GHA: fix build problems on Windows

.github/workflows/ci_windows.yml

@@ -10,7 +10,7 @@ env:
 
 jobs:
   test:
-    runs-on: windows-latest
+    runs-on: windows-2016
     strategy:
       matrix:
         config: [ MINGW_64-gcov, MINGW_32, MSVC_64, MSVC_32 ]
@@ -23,6 +23,19 @@ jobs:
           path: C:\projects\nvim-deps
           key: ${{ matrix.config }}-${{ hashFiles('third-party\**') }}
 
+      - uses: actions/setup-python@v2
+        with:
+          pyhon-version: '2.7'
+
+      - uses: actions/setup-python@v2
+        with:
+          pyhon-version: '3.5'
+
+
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '12.x'
+
       - name: Run CI
         run: powershell ci\build.ps1
         env:

ci/build.ps1

@@ -28,27 +28,9 @@ function exitIfFailed() {
   }
 }
 
-# https://github.com/lukesampson/scoop#installation
-$scoop = (New-Object System.Net.WebClient).DownloadString('https://get.scoop.sh')
-& {
-  Set-StrictMode -Off
-  Invoke-Expression $scoop
-}
-
-# scoop install perl@5.30.3.1
-# perl --version
-# cpanm.bat --version
-
 if (-not $NoTests) {
-  scoop install nodejs-lts
   node --version
   npm.cmd --version
-
-  # cpanm.bat -n Neovim::Ext
-  # if ($LastExitCode -ne 0) {
-  #   Get-Content -Path "$env:USERPROFILE\.cpanm\build.log"
-  # }
-  # perl -W -e 'use Neovim::Ext; print $Neovim::Ext::VERSION'; exitIfFailed
 }
 
 if (-Not (Test-Path -PathType container $env:DEPS_BUILD_DIR)) {
@@ -90,14 +72,7 @@ if ($compiler -eq 'MINGW') {
   & C:\msys64\usr\bin\mkdir -p /var/cache/pacman/pkg
 
   # Build third-party dependencies
-  C:\msys64\usr\bin\bash -lc "curl -O http://repo.msys2.org/msys/x86_64/msys2-keyring-r21.b39fb11-1-any.pkg.tar.xz" ; exitIfFailed
-  C:\msys64\usr\bin\bash -lc "curl -O http://repo.msys2.org/msys/x86_64/msys2-keyring-r21.b39fb11-1-any.pkg.tar.xz.sig" ; exitIfFailed
-  C:\msys64\usr\bin\bash -lc "pacman-key --verify msys2-keyring-r21.b39fb11-1-any.pkg.tar.xz.sig" ; exitIfFailed
-  C:\msys64\usr\bin\bash -lc "pacman --verbose --noconfirm -U msys2-keyring-r21.b39fb11-1-any.pkg.tar.xz" ; exitIfFailed
-  # If there are still processes using msys-2.0.dll, after the base system update is finished, it will wait for input from the user.
-  # To prevent this, we will terminate all processes that use msys-2.0.dll.
-  Get-Process | Where-Object { $_.path -like 'C:\msys64*' } | Stop-Process
-  C:\msys64\usr\bin\bash -lc "pacman --verbose --noconfirm -Syu" ; exitIfFailed
+  C:\msys64\usr\bin\bash -lc "pacman --verbose --noconfirm -Su" ; exitIfFailed
   C:\msys64\usr\bin\bash -lc "pacman --verbose --noconfirm --needed -S $mingwPackages" ; exitIfFailed
 }
 elseif ($compiler -eq 'MSVC') {
@@ -113,16 +88,15 @@ elseif ($compiler -eq 'MSVC') {
 if (-not $NoTests) {
   # Setup python (use AppVeyor system python)
 
-  C:\Python27\python.exe -m pip install pynvim ; exitIfFailed
-  C:\Python35\python.exe -m pip install pynvim ; exitIfFailed
+  C:\hostedtoolcache\windows\Python\2.7.18\x64\python.exe -m pip install pynvim ; exitIfFailed
+  C:\hostedtoolcache\windows\Python\3.5.4\x64\python.exe -m pip install pynvim ; exitIfFailed
   # Disambiguate python3
-  move c:\Python35\python.exe c:\Python35\python3.exe
-  $env:PATH = "C:\Python35;C:\Python27;$env:PATH"
+  move C:\hostedtoolcache\windows\Python\3.5.4\x64\python.exe C:\hostedtoolcache\windows\Python\3.5.4\x64\python3.exe
+  $env:PATH = "C:\hostedtoolcache\windows\Python\3.5.4\x64;C:\hostedtoolcache\windows\Python\2.7.18\x64;$env:PATH"
   # Sanity check
   python  -c "import pynvim; print(str(pynvim))" ; exitIfFailed
   python3 -c "import pynvim; print(str(pynvim))" ; exitIfFailed
 
-  $env:PATH = "C:\Ruby24\bin;$env:PATH"
   gem.cmd install --pre neovim
   Get-Command -CommandType Application neovim-ruby-host.bat