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Program the pyenv-mode facilities myself

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Gerard Vermeulen 2022-02-13 15:10:23 +01:00
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@ -219,7 +219,6 @@ the ~custom-file~ as [[info:emacs#Saving Customizations][saving customizations (
orderless ; Emacs completion style
pdf-tools ; interactive docview replacement
pdf-view-restore ; add view history to pdf-tools
pyenv-mode ; Python environment selector
quelpa ; install Emacs packages from source
rainbow-mode ; set background color to color string
sly ; Sylvester the Cat's Common Lisp IDE
@ -2240,7 +2239,17 @@ server, before plunging into the configuring steps:
:CUSTOM_ID: sec:python-mode
:END:
Listing [[lst:configure-python]] tells the Python shell to disregard its environment
variables (in particular =PYTHONSTARTUPFILE=).
variables (in particular =PYTHONSTARTUPFILE=). The [[https://github.com/pythonic-emacs/pythonic#readme][pythonic]] and [[https://github.com/jorgenschaefer/pyvenv#readme][pyvenv]] packages
provide support to handle Python virtual environments within Emacs. The [[https://github.com/pyenv/pyenv][pyenv]]
package provides support to work with [[https://github.com/pyenv/pyenv#readme][pyenv]] (eventually with [[https://github.com/pyenv/pyenv-virtualenv#readme][pyenv-virtualenv]])
to select between different python versions (eventually each with different
environments). In the end, all those packages do is to set
=python-shell-virtualenv-root= (in case of [[https://github.com/pyenv/pyenv#readme][pyenv]] and [[https://github.com/pythonic-emacs/pythonic#readme][pythonic]]) and tweak the
environment variables and restart the relevant Python child processes (in case
of [[https://github.com/jorgenschaefer/pyvenv#readme][pyvenv]]). Therefore, this setup replaces those packages with listing
[[lst:manage-pyenv]] to manage [[https://github.com/pyenv/pyenv#readme][pyenv]] from within Emacs and listing
[[lst:setting-python-shell-virtualenv-root]] to set
=python-shell-virtualenv-root=.
#+caption[Configure =python=]:
#+caption: Configure =python=.
@ -2252,22 +2261,88 @@ variables (in particular =PYTHONSTARTUPFILE=).
'(python-shell-interpreter-args "-i -E")))
#+end_src
*** [[https://github.com/pyenv/pyenv][Pyenv]]
:PROPERTIES:
:CUSTOM_ID: sec:pyenv
:END:
Listing [[lst:enable-pyenv-mode]] configures and enables =pyenv-mode=.
#+caption[Enable =pyenv-mode=]:
#+caption: Enable =pyenv-mode=.
#+name: lst:enable-pyenv-mode
#+caption[Manage =pyenv=]:
#+caption: Manage =pyenv=.
#+name: lst:manage-pyenv
#+begin_src emacs-lisp
(when (and (executable-find "pyenv")
(require 'pyenv-mode nil 'noerror))
(pyenv-mode +1)
(pyenv-mode-set "3.9.10/envs/python-3.9.10")
;; Stop shadowing the org-mode-map "C-c C-s" binding.
(define-key pyenv-mode-map (kbd "C-c C-s") nil))
(when (executable-find "pyenv")
(defun pyenv-full-path (version)
"Return the full path for VERSION."
(unless (string= version "system")
(concat (pyenv-root) (file-name-as-directory "versions") version)))
(defun pyenv-root ()
"Return \"pyenv root\" as a directory."
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code "pyenv" "root")
(if (= 0 exit-code) (file-name-as-directory (string-trim output))
(error "%s" (string-trim output)))))
(defun pyenv-version-name ()
"Return \"pyenv version-name\"."
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code "pyenv" "version-name")
(if (= 0 exit-code) (string-trim output)
(error "%s" (string-trim output)))))
(defun pyenv-versions ()
"Return \"pyenv versions --bare --skip-aliases\" as a list.
Complete the result with \"system\"."
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code
"pyenv" "versions" "--bare" "--skip-aliases")
(if (= 0 exit-code) (cons "system" (split-string output))
(error "%s" (string-trim output)))))
(defun pyenv-virtualenvs ()
"Return \"pyenv virtualenvs --bare --skip-aliases\" as a list."
(cl-destructuring-bind (exit-code output)
(shell-command-with-exit-code
"pyenv" "virtualenvs" "--bare" "--skip-aliases")
(if (= 0 exit-code) (split-string output)
(error "%s" (string-trim output))))))
#+end_src
#+caption[Setting =python-shell-virtualenv-root=]:
#+caption: Setting =python-shell-virtualenv-root=.
#+name: lst:setting-python-shell-virtualenv-root
#+begin_src emacs-lisp
(with-eval-after-load 'python
(when (cl-every #'fboundp '(pyenv-full-path
pyenv-version-name
pyenv-versions
pyenv-virtualenvs))
(setq python-shell-virtualenv-root
(pyenv-full-path (or (car (pyenv-virtualenvs))
(car (pyenv-versions)))))
(message "Now `python-shell-virtualenv-root' equals \"%s\""
python-shell-virtualenv-root)
(defun set-python-shell-virtualenv-root-to-pyenv-version ()
"Set `python-shell-virtual-env-root' to a pyenv version."
(interactive)
(let* ((version-name (pyenv-version-name))
(prompt (format "pyenv version (%s): " version-name))
(choices (pyenv-versions))
(version (completing-read prompt choices nil 'require-match)))
(unless (string= version-name version)
(setq python-shell-virtualenv-root (pyenv-full-path version))
(setenv "PYENV_VERSION" version))
(message "Now `python-shell-virtualenv-root' equals \"%s\""
python-shell-virtualenv-root)))
(defun set-python-shell-virtualenv-root-to-pyenv-virtualenv ()
"Set `python-shell-virtual-env-root' to a pyenv virtualenv."
(interactive)
(let* ((version-name (pyenv-version-name))
(prompt (format "pyenv virtualenv (%s): " version-name))
(choices (pyenv-virtualenvs))
(version (completing-read prompt choices nil 'require-match)))
(unless (string= version-name version)
(setq python-shell-virtualenv-root (pyenv-full-path version))
(setenv "PYENV_VERSION" version))
(message "Now `python-shell-virtualenv-root' equals \"%s\""
python-shell-virtualenv-root)))))
#+end_src
*** [[https://github.com/joaotavora/eglot][Eglot]]