add a warning of no version of node.js specified in package.json

bin/compile

@@ -116,6 +116,15 @@ engine_versions["npm"]=$(manifest_versions "npm")
 engine_requests["npm"]=$(package_engine_version "npm")
 
 echo "-----> Resolving engine versions"
+
+# add a warning if no version of node specified
+if [ "${engine_requests["node"]}" == "" ]; then
+  echo
+  echo "WARNING: No version of Node.js specified in package.json, see:" | indent
+  echo "https://devcenter.heroku.com/articles/nodejs-versions" | indent
+  echo
+fi
+
 NODE_VERSION=$(package_resolve_version "node")
 echo "Using Node.js version: ${NODE_VERSION}" | indent
 

bin/test

@@ -21,6 +21,7 @@ testDetectWithoutPackageJson() {
 
 testPackageJsonWithVersion() {
   compile "package-json-version"
+  assertNotCaptured "WARNING: No version of Node.js specified"
   assertCaptured "Using Node.js version: 0.6.11"
   assertCaptured "Using npm version: 1.1.9"
   assertCapturedSuccess
@@ -28,6 +29,7 @@ testPackageJsonWithVersion() {
 
 testPackageJsonWithoutVersion() {
   compile "package-json-noversion"
+  assertCaptured "WARNING: No version of Node.js specified"
   assertCaptured "Using Node.js version: 0.4.7"
   assertCaptured "Using npm version: 1.0.106"
   assertCapturedSuccess