experimental/fiddle: update to work again

experimental/fiddle/fiddle_test

Index: experimental/fiddle/fiddle_test
diff --git a/experimental/fiddle/fiddle_test b/experimental/fiddle/fiddle_test
old mode 100644
new mode 100755
index 7955d6861414af8fe6a3f92768593e274faa351b..c19914248b7d2b4de8d16fa886c8c19014d14b33
--- a/experimental/fiddle/fiddle_test
+++ b/experimental/fiddle/fiddle_test
@@ -11,17 +11,19 @@ set -x
 
 cd "$(dirname "$0")/../.."
 skia_dir="$PWD"
-cores=32
 
-echo "Bootstrapping CMake"
-cmake_dir="${skia_dir}/third_party/externals/cmake"
-cd "$cmake_dir"
-./bootstrap --parallel=$cores
-make -j $cores cmake
+if ! command -v cmake > /dev/null 2>&1 ; then
+    cores=32
+    echo "Bootstrapping CMake"
+    cmake_dir="${skia_dir}/third_party/externals/cmake"
+    cd "$cmake_dir"
+    ./bootstrap --parallel=$cores
+    make -j $cores cmake
+    export PATH="${cmake_dir}/bin:${PATH}"
+fi
 
-echo "Building fiddle bootstrapped CMake"
+echo "Building Skia and Fiddle"
 cd "${skia_dir}/experimental/fiddle"
-export PATH="${cmake_dir}/bin:${PATH}"
 go build fiddler.go
 ./fiddler "$skia_dir"
 ./fiddler "$skia_dir" draw.cpp > /dev/null