From 86416c5fd62eaa6fd03de0bc1a6f6801f89a37f2 Mon Sep 17 00:00:00 2001
From: John Bates <jbates@zendesk.com>
Date: Tue, 19 Sep 2023 12:11:56 -0700
Subject: [PATCH] Canonicalize symlinked paths to rbenv executable

---
 bin/rbenv-doctor | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/bin/rbenv-doctor b/bin/rbenv-doctor
index 50c8576..2d11f49 100755
--- a/bin/rbenv-doctor
+++ b/bin/rbenv-doctor
@@ -24,6 +24,21 @@ fix-usr-bin() {
   sed 's:^/usr/bin/:/bin/:'
 }
 
+# NOTE: readlink -f is supported on MacOS 12.3+
+#       (https://apple.stackexchange.com/a/464138/141312)
+canonicalize-symlinks() {
+  files=()
+  IFS=$'\n' read -d '' -r -a files
+  count=${#files[@]}
+  idx=0
+  while [[ $idx -lt $count ]]; do
+    if ! readlink -f "${files[$idx]}" 2> /dev/null; then
+      echo "${files[$idx]}"
+    fi
+    idx=$((idx+1))
+  done
+}
+
 printc() {
   local color_name="color_$1"
   local msg="$2"
@@ -55,7 +70,7 @@ fi
 warnings=0
 
 echo -n "Checking for \`rbenv' in PATH: "
-num_locations="$(command-list rbenv | fix-usr-bin | uniq | count-lines)"
+num_locations="$(command-list rbenv | fix-usr-bin | canonicalize-symlinks | uniq | count-lines)"
 if [ "$num_locations" -eq 0 ]; then
   printc red "not found"
   echo