Merge pull request #1140 from PowerShell/vors/typegen

TypeGen enhancements

build.psm1

@@ -27,6 +27,7 @@ function Start-PSBuild {
         [switch]$Restore,
         [string]$Output,
         [switch]$ResGen,
+        [switch]$TypeGen,
 
         [Parameter(ParameterSetName='CoreCLR')]
         [switch]$Publish,
@@ -195,6 +196,13 @@ function Start-PSBuild {
         }
     }
 
+    # handle TypeGen
+    if ($TypeGen -or -not (Test-Path "$PSScriptRoot/src/Microsoft.PowerShell.CoreCLR.AssemblyLoadContext/CorePsTypeCatalog.cs"))
+    {
+        log "Run TypeGen (generating CorePsTypeCatalog.cs)"
+        Start-TypeGen
+    }
+
     try {
         # Relative paths do not work well if cwd is not changed to project
         Push-Location $Options.Top
@@ -868,6 +876,39 @@ function Send-GitDiffToSd {
     }
 }
 
+function Start-TypeGen
+{
+    [CmdletBinding()]
+    param()
+
+    if (!$IsWindows)
+    {
+        throw "Start-TypeGen is not supported on non-windows. Use src/TypeCatalogGen/build.sh instead"
+    }
+
+    Push-Location "$PSScriptRoot/src/TypeCatalogParser"
+    try
+    {
+        dotnet restore -v Warning
+        dotnet run
+    }
+    finally
+    {
+        Pop-Location
+    }
+
+    Push-Location "$PSScriptRoot/src/TypeCatalogGen"
+    try
+    {
+        dotnet restore -v Warning
+        dotnet run ../Microsoft.PowerShell.CoreCLR.AssemblyLoadContext/CorePsTypeCatalog.cs powershell.inc
+    }
+    finally
+    {
+        Pop-Location
+    }
+}
+
 function Start-ResGen
 {
     [CmdletBinding()]