Appveyor: Install DMD compiler and dub packages

[skip ci]

.appveyor.yml

@@ -105,6 +105,21 @@ install:
   - cmd: if %compiler%==cygwin ( set WRAPPER=ci\run-in-cygwin.bat )
   - cmd: if %compiler%==cygwin ( %WRAPPER% which %PYTHON% ) else ( where %PYTHON% )
 
+  # Setup D compiler and dub packages
+  - ps: |
+        If($Env:compiler.StartsWith('msvc') -and $Env:backend -eq 'ninja') {
+          & .\ci\install-dmd.ps1
+          $arch = 'x86_mscoff'
+          If($Env:arch -eq 'x64') {
+            $arch = 'x86_64'
+          }
+          & dub fetch urld
+          & dub build urld --compiler=dmd --arch=$arch
+          & dub fetch dubtestproject
+          & dub build dubtestproject:test1 --compiler=dmd --arch=$arch
+          & dub build dubtestproject:test2 --compiler=dmd --arch=$arch
+        }
+
   # pkg-config is needed for the pkg-config tests on msvc
   - ps: |
         If($Env:compiler.StartsWith('msvc')) {

ci/install-dmd.ps1

@@ -0,0 +1,71 @@
+param (
+    [string]$Version = $null
+)
+Set-StrictMode -Version latest
+$ErrorActionPreference = "Stop"
+$ProgressPreference = "SilentlyContinue"
+
+# default installation directory
+$dmd_install = "C:\D"
+$dmd_version_file = "C:\cache\DMD_LATEST"
+
+#echo "Fetching latest DMD version..."
+if (!$Version) {
+    $dmd_latest_url = "http://downloads.dlang.org/releases/LATEST"
+    $retries = 10
+    for ($i = 1; $i -le $retries; $i++) {
+        try {
+            [system.io.directory]::CreateDirectory((Split-Path -parent $dmd_version_file)) > $null
+            Invoke-WebRequest -URI $dmd_latest_url -OutFile $dmd_version_file
+            break
+        } catch [net.WebException] {
+            if ($i -eq $retries) {
+                break
+            }
+            $backoff = (10 * $i) # backoff 10s, 20s, 30s...
+            echo ('{0}: {1}' -f $dmd_latest_url, $_.Exception.Message)
+            echo ('Retrying in {0}s...' -f $backoff)
+            Start-Sleep -m ($backoff * 1000)
+        } catch {
+            throw
+        }
+    }
+    if (Test-Path $dmd_version_file) {
+        $dmd_version = Get-Content -Path $dmd_version_file
+    } else {
+        throw "Failed to resolve latest DMD version"
+    }
+} else {
+    $dmd_version = $Version
+}
+$dmd_url = "http://downloads.dlang.org/releases/2.x/$dmd_version/dmd.$dmd_version.windows.zip"
+$dmd_filename = [System.IO.Path]::GetFileName($dmd_url)
+$dmd_archive = Join-Path ($env:temp) $dmd_filename
+
+#echo "Downloading $dmd_filename..."
+$retries = 10
+for ($i = 1; $i -le $retries; $i++) {
+    try {
+        (New-Object net.webclient).DownloadFile($dmd_url, $dmd_archive)
+        break
+    } catch [net.WebException] {
+        if ($i -eq $retries) {
+            throw # fail on last retry
+        }
+        $backoff = (10 * $i) # backoff 10s, 20s, 30s...
+        echo ('{0}: {1}' -f $dmd_url, $_.Exception.Message)
+        echo ('Retrying in {0}s...' -f $backoff)
+        Start-Sleep -m ($backoff * 1000)
+    }
+}
+
+#echo "Extracting $dmd_filename..."
+Expand-Archive $dmd_archive -Force -DestinationPath $dmd_install
+
+# add to environment path
+#echo "Installing DMD..."
+$dmd_bin = Join-Path $dmd_install "dmd2\windows\bin"
+$Env:Path = $Env:Path + ";" + $dmd_bin
+
+#echo "Testing DMD..."
+& dmd.exe --version 2>&1>$null