utils: flesh out the experimental SDK and prepare to package

Adjust the build of the experimental SDK to build the overlays and the
string processing library. Additionally adjust the installer build to
allow us to package and distribute the static build of the runtime.

Author: compnerd

utils/build.ps1

@@ -643,6 +643,8 @@ enum Project {
   ClangRuntime
   SwiftInspect
   ExperimentalRuntime
+  ExperimentalOverlay
+  ExperimentalStringProcessing
   StaticFoundation
 }
 
@@ -2279,6 +2281,38 @@ function Build-ExperimentalRuntime {
         dispatch_DIR = (Get-ProjectCMakeModules $Platform Dispatch);
         SwiftCore_ENABLE_CONCURRENCY = "YES";
       }
+
+    Build-CMakeProject `
+      -Src $SourceCache\swift\Runtimes\Overlay `
+      -Bin (Get-ProjectBinaryCache $Platform ExperimentalOverlay) `
+      -InstallTo "$(Get-SwiftSDK $Platform.OS -Identifier "$($Platform.OS)Experimental")\usr" `
+      -Platform $Platform `
+      -UseBuiltCompilers C,CXX,Swift `
+      -UseGNUDriver `
+      -Defines @{
+        BUILD_SHARED_LIBS = if ($Static) { "NO" } else { "YES" };
+        CMAKE_FIND_PACKAGE_PREFER_CONFIG = "YES";
+        CMAKE_Swift_COMPILER_TARGET = (Get-ModuleTriple $Platform);
+        CMAKE_Swift_COMPILER_WORKS = "YES";
+        CMAKE_STATIC_LIBRARY_PREFIX_Swift = "lib";
+        CMAKE_SYSTEM_NAME = $Platform.OS.ToString();
+      }
+
+    Build-CMakeProject `
+      -Src $SourceCache\swift\Runtimes\Supplemental\StringProcessing `
+      -Bin (Get-ProjectBinaryCache $Platform ExperimentalStringProcessing) `
+      -InstallTo "$(Get-SwiftSDK $Platform.OS -Identifier "$($Platform.OS)Experimental")\usr" `
+      -Platform $Platform `
+      -UseBuiltCompilers C,CXX,Swift `
+      -UseGNUDriver `
+      -Defines @{
+        BUILD_SHARED_LIBS = if ($Static) { "NO" } else { "YES" };
+        CMAKE_FIND_PACKAGE_PREFER_CONFIG = "YES";
+        CMAKE_Swift_COMPILER_TARGET = (Get-ModuleTriple $Platform);
+        CMAKE_Swift_COMPILER_WORKS = "YES";
+        CMAKE_STATIC_LIBRARY_PREFIX_Swift = "lib";
+        CMAKE_SYSTEM_NAME = $Platform.OS.ToString();
+      }
   }
 }
 
@@ -3131,6 +3165,7 @@ function Build-Installer([Hashtable] $Platform) {
   $Properties = @{
     BundleFlavor = "offline";
     ImageRoot = "$(Get-InstallDir $Platform)\";
+    IncludeExperimentalSDK = "True";
     INCLUDE_SWIFT_DOCC = $INCLUDE_SWIFT_DOCC;
     SWIFT_DOCC_BUILD = "$(Get-ProjectBinaryCache $HostPlatform DocC)\release";
     SWIFT_DOCC_RENDER_ARTIFACT_ROOT = "${SourceCache}\swift-docc-render-artifact";
@@ -3225,6 +3260,11 @@ if (-not $SkipBuild) {
       Move-Item $_.FullName "$(Get-SwiftSDK Windows)\usr\lib\swift\windows\$($Platform.Architecture.LLVMName)\" | Out-Null
     }
 
+    Get-ChildItem "$(Get-SwiftSDK Windows -Identifier WindowsExperimental)\usr\lib\swift_static\windows" -Filter "*.lib" -File -ErrorAction Ignore | ForEach-Object {
+      Write-Host -BackgroundColor DarkRed -ForegroundColor White "$($_.FullName) is not nested in an architecture directory"
+      Move-Item $_.FullName "$(Get-SwiftSDK Windows -Identifier WindowsExperimental)\usr\lib\swift_static\windows\$($Platform.Architecture.LLVMName)\" | Out-Null
+    }
+
     Copy-Directory "$(Get-SwiftSDK Windows)\usr\bin" "$([IO.Path]::Combine((Get-InstallDir $Platform), "Runtimes", $ProductVersion, "usr"))"
   }
 
@@ -3241,6 +3281,11 @@ if (-not $SkipBuild) {
         Write-Host -BackgroundColor DarkRed -ForegroundColor White "$($_.FullName) is not nested in an architecture directory"
         Move-Item $_.FullName "$(Get-SwiftSDK Android)\usr\lib\swift\android\$($Platform.Architecture.LLVMName)\" | Out-Null
       }
+
+      Get-ChildItem "$(Get-SwiftSDK Android -Identifier AndroidExperimental)\usr\lib\swift_static\android" -File | Where-Object { $_.Name -match "*.a$|*.so$" } | ForEach-Object {
+        Write-Host -BackgroundColor DarkRed -ForegroundColor White "$($_.FullName) is not nested in an architecture directory"
+        Move-Item $_.FullName "$(Get-SwiftSDK Windows -Identifier WindowsExperimental)\usr\lib\swift_static\windows\$($Platform.Architecture.LLVMName)\" | Out-Null
+      }
     }
 
     Install-Platform $AndroidSDKPlatforms Android