change ci from conda to mamba

.github/workflows/python-package.yml

@@ -1,4 +1,4 @@
-# This workflow will install Python dependencies using conda, run tests and lint with a variety of Python versions
+# This workflow will install Python dependencies using mamba, run tests and check pre-commit
 
 name: Python package
 
@@ -23,25 +23,38 @@ jobs:
       uses: pierotofy/set-swap-space@master
       with:
         swap-size-gb: 10
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+    - uses: mamba-org/setup-micromamba@v1
       with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
+        environment-name: test-env
+        create-args: >-
+          python=${{ matrix.python-version }}
+    - name: Install dependencies in mamba test-env
       run: |
-        $CONDA/bin/conda env update --file environment.yml --name base
-    - name: Lint with flake8
+        micromamba update -n test-env -f environment.yml
+    # - name: Set up Python ${{ matrix.python-version }}
+    #   uses: actions/setup-python@v3
+    #   with:
+    #     python-version: ${{ matrix.python-version }}
+    # - name: Install dependencies
+    #   run: |
+    #     $CONDA/bin/conda env update --file environment.yml --name base
+    # - name: Lint with flake8
+    #   run: |
+    #     $CONDA/bin/conda install flake8
+    #     # stop the build if there are Python syntax errors or undefined names
+    #     $CONDA/bin/flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+    #     # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+    #     $CONDA/bin/flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+    - name: Run pytest in micromamba environment
       run: |
-        $CONDA/bin/conda install flake8
-        # stop the build if there are Python syntax errors or undefined names
-        $CONDA/bin/flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        $CONDA/bin/flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-    - name: Test with pytest
-      run: |
-        $CONDA/bin/conda install conda-build
-        $CONDA/bin/conda develop ./src
-        $CONDA/bin/conda install pytest
-        $CONDA/bin/pytest --import-mode=importlib .
+        mamba install pytest
+        pytest --import-mode=importlib .
+        shell: micromamba-shell {0}
+    # - name: Test with pytest
+    #   run: |
+    #     $CONDA/bin/conda install conda-build
+    #     $CONDA/bin/conda develop ./src
+    #     $CONDA/bin/conda install pytest
+    #     $CONDA/bin/pytest --import-mode=importlib .
     - name: pre-commit
       uses: pre-commit/action@v3.0.0

environment.yml

@@ -3,7 +3,7 @@ channels:
   - conda-forge
   - defaults
 dependencies:
-  - python=3.10
+  - python>=3.10
   - sphinx
   - ca-certificates
   - openssl