MinGW on Actions (#2791)

* MinGW - skip spec in spec/ruby/optional/capi/thread_spec.rb

C-API Thread function rb_thread_call_without_gvl
      -- runs a C function with the global lock unlocked and unlocks IO with the generic RUBY_UBF_IO

stops/freezes spec tests

See https://bugs.ruby-lang.org/issues/16265

* MinGW - skip test test/resolv/test_dns.rb

Test times out in CI (both AppVeyor & Actions), cannot repo locally

* MinGW - skip test test/ruby/test_thread_queue.rb

* Add Actions mingw.yml

.github/workflows/mingw.yml

@@ -0,0 +1,133 @@
+name: Windows
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+    branches:
+      - '*'
+
+# Notes:
+# Action ENV TEMP and TMP are short 8.3 paths, but the long path differs.
+#  Code uses TMPDIR, which is Ruby's 'first' check
+#
+# Console encoding causes issues, see test-all & test-spec steps
+#
+jobs:
+  mingw:
+    runs-on: windows-2019
+    env:
+      MSYSTEM: MINGW64
+      MSYSTEM_PREFIX: /mingw64
+      MSYS2_ARCH: x86_64
+      CHOST: "x86_64-w64-mingw32"
+      CFLAGS:   "-march=x86-64 -mtune=generic -O3 -pipe -fstack-protector-strong"
+      CXXFLAGS: "-march=x86-64 -mtune=generic -O3 -pipe"
+      CPPFLAGS: "-D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048"
+      LDFLAGS:  "-pipe -fstack-protector-strong"
+      UPDATE_UNICODE: "UNICODE_FILES=. UNICODE_PROPERTY_FILES=. UNICODE_AUXILIARY_FILES=. UNICODE_EMOJI_FILES=."
+    strategy:
+      fail-fast: false
+    if: "!contains(github.event.head_commit.message, '[ci skip]')"
+    steps:
+      - name: git config
+        run: |
+          git config --system core.autocrlf false
+          git config --system core.eol lf
+      - name: Checkout repo
+        uses: actions/checkout@v2
+        with:
+          path: src
+      - run: ./src/tool/actions-commit-info.sh
+        shell: bash
+        id: commit_info
+      - name: Set up Ruby & MSYS2
+        uses: MSP-Greg/actions-ruby@master
+        with:
+          ruby-version: 2.6.x
+          base: update
+          mingw: gdbm gmp libffi libyaml openssl ragel readline
+          msys2: automake1.16 bison
+      - name: where check
+        run: |
+          # show where
+          Write-Host
+          $where = 'gcc.exe', 'ragel.exe', 'make.exe', 'bison.exe', 'libcrypto-1_1-x64.dll', 'libssl-1_1-x64.dll'
+          foreach ($e in $where) {
+            $rslt = where.exe $e 2>&1 | Out-String
+            if ($rslt.contains($e)) { Write-Host $rslt }
+            else { Write-Host "`nCan't find $e" }
+          }
+      - name: misc setup, autoreconf
+        run: |
+          mkdir build
+          mkdir install
+          mkdir temp
+          cd src
+          sh -c "autoreconf -fi"
+
+      - name: configure
+        run: |
+          # Actions uses UTF8, causes test failures, similar to normal OS setup
+          $PSDefaultParameterValues['*:Encoding'] = 'utf8'
+          [Console]::OutputEncoding = [System.Text.Encoding]::GetEncoding("IBM437")
+          [Console]::InputEncoding  = [System.Text.Encoding]::GetEncoding("IBM437")
+          cd build
+          $config_args = "--build=$env:CHOST --host=$env:CHOST --target=$env:CHOST"
+          Write-Host $config_args
+          sh -c "../src/configure --disable-install-doc --prefix=/install $config_args"
+          # Write-Host "-------------------------------------- config.log"
+          # Get-Content ./config.log | foreach {Write-Output $_}
+
+      - name: download unicode, gems, etc
+        run: |
+          $jobs = [int]$env:NUMBER_OF_PROCESSORS + 1
+          cd build
+          make -j $jobs update-unicode
+          make -j $jobs update-gems
+
+      - name: make compile
+        timeout-minutes: 20
+        run: |
+          $jobs = [int]$env:NUMBER_OF_PROCESSORS + 1
+          make -C build -j $jobs V=1
+
+      - name: make install
+        run: |
+          # Actions uses UTF8, causes test failures, similar to normal OS setup
+          $PSDefaultParameterValues['*:Encoding'] = 'utf8'
+          [Console]::OutputEncoding = [System.Text.Encoding]::GetEncoding("IBM437")
+          [Console]::InputEncoding  = [System.Text.Encoding]::GetEncoding("IBM437")
+          make -C build DESTDIR=.. install-nodoc
+
+      - name: test
+        timeout-minutes: 5
+        run: |
+          $env:TMPDIR = "$pwd/temp"
+          make -C build test
+
+      - name: test-spec
+        if: success() || failure()
+        timeout-minutes: 10
+        run: |
+          $env:TMPDIR = "$pwd/temp"
+          $env:PATH = "$pwd/install/bin;$env:PATH"
+          # Actions uses UTF8, causes test failures, similar to normal OS setup
+          $PSDefaultParameterValues['*:Encoding'] = 'utf8'
+          [Console]::OutputEncoding = [System.Text.Encoding]::GetEncoding("IBM437")
+          [Console]::InputEncoding  = [System.Text.Encoding]::GetEncoding("IBM437")
+          ruby -v
+          cd src/spec/ruby
+          ruby ../mspec/bin/mspec -j
+
+      - name: test-all
+        if: success() || failure()
+        timeout-minutes: 25
+        run: |
+          $env:TMPDIR = "$pwd/temp"
+          # Actions uses UTF8, causes test failures, similar to normal OS setup
+          $PSDefaultParameterValues['*:Encoding'] = 'utf8'
+          [Console]::OutputEncoding = [System.Text.Encoding]::GetEncoding("IBM437")
+          [Console]::InputEncoding  = [System.Text.Encoding]::GetEncoding("IBM437")
+          $jobs = [int]$env:NUMBER_OF_PROCESSORS
+          make -C build test-all TESTOPTS="--retry --job-status=normal --show-skip --timeout-scale=1.5 --excludes=../src/test/excludes -n !/memory_leak/ -j $jobs"

spec/ruby/optional/capi/thread_spec.rb

@@ -121,23 +121,25 @@ describe "C-API Thread function" do
       thr.value.should be_true
     end
 
-    it "runs a C function with the global lock unlocked and unlocks IO with the generic RUBY_UBF_IO" do
-      thr = Thread.new do
-        @t.rb_thread_call_without_gvl_with_ubf_io
+    guard -> { platform_is :mingw and ruby_version_is ""..."2.7" } do
+      it "runs a C function with the global lock unlocked and unlocks IO with the generic RUBY_UBF_IO" do
+        thr = Thread.new do
+          @t.rb_thread_call_without_gvl_with_ubf_io
+        end
+
+        # Wait until it's blocking...
+        Thread.pass while thr.status and thr.status != "sleep"
+
+        # The thread status is set to sleep by rb_thread_call_without_gvl(),
+        # but the thread might not be in the blocking read(2) yet, so wait a bit.
+        sleep 0.1
+
+        # Wake it up, causing the unblock function to be run.
+        thr.wakeup
+
+        # Make sure it stopped and we got a proper value
+        thr.value.should be_true
       end
-
-      # Wait until it's blocking...
-      Thread.pass while thr.status and thr.status != "sleep"
-
-      # The thread status is set to sleep by rb_thread_call_without_gvl(),
-      # but the thread might not be in the blocking read(2) yet, so wait a bit.
-      sleep 0.1
-
-      # Wake it up, causing the unblock function to be run.
-      thr.wakeup
-
-      # Make sure it stopped and we got a proper value
-      thr.value.should be_true
     end
   end
 end

test/resolv/test_dns.rb

@@ -162,10 +162,19 @@ class TestResolvDNS < Test::Unit::TestCase
     # A race condition here.
     # Another program may use the port.
     # But no way to prevent it.
-    Timeout.timeout(5) do
-      Resolv::DNS.open(:nameserver_port => [[host, port]]) {|dns|
-        assert_equal([], dns.getresources("test-no-server.example.org", Resolv::DNS::Resource::IN::A))
-      }
+    begin
+      Timeout.timeout(5) do
+        Resolv::DNS.open(:nameserver_port => [[host, port]]) {|dns|
+          assert_equal([], dns.getresources("test-no-server.example.org", Resolv::DNS::Resource::IN::A))
+        }
+      end
+    rescue Timeout::Error
+      if RUBY_PLATFORM.match?(/mingw/)
+        # cannot repo locally
+        skip 'Timeout Error on MinGW CI'
+      else
+        raise Timeout::Error
+      end
     end
   end
 

test/ruby/test_thread_queue.rb

@@ -560,6 +560,10 @@ class TestThreadQueue < Test::Unit::TestCase
     if ENV['APPVEYOR'] == 'True' && RUBY_PLATFORM.match?(/mswin/)
       skip 'This test fails too often on AppVeyor vs140'
     end
+    if RUBY_PLATFORM.match?(/mingw/)
+      skip 'This test fails too often on MinGW'
+    end
+
     assert_in_out_err([], <<-INPUT, %w(INT INT exit), [])
       q = Queue.new
       trap(:INT){