overhaul GHA script

.github/windows.yaml

@@ -1,46 +1,48 @@
-trigger:
-  - main
+name: Windows pyOptSparse Test
 
-pr:
-  - main
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 jobs:
-  - pyoptsparse-test:
+  pyoptsparse-test:
+    name: Test pyOptSparse on Windows
     runs-on: windows-latest
     strategy:
+      fail-fast: false
       matrix:
         numpy_version: ["1.21.6", "1.25.2", "2.0.0"]
     steps:
-    - powershell: Write-Host "##vso[task.prependpath]$env:CONDA\Scripts"
-      displayName: Add conda to PATH
-
-    - script: conda config --add channels conda-forge && conda config --set channel_priority strict
-      displayName: Set channel priority
-
-    - script: conda create --yes --name pyos-build
-      displayName: Create environment
-
-    - script: |
-        call activate pyos-build
-        call conda install -y mamba
-        call mamba env update --file .github/environment.yml
-        call mamba install -y libpgmath
-      displayName: Install mamba and update environment
-
-    - script: |
-        set IPOPT_DIR=%CONDA_PREFIX%\Library
-        set CC=cl
-        set FC=flang
-        set CC_LD=link
-        python -m build -n -x .
-        pip install --no-deps --no-index --find-links dist pyoptsparse
-      displayName: Build and install pyoptsparse
-
-    - script: |
-        call mamba install -y numpy==${{ matrix.numpy_version }}
-      displayName: Install runtime numpy
-
-    - script: |
-        cd tests
-        testflo -n 1 .
-      displayName: Run tests
+      - uses: conda-incubator/setup-miniconda@v3
+        with:
+          auto-update-conda: true
+          python-version: 3.10
+          channels: conda-forge
+          channel-priority: strict
+          activate-environment: pyos-build
+          environment-file: .github/environment.yml
+
+      - name: Install dependencies
+        run: |
+          conda install -y libpgmath
+
+      - name: Build and install pyoptsparse
+        run: |
+          set CC=cl
+          set FC=flang
+          set CC_LD=link
+          python -m build -n -x .
+          pip install --no-deps --no-index --find-links dist pyoptsparse
+
+      - name: Install runtime numpy
+        run: |
+          conda install -y numpy==${{ matrix.numpy_version }}
+
+      - name: Run tests
+        run: |
+          cd tests
+          testflo -n 1 .