Create nvm_version_path

nvm.sh

@@ -95,6 +95,16 @@ nvm_rc_version() {
   fi
 }
 
+nvm_version_path() {
+  local VERSION
+  VERSION="$1"
+  if [ -z "$VERSION" ]; then
+    echo "$NVM_DIR"
+  elif [ ! -z "$VERSION" ]; then
+    echo "$NVM_DIR/$VERSION"
+  fi
+}
+
 # Expand a version using the version cache
 nvm_version() {
   local PATTERN

test/fast/Unit tests/nvm_version_path

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+die () { echo $@ ; exit 1; }
+
+. ../../../nvm.sh
+
+[ "$(nvm_version_path)" = "$NVM_DIR" ] &&
+[ "$(nvm_version_path foo)" = "$NVM_DIR/foo" ]
+