More convenience.

build.sh

@@ -23,7 +23,7 @@ threads=$(($(nproc)+1))
 cd extern/bullet/
 mkdir -p build
 cd build
-if [[ $2 == "ninja" ]]
+if hash ninja 2>/dev/null
 then
     $cmake -DBUILD_DEMOS=0 -DBUILD_EXTRAS=0 -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=0 -GNinja ..
     ninja
@@ -38,7 +38,7 @@ cd $currentDir
 
 mkdir -p build
 cd build 
-if [[ $2 == "ninja" ]]
+if hash ninja 2>/dev/null
 then
     $cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=0 -GNinja ..
     ninja

package.sh

@@ -12,15 +12,17 @@ then
     platform="windows"
 fi
 
-#./build.sh clean
-
-if hash ninja 2>/dev/null
+binaries=$(ls binaries)
+if [[ $binaries == *.exe && $platform == linux ]]
 then
-    ./build.sh $platform ninja
-else
-    ./build.sh $platform
+    ./build.sh clean
+elif [[ $binaries != *.exe && $platform == windows ]]
+then
+    ./build.sh clean
 fi
 
+./build.sh $platform
+
 rc=$?
 
 if [[ $rc == 0 ]]