From a4f80ce23f2bba93244c577b571b08b345c3d95e Mon Sep 17 00:00:00 2001
From: Romwierz <miczu47@gmail.com>
Date: Mon, 7 Sep 2026 18:10:43 +0200
Subject: [PATCH] pyenv-exec: add option to modify python runtime for the
 called executable

The only variables modified are $PYTHONHOME and $LD_LIBRARY_PATH which will allow the executable to use the shared library of the Python version which is selected with pyenv.
---
 libexec/pyenv-exec | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/libexec/pyenv-exec b/libexec/pyenv-exec
index d0f6d071..6477d7f9 100755
--- a/libexec/pyenv-exec
+++ b/libexec/pyenv-exec
@@ -2,7 +2,9 @@
 #
 # Summary: Run an executable with the selected Python version
 #
-# Usage: pyenv exec <command> [arg1 arg2...]
+# Usage: pyenv exec [-E|--environment] <command> [arg1 arg2...]
+#
+#    -E  Modify Python runtime environment, such as $PYTHONHOME, for the called executable.
 #
 # Runs an executable by first preparing PATH so that the selected Python
 # version's `bin' directory is at the front.
@@ -18,9 +20,16 @@ set -e
 
 # Provide pyenv completions
 if [ "$1" = "--complete" ]; then
+  echo --environment
   exec pyenv-shims --short
 fi
 
+unset MODIFY_ENV
+if [ "$1" = "-E" ] || [ "$1" = "--environment" ]; then
+  MODIFY_ENV=true
+  shift
+fi
+
 PYENV_VERSION="$(pyenv-version-name -f)"
 PYENV_COMMAND="$1"
 
@@ -54,4 +63,8 @@ if [ "${PYENV_BIN_PATH#${PYENV_ROOT}}" != "${PYENV_BIN_PATH}" ]; then
   # Only add to $PATH for non-system version.
   export PATH="${PYENV_BIN_PATH}:${PATH}"
 fi
+if [ -n "$MODIFY_ENV" ]; then
+  export PYTHONHOME="$(pyenv-prefix)"
+  export LD_LIBRARY_PATH="${PYTHONHOME}/lib:${LD_LIBRARY_PATH}"
+fi
 exec "$PYENV_COMMAND_PATH" "$@"