Added helper scripts for updating

update.sh updates the docker files with the latest version(s) of
Node.js and npm.

generate-stackbrew-library.sh is used for updating the library file

generate-stackbrew-library.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+set -e
+
+declare -A aliases
+aliases=(
+	[0.10]='0 latest'
+)
+
+cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
+
+versions=( */ )
+versions=( "${versions[@]%/}" )
+url='git://github.com/joyent/docker-node'
+
+echo '# maintainer: Joyent Image Team <soln@joyent.com> (@joyent)'
+
+for version in "${versions[@]}"; do
+	commit="$(git log -1 --format='format:%H' -- "$version")"
+	fullVersion="$(grep -m1 'ENV NODE_VERSION ' "$version/Dockerfile" | cut -d' ' -f3)"
+	versionAliases=( $fullVersion $version ${aliases[$version]} )
+	
+	echo
+	for va in "${versionAliases[@]}"; do
+		echo "$va: ${url}@${commit} $version"
+	done
+	
+	for variant in onbuild slim; do
+		commit="$(git log -1 --format='format:%H' -- "$version/$variant")"
+		echo
+		for va in "${versionAliases[@]}"; do
+			if [ "$va" = 'latest' ]; then
+				va="$variant"
+			else
+				va="$va-$variant"
+			fi
+			echo "$va: ${url}@${commit} $version/$variant"
+		done
+	done
+done

update.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -e
+
+cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
+
+versions=( "$@" )
+if [ ${#versions[@]} -eq 0 ]; then
+	versions=( */ )
+fi
+versions=( "${versions[@]%/}" )
+
+npmVersion="$(docker run --rm node npm show npm version)"
+for version in "${versions[@]}"; do
+	fullVersion="$(curl -sSL --compressed 'http://nodejs.org/dist' | grep '<a href="v'"$version." | sed -r 's!.*<a href="v([^"/]+)/?".*!\1!' | sort -V | tail -1)"
+	(
+		set -x
+		sed -ri '
+			s/^(ENV NODE_VERSION) .*/\1 '"$fullVersion"'/;
+			s/^(ENV NPM_VERSION) .*/\1 '"$npmVersion"'/;
+		' "$version/Dockerfile" "$version/slim/Dockerfile"
+		sed -ri 's/^(FROM node):.*/\1:'"$fullVersion"'/' "$version/onbuild/Dockerfile"
+	)
+done