out repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Check for file changes
-        id: check_files
-        run: |
-          MODIFIED_FILES=$(git diff --name-only HEAD^ HEAD | \
-          grep -E 'nix_test_env/Dockerfile')
-          if [ -n "$MODIFIED_FILES" ]; then
-            echo "build_ran=true" >> $GITHUB_OUTPUT
-          else
-            echo "build_ran=false" >> $GITHUB_OUTPUT
-          fi
-
-      - name: Build docker image
-        if: steps.check_files.outputs.build_ran == 'true'
-        id: build
-        run: |
-          IMAGE_NAME="nix-test-env:$(git rev-parse --short HEAD)"
-          docker build -t ${IMAGE_NAME} -f ./nix_test_env/Dockerfile .
-          echo "image_name=${IMAGE_NAME}" >> $GITHUB_OUTPUT
-
-      - name: Log in and push Docker image to GHCR
-        if: steps.check_files.outputs.build_ran == 'true'
-        run: |
-          echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u \
-            ${{ github.actor }} --password-stdin
-          IMAGE_ID="ghcr.io/${{ github.repository }}/nix-test-env"
-          COMMIT_TAG="${IMAGE_ID}:$(git rev-parse --short HEAD)"
-          docker tag ${{ steps.build.outputs.image_name }} $COMMIT_TAG
-          LATEST_TAG="${IMAGE_ID}:latest"
-          docker tag ${{ steps.build.outputs.image_name }} $LATEST_TAG
-          docker push $COMMIT_TAG
-          docker push $LATEST_TAG
-
   tests:
     runs-on: ubuntu-latest
-    if: |
-      (github.event_name == 'push' || github.event_name == 'pull_request') &&
-      (needs.build-docker-image.outputs.build_ran == 'true' ||
-        needs.build-docker-image.outputs.build_ran == '')
     steps:
       - name: Check out repository
         uses: actions/checkout@v4
 
-      - name: Pull image with fallback in GHCR
-        id: docker_pull
-        run: |
-          IMAGE_ID="ghcr.io/${{ github.repository }}/nix-test-env"
-          COMMIT_TAG="${IMAGE_ID}:$(git rev-parse --short HEAD)"
-          LATEST_TAG="${IMAGE_ID}:latest"
-          echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u \
-            ${{ github.actor }} --password-stdin
-          if docker pull $COMMIT_TAG; then
-            echo "Successfully pulled commit-specific image: $COMMIT_TAG"
-            echo "image_to_test=$COMMIT_TAG" >> $GITHUB_OUTPUT
-          else
-            echo "Commit-specific image not found. Falling back to latest."
-            docker pull $LATEST_TAG
-            echo "image_to_test=$LATEST_TAG" >> $GITHUB_OUTPUT
-          fi
-
-      - name: Run container
-        id: container
-        run: |
-          CONTAINER_NAME="nix-test-container"
-          IMAGE_TO_TEST="${{ steps.docker_pull.outputs.image_to_test }}"
-          echo "Running tests on image: $IMAGE_TO_TEST"
-          docker run --name $CONTAINER_NAME \
-            -v ./nix_tests:/app/tests -d \
-            $IMAGE_TO_TEST tail -f /dev/null
-          echo "container_name=$CONTAINER_NAME" >> $GITHUB_OUTPUT
+      - name: Install Nix
+        uses: cachix/install-nix-action@v27
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
 
-      - name: Run all tests in container
+      - name: Run Tests (Pytest)
         run: |
-          docker exec ${{ steps.container.outputs.container_name }} bash -c \
-            ". /root/.nix-profile/etc/profile.d/nix.sh;
-            home-manager switch;
-            . /root/.nix-profile/etc/profile.d/hm-session-vars.sh;
-            /root/.config/home-manager/nix_tests/run_all.sh"
-
-      - name: Clean up container
-        if: always()
-        run: docker rm -f ${{ steps.container.outputs.container_name }}
+          nix-shell -p python3Packages.pytest --run "pytest tests/"

tests/env/nix_test_env/Dockerfile

@@ -5,5 +5,3 @@ def test_zoxide_config(home_manager_build):
     bashrc = home_manager_build / "home-files/.bashrc"
     content = bashrc.read_text()
     assert "zoxide init bash" in content
-    # zoxide manages the 'cd' alias internally or via the module, check if 'z' alias is common
-    assert "cd=z" in content