added check for old versions for existing users

build.cmd

@@ -6,6 +6,20 @@ set ROOT_DIR=%~dp0
 REM // Check command line arguments
 set "noFullPolyCar="
 
+REM //check VS version
+if "%VisualStudioVersion%"=="" (
+    echo(
+    echo oh oh... You need to run this command from x64 Native Tools Command Prompt for VS 2017.
+    goto :buildfailed_nomsg
+)
+if "%VisualStudioVersion%"=="14.0" (
+    echo(
+    echo Hello there! We just upgraded AirSim to Unreal Engine 4.18 and Visual Studio 2017.
+    echo Here are few easy steps for upgrade so everything is new and shiny:
+    echo https://github.com/Microsoft/AirSim/blob/master/docs/unreal_upgrade.md
+    goto :buildfailed_nomsg
+)
+
 if "%1"=="" goto noargs
 if "%1"=="--no-full-poly-car" set "noFullPolyCar=y"
 
@@ -19,7 +33,7 @@ if ERRORLEVEL 1 (
   CALL check_cmake.bat
   if ERRORLEVEL 1 (
     echo(
-    echo ERROR: cmake was not installed correctly.
+    echo ERROR: cmake was not installed correctly, we tried.
     goto :buildfailed
   )
 )
@@ -141,9 +155,11 @@ REM //---------- done building ----------
 exit /b 0
 
 :buildfailed
-chdir /d %ROOT_DIR% 
 echo(
 echo #### Build failed - see messages above. 1>&2
+
+:buildfailed_nomsg
+chdir /d %ROOT_DIR% 
 exit /b 1
 
 

build.sh

@@ -7,6 +7,18 @@ pushd "$SCRIPT_DIR"  >/dev/null
 set -e
 # set -x
 
+#check for correct verion of llvm
+if [[ ! -d "llvm-source-50" ]]; then
+    if [[ -d "llvm-source-39" ]]; then
+        echo "Hello there! We just upgraded AirSim to Unreal Engine 4.18."
+        echo "Here are few easy steps for upgrade so everything is new and shiny :)"
+        echo "https://github.com/Microsoft/AirSim/blob/master/docs/unreal_upgrade.md"
+        exit 1
+    else
+        echo "The llvm-souce-50 folder was not found! Mystery indeed.""
+    fi
+fi
+
 # check for libc++
 if [[ !(-d "./llvm-build/output/lib") ]]; then
     echo "ERROR: clang++ and libc++ is necessary to compile AirSim and run it in Unreal engine"

setup.sh

@@ -3,6 +3,13 @@
 set -x
 set -e
 
+if [[ -d "llvm-source-39" ]]; then
+    echo "Hello there! We just upgraded AirSim to Unreal Engine 4.18."
+    echo "Here are few easy steps for upgrade so everything is new and shiny :)"
+    echo "https://github.com/Microsoft/AirSim/blob/master/docs/unreal_upgrade.md"
+    exit 1
+fi
+
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 pushd "$SCRIPT_DIR" >/dev/null