Added conda installation for libcblas on windows (#55)

* attempt to install cblas on the windows runner

* use s-weigand action

* install requirements into the conda virtenv

* added note in README.md

Author: rozyczko

.github/workflows/ci-testing.yaml

@@ -47,6 +47,19 @@ jobs:
         shell: bash
         run: python -m pip install --upgrade pip
 
+      - name: Setup conda
+        uses: s-weigand/setup-conda@v1
+        if: runner.os == 'Windows'
+        with:
+          update-conda: true
+          python-version: ${{ matrix.python-version }}
+          conda-channels: conda-forge
+
+      - name: Install libcblas for pdffit on Windows
+        shell: bash
+        if: runner.os == 'Windows'
+        run: conda install -y -c conda-forge libcblas
+
       - name: Install Python dependencies
         shell: bash
         run: python -m pip install -r requirements.txt

README.md

@@ -33,6 +33,16 @@ Development playground for the new EasyDiffraction API.
   python -c "from pycrysfml import cfml_py_utilities"
   ```
 
+- Install CBLAS library, required for using the Pair Distribution Function feature.
+  This step is required only on Windows.
+  ```bash
+  # Install from the conda-forge channel
+  conda install libcblas -c conda-forge
+
+  # Try to import the module
+  python -c "import diffpy.pdffit2"
+  ```
+
 ## Testing
 
 - Functional tests: