Exit with error code instead of continuing when no source provided
Exit with error code instead of continuing when no source provided

mr-doc/mr-doc,eddywashere/doxx,iwatakeshi/mr-doc,tes/mr-doc,japboy/mr-doc,eddywashere/doxx,FGRibreau/doxx,mr-doc/mr-doc,eddywashere/doxx,japboy/mr-doc,tes/mr-doc,iwatakeshi/mr-doc,japboy/mr-doc,FGRibreau/doxx,tes/mr-doc