[Fix] nvm ls, nvm alias, nvm install: error when an LTS name is invalid

nvm.sh

@@ -196,9 +196,6 @@ nvm_install_latest_npm() {
   nvm_echo 'Attempting to upgrade to the latest working version of npm...'
   local NODE_VERSION
   NODE_VERSION="$(nvm_strip_iojs_prefix "$(nvm_ls_current)")"
-  local NPM_VERSION
-  NPM_VERSION="$(npm --version 2>/dev/null)"
-
   if [ "${NODE_VERSION}" = 'system' ]; then
     NODE_VERSION="$(node --version)"
   elif [ "${NODE_VERSION}" = 'none' ]; then
@@ -209,6 +206,8 @@ nvm_install_latest_npm() {
     nvm_err 'Unable to obtain node version.'
     return 1
   fi
+  local NPM_VERSION
+  NPM_VERSION="$(npm --version 2>/dev/null)"
   if [ -z "${NPM_VERSION}" ]; then
     nvm_err 'Unable to obtain npm version.'
     return 2
@@ -692,11 +691,6 @@ nvm_ensure_version_installed() {
   LOCAL_VERSION="$(nvm_version "${PROVIDED_VERSION}")"
   EXIT_CODE="$?"
   local NVM_VERSION_DIR
-
-  if [ "_$PROVIDED_VERSION" = "_N/A" ] && [ ! -d "$NVM_RC_VERSION" ] ; then
-    PROVIDED_VERSION="$(nvm_ensure_version_prefix "$NVM_RC_VERSION")"
-  fi
-
   if [ "${EXIT_CODE}" != "0" ] || ! nvm_is_version_installed "${LOCAL_VERSION}"; then
     if VERSION="$(nvm_resolve_alias "${PROVIDED_VERSION}")"; then
       nvm_err "N/A: version \"${PROVIDED_VERSION} -> ${VERSION}\" is not yet installed."
@@ -706,12 +700,10 @@ nvm_ensure_version_installed() {
       nvm_err "N/A: version \"${PREFIXED_VERSION:-$PROVIDED_VERSION}\" is not yet installed."
     fi
     nvm_err ""
-    if [ "${PROVIDED_VERSION}" = 'lts' ]; then
-      nvm_err '`lts` is not an alias - you may need to run `nvm install --lts` to install and `nvm use --lts` to use it.'
-    elif [ "${IS_VERSION_FROM_NVMRC}" != '1' ]; then
-      nvm_err "You need to run \`nvm install ${PROVIDED_VERSION}\` to install and use it."
-    else
-      nvm_err 'You need to run `nvm install` to install and use the node version specified in `.nvmrc`.'
+    if [ "${IS_VERSION_FROM_NVMRC}" != '1' ]; then
+        nvm_err "You need to run \`nvm install ${PROVIDED_VERSION}\` to install and use it."
+      else
+        nvm_err 'You need to run `nvm install` to install and use the node version specified in `.nvmrc`.'
     fi
     return 1
   fi

test/slow/nvm use/Running 'nvm use lts' shows actionable error

@@ -1,19 +0,0 @@
-#!/bin/sh
-
-set -ex
-
-die () { echo "$@" ; exit 1; }
-
-\. ../../../nvm.sh
-
-# Deactivate any active node version
-nvm deactivate >/dev/null 2>&1 || die 'deactivate failed'
-
-# Attempt to use 'lts' without '--' and capture the error message
-ERROR_OUTPUT=$(nvm use lts 2>&1) || true
-
-EXPECTED_ERROR='`lts` is not an alias - you may need to run `nvm install --lts` to install and `nvm use --lts` to use it.'
-
-# Check if the error message matches the expected output
-echo "$ERROR_OUTPUT" | grep -q "$EXPECTED_ERROR" \
-  || die "Expected error message not found. Got: $ERROR_OUTPUT"

test/slow/nvm use/Running 'nvm use' displays .nvmrc version in output messages

@@ -1,23 +0,0 @@
-#!/bin/sh
-
-set -ex
-
-die () { echo $@ ; exit 1; }
-
-. ../../../nvm.sh
-
-echo "v0.10.28" > .nvmrc
-OUTPUT="$(nvm use 2>&1 >/dev/null | awk 'NR==1')"
-EXPECTED_OUTPUT='N/A: version "v0.10.28" is not yet installed.'
-TESTTT="$(nvm use 2>&1 >/dev/null)"
-TESTT="$(nvm use 2>&1)"
-TEST="$(nvm use)"
-
-[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] \
-  || die "'nvm use' did not output: '$EXPECTED_OUTPUT'; got: '$OUTPUT'; Normal: $TEST; with 2>&1: $TESTT; with /null: $TESTTT"
-
-OUTPUT="$(nvm use 2>&1 >/dev/null | awk 'NR==3')"
-EXPECTED_OUTPUT='You need to run "nvm install v0.10.28" to install it before using it.'
-
-[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] \
-  || die "'nvm use' did not output: '$EXPECTED_OUTPUT'; got: '$OUTPUT'"

test/slow/nvm use/setup_dir

@@ -19,9 +19,5 @@ for VERSION in "1.0.0" "1.0.1"; do
   nvm install "iojs-v$VERSION"
 done
 
-if [ -f ".nvmrc" ]; then
-  mv .nvmrc .nvmrc.bak
-fi
-
 nvm_make_alias lts/testing 0.10.1
 nvm_make_alias 'lts/*' lts/testing

test/slow/nvm use/teardown_dir

@@ -20,9 +20,3 @@ if [ -d "${NVM_DIR}/.nvm_use_lts_alias_bak" ]; then
   mv "${NVM_DIR}/.nvm_use_lts_alias_bak/*" "${NVM_DIR}/alias/lts/"
   rmdir "${NVM_DIR}/.nvm_use_lts_alias_bak"
 fi
-
-rm .nvmrc
-
-if [ -f ".nvmrc.bak" ]; then
-  mv .nvmrc.bak .nvmrc
-fi