forked from jorgenschaefer/pyvenv
-
Notifications
You must be signed in to change notification settings - Fork 0
/
pyvenv.el
656 lines (558 loc) · 25.6 KB
/
pyvenv.el
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
;;; pyvenv.el --- Python virtual environment interface -*- lexical-binding: t -*-
;; Copyright (C) 2013-2017 Jorgen Schaefer <[email protected]>
;; Author: Jorgen Schaefer <[email protected]>
;; URL: http://github.com/jorgenschaefer/pyvenv
;; Version: 1.21
;; Keywords: Python, Virtualenv, Tools
;; 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
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This is a simple global minor mode which will replicate the changes
;; done by virtualenv activation inside Emacs.
;; The main entry points are `pyvenv-activate', which queries the user
;; for a virtual environment directory to activate, and
;; `pyvenv-workon', which queries for a virtual environment in
;; $WORKON_HOME (from virtualenvwrapper.sh).
;; If you want your inferior Python processes to be restarted
;; automatically when you switch your virtual environment, add
;; `pyvenv-restart-python' to `pyvenv-post-activate-hooks'.
;;; Code:
(require 'eshell)
(require 'json)
(require 'subr-x)
;; User customization
(defgroup pyvenv nil
"Python Virtual Environment Interface."
:prefix "pyvenv-"
:group 'languages)
(defcustom pyvenv-workon nil
"The intended virtualenv in the virtualenvwrapper directory.
This is rarely useful to set globally. Rather, set this in file-
or directory-local variables using \\[add-file-local-variable] or
\\[add-dir-local-variable].
When `pyvenv-mode' is enabled, pyvenv will switch to this
virtualenv. If a virtualenv is already enabled, it will ask first."
:type 'pyvenv-workon
:safe #'stringp
:group 'pyvenv)
(defcustom pyvenv-activate nil
"The intended virtualenv directory.
This is rarely useful to set globally. Rather, set this in file-
or directory-local variables using \\[add-file-local-variable] or
\\[add-dir-local-variable].
When `pyvenv-mode' is enabled, pyvenv will switch to this
virtualenv. If a virtualenv is already enabled, it will ask first."
:type 'directory
:safe #'stringp
:group 'pyvenv)
(defcustom pyvenv-poetry nil
"Location of poetry.
When `pyvenv-mode' is enabled, pyvenv will switch to this
virtualenv. If a virtualenv is already enabled, it will ask first."
:type 'directory
:safe #'stringp
:group 'pyvenv)
(defcustom pyvenv-tracking-ask-before-change nil
"Non-nil means pyvenv will ask before automatically changing a virtualenv.
This can happen when a new file is opened with a buffer-local
value (from file-local or directory-local variables) for
`pyvenv-workon' or `pyvenv-workon', or if `pyvenv-tracking-mode'
is active, after every command."
:type 'boolean
:group 'pyvenv)
(defcustom pyvenv-virtualenvwrapper-python
(or (getenv "VIRTUALENVWRAPPER_PYTHON")
(executable-find "python3")
(executable-find "python")
(executable-find "py")
(executable-find "pythonw")
"python")
"The python process which has access to the virtualenvwrapper module.
This should be $VIRTUALENVWRAPPER_PYTHON outside of Emacs, but
virtualenvwrapper.sh does not export that variable. We make an
educated guess, but that can be off."
:type '(file :must-match t)
:safe #'file-directory-p
:group 'pyvenv)
(defcustom pyvenv-exec-shell
(or (executable-find "bash")
(executable-find "sh")
shell-file-name)
"The path to a POSIX compliant shell to use for running
virtualenv hooks. Useful if you use a non-POSIX shell (e.g.
fish)."
:type '(file :must-match t)
:group 'pyvenv)
(defcustom pyvenv-default-virtual-env-name nil
"Default directory to use when prompting for a virtualenv directory
in `pyvenv-activate'."
:type 'string
:group 'pyvenv)
;; API for other libraries
(defvar pyvenv-virtual-env nil
"The current virtual environment.
Do not set this variable directly; use `pyvenv-activate' or
`pyvenv-workon'.")
(defvar pyvenv-virtual-env-path-directories nil
"Directories added to PATH by the current virtual environment.
Do not set this variable directly; use `pyvenv-activate' or
`pyvenv-workon'.")
(defvar pyvenv-virtual-env-name nil
"The name of the current virtual environment.
This is usually the base name of `pyvenv-virtual-env'.")
(defvar pyvenv-pre-create-hooks nil
"Hooks run before a virtual environment is created.")
(defvar pyvenv-post-create-hooks nil
"Hooks run after a virtual environment is created.")
(defvar pyvenv-pre-activate-hooks nil
"Hooks run before a virtual environment is activated.
`pyvenv-virtual-env' is already set.")
(defvar pyvenv-post-activate-hooks nil
"Hooks run after a virtual environment is activated.
`pyvenv-virtual-env' is set.")
(defvar pyvenv-pre-deactivate-hooks nil
"Hooks run before a virtual environment is deactivated.
`pyvenv-virtual-env' is set.")
(defvar pyvenv-post-deactivate-hooks nil
"Hooks run after a virtual environment is deactivated.
`pyvenv-virtual-env' is still set.")
(defvar pyvenv-mode-line-indicator '(pyvenv-virtual-env-name
("[" pyvenv-virtual-env-name "] "))
"How `pyvenv-mode' will indicate the current environment in the mode line.")
;; Internal code.
(defvar pyvenv-old-process-environment nil
"The old process environment that needs to be restored after deactivating the current environment.")
(defun pyvenv-create (venv-name python-executable)
"Create virtualenv. VENV-NAME PYTHON-EXECUTABLE."
(interactive (list
(read-from-minibuffer "Name of virtual environment: ")
(let ((dir (if pyvenv-virtualenvwrapper-python
(file-name-directory pyvenv-virtualenvwrapper-python)
nil))
(initial (if pyvenv-virtualenvwrapper-python
(file-name-base pyvenv-virtualenvwrapper-python)
nil)))
(read-file-name "Python interpreter to use: " dir nil nil initial))))
(let ((venv-dir (concat (file-name-as-directory (pyvenv-workon-home))
venv-name)))
(unless (file-exists-p venv-dir)
(run-hooks 'pyvenv-pre-create-hooks)
(cond
((executable-find "virtualenv")
(with-current-buffer (generate-new-buffer "*virtualenv*")
(call-process "virtualenv" nil t t
"-p" python-executable venv-dir)
(display-buffer (current-buffer))))
((= 0 (call-process python-executable nil nil nil
"-m" "venv" "-h"))
(with-current-buffer (generate-new-buffer "*venv*")
(call-process python-executable nil t t
"-m" "venv" venv-dir)
(display-buffer (current-buffer))))
(t
(error "Pyvenv necessitates the 'virtualenv' python package")))
(run-hooks 'pyvenv-post-create-hooks))
(pyvenv-activate venv-dir)))
;;;###autoload
(defun pyvenv-activate (directory)
"Activate the virtual environment in DIRECTORY."
(interactive (list (read-directory-name "Activate venv: " nil nil nil
pyvenv-default-virtual-env-name)))
(setq directory (expand-file-name directory))
(pyvenv-deactivate)
(setq pyvenv-virtual-env (file-name-as-directory directory)
pyvenv-virtual-env-name (file-name-nondirectory
(directory-file-name directory))
python-shell-virtualenv-path directory
python-shell-virtualenv-root directory)
;; Set venv name as parent directory for generic directories or for
;; the user's default venv name
(when (or (member pyvenv-virtual-env-name '("venv" ".venv" "env" ".env"))
(and pyvenv-default-virtual-env-name
(string= pyvenv-default-virtual-env-name
pyvenv-virtual-env-name)))
(setq pyvenv-virtual-env-name
(file-name-nondirectory
(directory-file-name
(file-name-directory
(directory-file-name directory))))))
(pyvenv-run-virtualenvwrapper-hook "pre_activate" nil pyvenv-virtual-env)
(run-hooks 'pyvenv-pre-activate-hooks)
(setq pyvenv-virtual-env-path-directories (pyvenv--virtual-env-bin-dirs directory)
;; Variables that must be reset during deactivation.
pyvenv-old-process-environment (list (cons "PYTHONHOME" (getenv "PYTHONHOME"))
(cons "VIRTUAL_ENV" nil)))
(setenv "VIRTUAL_ENV" directory)
(setenv "PYTHONHOME" nil)
(pyvenv--add-dirs-to-PATH pyvenv-virtual-env-path-directories)
(pyvenv-run-virtualenvwrapper-hook "post_activate" 'propagate-env)
(run-hooks 'pyvenv-post-activate-hooks))
;;;###autoload
(defun pyvenv-deactivate ()
"Deactivate any current virtual environment."
(interactive)
(when pyvenv-virtual-env
(pyvenv-run-virtualenvwrapper-hook "pre_deactivate" 'propagate-env)
(run-hooks 'pyvenv-pre-deactivate-hooks)
(pyvenv--remove-dirs-from-PATH (pyvenv--virtual-env-bin-dirs pyvenv-virtual-env))
(dolist (envvar pyvenv-old-process-environment)
(setenv (car envvar) (cdr envvar)))
;; Make sure PROPAGATE-ENV is nil here, so that it does not change
;; `exec-path', as $PATH is different
(pyvenv-run-virtualenvwrapper-hook "post_deactivate"
nil
pyvenv-virtual-env)
(run-hooks 'pyvenv-post-deactivate-hooks))
(setq pyvenv-virtual-env nil
pyvenv-virtual-env-path-directories nil
pyvenv-virtual-env-name nil
python-shell-virtualenv-root nil
python-shell-virtualenv-path nil))
(defvar pyvenv-workon-history nil
"Prompt history for `pyvenv-workon'.")
;;;###autoload
(defun pyvenv-workon (name)
"Activate a virtual environment from $WORKON_HOME.
If the virtual environment NAME is already active, this function
does not try to reactivate the environment."
(interactive
(list
(completing-read "Work on: " (pyvenv-virtualenv-list)
nil t nil 'pyvenv-workon-history nil nil)))
(unless (member name (list "" nil pyvenv-virtual-env-name))
(pyvenv-activate (format "%s/%s"
(pyvenv-workon-home)
name))))
(defun pyvenv-virtualenv-list (&optional noerror)
"Prompt the user for a name in $WORKON_HOME.
If NOERROR is set, do not raise an error if WORKON_HOME is not
configured."
(let ((workon-home (pyvenv-workon-home))
(result nil))
(if (not (file-directory-p workon-home))
(when (not noerror)
(error "Can't find a workon home directory, set $WORKON_HOME"))
(dolist (name (directory-files workon-home))
(when (or (file-exists-p (format "%s/%s/bin/activate"
workon-home name))
(file-exists-p (format "%s/%s/bin/python"
workon-home name))
(file-exists-p (format "%s/%s/Scripts/activate.bat"
workon-home name))
(file-exists-p (format "%s/%s/python.exe"
workon-home name)))
(setq result (cons name result))))
(sort result (lambda (a b)
(string-lessp (downcase a)
(downcase b)))))))
(define-widget 'pyvenv-workon 'choice
"Select an available virtualenv from virtualenvwrapper."
:convert-widget
(lambda (widget)
(setq widget (widget-copy widget))
(widget-put widget
:args (cons '(const :tag "None" nil)
(mapcar (lambda (env)
(list 'const env))
(pyvenv-virtualenv-list t))))
(widget-types-convert-widget widget))
:prompt-value (lambda (_widget prompt _value _unbound)
(let ((name (completing-read
prompt
(cons "None"
(pyvenv-virtualenv-list t))
nil t)))
(if (equal name "None")
nil
name))))
(defvar pyvenv-mode-map (make-sparse-keymap)
"The mode keymap for `pyvenv-mode'.")
(easy-menu-define pyvenv-menu pyvenv-mode-map
"Pyvenv Menu"
'("Virtual Envs"
:visible pyvenv-mode
("Workon"
:help "Activate a virtualenvwrapper environment"
:filter (lambda (&optional ignored)
(mapcar (lambda (venv)
(vector venv `(pyvenv-workon ,venv)
:style 'radio
:selected `(equal pyvenv-virtual-env-name
,venv)))
(pyvenv-virtualenv-list t))))
["Activate" pyvenv-activate
:help "Activate a virtual environment by directory"]
["Deactivate" pyvenv-deactivate
:help "Deactivate the current virtual environment"
:active pyvenv-virtual-env
:suffix pyvenv-virtual-env-name]
["Restart Python Processes" pyvenv-restart-python
:help "Restart all Python processes to use the current environment"]))
;;;###autoload
(define-minor-mode pyvenv-mode
"Global minor mode for pyvenv.
Will show the current virtualenv in the mode line, and respect a
`pyvenv-workon' setting in files."
:global t
(cond
(pyvenv-mode
(add-to-list 'mode-line-misc-info '(pyvenv-mode pyvenv-mode-line-indicator))
(add-hook 'hack-local-variables-hook #'pyvenv-track-virtualenv))
((not pyvenv-mode)
(setq mode-line-misc-info (delete '(pyvenv-mode pyvenv-mode-line-indicator)
mode-line-misc-info))
(remove-hook 'hack-local-variables-hook #'pyvenv-track-virtualenv))))
;;;###autoload
(define-minor-mode pyvenv-tracking-mode
"Global minor mode to track the current virtualenv.
When this mode is active, pyvenv will activate a buffer-specific
virtualenv whenever the user switches to a buffer with a
buffer-local `pyvenv-workon' or `pyvenv-activate' variable."
:global t
(if pyvenv-tracking-mode
(add-hook 'post-command-hook 'pyvenv-track-virtualenv)
(remove-hook 'post-command-hook 'pyvenv-track-virtualenv)))
(defun pyvenv-poetry-active-virtualenv ()
"Get current active poetry environment."
(with-temp-buffer
(if (= 0 (call-process-shell-command (concat "/usr/bin/python3" " " pyvenv-poetry " env list") nil t))
(catch 'poetry_environment
(dolist (line (split-string (buffer-string) "\n"))
(if (string-match ".*(Activated)" line)
(throw 'poetry_environment (car (split-string line)))))))))
(defun pyvenv-track-virtualenv ()
"Set a virtualenv as specified for the current buffer.
If either `pyvenv-activate' or `pyvenv-workon' are specified, and
they specify a virtualenv different from the current one, switch
to that virtualenv."
(cond
(pyvenv-activate
(when (and (not (equal (file-name-as-directory pyvenv-activate)
pyvenv-virtual-env))
(or (not pyvenv-tracking-ask-before-change)
(y-or-n-p (format "Switch to virtualenv %s (currently %s)"
pyvenv-activate pyvenv-virtual-env))))
(pyvenv-activate pyvenv-activate)))
(pyvenv-workon
(when (and (not (equal pyvenv-workon pyvenv-virtual-env-name))
(or (not pyvenv-tracking-ask-before-change)
(y-or-n-p (format "Switch to virtualenv %s (currently %s)"
pyvenv-workon pyvenv-virtual-env-name))))
(pyvenv-workon pyvenv-workon)))
(pyvenv-poetry (let ((poetry-environment (pyvenv-poetry-active-virtualenv)))
(if poetry-environment
(pyvenv-workon poetry-environment))))))
(defun pyvenv-run-virtualenvwrapper-hook (hook &optional propagate-env &rest args)
"Run a virtualenvwrapper hook, and update the environment.
This will run a virtualenvwrapper hook and update the local
environment accordingly.
CAREFUL! If PROPAGATE-ENV is non-nil, this will modify your
`process-environment' and `exec-path'."
(when (pyvenv-virtualenvwrapper-supported)
(with-temp-buffer
(let ((tmpfile (make-temp-file "pyvenv-virtualenvwrapper-"))
(shell-file-name pyvenv-exec-shell))
(unwind-protect
(let ((default-directory (pyvenv-workon-home)))
(apply #'call-process
pyvenv-virtualenvwrapper-python
nil t nil
"-m" "virtualenvwrapper.hook_loader"
"--script" tmpfile
(if (getenv "HOOK_VERBOSE_OPTION")
(cons (getenv "HOOK_VERBOSE_OPTION")
(cons hook args))
(cons hook args)))
(call-process-shell-command
(mapconcat 'identity
(list
(format "%s -c 'import os, json; print(json.dumps(dict(os.environ)))'"
pyvenv-virtualenvwrapper-python)
(format ". '%s'" tmpfile)
(format
"%s -c 'import os, json; print(\"\\n=-=-=\"); print(json.dumps(dict(os.environ)))'"
pyvenv-virtualenvwrapper-python))
"; ")
nil t nil))
(delete-file tmpfile)))
(goto-char (point-min))
(when (not (re-search-forward "No module named '?virtualenvwrapper'?" nil t))
(let* ((json-key-type 'string)
(env-before (json-read))
(hook-output-start-pos (point))
(hook-output-end-pos (when (re-search-forward "\n=-=-=\n" nil t)
(match-beginning 0)))
(env-after (when hook-output-end-pos (json-read))))
(when hook-output-end-pos
(let ((output (string-trim (buffer-substring hook-output-start-pos
hook-output-end-pos))))
(when (> (length output) 0)
(with-help-window "*Virtualenvwrapper Hook Output*"
(with-current-buffer "*Virtualenvwrapper Hook Output*"
(let ((inhibit-read-only t))
(erase-buffer)
(insert
(format
"Output from the virtualenvwrapper hook %s:\n\n"
hook)
output))))))
(when propagate-env
(dolist (binding (pyvenv--env-diff (sort env-before (lambda (x y) (string-lessp (car x) (car y))))
(sort env-after (lambda (x y) (string-lessp (car x) (car y))))))
(setenv (car binding) (cdr binding))
(when (eq (car binding) 'PATH)
(let ((new-path-elts (split-string (cdr binding)
path-separator)))
(setq exec-path new-path-elts)
(setq-default eshell-path-env new-path-elts)))))))))))
(defun pyvenv--env-diff (env-before env-after)
"Calculate diff between ENV-BEFORE alist and ENV-AFTER alist.
Both ENV-BEFORE and ENV-AFTER must be sorted alists of (STR . STR)."
(let (env-diff)
(while (or env-before env-after)
(cond
;; K-V are the same, both proceed to the next one.
((equal (car-safe env-before) (car-safe env-after))
(setq env-before (cdr env-before)
env-after (cdr env-after)))
;; env-after is missing one element: add (K-before . nil) to diff
((and env-before (or (null env-after) (string-lessp (caar env-before)
(caar env-after))))
(setq env-diff (cons (cons (caar env-before) nil) env-diff)
env-before (cdr env-before)))
;; Otherwise: add env-after element to the diff, progress env-after,
;; progress env-before only if keys matched.
(t
(setq env-diff (cons (car env-after) env-diff))
(when (equal (caar env-after) (caar env-before))
(setq env-before (cdr env-before)))
(setq env-after (cdr env-after)))))
(nreverse env-diff)))
;;;###autoload
(defun pyvenv-restart-python ()
"Restart Python inferior processes."
(interactive)
(dolist (buf (buffer-list))
(with-current-buffer buf
(when (and (eq major-mode 'inferior-python-mode)
(get-buffer-process buf))
(let ((cmd (combine-and-quote-strings (process-command
(get-buffer-process buf))))
(dedicated (if (string-match "\\[.*\\]$" (buffer-name buf))
t
nil))
(show nil))
(delete-process (get-buffer-process buf))
(goto-char (point-max))
(insert "\n\n"
"###\n"
(format "### Restarting in virtualenv %s (%s)\n"
pyvenv-virtual-env-name pyvenv-virtual-env)
"###\n"
"\n\n")
(run-python cmd dedicated show)
(goto-char (point-max)))))))
(defun pyvenv-hook-dir ()
"Return the current hook directory.
This is usually the value of $VIRTUALENVWRAPPER_HOOK_DIR, but
virtualenvwrapper has stopped exporting that variable, so we go
back to the default of $WORKON_HOME or even just ~/.virtualenvs/."
(or (getenv "VIRTUALENVWRAPPER_HOOK_DIR")
(pyvenv-workon-home)))
(defun pyvenv-workon-home ()
"Return the current workon home.
This is the value of $WORKON_HOME or ~/.virtualenvs."
(or (getenv "WORKON_HOME")
(expand-file-name "~/.virtualenvs")))
(defun pyvenv-virtualenvwrapper-supported ()
"Return true iff virtualenvwrapper is supported.
Right now, this just checks if WORKON_HOME is set."
(getenv "WORKON_HOME"))
(defun pyvenv--virtual-env-bin-dirs (virtual-env)
(let ((virtual-env
(if (string= "/" (directory-file-name virtual-env))
""
(directory-file-name virtual-env))))
(append
;; Unix
(when (file-exists-p (format "%s/bin" virtual-env))
(list (format "%s/bin" virtual-env)))
;; Windows
(when (file-exists-p (format "%s/Scripts" virtual-env))
(list (format "%s/Scripts" virtual-env)
;; Apparently, some virtualenv
;; versions on windows put the
;; python.exe in the virtualenv root
;; for some reason?
virtual-env)))))
(defun pyvenv--replace-once-destructive (list oldvalue newvalue)
"Replace one element equal to OLDVALUE with NEWVALUE values in LIST."
(let ((cur-elt list))
(while (and cur-elt (not (equal oldvalue (car cur-elt))))
(setq cur-elt (cdr cur-elt)))
(when cur-elt (setcar cur-elt newvalue))))
(defun pyvenv--remove-many-once (values-to-remove list)
"Return a copy of LIST with each element from VALUES-TO-REMOVE removed once."
;; Non-interned symbol is not eq to anything but itself.
(let ((values-to-remove (copy-sequence values-to-remove))
(sentinel (make-symbol "sentinel")))
(delq sentinel
(mapcar (lambda (x)
(if (pyvenv--replace-once-destructive values-to-remove x sentinel)
sentinel
x))
list))))
(defun pyvenv--prepend-to-pathsep-string (values-to-prepend str)
"Prepend values from VALUES-TO-PREPEND list to path-delimited STR."
(mapconcat 'identity
(append values-to-prepend (split-string str path-separator))
path-separator))
(defun pyvenv--remove-from-pathsep-string (values-to-remove str)
"Remove all values from VALUES-TO-REMOVE list from path-delimited STR."
(mapconcat 'identity
(pyvenv--remove-many-once values-to-remove (split-string str path-separator))
path-separator))
(defun pyvenv--add-dirs-to-PATH (dirs-to-add)
"Add DIRS-TO-ADD to different variables related to execution paths."
(let* ((new-eshell-path-env (pyvenv--prepend-to-pathsep-string dirs-to-add (default-value 'eshell-path-env)))
(new-path-envvar (pyvenv--prepend-to-pathsep-string dirs-to-add (getenv "PATH"))))
(setq exec-path (append dirs-to-add exec-path))
(setq-default eshell-path-env new-eshell-path-env)
(setenv "PATH" new-path-envvar)))
(defun pyvenv--remove-dirs-from-PATH (dirs-to-remove)
"Remove DIRS-TO-REMOVE from different variables related to execution paths."
(let* ((new-eshell-path-env (pyvenv--remove-from-pathsep-string dirs-to-remove (default-value 'eshell-path-env)))
(new-path-envvar (pyvenv--remove-from-pathsep-string dirs-to-remove (getenv "PATH"))))
(setq exec-path (pyvenv--remove-many-once dirs-to-remove exec-path))
(setq-default eshell-path-env new-eshell-path-env)
(setenv "PATH" new-path-envvar)))
;;; Compatibility
(when (not (fboundp 'file-name-base))
;; Emacs 24.3
(defun file-name-base (&optional filename)
"Return the base name of the FILENAME: no directory, no extension.
FILENAME defaults to `buffer-file-name'."
(file-name-sans-extension
(file-name-nondirectory (or filename (buffer-file-name)))))
)
(when (not (boundp 'mode-line-misc-info))
(defvar mode-line-misc-info nil
"Compatibility variable for 24.3+")
(let ((line mode-line-format))
(while line
(when (eq 'which-func-mode
(car-safe (car-safe (cdr line))))
(setcdr line (cons 'mode-line-misc-format
(cdr line)))
(setq line (cdr line)))
(setq line (cdr line)))))
(provide 'pyvenv)
;;; pyvenv.el ends here