Update CI.

Author: maleadt

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
         os: [ubuntu-latest, macOS-latest, windows-latest]
         arch: [x64]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
@@ -40,29 +40,63 @@ jobs:
           file: lcov.info
 
   # development versions, built from source (with assertions enabled)
-  # XXX: skip 1.6 as that requires gfortran, which isn't available on macOS runners
-  # XXX: can we even perform Windows builds like this (i.e., without mingw/cygwin)?
   source_test:
     name: Julia ${{ matrix.branch }} - ${{ matrix.os }} - ${{ matrix.arch }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        branch: ['release-1.7', 'release-1.8', 'release-1.9', 'master']
-        os: [ubuntu-latest, macOS-latest]
+        branch: ['release-1.6', 'release-1.7', 'release-1.8', 'release-1.9', 'master']
+        os: ['ubuntu-latest', 'macOS-latest', 'windows-latest']
         arch: [x64]
+        exclude:
+          # JuliaLang/julia#48081
+          - branch: 'master'
+            os: 'windows-latest'
+            arch: 'x64'
+          # hangs
+          - branch: 'master'
+            os: 'macOS-latest'
+            arch: 'x64'
+          # 1.6 requires gfortran, which isn't available on macOS runners
+          - branch: 'release-1.6'
+            os: 'macOS-latest'
+            arch: 'x64'
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+      - uses: actions/checkout@v3
         with:
           repository: 'JuliaLang/julia'
           ref: ${{ matrix.branch }}
           path: 'julia'
+
+      - name: Install MSYS2
+        uses: msys2/setup-msys2@v2
+        with:
+          path-type: inherit
+          install: mingw-w64-x86_64-gcc cmake diffutils git m4 make patch tar p7zip curl python
+        if: runner.os == 'Windows'
+
+      # compile Julia
       - name: Compile Julia
         run: |
           sed -i.bak 's/exit 2/exit 0/g' julia/deps/tools/jlchecksum
           make -C julia -j $(nproc) FORCE_ASSERTIONS=1 LLVM_ASSERTIONS=1 JULIA_PRECOMPILE=0
           echo $PWD/julia/usr/bin >> $GITHUB_PATH
+        if: runner.os != 'Windows'
+      - name: Compile Julia (in msys2)
+        shell: msys2 {0}
+        run: |
+          echo $PWD
+          sed -i.bak 's/exit 2/exit 0/g' julia/deps/tools/jlchecksum
+          # XXX: workaround for JuliaLang/julia#48081
+          make -C julia/deps install-csl && \
+          cp ${MINGW_PREFIX}/lib/libmsvcrt.a ./julia/usr/lib/libmsvcrt.a && \
+          make -C julia -j $(nproc) FORCE_ASSERTIONS=1 LLVM_ASSERTIONS=1 JULIA_PRECOMPILE=0
+          echo $PWD/julia/usr/bin >> $GITHUB_PATH
+        if: runner.os == 'Windows'
+
+      # set-up packages
       - uses: actions/cache@v1
         env:
           cache-name: cache-artifacts
@@ -74,7 +108,9 @@ jobs:
             ${{ runner.os }}-test-
             ${{ runner.os }}-
       - uses: julia-actions/julia-buildpkg@v1
+
       - uses: julia-actions/julia-runtest@v1
+
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v1
         with: