[WIP] CI: test on 32-bit and 64-bit Windows (GNU)

.github/workflows/md5.yml

@@ -8,36 +8,36 @@ on:
   push:
     branches: master
 
+defaults:
+  run:
+    working-directory: md5
+
 env:
   CARGO_INCREMENTAL: 0
   RUSTFLAGS: "-Dwarnings"
 
 jobs:
-  test:
+  linux:
     strategy:
       matrix:
         include:
           # 32-bit Linux/x86
           - target: i686-unknown-linux-gnu
-            platform: ubuntu-latest
             toolchain: 1.41.0 # MSRV
             deps: sudo apt install gcc-multilib
           - target: i686-unknown-linux-gnu
-            platform: ubuntu-latest
             toolchain: stable
             deps: sudo apt install gcc-multilib
 
           # 64-bit Linux/x86_64
           - target: x86_64-unknown-linux-gnu
-            platform: ubuntu-latest
             toolchain: 1.41.0 # MSRV
             deps: true
           - target: x86_64-unknown-linux-gnu
-            platform: ubuntu-latest
             toolchain: stable
             deps: true
 
-    runs-on: ${{ matrix.platform }}
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
       - run: ${{ matrix.deps }}
@@ -47,10 +47,38 @@ jobs:
           toolchain: ${{ matrix.toolchain }}
           target: ${{ matrix.target }}
           override: true
-      # NOTE: using `marcopolo/cargo` fork to support the `working-directory` attribute
-      # See: https://github.com/actions-rs/cargo/pull/59
-      - uses: marcopolo/cargo@master
+      - run: cargo test --target ${{ matrix.target }} --release
+
+  windows:
+    strategy:
+      matrix:
+        include:
+          # 32-bit Windows (GNU)
+          - target: i686-pc-windows-gnu
+            toolchain: 1.41.0 # MSRV
+            msystem: MINGW32
+          - target: i686-pc-windows-gnu
+            toolchain: stable
+            msystem: MINGW32
+
+          # 64-bit Windows (GNU)
+          - target: x86_64-pc-windows-gnu
+            toolchain: 1.41.0 # MSRV
+            msystem: MINGW64
+          - target: x86_64-pc-windows-gnu
+            toolchain: stable
+            msystem: MINGW64
+
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: msys2/setup-msys2@v2
+        with:
+          msystem: ${{ matrix.msystem }}
+      - uses: actions-rs/toolchain@v1
         with:
-          command: test
-          working-directory: md5
-          args: --target ${{ matrix.target }} --release
+          profile: minimal
+          toolchain: ${{ matrix.toolchain }}
+          target: ${{ matrix.target }}
+          override: true
+      - run: cargo test --target ${{ matrix.target }} --release