pixi: Use environment variable to improve genericity

Author: jorisv

.github/workflows/macos-linux-windows-conda.yml

@@ -37,28 +37,22 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, macos-14]
-        environment: [py38-ci, py312-ci, accelerate-ci]
+        environment: [all, all_py39]
         build_type: [Release, Debug]
         cxx_options: ['', '-mavx2']
 
         exclude:
-          - os: ubuntu-latest
-            environment: accelerate-ci
-          - os: macos-latest
-            environment: accelerate-ci
           - os: macos-latest
             cxx_options: '-mavx2'
           - os: macos-14
             cxx_options: '-mavx2'
-          - os: macos-14
-            environment: py312-ci
 
         include:
           - os: windows-latest
-            environment: py312-ci
+            environment: all
             compiler: cl
           - os: windows-latest
-            environment: py312-ci
+            environment: all
             compiler: clang-cl
 
     steps:
@@ -72,23 +66,21 @@ jobs:
         key: ccache-macos-linux-windows-pixi-${{ matrix.os }}-${{ matrix.build_type }}-${{ matrix.cxx_options }}-${{ matrix.environment }}-${{ github.sha }}
         restore-keys: ccache-macos-linux-windows-pixi-${{ matrix.os }}-${{ matrix.build_type }}-${{ matrix.cxx_options }}-${{ matrix.environment }}-
 
-    - uses: prefix-dev/setup-pixi@v0.5.1
+    - uses: prefix-dev/setup-pixi@v0.8.1
       with:
-        pixi-version: v0.18.0
+        pixi-version: v0.31.0
         cache: true
         environments: ${{ matrix.environment }}
+        activate-environment: true
 
     - name: Build EigenPy [MacOS/Linux]
-      shell: pixi run bash -el {0}
       if: contains(matrix.os, 'ubuntu') || contains(matrix.os, 'macos')
       env:
         CMAKE_BUILD_PARALLEL_LEVEL: 4
+        EIGENPY_BUILD_TYPE: ${{ matrix.build_type }}
+        EIGENPY_CXX_FLAGS: ${{ matrix.cxx_options }}
       run: |
-        # We can't setup these variables in env because
-        # conda and pixi activation script can overwrite them
-        export CMAKE_BUILD_TYPE=${{ matrix.build_type }}
-        export CXXFLAGS=${{ matrix.cxx_options }}
-        pixi run -e ${{ matrix.environment }} test
+        pixi run test
 
     - name: Build EigenPy [Windows]
       shell: pixi run bash -el {0}
@@ -98,7 +90,7 @@ jobs:
         CXX: ${{ matrix.compiler }}
         CMAKE_BUILD_PARALLEL_LEVEL: 4
       run: |
-        pixi run -e ${{ matrix.environment }} test
+        pixi run test
 
   check:
     if: always()