Autodetect CI environment (#373)

- check for CI environment variables in build.cmd

Author: dougbu

.codeql.yml

@@ -47,7 +47,6 @@ jobs:
   timeoutInMinutes: 90
 
   steps:
-
   - task: UseDotNet@2
     inputs:
       useGlobalJson: true
@@ -58,7 +57,7 @@ jobs:
   - script: .\build.cmd EnableSkipStrongNames
     displayName: Windows Build - EnableSkipStrongNames
 
-  - script: .\build.cmd Build /p:BuildPortable=true /p:Desktop=false
+  - script: .\build.cmd Build /p:BuildPortable=true
     displayName: Windows Build
 
   - task: CodeQL3000Finalize@0

azure-pipelines.yml

@@ -65,7 +65,7 @@ jobs:
 
   - script: .\build.cmd EnableSkipStrongNames
     displayName: Enable SkipStrongNames
-  - script: .\build.cmd $(_BuildTarget) /p:Desktop=false /p:BuildPortable=true ^
+  - script: .\build.cmd $(_BuildTarget) /p:BuildPortable=true ^
       /binaryLogger:artifacts/msbuild.binlog /p:Configuration=$(_Configuration) /p:StyleCopEnabled=$(_StyleCopEnabled) ^
       /fileLoggerParameters:LogFile=artifacts/msbuild.log;Summary;Verbosity=minimal
     displayName: Build

build.cmd

@@ -38,15 +38,18 @@ if exist "%InstallDir%\MSBuild\15.0\Bin\MSBuild.exe" (
   goto BuildFail
 )
 
+REM Are we running in a local dev environment (not on CI)?
+if DEFINED CI (set Desktop=false) else if DEFINED TEAMCITY_VERSION (set Desktop=false) else (set Desktop=true)
+
 if "%1" == "" goto BuildDefaults
 
-%MSBuild% Runtime.msbuild /m /nr:false /p:Platform="Any CPU" /p:Desktop=true /v:M ^
+%MSBuild% Runtime.msbuild /m /nr:false /p:Platform="Any CPU" /p:Desktop=%Desktop% /v:M ^
     /fl /fileLoggerParameters:LogFile=bin\msbuild.log;Verbosity=Normal /consoleLoggerParameters:Summary /t:%*
 if %ERRORLEVEL% neq 0 goto BuildFail
 goto BuildSuccess
 
 :BuildDefaults
-%MSBuild% Runtime.msbuild /m /nr:false /p:Platform="Any CPU" /p:Desktop=true /v:M ^
+%MSBuild% Runtime.msbuild /m /nr:false /p:Platform="Any CPU" /p:Desktop=%Desktop% /v:M ^
     /fl /fileLoggerParameters:LogFile=bin\msbuild.log;Verbosity=Normal /consoleLoggerParameters:Summary
 if %ERRORLEVEL% neq 0 goto BuildFail
 goto BuildSuccess