Add gulp buildpack.

buildpack/buildpacks/gulp/bin/compile

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+set -e            # fail fast
+set -o pipefail   # don't ignore exit codes when piping output
+# set -x          # enable debugging
+
+# Configure directories
+build_dir=$1
+cache_dir=$2
+env_dir=$3
+
+bp_dir=$(cd $(dirname $0); cd ..; pwd)
+
+# Load some convenience functions like status() and indent()
+source $bp_dir/bin/common.sh
+
+# Expose user-installed bower
+export PATH=$build_dir/node_modules/.bin:$PATH
+
+# Get gulp version
+gulp_bin=$(which gulp)
+status "Using Gulp from ${gulp_bin#$build_dir/}"
+gulp -v 2>&1 | indent
+
+# Run subsequent node/gulp commands from the build path
+cd $build_dir
+
+status "Building"
+gulp build 2>&1 | indent