title: xcodebuild -list can not find scheme which existed
body: <p>I have xcode project, I want to build this project under command line, this project composed many sub-project, first I fetch these source files to local disk, I use xcodebuild -list to find scheme, I can not find anything, while after I manually open this project with xcode and then use xcodebuild -list to find scheme, some scheme can be seen. </p>
  
  <p>I compare the project file of these two scenario, for the second project, there existed xcuserdata folder, so I can find the scheme, the problem I need use scheme to build this project. </p>
  
  <p>Any suggestion will be appreciated.</p>