#!/usr/bin/env bash
#
# Summary: List all Python virtualenvs found in `$PYENV_ROOT/versions/*'.
#
# Usage: pyenv virtualenvs [--bare]
#

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

if [ -z "$PYENV_ROOT" ]; then
  PYENV_ROOT="${HOME}/.pyenv"
fi

if [ "$1" = "--bare" ]; then
  hit_prefix=""
  miss_prefix=""
  current_versions=()
  print_origin=""
else
  hit_prefix="* "
  miss_prefix="  "
  current_versions=($(IFS=:; for version in $(pyenv-version-name); do echo "$version"; done))
  print_origin="1"
fi

array_exists() {
  local x car="$1"
  shift
  for x in "$@"; do
    [ "${x}" = "${car}" ] && return 0
  done
  return 1
}

print_version() {
  if [ -n "${print_origin}" ]; then
    local version_origin="$2"
  else
    local version_origin=""
  fi
  if array_exists "$1" "${current_versions[@]}"; then
    echo "${hit_prefix}${1}${version_origin}"
  else
    echo "${miss_prefix}${1}${version_origin}"
  fi
}

for version in $(pyenv-versions --bare); do
  if [[ "${version}" != "system" ]]; then
    virtualenv_prefix="$(pyenv-virtualenv-prefix "${version}" 2>/dev/null || true)"
    if [ -d "${virtualenv_prefix}" ]; then
      print_version "${version}" " (created from ${virtualenv_prefix})"
    fi
  fi
done