build ovs/ovn for windows in ci

.github/workflows/build-ovs-win64.yaml

@@ -0,0 +1,95 @@
+name: Build Win64
+on: workflow_dispatch
+
+jobs:
+  build-ovs-and-ovn:
+    name: Build OVS and OVN
+    runs-on: windows-2019
+    steps:
+      - name: Check out PTHREADS4W
+        run: |
+          mkdir pthreads4w
+          git clone https://git.code.sf.net/p/pthreads4w/code pthreads4w\code
+
+      - name: Check out OVS
+        uses: actions/checkout@v2
+        with:
+          repository: openvswitch/ovs
+          ref: branch-2.16
+          path: ovs
+
+      - name: Check out OVN
+        uses: actions/checkout@v2
+        with:
+          repository: ovn-org/ovn
+          ref: branch-21.06
+          path: ovn
+
+      - name: Apply OVS patches
+        working-directory: ovs
+        run: |
+          Invoke-WebRequest -Uri "https://github.com/kubeovn/ovs/commit/e238bdcb3d062728f6a3929d7e94c52c26b8b3cc.patch" -OutFile ..\ovs-01.patch
+          Invoke-WebRequest -Uri "https://github.com/kubeovn/ovs/commit/77edc343f97427940cd10a19c13f2dd5dc72bd45.patch" -OutFile ..\ovs-02.patch
+          Invoke-WebRequest -Uri "https://github.com/kubeovn/ovs/commit/e4b05cc9cc2836ba18f46d776d7e176038215763.patch" -OutFile ..\ovs-03.patch
+          git apply ..\ovs-01.patch
+          git apply ..\ovs-02.patch
+          git apply ..\ovs-03.patch
+
+      - name: Apply OVN patches
+        working-directory: ovn
+        run: |
+          Invoke-WebRequest -Uri "https://github.com/kubeovn/ovn/commit/72d2a0d17763b0d0b49e50a655473046e117c038.patch" -OutFile ..\ovn-01.patch
+          git apply ..\ovn-01.patch
+
+      - name: Build PTHREADS4W
+        working-directory: pthreads4w\code
+        shell: cmd
+        run: |
+          call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
+          nmake all install
+
+      - name: Install pypiwin32
+        run: python3 -m pip install pypiwin32
+
+      - name: Build OVS and OVN
+        shell: cmd
+        env:
+          MSYS2_PATH_TYPE: inherit
+        run: |
+          SETLOCAL ENABLEDELAYEDEXPANSION
+          SET _p4w_dir=%CD:\=/%/pthreads4w/PTHREADS-BUILT
+          FOR /F "tokens=* USEBACKQ" %%F IN (`C:\msys64\usr\bin\cygpath.exe -u "%CD%\ovs"`) DO (
+            SET _ovs_dir=%%F
+          )
+          FOR /F "tokens=* USEBACKQ" %%F IN (`C:\msys64\usr\bin\cygpath.exe -u "%CD%\ovn"`) DO (
+            SET _ovn_dir=%%F
+          )
+          CALL "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
+          SET _vs_path=
+          FOR %%d IN ("%PATH:;=";"%") DO (
+            echo %%~d | findstr /C:"C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise" > nul && set _vs_path=!_vs_path!;%%~d
+          )
+          SET PATH="%_vs_path%;%PATH%"
+          C:\msys64\usr\bin\bash.exe -lc "pacman -Syu --noconfirm"
+          C:\msys64\usr\bin\bash.exe -lc "pacman -S --noconfirm libtool autoconf automake-wrapper"
+          C:\msys64\usr\bin\bash.exe -lc "rm -f `which link`"
+          C:\msys64\usr\bin\bash.exe -lc "cd '%_ovs_dir%' && ./boot.sh"
+          C:\msys64\usr\bin\bash.exe -lc "cd '%_ovs_dir%' && ./configure CC=./build-aux/cccl LD='`which link`' LIBS='-lws2_32 -lShlwapi -liphlpapi -lwbemuuid -lole32 -loleaut32' --prefix='C:/openvswitch/usr' --localstatedir='C:/openvswitch/var' --sysconfdir='C:/openvswitch/etc' --with-pthread='%_p4w_dir%' --disable-ssl"
+          C:\msys64\usr\bin\bash.exe -lc "cd '%_ovs_dir%' && make -j"
+          C:\msys64\usr\bin\bash.exe -lc "cd '%_ovs_dir%' && make windows_installer"
+          C:\msys64\usr\bin\bash.exe -lc "cd '%_ovn_dir%' && ./boot.sh"
+          C:\msys64\usr\bin\bash.exe -lc "cd '%_ovn_dir%' && ./configure CC=./build-aux/cccl LD='`which link`' LIBS='-lws2_32 -lShlwapi -liphlpapi -lwbemuuid -lole32 -loleaut32' --prefix='C:/ovn/usr' --localstatedir='C:/ovn/var' --sysconfdir='C:/ovn/etc' --with-pthread='%_p4w_dir%' --disable-ssl --with-ovs-source='../ovs' --with-ovs-build='../ovs'"
+          C:\msys64\usr\bin\bash.exe -lc "cd '%_ovn_dir%' && make -j"
+          C:\msys64\usr\bin\bash.exe -lc "cd '%_ovn_dir%' && make install"
+
+      - name: Upload OVS
+        uses: actions/upload-artifact@v2
+        with:
+          name: ovs
+          path: ovs\windows\ovs-windows-installer\bin\x64\Release\OpenvSwitch.msi
+
+      - name: Upload OVN
+        uses: actions/upload-artifact@v2
+        with:
+          name: ovn
+          path: C:\ovn