From dc1d3aa9436b64fd144a0844f6cd05a1a5253788 Mon Sep 17 00:00:00 2001
From: Jordan Harband <ljharb@gmail.com>
Date: Sat, 17 Sep 2016 09:24:42 -0700
Subject: [PATCH] [Refactor] `nvm_install_source`, `nvm_install_binary`,
 `nvm_download_artifact`: ensure a version is provided.

---
 nvm.sh | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/nvm.sh b/nvm.sh
index ae9f6a1..adb006c 100644
--- a/nvm.sh
+++ b/nvm.sh
@@ -1516,6 +1516,11 @@ nvm_install_binary() {
 
   local PREFIXED_VERSION
   PREFIXED_VERSION="${3-}"
+  if [ -z "${PREFIXED_VERSION}" ]; then
+    nvm_err 'A version number is required.'
+    return 3
+  fi
+
   local VERSION
   VERSION="$(nvm_strip_iojs_prefix "${PREFIXED_VERSION}")"
 
@@ -1631,6 +1636,11 @@ nvm_download_artifact() {
   local VERSION
   VERSION="${4}"
 
+  if [ -z "${VERSION}" ]; then
+    nvm_err 'A version number is required.'
+    return 3
+  fi
+
   if [ "${KIND}" = 'binary' ] && ! nvm_binary_available "${VERSION}"; then
     nvm_err "No precompiled binary available for ${VERSION}."
     return
@@ -1745,6 +1755,11 @@ nvm_install_source() {
 
   local PREFIXED_VERSION
   PREFIXED_VERSION="${3-}"
+  if [ -z "${PREFIXED_VERSION}" ]; then
+    nvm_err 'A version number is required.'
+    return 3
+  fi
+
   local VERSION
   VERSION="$(nvm_strip_iojs_prefix "${PREFIXED_VERSION}")"