Use miniconda setup for multiple versions of Python and pre-release/release NumPy for pip builds

Author: oleksandr-pavlyk

.github/workflows/build_pip.yaml

@@ -12,28 +12,47 @@ env:
 jobs:
   build:
     runs-on: ubuntu-latest
+    defaults:
+      run:
+         shell: bash -el {0}
+
     strategy:
       matrix:
         python: ['3.9', '3.10', '3.11', '3.12']
+        use_pre: ["", "--pre"]
 
     steps:
+      - name: Install jq
+        shell: bash -l {0}
+        run: |
+          sudo apt-get install jq
+
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - name: Set pkgs_dirs
-        run: |
-          echo "pkgs_dirs: [~/.conda/pkgs]" >> ~/.condarc
-
-      - name: Add conda to system path
-        run: echo $CONDA/bin >> $GITHUB_PATH
+      - uses: conda-incubator/setup-miniconda@v3
+        with:
+          use-mamba: true
+          mamba-version: "*"
+          channels: conda-forge
+          activate-environment: test
+          python-version: ${{ matrix.python }}
 
       - name: Install MKL
-        run: conda install -c conda-forge mkl-devel mkl-service --override-channels
+        run: |
+          conda install -c conda-forge mkl-devel mkl-service --override-channels
+          conda activate test
+          python -c "import sys; print(sys.executable)"
+          which python
+          python -c "import mkl; print(mkl.__file__)"
 
       - name: Build conda package
         run: |
+          conda activate test
           pip install --no-cache-dir cython pytest hypothesis
-          pip install --no-cache-dir numpy --pre
-          pip install -e . --no-build-isolation
+          pip install --no-cache-dir numpy ${{ matrix.use_pre }}
+          echo "CONDA_PREFFIX is '${CONDA_PREFIX}'"
+          export MKLROOT=${CONDA_PREFIX}
+          pip install -e . --no-build-isolation --verbose --no-deps
           python -m pytest -v mkl_fft/tests