pyenv/libexec/rbenv-plugin-scripts

#!/usr/bin/env bash
set -e
[ -n "$RBENV_DEBUG" ] && set -x

# Provide rbenv completions
if [ "$1" = "--complete" ]; then
  echo exec
  echo rehash
  echo which
  exit
fi

RBENV_COMMAND="$1"
if [ -z "$RBENV_COMMAND" ]; then
  echo "usage: rbenv plugin-scripts COMMAND" >&2
  exit 1
fi

shopt -s nullglob
for path in ${RBENV_PLUGIN_PATH//:/$'\n'}; do
  for script in $path/"$RBENV_COMMAND"/*.bash; do
    echo $script
  done
done
shopt -u nullglob