Selective CI basecd on changes to a domain

.github/workflows/pr.yml

@@ -16,31 +16,41 @@ env:
 jobs:
   unit-tests:
     runs-on: ubuntu-latest
+    if: steps.changes.outputs.src == 'true' 
     # One runner for each domain
     strategy:
       matrix:
         include:
         - config: portBLAS
-          options: -DTARGET_DOMAINS=blas -DREF_BLAS_ROOT=${PWD}/lapack/install -DENABLE_PORTBLAS_BACKEND=ON -DENABLE_MKLCPU_BACKEND=OFF -DPORTBLAS_TUNING_TARGET=INTEL_CPU
-          tests: '.*'
+          domain: blas
+          build_options: -DREF_BLAS_ROOT=${PWD}/lapack/install -DENABLE_PORTBLAS_BACKEND=ON -DENABLE_MKLCPU_BACKEND=OFF -DPORTBLAS_TUNING_TARGET=INTEL_CPU
         - config: portFFT
-          options: -DENABLE_PORTFFT_BACKEND=ON -DENABLE_MKLCPU_BACKEND=OFF -DTARGET_DOMAINS=dft -DCMAKE_CXX_FLAGS="-fsycl -fsycl-targets=spir64"
-          tests: 'DFT/CT/.*ComputeTests_in_place_COMPLEX.COMPLEX_SINGLE_in_place_buffer.sizes_8_batches_1*'
+          domain: dft
+          build_options: -DENABLE_PORTFFT_BACKEND=ON -DENABLE_MKLCPU_BACKEND=OFF -DCMAKE_CXX_FLAGS="-fsycl -fsycl-targets=spir64"
+          test_options: -R 'DFT/CT/.*ComputeTests_in_place_COMPLEX.COMPLEX_SINGLE_in_place_buffer.sizes_8_batches_1*'
         - config: MKL BLAS
-          options: -DTARGET_DOMAINS=blas -DREF_BLAS_ROOT=${PWD}/lapack/install
-          tests: '.*'
+          domain: blas
+          build_options: -DREF_BLAS_ROOT=${PWD}/lapack/install
         - config: MKL DFT
-          options: -DTARGET_DOMAINS=dft
-          tests: '.*'
+          domain: dft
         - config: MKL LAPACK
-          options: -DTARGET_DOMAINS=lapack -DREF_LAPACK_ROOT=${PWD}/lapack/install
-          tests: '.*'
+          domain: lapack
+          build_options: -DREF_LAPACK_ROOT=${PWD}/lapack/install
         - config: MKL RNG
-          options: -DTARGET_DOMAINS=rng
-          tests: '.*'
+          domain: rng
     name: unit tests ${{ matrix.config }} CPU
     steps:
     - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
+    - name: Check for changes to this domain
+      id: changes
+      uses: dorny/paths-filter@v2
+      with:
+        filters: |
+          src:
+            - 'src/${{ matrix.domain}}/**'
+            - 'tests/unit_tests/${{ matrix.domain }}/**'
+            - CMakeLists.txt
+            # - '.github/workflows/**'
     - name: Restore netlib from cache
       id: cache-lapack
       uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
@@ -64,12 +74,13 @@ jobs:
         components: |
           [email protected]
           [email protected]
+
     - name: Configure/Build for a domain
       run: |
         source /opt/intel/oneapi/setvars.sh
-        cmake -DENABLE_MKLGPU_BACKEND=off -DCMAKE_VERBOSE_MAKEFILE=on ${{ matrix.options }} -B build
+        cmake -DTARGET_DOMAINS=${{ matrix.domain }} -DENABLE_MKLGPU_BACKEND=off -DCMAKE_VERBOSE_MAKEFILE=on ${{ matrix.build_options }} -B build
         cmake --build build ${PARALLEL}
     - name: Run tests
       run: |
         source /opt/intel/oneapi/setvars.sh
-        ctest --test-dir build -R ${{ matrix.tests }}
+        ctest --test-dir build ${{ matrix.test_options }}