micromamba in CI

.github/workflows/ci.yaml

@@ -32,40 +32,22 @@ jobs:
           fetch-depth: 0 # Fetch all history for all branches and tags.
       - name: Set environment variables
         run: |
-          echo "CONDA_ENV_FILE=ci/environment.yml" >> $GITHUB_ENV
           echo "PYTHON_VERSION=${{ matrix.python-version }}" >> $GITHUB_ENV
-      - name: Cache conda
-        uses: actions/cache@v3
-        with:
-          path: ~/conda_pkgs_dir
-          key:
-            ${{ runner.os }}-conda-py${{ matrix.python-version }}-${{
-            hashFiles('ci/**.yml') }}
-      - uses: conda-incubator/setup-miniconda@v2
-        with:
-          channels: conda-forge
-          channel-priority: strict
-          mamba-version: "*"
-          activate-environment: flox-tests
-          auto-update-conda: false
-          python-version: ${{ matrix.python-version }}
-          use-only-tar-bz2: true
-
-      - name: Install conda dependencies
-        run: |
-          mamba env update -f $CONDA_ENV_FILE
-
       - name: Set up conda environment
-        shell: bash -l {0}
+        uses: mamba-org/provision-with-micromamba@v12
+        with:
+          environment-file: ci/environment.yml
+          environment-name: flox-tests
+          cache-env: true
+          extra-specs: |
+            python="${{ matrix.python-version }}"
+      - name: Install flox
         run: |
           python -m pip install -e .
           conda list
-
       - name: Run Tests
-        shell: bash -l {0}
         run: |
           pytest -n auto --cov=./ --cov-report=xml
-
       - name: Upload code coverage to Codecov
         uses: codecov/[email protected]
         with:
@@ -75,26 +57,57 @@ jobs:
           name: codecov-umbrella
           fail_ci_if_error: false
 
+  optional-deps:
+    name: ${{ matrix.env }}
+    runs-on: ${{ matrix.os }}
+    defaults:
+      run:
+        shell: bash -l {0}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ["ubuntu-latest"]
+        env:
+          [
+            "no-xarray",
+            "no-dask",
+            "minimal-requirements",
+          ]
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0 # Fetch all history for all branches and tags.
+      - name: Set up conda environment
+        uses: mamba-org/provision-with-micromamba@v12
+        with:
+          environment-file: ci/${{ matrix.env }}.yml
+          environment-name: flox-tests
+          cache-env: true
+          extra-specs: |
+            python="${{ matrix.python-version }}"
+      - name: Install flox
+        run: |
+          python -m pip install --no-deps -e .
+      - name: Run tests
+        run: |
+          python -m pytest -n auto
+
   upstream-dev:
     name: upstream-dev
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
     steps:
       - uses: actions/checkout@v3
-      - uses: conda-incubator/setup-miniconda@v2
-        with:
-          channels: conda-forge
-          mamba-version: "*"
-          activate-environment: flox-tests
-          auto-update-conda: false
-          python-version: '3.10'
       - name: Set up conda environment
-        shell: bash -l {0}
-        run: |
-          mamba env update -f ci/upstream-dev-env.yml
-          python -m pip install -e .
-          conda list
+        uses: mamba-org/provision-with-micromamba@v12
+        with:
+          environment-file: ci/upstream-dev-env.yml
+          environment-name: flox-tests
+          extra-specs: |
+            python="3.10"
       - name: Run Tests
-        shell: bash -l {0}
         run: |
           pytest -n 2
 
@@ -110,10 +123,11 @@ jobs:
           repository: 'pydata/xarray'
           fetch-depth: 0 # Fetch all history for all branches and tags.
       - name: Set up conda environment
-        uses: mamba-org/provision-with-micromamba@de032af7fb3675649f3d4bbdda85178ba412ee41
+        uses: mamba-org/provision-with-micromamba@v12
         with:
           environment-file: ci/requirements/environment.yml
           environment-name: xarray-tests
+          cache-env: true
           extra-specs: |
             python="3.10"
       - name: Install xarray