MSBuild in a Powershell Script - How do I know if the build succeeded?
Check the value of $LastExitCode right after the call to MSBUILD. If it is 0, then MSBUILD succeeded, otherwise it failed.
BTW there is no need to use cmd /c. Just call MSBUILD.exe directly. We do that in PowerShell build scripts all the time.
To just check for success/failure, use the automatic variable $?.
PS> help about_Automatic_Variables $? Contains the execution status of the last operation. It contains TRUE if the last operation succeeded and FALSE if it failed.
for example:
msbuildif (! $?) { throw "msbuild failed" }