From 9fb9dec710e2c8d3aecb24c2a7c9f9fb45b1435b Mon Sep 17 00:00:00 2001
From: Jordan Harband <ljharb@gmail.com>
Date: Wed, 4 Sep 2024 13:54:41 -0700
Subject: [PATCH] [Fix] `nvm_normalize_lts`: error when an LTS name is not
 lowercase

Fixes #3417
---
 nvm.sh                                 | 4 ++++
 test/fast/Unit tests/nvm_normalize_lts | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/nvm.sh b/nvm.sh
index d991ff0..ce8bba5 100755
--- a/nvm.sh
+++ b/nvm.sh
@@ -891,6 +891,10 @@ nvm_normalize_lts() {
       fi
     ;;
     *)
+      if [ "${LTS}" != "$(echo "${LTS}" | command tr '[:upper:]' '[:lower:]')" ]; then
+        nvm_err 'LTS names must be lowercase'
+        return 3
+      fi
       nvm_echo "${LTS}"
     ;;
   esac
diff --git a/test/fast/Unit tests/nvm_normalize_lts b/test/fast/Unit tests/nvm_normalize_lts
index 0844f95..8f4f20d 100755
--- a/test/fast/Unit tests/nvm_normalize_lts	
+++ b/test/fast/Unit tests/nvm_normalize_lts	
@@ -16,6 +16,9 @@ ACTUAL="$(nvm_normalize_lts "lts/*")"
 EXPECTED='lts/*'
 [ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
 
+if ACTUAL="$(nvm_normalize_lts lts/ARGON)"; then
+  die "expected failure, got >${ACTUAL}<"
+fi
 
 MOCKS_DIR="../Unit tests/mocks"
 STAR="$(cat "$MOCKS_DIR/lts-star.txt")"