From aa21d92b56e17cb8577b8b6a9233bd4c61fa5005 Mon Sep 17 00:00:00 2001
From: "David J. Malan" <malan@harvard.edu>
Date: Tue, 2 Jul 2024 19:08:16 -0400
Subject: [PATCH] detecting miscapitalized commands

---
 opt/cs50/lib/help50/bash | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/opt/cs50/lib/help50/bash b/opt/cs50/lib/help50/bash
index 796d8c6..defd38b 100755
--- a/opt/cs50/lib/help50/bash
+++ b/opt/cs50/lib/help50/bash
@@ -29,6 +29,13 @@ if [[ "$output" =~ $regex ]]; then
         exit
     fi
 
+    # If uppercase
+    argv0="${BASH_REMATCH[1],,}" # Lowercase it
+    if command -v "$argv0" &> /dev/null; then
+        echo "Did you mean to run \`$argv0\`, in lowercase instead?"
+        exit
+    fi
+
     # If backslash instead of forward slash
     if [[ "${BASH_REMATCH[1]}" =~ ^\.(.*) ]]; then
         if [[ -f "./${BASH_REMATCH[1]}" ]]; then