forked from jorgenschaefer/elpy
-
Notifications
You must be signed in to change notification settings - Fork 0
/
elpy-shell.el
1390 lines (1221 loc) · 56.5 KB
/
elpy-shell.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
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
;;; elpy-shell.el --- Interactive Python support for elpy -*- lexical-binding: t -*-
;;
;; Copyright (C) 2012-2019 Jorgen Schaefer
;;
;; Author: Jorgen Schaefer <[email protected]>, Rainer Gemulla <[email protected]>, Gaby Launay <[email protected]>
;; URL: https://github.com/jorgenschaefer/elpy
;;
;; 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:
;;
;; Adds support for interactive Python to elpy
;;
;;; Code:
(eval-when-compile (require 'subr-x))
(require 'python)
;;;;;;;;;;;;;;;;;;;;;;
;;; User customization
(defcustom elpy-dedicated-shells nil
"Non-nil if Elpy should use dedicated shells.
Elpy can use a unique Python shell for all buffers and support
manually started dedicated shells. Setting this option to non-nil
force the creation of dedicated shells for each buffers."
:type 'boolean
:group 'elpy)
(make-obsolete-variable 'elpy-dedicated-shells
"Dedicated shells are no longer supported by Elpy.
You can use `(add-hook 'elpy-mode-hook (lambda () (elpy-shell-toggle-dedicated-shell 1)))' to achieve the same result."
"1.17.0")
(defcustom elpy-shell-display-buffer-after-send nil ;
"Whether to display the Python shell after sending something to it."
:type 'boolean
:group 'elpy)
(defcustom elpy-shell-echo-output 'when-shell-not-visible
"Whether to echo the Python shell output in the echo area after input has been sent to the shell.
Possible choices are nil (=never), `when-shell-not-visible', or
t (=always)."
:type '(choice (const :tag "Never" nil)
(const :tag "When shell not visible" when-shell-not-visible)
(const :tag "Always" t))
:group 'elpy)
(defcustom elpy-shell-capture-last-multiline-output t
"Whether to capture the output of the last Python statement when sending multiple statements to the Python shell.
If nil, no output is captured (nor echoed in the shell) when
sending multiple statements. This is the default behavior of
python.el. If non-nil and the last statement is an expression,
captures its output so that it is echoed in the shell."
:type 'boolean
:group 'elpy)
(make-obsolete-variable 'elpy-shell-capture-last-multiline-output
"The last multiline output is now always captured."
"February 2019")
(defcustom elpy-shell-echo-input t
"Whether to echo input sent to the Python shell as input in the
shell buffer.
Truncation of long inputs can be controlled via
`elpy-shell-echo-input-lines-head' and
`elpy-shell-echo-input-lines-tail'."
:type 'boolean
:group 'elpy)
(defcustom elpy-shell-echo-input-cont-prompt t
"Whether to show a continuation prompt when echoing multi-line
input to the Python shell."
:type 'boolean
:group 'elpy)
(defcustom elpy-shell-echo-input-lines-head 10
"Maximum number of lines to show before truncating input echoed
in the Python shell."
:type 'integer
:group 'elpy)
(defcustom elpy-shell-echo-input-lines-tail 10
"Maximum number of lines to show after truncating input echoed
in the Python shell."
:type 'integer
:group 'elpy)
(defcustom elpy-shell-starting-directory 'project-root
"Directory in which Python shells will be started.
Can be `project-root' (default) to use the current project root,
`current-directory' to use the buffer current directory, or a
string indicating a specific path.
\\<elpy-mode-map>
Running python interpeters need to be restarted (with
\\[elpy-shell-kill] followed by \\[elpy-shell-switch-to-shell]) for
this option to be taken into account."
:type '(choice (const :tag "Project root" project-root)
(const :tag "Current directory" current-directory)
(string :tag "Specific directory"))
:group 'elpy)
(defcustom elpy-shell-use-project-root t
"Whether to use project root as default directory when starting a Python shells.
The project root is determined using `elpy-project-root`. If this
variable is set to nil, the current directory is used instead."
:type 'boolean
:group 'elpy)
(make-obsolete-variable 'elpy-shell-use-project-root
'elpy-shell-starting-directory
"1.32.0")
(defcustom elpy-shell-cell-boundary-regexp
(concat "^\\(?:"
"##.*" "\\|"
"#\\s-*<.+>" "\\|"
"#\\s-*\\(?:In\\|Out\\)\\[.*\\]:"
"\\)\\s-*$")
"Regular expression for matching a line indicating the boundary
of a cell (beginning or ending). By default, lines starting with
``##`` are treated as a cell boundaries, as are the boundaries in
Python files exported from IPython or Jupyter notebooks (e.g.,
``# <markdowncell>``, ``# In[1]:'', or ``# Out[1]:``).
Note that `elpy-shell-cell-beginning-regexp' must also match
the first boundary of the code cell."
:type 'string
:group 'elpy)
(defcustom elpy-shell-codecell-beginning-regexp
(concat "^\\(?:"
"##.*" "\\|"
"#\\s-*<codecell>" "\\|"
"#\\s-*In\\[.*\\]:"
"\\)\\s-*$")
"Regular expression for matching a line indicating the
beginning of a code cell. By default, lines starting with ``##``
are treated as beginnings of a code cell, as are the code cell
beginnings (and only the code cell beginnings) in Python files
exported from IPython or Jupyter notebooks (e.g., ``#
<codecell>`` or ``# In[1]:``).
Note that `elpy-shell-cell-boundary-regexp' must also match
the code cell beginnings defined here."
:type 'string
:group 'elpy)
(defcustom elpy-shell-add-to-shell-history nil
"If Elpy should make the code sent to the shell available in the
shell history. This allows to use `comint-previous-input' in the
python shell to get back the pieces of code sent by Elpy. This affects
the following functions:
- `elpy-shell-send-statement'
- `elpy-shell-send-top-statement'
- `elpy-shell-send-group'
- `elpy-shell-send-codecell'
- `elpy-shell-send-region-or-buffer'."
:type 'boolean
:group 'elpy)
(defcustom elpy-shell-darwin-use-pty nil
"Whether to connect to the Python shell through pty on MacOS.
If nil, Elpy will connect to Python through a pipe. Any non-nil
value will cause Elpy use a pseudo-terminal (pty) instead. This
value should be set to nil when using a Python interpreter that
uses the libedit version of Readline, such as the default MacOS
Python interpreters. This value can be safely be set to true when
using a version of Python that uses GNU Readline.
This value is only used when `elpy-shell-get-or-create-process'
creates a new Python process."
:type 'boolean
:group 'elpy)
;;;;;;;;;;;;;;;;;;
;;; Shell commands
(defvar elpy--shell-last-py-buffer nil
"Help keep track of python buffer when changing to pyshell.")
(defun elpy-shell-display-buffer ()
"Display inferior Python process buffer."
(display-buffer (process-buffer (elpy-shell-get-or-create-process))
nil
'visible))
;; better name would be pop-to-shell
(defun elpy-shell-switch-to-shell ()
"Switch to inferior Python process buffer."
(interactive)
(setq elpy--shell-last-py-buffer (buffer-name))
(pop-to-buffer (process-buffer (elpy-shell-get-or-create-process))))
(defun elpy-shell-switch-to-buffer ()
"Switch from inferior Python process buffer to recent Python buffer."
(interactive)
(pop-to-buffer elpy--shell-last-py-buffer))
(defun elpy-shell-switch-to-shell-in-current-window ()
(interactive)
(setq elpy--shell-last-py-buffer (buffer-name))
(switch-to-buffer (process-buffer (elpy-shell-get-or-create-process))))
(defun elpy-shell-switch-to-buffer-in-current-window ()
(interactive)
(switch-to-buffer elpy--shell-last-py-buffer))
(defun elpy-shell-kill (&optional kill-buff)
"Kill the current python shell.
If KILL-BUFF is non-nil, also kill the associated buffer."
(interactive)
(let ((shell-buffer (python-shell-get-buffer)))
(cond
(shell-buffer
(delete-process shell-buffer)
(when kill-buff
(kill-buffer shell-buffer))
(message "Killed %s shell" shell-buffer))
(t
(message "No python shell to kill")))))
(defun elpy-shell-kill-all (&optional kill-buffers ask-for-each-one)
"Kill all active python shells.
If KILL-BUFFERS is non-nil, also kill the associated buffers.
If ASK-FOR-EACH-ONE is non-nil, ask before killing each python process."
(interactive)
(let ((python-buffer-list ()))
;; Get active python shell buffers and kill inactive ones (if asked)
(cl-loop for buffer being the buffers do
(when (and (buffer-name buffer)
(string-match (rx bol "*Python" (opt "[" (* (not (any "]"))) "]") "*" eol)
(buffer-name buffer)))
(if (get-buffer-process buffer)
(push buffer python-buffer-list)
(when kill-buffers
(kill-buffer buffer)))))
(cond
;; Ask for each buffers and kill
((and python-buffer-list ask-for-each-one)
(cl-loop for buffer in python-buffer-list do
(when (y-or-n-p (format "Kill %s ? " buffer))
(delete-process buffer)
(when kill-buffers
(kill-buffer buffer)))))
;; Ask and kill every buffers
(python-buffer-list
(if (y-or-n-p (format "Kill %s python shells ? " (length python-buffer-list)))
(cl-loop for buffer in python-buffer-list do
(delete-process buffer)
(when kill-buffers
(kill-buffer buffer)))))
;; No shell to close
(t
(message "No python shell to close")))))
(defun elpy-executable-find-remote (command)
"Emulate 'executable-find' REMOTE.
Since Emacs 27, 'executable-find' accepts the 2nd argument.
REMOVE THIS when Elpy no longer supports Emacs 26."
(if (cdr (help-function-arglist 'executable-find)) ; 27+
(executable-find command t)
(if (file-remote-p default-directory)
(let ((res (locate-file ; code from files.el
command
(mapcar
(lambda (x) (concat (file-remote-p default-directory) x))
(exec-path))
exec-suffixes 'file-executable-p)))
(when (stringp res) (file-local-name res)))
(executable-find command)))) ; local search
(defun elpy-shell-get-or-create-process (&optional sit)
"Get or create an inferior Python process for current buffer and return it.
If SIT is non-nil, sit for that many seconds after creating a
Python process. This allows the process to start up."
(let* ((process-connection-type
(if (string-equal system-type "darwin") elpy-shell-darwin-use-pty t)) ;; see https://github.com/jorgenschaefer/elpy/pull/1671
(bufname (format "*%s*" (python-shell-get-process-name nil)))
(proc (get-buffer-process bufname)))
(if proc
proc
(unless (elpy-executable-find-remote python-shell-interpreter)
(error "Python shell interpreter `%s' cannot be found. Please set `python-shell-interpreter' to a valid python binary."
python-shell-interpreter))
(let ((default-directory
(cond ((eq elpy-shell-starting-directory 'project-root)
(or (elpy-project-root)
default-directory))
((eq elpy-shell-starting-directory 'current-directory)
default-directory)
((stringp elpy-shell-starting-directory)
(file-name-as-directory
(expand-file-name elpy-shell-starting-directory)))
(t
(error "Wrong value for `elpy-shell-starting-directory', please check this variable documentation and set it to a proper value")))))
;; We cannot use `run-python` directly, as it selects the new shell
;; buffer. See https://github.com/jorgenschaefer/elpy/issues/1848
(python-shell-make-comint
(python-shell-parse-command)
(python-shell-get-process-name nil)
t))
(when sit (sit-for sit))
(get-buffer-process bufname))))
(defun elpy-shell--send-setup-code ()
"Send setup code for the shell."
(let ((process (python-shell-get-process)))
(when (elpy-project-root)
(python-shell-send-string-no-output
(format "import sys;sys.path.append('%s');del sys"
(elpy-project-root))
process))))
(defun elpy-shell-toggle-dedicated-shell (&optional arg)
"Toggle the use of a dedicated python shell for the current buffer.
if ARG is positive, enable the use of a dedicated shell.
if ARG is negative or 0, disable the use of a dedicated shell."
(interactive)
(let ((arg (or arg
(if (local-variable-p 'python-shell-buffer-name) 0 1))))
(if (<= arg 0)
(kill-local-variable 'python-shell-buffer-name)
(setq-local python-shell-buffer-name
(format "Python[%s]"
(file-name-sans-extension
(buffer-name)))))))
(defun elpy-shell-set-local-shell (&optional shell-name)
"Associate the current buffer to a specific shell.
Meaning that the code from the current buffer will be sent to this shell.
If SHELL-NAME is not specified, ask with completion for a shell name.
If SHELL-NAME is \"Global\", associate the current buffer to the main python
shell (often \"*Python*\" shell)."
(interactive)
(let* ((current-shell-name (if (local-variable-p 'python-shell-buffer-name)
(progn
(string-match "Python\\[\\(.*?\\)\\]"
python-shell-buffer-name)
(match-string 1 python-shell-buffer-name))
"Global"))
(shell-names (cl-loop
for buffer in (buffer-list)
for buffer-name = (file-name-sans-extension (substring-no-properties (buffer-name buffer)))
if (string-match "\\*Python\\[\\(.*?\\)\\]\\*" buffer-name)
collect (match-string 1 buffer-name)))
(candidates (remove current-shell-name
(delete-dups
(append (list (file-name-sans-extension
(buffer-name)) "Global")
shell-names))))
(prompt (format "Shell name (current: %s): " current-shell-name))
(shell-name (or shell-name (completing-read prompt candidates))))
(if (string= shell-name "Global")
(kill-local-variable 'python-shell-buffer-name)
(setq-local python-shell-buffer-name (format "Python[%s]" shell-name)))))
(defun elpy-shell--ensure-shell-running ()
"Ensure that the Python shell for the current buffer is running.
If the shell is not running, waits until the first prompt is visible and
commands can be sent to the shell."
(with-current-buffer (process-buffer (elpy-shell-get-or-create-process))
(let ((cumtime 0))
(while (and (when (boundp 'python-shell--first-prompt-received)
(not python-shell--first-prompt-received))
(< cumtime 3))
(sleep-for 0.1)
(setq cumtime (+ cumtime 0.1)))))
(elpy-shell-get-or-create-process))
(defun elpy-shell--string-without-indentation (string)
"Return the current string, but without indentation."
(if (string-empty-p string)
string
(let ((indent-level nil)
(indent-tabs-mode nil))
(with-temp-buffer
(insert string)
(goto-char (point-min))
(while (< (point) (point-max))
(cond
((or (elpy-shell--current-line-only-whitespace-p)
(python-info-current-line-comment-p)))
((not indent-level)
(setq indent-level (current-indentation)))
((and indent-level
(< (current-indentation) indent-level))
(error (message "X%sX" (thing-at-point 'line)))))
;; (error "Can't adjust indentation, consecutive lines indented less than starting line")))
(forward-line))
(indent-rigidly (point-min)
(point-max)
(- indent-level))
;; 'indent-rigidly' introduces tabs despite the fact that 'indent-tabs-mode' is nil
;; 'untabify' fix that
(untabify (point-min) (point-max))
(buffer-string)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Flash input sent to shell
;; functions for flashing a region; only flashes when package eval-sexp-fu is
;; loaded and its minor mode enabled
(defun elpy-shell--flash-and-message-region (begin end)
"Displays information about code fragments sent to the shell.
BEGIN and END refer to the region of the current buffer
containing the code being sent. Displays a message with the code
on the first line of that region. If `eval-sexp-fu-flash-mode' is
active, additionally flashes that region briefly."
(when (> end begin)
(save-excursion
(let* ((bounds
(save-excursion
(goto-char begin)
(bounds-of-thing-at-point 'line)))
(begin (max begin (car bounds)))
(end (min end (cdr bounds)))
(code-on-first-line (string-trim (buffer-substring begin end))))
(goto-char begin)
(end-of-line)
(if (<= end (point))
(message "Sent: %s" code-on-first-line)
(message "Sent: %s..." code-on-first-line))
(when (bound-and-true-p eval-sexp-fu-flash-mode)
(cl-multiple-value-bind (_bounds hi unhi _eflash)
(eval-sexp-fu-flash (cons begin end))
(eval-sexp-fu-flash-doit (lambda () t) hi unhi)))))))
;;;;;;;;;;;;;;;;;;;
;; Helper functions
(defun elpy-shell--current-line-else-or-elif-p ()
(eq (string-match-p "\\s-*el\\(?:se:\\|if[^\w]\\)" (thing-at-point 'line)) 0))
(defun elpy-shell--current-line-decorator-p ()
(eq (string-match-p "^\\s-*@[A-Za-z]" (thing-at-point 'line)) 0))
(defun elpy-shell--current-line-decorated-defun-p ()
(save-excursion (python-nav-backward-statement)
(elpy-shell--current-line-decorator-p)))
(defun elpy-shell--current-line-indented-p ()
(eq (string-match-p "\\s-+[^\\s-]+" (thing-at-point 'line)) 0))
(defun elpy-shell--current-line-only-whitespace-p ()
"Whether the current line contains only whitespace characters (or is empty)."
(eq (string-match-p "\\s-*$" (thing-at-point 'line)) 0))
(defun elpy-shell--current-line-code-line-p ()
(and (not (elpy-shell--current-line-only-whitespace-p))
(not (python-info-current-line-comment-p))))
(defun elpy-shell--current-line-defun-p ()
"Whether a function definition starts at the current line."
(eq (string-match-p
"\\s-*\\(?:def\\|async\\s-+def\\)\\s\-"
(thing-at-point 'line))
0))
(defun elpy-shell--current-line-defclass-p ()
"Whether a class definition starts at the current line."
(eq (string-match-p
"\\s-*class\\s\-"
(thing-at-point 'line))
0))
(defun elpy-shell--skip-to-next-code-line (&optional backwards)
"Move the point to the next line containing code.
If the current line has code, point is not moved. If BACKWARDS is
non-nil, skips backwards."
(if backwards
(while (and (not (elpy-shell--current-line-code-line-p))
(not (eq (point) (point-min))))
(forward-line -1))
(while (and (not (elpy-shell--current-line-code-line-p))
(not (eq (point) (point-max))))
(forward-line))))
(defun elpy-shell--check-if-shell-available ()
"Check if the associated python shell is available.
Return non-nil is the shell is running and not busy, nil otherwise."
(and (python-shell-get-process)
(with-current-buffer (process-buffer (python-shell-get-process))
(save-excursion
(goto-char (point-max))
(let ((inhibit-field-text-motion t))
(python-shell-comint-end-of-output-p
(buffer-substring (line-beginning-position)
(line-end-position))))))))
;;;;;;;;;;
;; Echoing
(defmacro elpy-shell--with-maybe-echo (body)
;; Echoing is apparently buggy for emacs < 25...
(if (<= 25 emacs-major-version)
`(elpy-shell--with-maybe-echo-output
(elpy-shell--with-maybe-echo-input
,body))
body))
(defmacro elpy-shell--with-maybe-echo-input (body)
"Run BODY so that it adheres `elpy-shell-echo-input' and `elpy-shell-display-buffer'."
`(progn
(elpy-shell--enable-echo)
(prog1
(if elpy-shell-display-buffer-after-send
(prog1 (progn ,body)
(elpy-shell-display-buffer))
(cl-flet ((elpy-shell-display-buffer () ()))
(progn ,body)))
(elpy-shell--disable-echo))))
(defvar-local elpy-shell--capture-output nil
"Non-nil when the Python shell should capture output for display in the echo area.")
(defvar-local elpy-shell--captured-output nil
"Current captured output of the Python shell.")
(defmacro elpy-shell--with-maybe-echo-output (body)
"Run BODY and grab shell output according to `elpy-shell-echo-output'."
`(cl-letf (((symbol-function 'python-shell-send-file)
(if elpy-shell-echo-output
(symbol-function 'elpy-shell-send-file)
(symbol-function 'python-shell-send-file))))
(let* ((process (elpy-shell--ensure-shell-running))
(process-buf (process-buffer process))
(shell-visible (or elpy-shell-display-buffer-after-send
(get-buffer-window process-buf))))
(with-current-buffer process-buf
(setq-local elpy-shell--capture-output
(and elpy-shell-echo-output
(or (not (eq elpy-shell-echo-output 'when-shell-not-visible))
(not shell-visible)))))
(progn ,body))))
(defun elpy-shell--enable-output-filter ()
(add-hook 'comint-output-filter-functions 'elpy-shell--output-filter nil t))
(defun elpy-shell--output-filter (string)
"Filter used in `elpy-shell--with-maybe-echo-output' to grab output.
No actual filtering is performed. STRING is the output received
to this point from the process. If `elpy-shell--capture-output'
is set, captures and messages shell output in the echo area (once
complete). Otherwise, does nothing."
;; capture the output and message it when complete
(when elpy-shell--capture-output
;; remember the new output
(setq-local elpy-shell--captured-output
(concat elpy-shell--captured-output (ansi-color-filter-apply string)))
;; Output ends when `elpy-shell--captured-output' contains
;; the prompt attached at the end of it. If so, message it.
(when (python-shell-comint-end-of-output-p elpy-shell--captured-output)
(let ((output (substring
elpy-shell--captured-output
0 (match-beginning 0)))
(message-log-max))
(if (string-match-p "Traceback (most recent call last):" output)
(message "Exception during evaluation.")
(if (string-empty-p output)
(message "No output was produced.")
(message "%s" (replace-regexp-in-string "\n\\'" "" output))))
(setq-local elpy-shell--captured-output nil))))
;; return input unmodified
string)
(defun elpy-shell--insert-and-font-lock (string face &optional no-font-lock)
"Inject STRING into the Python shell buffer."
(let ((from-point (point)))
(insert string)
(if (not no-font-lock)
(add-text-properties from-point (point)
(list 'front-sticky t 'font-lock-face face)))))
(defun elpy-shell--append-to-shell-output (string &optional no-font-lock prepend-cont-prompt)
"Append the given STRING to the output of the Python shell buffer.
Unless NO-FONT-LOCK is set, formats STRING as shell input.
Prepends a continuation promt if PREPEND-CONT-PROMPT is set."
(unless (string-empty-p string)
(let* ((process (elpy-shell-get-or-create-process))
(process-buf (process-buffer process))
(mark-point (process-mark process)))
(with-current-buffer process-buf
(save-excursion
(goto-char mark-point)
(if prepend-cont-prompt
(let* ((column (+ (- (point)
(let ((inhibit-field-text-motion t))
(forward-line -1)
(end-of-line)
(point)))
1))
(prompt (concat (make-string (max 0 (- column 6)) ? ) "... "))
(lines (split-string string "\n")))
(goto-char mark-point)
(elpy-shell--insert-and-font-lock
(car lines) 'comint-highlight-input no-font-lock)
(when (cdr lines)
;; no additional newline at end for multiline
(dolist (line (cdr lines))
(insert "\n")
(let ((from-point (point)))
(elpy-shell--insert-and-font-lock
prompt 'comint-highlight-prompt no-font-lock)
(add-text-properties
from-point (point)
'(field output inhibit-line-move-field-capture t
rear-nonsticky t)))
(elpy-shell--insert-and-font-lock
line 'comint-highlight-input no-font-lock)))
;; but put one for single line
(insert "\n"))
(elpy-shell--insert-and-font-lock
string 'comint-highlight-input no-font-lock))
(set-marker (process-mark process) (point)))))))
(defun elpy-shell--string-head-lines (string n)
"Extract the first N lines from STRING."
(let* ((line "\\(?:\\(?:.*\n\\)\\|\\(?:.+\\'\\)\\)")
(lines (concat line "\\{" (number-to-string n) "\\}"))
(regexp (concat "\\`" "\\(" lines "\\)")))
(if (string-match regexp string)
(match-string 1 string)
string)))
(defun elpy-shell--string-tail-lines (string n)
"Extract the last N lines from STRING."
(let* ((line "\\(?:\\(?:.*\n\\)\\|\\(?:.+\\'\\)\\)")
(lines (concat line "\\{" (number-to-string n) "\\}"))
(regexp (concat "\\(" lines "\\)" "\\'")))
(if (string-match regexp string)
(match-string 1 string)
string)))
(defun elpy-shell--python-shell-send-string-echo-advice (string &optional _process _msg)
"Advice to enable echoing of input in the Python shell."
(interactive)
(let* ((append-string ; strip setup code from Elpy
(if (string-match "import sys, codecs, os, ast;__pyfile = codecs.open.*$" string)
(replace-match "" nil nil string)
string))
(append-string ; strip setup code from python.el
(if (string-match "import codecs, os;__pyfile = codecs.open(.*;exec(compile(__code, .*$" append-string)
(replace-match "" nil nil append-string)
append-string))
(append-string ; here too
(if (string-match "^# -\\*- coding: utf-8 -\\*-\n*$" append-string)
(replace-match "" nil nil append-string)
append-string))
(append-string ; Strip "if True:", added when sending regions
(if (string-match "^if True:$" append-string)
(replace-match "" nil nil append-string)
append-string))
(append-string ; strip newlines from beginning and white space from end
(string-trim-right
(if (string-match "\\`\n+" append-string)
(replace-match "" nil nil append-string)
append-string)))
(append-string ; Dedent region
(elpy-shell--string-without-indentation append-string))
(head (elpy-shell--string-head-lines append-string elpy-shell-echo-input-lines-head))
(tail (elpy-shell--string-tail-lines append-string elpy-shell-echo-input-lines-tail))
(append-string (if (> (length append-string) (+ (length head) (length tail)))
(concat head "...\n" tail)
append-string)))
;; append the modified string to the shell output; prepend a newline for
;; multi-line strings
(if elpy-shell-echo-input-cont-prompt
(elpy-shell--append-to-shell-output append-string nil t)
(elpy-shell--append-to-shell-output
(concat (if (string-match "\n" append-string) "\n" "")
append-string
"\n")))))
(defun elpy-shell--enable-echo ()
"Enable input echoing when `elpy-shell-echo-input' is set."
(when elpy-shell-echo-input
(advice-add 'python-shell-send-string
:before 'elpy-shell--python-shell-send-string-echo-advice)))
(defun elpy-shell--disable-echo ()
"Disable input echoing."
(advice-remove 'python-shell-send-string
'elpy-shell--python-shell-send-string-echo-advice))
(defun elpy-shell-send-file (file-name &optional process temp-file-name
delete msg)
"Like `python-shell-send-file' but evaluates last expression separately.
See `python-shell-send-file' for a description of the
arguments. This function differs in that it breaks up the
Python code in FILE-NAME into statements. If the last statement
is a Python expression, it is evaluated separately in 'eval'
mode. This way, the interactive python shell can capture (and
print) the output of the last expression."
(interactive
(list
(read-file-name "File to send: ") ; file-name
nil ; process
nil ; temp-file-name
nil ; delete
t)) ; msg
(let* ((process (or process (python-shell-get-process-or-error msg)))
(encoding (with-temp-buffer
(insert-file-contents
(or temp-file-name file-name))
(python-info-encoding)))
(file-name (expand-file-name
(or (file-remote-p file-name 'localname)
file-name)))
(temp-file-name (when temp-file-name
(expand-file-name
(or (file-remote-p temp-file-name 'localname)
temp-file-name)))))
(python-shell-send-string
(format
(concat
"import sys, codecs, os, ast;"
"__pyfile = codecs.open('''%s''', encoding='''%s''');"
"__code = __pyfile.read().encode('''%s''');"
"__pyfile.close();"
(when (and delete temp-file-name)
(format "os.remove('''%s''');" temp-file-name))
"__block = ast.parse(__code, '''%s''', mode='exec');"
;; Has to ba a oneliner, which make conditionnal statements a bit complicated...
" __block.body = (__block.body if not isinstance(__block.body[0], ast.If) else __block.body if not isinstance(__block.body[0].test, ast.Name) else __block.body if not __block.body[0].test.id == 'True' else __block.body[0].body) if sys.version_info[0] < 3 else (__block.body if not isinstance(__block.body[0], ast.If) else __block.body if not isinstance(__block.body[0].test, ast.NameConstant) else __block.body if not __block.body[0].test.value is True else __block.body[0].body);"
"__last = __block.body[-1];" ;; the last statement
"__isexpr = isinstance(__last,ast.Expr);" ;; is it an expression?
"_ = __block.body.pop() if __isexpr else None;" ;; if so, remove it
"exec(compile(__block, '''%s''', mode='exec'));" ;; execute everything else
"eval(compile(ast.Expression(__last.value), '''%s''', mode='eval')) if __isexpr else None" ;; if it was an expression, it has been removed; now evaluate it
)
(or temp-file-name file-name) encoding encoding file-name file-name file-name)
process)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Navigation commands for sending
(defun elpy-shell--nav-beginning-of-statement ()
"Move the point to the beginning of the current or next Python statement.
If the current line starts with a statement, behaves exactly like
`python-nav-beginning-of-statement'. If the line is part of a
statement but not a statement itself, goes backwards to the
beginning of the statement. If the current line is not a code
line, skips forward to the next code line and navigates from
there."
(elpy-shell--skip-to-next-code-line)
(python-nav-beginning-of-statement)
(let ((p))
(while (and (not (eq p (point)))
(or (elpy-shell--current-line-else-or-elif-p)
(elpy-shell--current-line-decorated-defun-p)))
(elpy-nav-backward-block)
(setq p (point)))))
(defun elpy-shell--nav-end-of-statement ()
"Move the point to the end of the current Python statement.
Assumes that the point is precisely at the beginning of a
statement (e.g., after calling
`elpy-shell--nav-beginning-of-statement')."
(let ((continue t)
(p))
(while (and (not (eq p (point)))
continue)
;; if on a decorator, move to the associated function
(when (elpy-shell--current-line-decorator-p)
(elpy-nav-forward-block))
;; check if there is a another block at the same indentation level
(setq p (point))
(elpy-nav-forward-block)
;; if not, go to the end of the block and done
(if (eq p (point))
(progn
(python-nav-end-of-block)
(setq continue nil))
;; otherwise check if its an else/elif clause
(unless (elpy-shell--current-line-else-or-elif-p)
(forward-line -1)
(elpy-shell--skip-to-next-code-line t)
(setq continue nil)))))
(end-of-line))
(defun elpy-shell--nav-beginning-of-top-statement ()
"Move the point to the beginning of the current or next top-level statement.
If the point is within a top-level statement, moves to its
beginning. Otherwise, moves to the beginning of the next top-level
statement."
(interactive)
(elpy-shell--nav-beginning-of-statement)
(let ((p))
(while (and (not (eq p (point)))
(elpy-shell--current-line-indented-p))
(forward-line -1)
(elpy-shell--skip-to-next-code-line t)
(elpy-shell--nav-beginning-of-statement))))
(defun elpy-shell--nav-beginning-of-def (def-p)
"Move point to the beginning of the current definition.
DEF-P is a predicate function that decides whether the current
line starts a definition.
It the current line starts a definition, uses this definition. If
the current line does not start a definition and is a code line,
searches for the definition that contains the current line.
Otherwise, searches for the definition that contains the next
code line.
If a definition is found, moves point to the start of the
definition and returns t. Otherwise, retains point position and
returns nil."
(if (funcall def-p)
(progn
(python-nav-beginning-of-statement)
t)
(let ((beg-ts (save-excursion
(elpy-shell--skip-to-next-code-line t)
(elpy-shell--nav-beginning-of-top-statement)
(point)))
(orig-p (point))
(max-indent (save-excursion
(elpy-shell--skip-to-next-code-line)
(- (current-indentation) 1)))
(found))
(while (and (not found)
(>= (point) beg-ts))
(if (and (funcall def-p)
(<= (current-indentation) max-indent))
(setq found t)
(when (elpy-shell--current-line-code-line-p)
(setq max-indent (min max-indent
(- (current-indentation) 1))))
(forward-line -1)))
(if found
(python-nav-beginning-of-statement)
(goto-char orig-p))
found)))
(defun elpy-shell--nav-beginning-of-defun ()
"Move point to the beginning of the current function definition.
If a definition is found, moves point to the start of the
definition and returns t. Otherwise, retains point position and
returns nil.
See `elpy-shell--nav-beginning-of-def' for details."
(when (or (elpy-shell--nav-beginning-of-def 'elpy-shell--current-line-defun-p)
(elpy-shell--current-line-decorator-p))
(when (elpy-shell--current-line-decorated-defun-p)
(python-nav-backward-statement))
t))
(defun elpy-shell--nav-beginning-of-defclass ()
"Move point to the beginning of the current class definition.
If a definition is found, moves point to the start of the
definition and returns t. Otherwise, retains point position and
returns nil.
See `elpy-shell--nav-beginning-of-def' for details."
(elpy-shell--nav-beginning-of-def 'elpy-shell--current-line-defclass-p))
(defun elpy-shell--nav-beginning-of-group ()
"Move point to the beginning of the current or next group of top-level statements.
A sequence of top-level statements is a group if they are not
separated by empty lines. Empty lines within each top-level
statement are ignored.
If the point is within a top-level statement, moves to the
beginning of the group containing this statement. Otherwise, moves
to the first top-level statement below point."
(elpy-shell--nav-beginning-of-top-statement)
(while (not (or (elpy-shell--current-line-only-whitespace-p)
(eq (point) (point-min))))
(unless (python-info-current-line-comment-p)
(elpy-shell--nav-beginning-of-top-statement))
(forward-line -1)
(beginning-of-line))
(when (elpy-shell--current-line-only-whitespace-p)
(forward-line 1)
(beginning-of-line)))
;;;;;;;;;;;;;;;;;
;;; Send commands
(defun elpy-shell-send-statement-and-step ()
"Send current or next statement to Python shell and step.
If the current line is part of a statement, sends this statement.
Otherwise, skips forward to the next code line and sends the
corresponding statement."
(interactive)
(elpy-shell--ensure-shell-running)
(elpy-shell--nav-beginning-of-statement)
;; Make sure there is a statement to send
(unless (looking-at "[[:space:]]*$")
(unless elpy-shell-echo-input (elpy-shell--append-to-shell-output "\n"))
(let ((beg (save-excursion (beginning-of-line) (point)))
(end (progn (elpy-shell--nav-end-of-statement) (point))))
(unless (eq beg end)
(elpy-shell--flash-and-message-region beg end)
(elpy-shell--add-to-shell-history (buffer-substring beg end))
(elpy-shell--with-maybe-echo
(python-shell-send-string
(python-shell-buffer-substring beg end)))))
(python-nav-forward-statement)))
(defun elpy-shell-send-top-statement-and-step ()
"Send the current or next top-level statement to the Python shell and step.
If the current line is part of a top-level statement, sends this
top-level statement. Otherwise, skips forward to the next code
line and sends the corresponding top-level statement."
(interactive)
(elpy-shell--ensure-shell-running)
(let* ((beg (progn (elpy-shell--nav-beginning-of-top-statement) (point)))
(end (progn (elpy-shell--nav-end-of-statement) (point))))
(elpy-shell--flash-and-message-region beg end)
(if (string-match-p "\\`[^\n]*\\'" (buffer-substring beg end))
;; single line
(elpy-shell-send-statement-and-step)
;; multiple lines
(elpy-shell--add-to-shell-history (buffer-substring beg end))
(elpy-shell--with-maybe-echo
(python-shell-send-string (python-shell-buffer-substring beg end)))
(setq mark-active nil)
(python-nav-forward-statement))))
(defun elpy-shell-send-defun-and-step ()
"Send the function definition that contains the current line
to the Python shell and steps.
See `elpy-shell--nav-beginning-of-def' for details."
(interactive)
(if (elpy-shell--nav-beginning-of-defun)
(elpy-shell-send-statement-and-step)
(message "There is no function definition that includes the current line.")))
(defun elpy-shell-send-defclass-and-step ()
"Send the class definition that contains the current line to
the Python shell and steps.
See `elpy-shell--nav-beginning-of-def' for details."
(interactive)
(if (elpy-shell--nav-beginning-of-defclass)
(elpy-shell-send-statement-and-step)
(message "There is no class definition that includes the current line.")))
(defun elpy-shell-send-group-and-step ()
"Send the current or next group of top-level statements to the Python shell and step.
A sequence of top-level statements is a group if they are not
separated by empty lines. Empty lines within each top-level
statement are ignored.
If the point is within a top-level statement, send the group
around this statement. Otherwise, go to the top-level statement
below point and send the group around this statement."
(interactive)
(elpy-shell--ensure-shell-running)