[Windows] Run swift-format tests from build.ps1

The basic idea is that we build all libraries for the executable that will be included in the toolchain using CMake. swift-format then has a mode in its Package manifest that allows it to build just the test and test support targets, requiring all search paths to find those libraries to be passed in. We use that to only build swift-format's test using SwiftPM and re-use all the libraries that were already built using CMake.

utils/build-windows-toolchain.bat

@@ -60,7 +60,7 @@ set TMPDIR=%BuildRoot%\tmp
 set NINJA_STATUS=[%%f/%%t][%%p][%%es] 
 
 :: Build the -Test argument, if any, by subtracting skipped tests
-set TestArg=-Test lld,swift,dispatch,foundation,xctest,
+set TestArg=-Test lld,swift,dispatch,foundation,xctest,swift-format,
 for %%I in (%SKIP_TESTS%) do (call set TestArg=%%TestArg:%%I,=%%)
 if "%TestArg:~-1%"=="," (set TestArg=%TestArg:~0,-1%) else (set TestArg= )
 

utils/build.ps1

@@ -1182,7 +1182,7 @@ function Build-CMakeProject {
     }
 
     if ($UseBuiltCompilers.Contains("Swift")) {
-      $env:Path = "$($BuildArch.SDKInstallRoot)\usr\bin;$($BuildArch.BinaryCache)\cmark-gfm-0.29.0.gfm.13\src;$($BuildArch.ToolchainInstallRoot)\usr\bin;${env:Path}"
+      $env:Path = "$($BuildArch.SDKInstallRoot)\usr\bin;$(Get-CMark-BinaryCache($Arch))\src;$($BuildArch.ToolchainInstallRoot)\usr\bin;${env:Path}"
     } elseif ($UsePinnedCompilers.Contains("Swift")) {
       $env:Path = "$(Get-PinnedToolchainRuntime);${env:Path}"
     }
@@ -1326,12 +1326,15 @@ function Build-WiXProject() {
   Invoke-Program $msbuild @MSBuildArgs
 }
 
+function Get-CMark-BinaryCache($Arch) {
+  return "$($Arch.BinaryCache)\cmark-gfm-0.29.0.gfm.13"
+}
 function Build-CMark($Arch) {
   $ArchName = $Arch.LLVMName
 
   Build-CMakeProject `
     -Src $SourceCache\cmark `
-    -Bin "$($Arch.BinaryCache)\cmark-gfm-0.29.0.gfm.13" `
+    -Bin (Get-CMark-BinaryCache($Arch)) `
     -InstallTo "$($Arch.ToolchainInstallRoot)\usr" `
     -Arch $Arch `
     -Defines @{
@@ -1400,7 +1403,7 @@ function Build-Compilers() {
     $BuildTools = Join-Path -Path (Get-BuildProjectBinaryCache BuildTools) -ChildPath bin
 
     if ($TestClang -or $TestLLD -or $TestLLDB -or $TestLLVM -or $TestSwift) {
-      $env:Path = "$($HostArch.BinaryCache)\cmark-gfm-0.29.0.gfm.13\src;$CompilersBinaryCache\tools\swift\libdispatch-windows-$($Arch.LLVMName)-prefix\bin;$CompilersBinaryCache\bin;$env:Path;$VSInstallRoot\DIA SDK\bin\$($HostArch.VSName);$UnixToolsBinDir"
+      $env:Path = "$(Get-CMark-BinaryCache($Arch))\src;$CompilersBinaryCache\tools\swift\libdispatch-windows-$($Arch.LLVMName)-prefix\bin;$CompilersBinaryCache\bin;$env:Path;$VSInstallRoot\DIA SDK\bin\$($HostArch.VSName);$UnixToolsBinDir"
       $Targets = @()
       $TestingDefines = @{
         SWIFT_BUILD_DYNAMIC_SDK_OVERLAY = "YES";
@@ -1745,7 +1748,7 @@ function Build-Runtime([Platform]$Platform, $Arch) {
 
 
   Isolate-EnvVars {
-    $env:Path = "$($BuildArch.BinaryCache)\cmark-gfm-0.29.0.gfm.13\src;$(Get-PinnedToolchainRuntime);${env:Path}"
+    $env:Path = "$(Get-CMark-BinaryCache($Arch))\src;$(Get-PinnedToolchainRuntime);${env:Path}"
 
     $CompilersBinaryCache = if ($IsCrossCompiling) {
       Get-BuildProjectBinaryCache Compilers
@@ -2374,6 +2377,41 @@ function Build-Format($Arch) {
     }
 }
 
+function Test-Format {
+  $SwiftPMArguments = @(
+    # swift-syntax
+    "-Xswiftc", "-I$(Get-HostProjectBinaryCache Compilers)\lib\swift\host",
+    "-Xswiftc", "-L$(Get-HostProjectBinaryCache Compilers)\lib\swift\host",
+    # swift-argument-parser
+    "-Xswiftc", "-I$(Get-HostProjectBinaryCache ArgumentParser)\swift",
+    "-Xlinker", "-L$(Get-HostProjectBinaryCache ArgumentParser)\lib",
+    # swift-cmark
+    "-Xswiftc", "-I$($SourceCache)\cmark\src\include",
+    "-Xswiftc", "-I$($SourceCache)\cmark\extensions\include",
+    "-Xlinker", "-I$($SourceCache)\cmark\extensions\include",
+    "-Xlinker", "$(Get-CMark-BinaryCache($HostArch))\src\cmark-gfm.lib",
+    "-Xlinker", "$(Get-CMark-BinaryCache($HostArch))\extensions\cmark-gfm-extensions.lib",
+    # swift-markdown
+    "-Xlinker", "$(Get-HostProjectBinaryCache Markdown)\lib\CAtomic.lib",
+    "-Xswiftc", "-I$($SourceCache)\swift-markdown\Sources\CAtomic\include",
+    "-Xswiftc", "-I$(Get-HostProjectBinaryCache Markdown)\swift",
+    "-Xlinker", "-L$(Get-HostProjectBinaryCache Markdown)\lib",
+    # swift-format
+    "-Xswiftc", "-I$(Get-HostProjectBinaryCache Format)\swift",
+    "-Xlinker", "-L$(Get-HostProjectBinaryCache Format)\lib"
+  )
+
+  Isolate-EnvVars {
+    $env:SWIFTFORMAT_BUILD_ONLY_TESTS=1
+    Build-SPMProject `
+      -Src "$SourceCache\swift-format" `
+      -Bin (Join-Path -Path $HostArch.BinaryCache -ChildPath swift-format) `
+      -Arch $HostArch `
+      -Test `
+      @SwiftPMArguments
+  }
+}
+
 function Build-IndexStoreDB($Arch) {
   $SDKInstallRoot = (Get-HostSwiftSDK);
 
@@ -2744,6 +2782,7 @@ if (-not $IsCrossCompiling) {
   }
   if ($Test -contains "llbuild") { Build-LLBuild $HostArch -Test }
   if ($Test -contains "swiftpm") { Test-PackageManager $HostArch }
+  if ($Test -contains "swift-format") { Test-Format }
 }
 
 # Custom exception printing for more detailed exception information