Merge pull request #26898 from sharwell/build-launch

Add -launch flag to the build script

build/scripts/build.ps1

@@ -29,6 +29,7 @@ param (
     [switch]$packAll = $false,
     [switch]$binaryLog = $false,
     [switch]$deployExtensions = $false,
+    [switch]$launch = $false,
     [switch]$procdump = $false,
     [string]$signType = "",
     [switch]$skipBuildExtras = $false,
@@ -116,6 +117,11 @@ function Process-Arguments() {
         exit 1
     }
 
+    if ($build -and $launch -and -not $deployExtensions) {
+        Write-Host -ForegroundColor Red "Cannot combine -build and -launch without -deployExtensions"
+        exit 1
+    }
+
     $script:pack = $pack -or $packAll
     $script:packAll = $packAll -or ($pack -and $official)
 
@@ -246,7 +252,7 @@ function Build-Artifacts() {
         Run-MSBuild "Compilers.sln" -useDotnetBuild
     }
     elseif ($build) {
-        Run-MSBuild "Roslyn.sln" "/p:DeployExtension=$deployExtensions"
+        Run-MSBuild "Roslyn.sln" $(if (-not $deployExtensions) {"/p:DeployExtension=false"})
         if (-not $skipBuildExtras) {
             Build-ExtraSignArtifacts
         }
@@ -799,6 +805,12 @@ try {
         Test-XUnit
     }
 
+    if ($launch) {
+        $devenvExe = Get-VisualStudioDir
+        $devenvExe = Join-Path $devenvExe 'Common7\IDE\devenv.exe'
+        &$devenvExe /rootSuffix RoslynDev
+    }
+
     exit 0
 }
 catch {