Set a build directory for cmake

Author: mdpiper

.github/workflows/test.yml

@@ -2,11 +2,13 @@ name: Build/Test
 
 on: [push, pull_request]
 
+env:
+  BUILD_DIR: _build
+
 jobs:
   build-test-unix:
     if:
-      github.event_name == 'push' || github.event.pull_request.head.repo.full_name !=
-      github.repository
+      github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
 
     runs-on: ${{ matrix.os }}
 
@@ -25,7 +27,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: mamba-org/setup-micromamba@v1
+      - uses: mamba-org/setup-micromamba@v2
         with:
           micromamba-version: latest
           environment-name: testing
@@ -35,19 +37,14 @@ jobs:
             fortran-compiler
             bmi-fortran
 
-      - name: Make CMake build directory
-        run: cmake -E make_directory build
-
-      - name: Configure CMake
-        working-directory: ${{ github.workspace }}/build
+      - name: Configure project
         run: |
-          cmake $GITHUB_WORKSPACE \
+          cmake $GITHUB_WORKSPACE -B ${{ env.BUILD_DIR }} \
             -DCMAKE_BUILD_TYPE=${{ matrix.build-type }} \
             -DCMAKE_INSTALL_PREFIX=$CONDA_PREFIX
 
-      - name: Build
-        working-directory: ${{ github.workspace }}/build
-        run: cmake --build . --target install --config ${{ matrix.build-type }}
+      - name: Build and install project
+        run: cmake --build ${{ env.BUILD_DIR }} --target install --config ${{ matrix.build-type }}
 
       - name: Test for installed files
         run: |
@@ -58,9 +55,8 @@ jobs:
           test -f $CONDA_PREFIX/include/bmiheatf.mod
           test -f $CONDA_PREFIX/lib/pkgconfig/bmiheatf.pc
 
-      - name: Run CTest
-        working-directory: ${{ github.workspace }}/build
-        run: ctest -C ${{ matrix.build-type }} --output-on-failure
+      - name: Run project tests
+        run: ctest --test-dir ${{ env.BUILD_DIR }} -C ${{ matrix.build-type }} --output-on-failure
 
       - name: Memcheck
         if: matrix.os == 'ubuntu-latest'
@@ -78,8 +74,7 @@ jobs:
 
   build-test-windows:
     if:
-      github.event_name == 'push' || github.event.pull_request.head.repo.full_name !=
-      github.repository
+      github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
 
     runs-on: windows-latest