appveyor: Try to execute bundler adjustment script

Suggested by @OwenMcDonnell.

Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

appveyor.yml

@@ -39,6 +39,7 @@ for:
     only:
       - ruby_version: "31-x64"
   install:
+    - ps: .\ruby_install.ps1
     - SET PATH=C:\Ruby%ruby_version%\bin;%PATH%
     - ruby --version
     - gem --version

ruby_install.ps1

@@ -0,0 +1,92 @@
+$rubies = @(
+    @{
+        "version"      = "Ruby 2.6.9-1"
+        "install_path" = "C:\Ruby26"
+        "download_url" = "https://github.com/oneclick/rubyinstaller2/releases/download/RubyInstaller-2.6.9-1/rubyinstaller-2.6.9-1-x86.exe"
+        "devkit_url"   = ""
+        "devkit_paths" = @()
+        "bundlerV2"    = $true
+    }
+    @{
+        "version"      = "Ruby 2.6.9-1 (x64)"
+        "install_path" = "C:\Ruby26-x64"
+        "download_url" = "https://github.com/oneclick/rubyinstaller2/releases/download/RubyInstaller-2.6.9-1/rubyinstaller-2.6.9-1-x64.exe"
+        "devkit_url"   = ""
+        "devkit_paths" = @()
+        "bundlerV2"    = $true
+    }
+    @{
+        "version"      = "Ruby 2.7.8-1"
+        "install_path" = "C:\Ruby27"
+        "download_url" = "https://github.com/oneclick/rubyinstaller2/releases/download/RubyInstaller-2.7.8-1/rubyinstaller-2.7.8-1-x86.exe"
+        "devkit_url"   = ""
+        "devkit_paths" = @()
+        "bundlerV2"    = $true
+    }
+    @{
+        "version"      = "Ruby 2.7.8-1 (x64)"
+        "install_path" = "C:\Ruby27-x64"
+        "download_url" = "https://github.com/oneclick/rubyinstaller2/releases/download/RubyInstaller-2.7.8-1/rubyinstaller-2.7.8-1-x64.exe"
+        "devkit_url"   = ""
+        "devkit_paths" = @()
+        "bundlerV2"    = $true
+    }
+)
+
+function UpdateRubyPath($rubyPath) {
+    $env:path = ($env:path -split ';' | Where-Object { -not $_.contains('\Ruby') }) -join ';'
+    $env:path = "$rubyPath;$env:path"
+}
+
+function Install-Ruby($ruby) {
+    Write-Host "Installing $($ruby.version)" -ForegroundColor Cyan
+
+    # uninstall existing
+    $rubyUninstallPath = "$ruby.install_path\unins000.exe"
+    if ([IO.File]::Exists($rubyUninstallPath)) {
+        Write-Host "  Uninstalling previous Ruby 2.4..." -ForegroundColor Gray
+        "`"$rubyUninstallPath`" /silent" | out-file "$env:temp\uninstall-ruby.cmd" -Encoding ASCII
+        & "$env:temp\uninstall-ruby.cmd"
+        del "$env:temp\uninstall-ruby.cmd"
+        Start-Sleep -s 5
+    }
+
+    if (Test-Path $ruby.install_path) {
+        Write-Host "  Deleting $($ruby.install_path)" -ForegroundColor Gray
+        Remove-Item $ruby.install_path -Force -Recurse
+    }
+
+    $exePath = "$($env:TEMP)\rubyinstaller.exe"
+
+    Write-Host "  Downloading $($ruby.version) from $($ruby.download_url)" -ForegroundColor Gray
+    (New-Object Net.WebClient).DownloadFile($ruby.download_url, $exePath)
+
+    Write-Host "Installing..." -ForegroundColor Gray
+    cmd /c start /wait $exePath /verysilent /allusers /dir="$($ruby.install_path.replace('\', '/'))" /tasks="noassocfiles,nomodpath,noridkinstall"
+    del $exePath
+    Write-Host "Installed" -ForegroundColor Green
+
+    # setup Ruby
+    UpdateRubyPath "$($ruby.install_path)\bin"
+    Write-Host "ruby --version" -ForegroundColor Gray
+    cmd /c ruby --version
+
+    Write-Host "gem --version" -ForegroundColor Gray
+    cmd /c gem --version
+
+    # list installed gems
+    Write-Host "gem list --local" -ForegroundColor Gray
+    cmd /c gem list --local
+
+    # delete temp path
+    if ($tempPath) {
+        Write-Host "  Cleaning up..." -ForegroundColor Gray
+        Remove-Item $tempPath -Force -Recurse
+    }
+
+    Write-Host "  Done!" -ForegroundColor Green
+}
+
+for ($i = 0; $i -lt $rubies.Count; $i++) {
+  Install-Ruby $rubies[$i]
+}