add pyenv-virtualenv-prefix

bin/pyenv-virtualenv-prefix

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+#
+# Summary: Display real_prefix for a Python virtualenv version
+# Usage: pyenv virtualenv-prefix [<virtualenv>]
+#
+
+set -e
+[ -n "$PYENV_DEBUG" ] && set -x
+
+if [ -z "$PYENV_ROOT" ]; then
+  PYENV_ROOT="${HOME}/.pyenv"
+fi
+
+if [ -n "$1" ]; then
+  export PYENV_VERSION="$1"
+fi
+
+PYTHON_BIN="$(pyenv-which python)"
+"${PYTHON_BIN}" -c 'import sys;print(sys.real_prefix)' 2>/dev/null

bin/pyenv-virtualenvs

@@ -23,7 +23,7 @@ print_version() {
   if [ -n "${BARE}" ]; then
     echo "${version}"
   else
-    echo "${version} (created from $(virtualenv_origin "${version}"))"
+    echo "${version} (created from $(pyenv-virtualenv-prefix "${version}"))"
   fi
 }
 
@@ -33,13 +33,6 @@ virtualenv_version() {
   [ -f "${prefix}/bin/activate" ] && "${prefix}/bin/python" -c 'import sys;sys.real_prefix' 1>/dev/null 2>&1
 }
 
-virtualenv_origin() {
-  local version="$1"
-  local prefix="$(pyenv-prefix "${version}")"
-  local origin="$("${prefix}/bin/python" -c 'import sys;print(sys.real_prefix)' 2>/dev/null || true)"
-  echo "${origin:-unknown}"
-}
-
 versions=($(pyenv-versions --bare))
 
 for version in "${versions[@]}"; do