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;;; pyenv-mode.el --- Integrate pyenv with python-mode
;; Copyright (C) 2014-2016 by Artem Malyshev
;; Author: Artem Malyshev <>
;; URL:
;; Version: 0.1.0
;; Package-Requires: ((pythonic "0.1.0"))
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <>.
;;; Commentary:
;; See the README for more details.
;;; Code:
(require 'pythonic)
(defgroup pyenv nil
"Pyenv virtualenv integration with python mode."
:group 'languages)
(defcustom pyenv-mode-mode-line-format
(when (pyenv-mode-version)
(concat "Pyenv:" (pyenv-mode-version) " ")))
"How `pyenv-mode' will indicate the current python version in the mode line."
:group 'pyenv)
(defun pyenv-mode-version ()
"Return currently active pyenv version."
(getenv "PYENV_VERSION"))
(defun pyenv-mode-root ()
"Pyenv installation path."
(replace-regexp-in-string "\n" "" (shell-command-to-string "pyenv root")))
(defun pyenv-mode-full-path (version)
"Return full path for VERSION."
(unless (string= version "system")
(concat (pyenv-mode-root) "/versions/" version)))
(defun pyenv-mode-versions ()
"List installed python versions."
(let ((versions (shell-command-to-string "pyenv versions --bare")))
(cons "system" (split-string versions))))
(defun pyenv-mode-read-version ()
"Read virtual environment from user input."
(completing-read "Pyenv: " (pyenv-mode-versions)))
(defun pyenv-mode-set (version)
"Set python shell VERSION."
(interactive (list (pyenv-mode-read-version)))
(pythonic-activate (pyenv-mode-full-path version))
(setenv "PYENV_VERSION" version)
(defun pyenv-mode-unset ()
"Unset python shell version."
(setenv "PYENV_VERSION")
(defvar pyenv-mode-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "C-c C-s") 'pyenv-mode-set)
(define-key map (kbd "C-c C-u") 'pyenv-mode-unset)
"Keymap for pyenv-mode.")
(define-minor-mode pyenv-mode
"Minor mode for pyenv interaction.
:global t
:lighter ""
:keymap pyenv-mode-map
(if pyenv-mode
(add-to-list 'mode-line-misc-info pyenv-mode-mode-line-format)
(setq mode-line-misc-info
(delete pyenv-mode-mode-line-format mode-line-misc-info))))
(provide 'pyenv-mode)
;;; pyenv-mode.el ends here
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