allow usage of multiple nodejs versions

bin/compile

@@ -4,6 +4,11 @@
 # fail fast
 set -e
 
+function error() {
+  echo " !     $*"
+  exit 1
+}
+
 function mktmpdir() {
   dir=$(mktemp -t node-$1-XXXX)
   rm -rf $dir
@@ -33,7 +38,14 @@ run_npm() {
 unset GIT_DIR
 
 function manifest_versions() {
-  curl "http://${S3_BUCKET}.s3.amazonaws.com/manifest.${1}" -s -o -
+  curl "http://${S3_BUCKET}.s3.amazonaws.com/manifest.${1}" -s -o - | tr -s '\n' ' '
+}
+
+function resolve_versions() {
+  args=""
+  for version in $1; do args="${args} -v \"${version}\""; done
+  for version in $2; do args="${args} -r \"${version}\""; done
+  eval vendor/node-semver/bin/semver ${args} | tail -r | head -n1
 }
 
 # config
@@ -49,14 +61,6 @@ LP_DIR=`cd $(dirname $0); cd ..; pwd`
 CACHE_STORE_DIR="$CACHE_DIR/node_modules/$NPM_VERSION"
 CACHE_TARGET_DIR="$BUILD_DIR/node_modules"
 
-# bootstrap node
-NODE_PACKAGE="http://${S3_BUCKET}.s3.amazonaws.com/nodejs-${DEFAULT_NODE_VERSION}.tgz"
-VENDORED_NODE="$(mktmpdir node)"
-echo "-----> Bootstraping Node.js"
-mkdir -p $VENDORED_NODE  && curl $NODE_PACKAGE -s -o -  | tar xzf - -C $VENDORED_NODE
-OLDPATH="$PATH"
-PATH="$VENDORED_NODE/bin:$PATH"
-
 # determine available versions
 NODEJS_VERSIONS=$(manifest_versions "nodejs")
 NPM_VERSIONS=$(manifest_versions "npm")
@@ -84,7 +88,6 @@ else
     NODE_VERSION=${RESOLVED_NODE}
   fi
 fi
-
 echo "-----> Using Node.js version: ${NODE_VERSION}"
 
 # resolve npm version
@@ -94,16 +97,13 @@ else
   RESOLVED_NPM=$(resolve_versions "${NPM_VERSIONS}" "${REQUESTED_NPM_VERSION}")
 
   if [ "${RESOLVED_NPM}" == "" ]; then
-    error "Requested npm version: ${REQUESTED_NPM_VERSION} does not match available versions: ${NPMJS_VERSIONS}"
+    error "Requested Node.js version: ${REQUESTED_NPM_VERSION} does not match available versions: ${NPMJS_VERSIONS}"
   else
     NPM_VERSION=${RESOLVED_NPM}
   fi
 fi
 echo "-----> Using npm version: ${NPM_VERSION}"
 
-# reset path to undo bootstrapped node
-PATH="$OLDPATH"
-
 # s3 packages
 NODE_PACKAGE="http://${S3_BUCKET}.s3.amazonaws.com/nodejs-${NODE_VERSION}.tgz"
 NPM_PACKAGE="http://${S3_BUCKET}.s3.amazonaws.com/npm-${NPM_VERSION}.tgz"
@@ -114,9 +114,6 @@ VENDORED_NODE="$(mktmpdir node)"
 VENDORED_NPM="$(mktmpdir npm)"
 VENDORED_SCONS="$(mktmpdir scons)"
 
-# determine node version
-echo "available versions of node: $(manifest_versions "nodejs")"
-
 # download and unpack packages
 echo "-----> Fetching Node.js binaries"
 mkdir -p $VENDORED_NODE  && curl $NODE_PACKAGE -s -o -  | tar xzf - -C $VENDORED_NODE