fix build showing success on failing project

scripts/build.ps1

@@ -33,9 +33,22 @@ if (!$env:DOTNET_BUILD_VERSION) {
 
 Write-Host -ForegroundColor Green "*** Building dotnet tools version $($env:DOTNET_BUILD_VERSION) - $Configuration ***"
 & "$PSScriptRoot\compile.ps1" -Configuration:$Configuration
+if (!$?) {
+    Write-Host "Building dotnet tools finished with errors."
+    Exit 1
+}
 
 Write-Host -ForegroundColor Green "*** Packaging dotnet ***"
 & "$PSScriptRoot\package\package.ps1"
+if (!$?) {
+    Write-Host "Packaging dotnet finished with errors."
+    Exit 1
+}
+
 
 Write-Host -ForegroundColor Green "*** Generating dotnet MSI ***"
 & "$RepoRoot\packaging\windows\generatemsi.ps1" $Stage2Dir
+if (!$?) {
+    Write-Host "Generating dotnet MSI finished with errors."
+    Exit 1
+}

scripts/build/build-stage.ps1

@@ -48,10 +48,19 @@ $RuntimeOutputDir = "$OutputDir\runtime\coreclr"
 # Publish each project
 $Projects | ForEach-Object {
     dotnet publish --framework "$Tfm" --runtime "$Rid" --output "$OutputDir\bin" --configuration "$Configuration" "$RepoRoot\src\$_"
+    if (!$?) {
+        Write-Host Command failed: dotnet publish --framework "$Tfm" --runtime "$Rid" --output "$OutputDir\bin" --configuration "$Configuration" "$RepoRoot\src\$_"
+        exit 1
+    }
 }
 
 # Publish the runtime
 dotnet publish --framework "$Tfm" --runtime "$Rid" --output "$RuntimeOutputDir" --configuration "$Configuration" "$RepoRoot\src\Microsoft.DotNet.Runtime"
+if (!$?) {
+    Write-Host Command failed: dotnet publish --framework "$Tfm" --runtime "$Rid" --output "$RuntimeOutputDir" --configuration "$Configuration" "$RepoRoot\src\Microsoft.DotNet.Runtime"
+    Exit 1
+}
+
 
 # Clean up bogus additional files
 $FilesToClean | ForEach-Object {

scripts/compile.ps1

@@ -26,6 +26,11 @@ Download it from https://www.cmake.org
     # Install a stage 0
     header "Installing dotnet stage 0"
     & "$PSScriptRoot\install.ps1"
+    if (!$?) {
+        Write-Host "Command failed: $PSScriptRoot\install.ps1"
+        Exit 1
+    }
+
 
     # Put stage 0 on the path
     $DotNetTools = $env:DOTNET_INSTALL_DIR
@@ -47,6 +52,11 @@ Download it from https://www.cmake.org
     # Restore packages
     header "Restoring packages"
     dotnet restore "$RepoRoot" --quiet --runtime "osx.10.10-x64" --runtime "ubuntu.14.04-x64" --runtime "win7-x64" --no-cache
+    if (!$?) {
+        Write-Host "Command failed: " dotnet restore "$RepoRoot" --quiet --runtime "osx.10.10-x64" --runtime "ubuntu.14.04-x64" --runtime "win7-x64" --no-cache
+        Exit 1
+    }
+
 
     header "Building corehost"
     pushd "$RepoRoot\src\corehost"
@@ -78,15 +88,30 @@ Download it from https://www.cmake.org
     # Build Stage 1
     header "Building stage1 dotnet using downloaded stage0 ..."
     & "$PSScriptRoot\build\build-stage.ps1" -Tfm:$Tfm -Rid:$Rid -Configuration:$Configuration -OutputDir:$Stage1Dir -RepoRoot:$RepoRoot -HostDir:$HostDir
+    if (!$?) {
+        Write-Host "Command failed: $PSScriptRoot\build\build-stage.ps1" -Tfm:$Tfm -Rid:$Rid -Configuration:$Configuration -OutputDir:$Stage1Dir -RepoRoot:$RepoRoot -HostDir:$HostDir
+        Exit 1
+    }
+
 
     # Build Stage 2 using Stage 1
     $env:PATH = "$Stage1Dir\bin;$StartPath"
     header "Building stage2 dotnet using just-built stage1 ..."
     & "$PSScriptRoot\build\build-stage.ps1" -Tfm:$Tfm -Rid:$Rid -Configuration:$Configuration -OutputDir:$Stage2Dir -RepoRoot:$RepoRoot -HostDir:$HostDir
+    if (!$?) {
+        Write-Host "Command failed: $PSScriptRoot\build\build-stage.ps1" -Tfm:$Tfm -Rid:$Rid -Configuration:$Configuration -OutputDir:$Stage2Dir -RepoRoot:$RepoRoot -HostDir:$HostDir
+        Exit 1
+    }
+
 
     # Crossgen Roslyn
     header "Crossgening Roslyn compiler ..."
     cmd /c "$PSScriptRoot\crossgen\crossgen_roslyn.cmd" "$Stage2Dir"
+    if (!$?) {
+        Write-Host "Command failed: " cmd /c "$PSScriptRoot\crossgen\crossgen_roslyn.cmd" "$Stage2Dir"
+        Exit 1
+    }
+
 
     # Copy dnx into stage 2
     cp -rec "$DnxDir\" "$Stage2Dir\bin\dnx\"
@@ -98,10 +123,20 @@ Download it from https://www.cmake.org
     $env:PATH = "$Stage2Dir\bin;$StartPath"
     header "Acquiring Native App Dependencies"
     cmd /c "$PSScriptRoot\build\build_appdeps.cmd" "$Stage2Dir"
+    if (!$?) {
+        Write-Host "Command failed: " cmd /c "$PSScriptRoot\build\build_appdeps.cmd" "$Stage2Dir"
+        Exit 1
+    }
+
 
     # Smoke test stage2
     $env:DOTNET_HOME = "$Stage2Dir"
     & "$PSScriptRoot\test\smoke-test.ps1"
+    if (!$?) {
+        Write-Host "Command failed: $PSScriptRoot\test\smoke-test.ps1"
+        Exit 1
+    }
+
 } finally {
     $env:PATH = $StartPath
     $env:DOTNET_HOME = $StartDotNetHome