From a33b30fa2db1211ccecd8e0079dd476692ce99d6 Mon Sep 17 00:00:00 2001
From: Tim Hawes <trhawes@gmail.com>
Date: Sun, 2 Aug 2026 21:39:49 -0400
Subject: [PATCH] versions: fix --executables portability regression

Replace the use of `xargs -r` and `basename -a` in the
`--executables` fast path with Bash 3.2-compatible parameter
expansion.

The previous implementation relied on non-portable utility options,
causing `pyenv rehash` and shell initialization to fail on illumos,
OpenBSD, and other non-GNU userlands.

Preserve the optimized executable discovery path by continuing to
discover executables directly from the versions directory and
deduplicate their basenames.
---
 libexec/pyenv-versions | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/libexec/pyenv-versions b/libexec/pyenv-versions
index 91cb56d4..1466209c 100755
--- a/libexec/pyenv-versions
+++ b/libexec/pyenv-versions
@@ -42,9 +42,15 @@ versions_dir="${PYENV_ROOT}/versions"
 if [[ -n "$executables" ]]; then
   if [ -d "$versions_dir" ]; then
     shopt -s dotglob nullglob
-    # MacOS 12+ and FreeBSD 15 support `xargs -r -0' and `basename -a'
-    # `sort -u` is simpler and a bit faster than `awk '!seen[$0]++'`, with the same result for rehash purposes
-    printf '%s\0' "$versions_dir"/*/bin/* "$versions_dir"/*/envs/*/bin/* | xargs -0 -r basename -a | sort -u
+    # Fast path for rehash: skip filtering and link resolution.
+    # Discover executables directly from the versions directory and
+    # deduplicate their basenames. Use bash 3.2 conventions to keep code portable.
+    for path in \
+      "$versions_dir"/*/bin/* \
+      "$versions_dir"/*/envs/*/bin/*
+    do
+      printf '%s\n' "${path##*/}"
+    done | sort -u
     shopt -u dotglob nullglob
   fi
   exit 0