Port to Powershell and RTools

Author: matthew-brett

.github/workflows/build.yml

@@ -1,9 +1,5 @@
 name: Windows build
 
-defaults:
-  run:
-    shell: bash
-
 on:
   push:
     branches: [ master ]
@@ -13,6 +9,9 @@ on:
 env:
   OPENBLAS_COMMIT: "bfd9c1b58cd3"
   OPENBLAS_ROOT: "c:\\opt"
+  # Preserve working directory for calls into bash
+  CHERE_INVOKING: "yes"
+  BASH_PATH: "c:\\rtools40\\usr\\bin\\bash"
 
 jobs:
   build:
@@ -32,46 +31,40 @@ jobs:
       - name: install-rtools
         run: |
           choco install rtools --no-progress
-      - name: show-gfortran
-        run: |
-          gcc --version
-          gfortran --version
 
       - name: Set env variables
         run: |
-          BITS=${{ matrix.BUILD_BITS }}
-          echo "BUILD_BITS=$BITS" >> $GITHUB_ENV;
+          $BITS = ${{ matrix.BUILD_BITS }}
+          echo "BUILD_BITS=$BITS" >> $GITHUB_ENV
           # For interpretation of MSYSTEM, see:
           # https://sourceforge.net/p/msys2/discussion/general/thread/b7dfdac8/#3939
-          if [ "$BITS" == "32" ]; then
+          if ($BITS" -eq 32 ) {
             echo "PLAT=i686" >> $GITHUB_ENV
             echo "MSYSTEM=MINGW32" >> $GITHUB_ENV
             echo "LDFLAGS='-static -static-libgcc'" >> $GITHUB_ENV
-          else
+          } else {
             echo "PLAT=x86_64" >> $GITHUB_ENV
             echo "MSYSTEM=UCRT64" >> $GITHUB_ENV
             echo "LDFLAGS='-lucrt -static -static-libgcc'" >> $GITHUB_ENV
-          fi
+          }
           echo "START_DIR=$PWD" >> $GITHUB_ENV
-          if [ "${{ matrix.INTERFACE64 }}" == "1" ]; then
+          if ( ${{ matrix.INTERFACE64 }} == 1 ) {
             echo "INTERFACE64=1" >> $GITHUB_ENV
-          fi
-          # Preserve the current working directory in bash call.
-          echo "CHERE_INVOKING='yes'" >> $GITHUB_ENV
+          }
 
       - name: Build
         run: |
           git submodule update --init --recursive
-          /c/rtools40/usr/bin/bash -lc tools/build_openblas.sh
+          & $env:BASH_PATH -lc tools\build_openblas.sh
 
       - name: Test
         run: |
-          tools/build_gfortran.sh
+          & $env:BASH_PATH -lc tools\build_gfortran.sh
           cp test.exe builds
           cp test_dyn.exe builds
-          ./test.exe
-          cp $(cygpath $OPENBLAS_ROOT)/$BITS/bin/*.dll .
-          ./test_dyn.exe
+          .\test.exe
+          cp $OPENBLAS_ROOT\$BITS\bin\*.dll .
+          .\test_dyn.exe
 
       - uses: actions/upload-artifact@v3
         with:
@@ -82,4 +75,4 @@ jobs:
          OPENBLAS_LIBS_STAGING_UPLOAD_TOKEN: ${{ secrets.MULTIBUILD_WHEELS_STAGING_ACCESS }}
         run: |
           pip install -q git+https://github.com/Anaconda-Platform/[email protected]
-          tools/upload_to_anaconda_staging.sh
+          & $env:BASH_PATH -lc tools\upload_to_anaconda_staging.sh