Use prebuilt Clang binaries for OSX in Travis

Fix copying of directory

Unity/build.sh

@@ -9,8 +9,13 @@ fi
 
 
 cd linux-build;
-export CC="clang-5.0"
-export CXX="clang++-5.0"
+if [[ -n $CIINSTALL ]]; then # use downloaded binaries on Travis
+    export CC=${LLVM_DIR}/bin/clang
+    export CXX=${LLVM_DIR}/bin/clang++
+else
+    export CC="clang-5.0"
+    export CXX="clang++-5.0"
+fi
 
 if [ "$(uname)" == "Darwin" ]; then
     CMAKE="$(greadlink -f ../../cmake_build/bin/cmake)"
@@ -25,7 +30,7 @@ if [ ! -d "../UnityDemo/Assets/Plugins" ]; then
 fi
 
 if [ "$(uname)" == "Darwin" ]; then
-	cp AirsimWrapper.bundle ../UnityDemo/Assets/Plugins;
+	cp -r AirsimWrapper.bundle ../UnityDemo/Assets/Plugins;
 else
 	cp libAirsimWrapper.so ../UnityDemo/Assets/Plugins;
 fi

build.sh

@@ -84,8 +84,15 @@ else
     # variable for build output
     build_dir=build_debug
     if [ "$(uname)" == "Darwin" ]; then
-        export CC=/usr/local/opt/llvm-5.0/bin/clang-5.0
-        export CXX=/usr/local/opt/llvm-5.0/bin/clang++-5.0
+
+        if [[ -n $CIINSTALL ]]; then # use downloaded binaries on Travis
+            export CC=${LLVM_DIR}/bin/clang
+            export CXX=${LLVM_DIR}/bin/clang++
+        else
+            export CC=/usr/local/opt/llvm-5.0/bin/clang-5.0
+            export CXX=/usr/local/opt/llvm-5.0/bin/clang++-5.0
+        fi
+
     else
         export CC="clang-5.0"
         export CXX="clang++-5.0"

setup.sh

@@ -60,13 +60,19 @@ if $gccBuild; then
 else
     # llvm tools
     if [ "$(uname)" == "Darwin" ]; then # osx
-        brew update
 
-        # brew install [email protected]
-        brew tap llvm-hs/homebrew-llvm
-        brew install llvm-5.0
-        export C_COMPILER=/usr/local/opt/llvm-5.0/bin/clang-5.0
-        export COMPILER=/usr/local/opt/llvm-5.0/bin/clang++-5.0
+        if [[ -n $CIINSTALL ]]; then # use downloaded binaries on Travis
+            export C_COMPILER=${LLVM_DIR}/bin/clang
+            export COMPILER=${LLVM_DIR}/bin/clang++
+        else
+            brew update
+
+            # brew install [email protected]
+            brew tap llvm-hs/homebrew-llvm
+            brew install llvm-5.0
+            export C_COMPILER=/usr/local/opt/llvm-5.0/bin/clang-5.0
+            export COMPILER=/usr/local/opt/llvm-5.0/bin/clang++-5.0
+        fi
 
     else #linux
         #install clang and build tools