pyenv/libexec/pyenv-commands

#!/usr/bin/env bash
# Summary: List all available pyenv commands
# Usage: pyenv commands [--sh|--no-sh]

set -e
[ -n "$PYENV_DEBUG" ] && set -x

# Provide pyenv completions
if [ "$1" = "--complete" ]; then
  echo --sh
  echo --fish
  echo --no-sh
  exit
fi

if [ "$1" = "--sh" ] || [ "$1" = "--fish" ]; then
  sh="${1##--}-"
  shift
elif [ "$1" = "--no-sh" ] || [ "$1" = "--no-fish" ]; then
  nosh=1
  shift
fi

shopt -s nullglob

{ for path in ${PATH//:/$'\n'}; do
    for command in "${path}/pyenv-"*; do
      command="${command##*pyenv-}"
      if [ -n "$sh" ]; then
        if [[ "${command}" == "${sh}"* ]]; then
          echo "${command##${sh}}"
        fi
      elif [ -n "$nosh" ]; then
        if [ "${command:0:3}" != "sh-" ] && [ "${command:0:5}" != "fish-" ]; then
          echo "$command"
        fi
      else
        if [ "${command:0:3}" = "sh-" ]; then
          echo "${command##sh-}"
        elif [ "${command:0:5}" = "fish-" ]; then
          echo "${command##fish-}"
        else
          echo "${command}"
        fi
      fi
    done
  done
} | sort | uniq