unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
blob bc35c92493d08214e87c95ab12640a9b8287b666 18077 bytes (raw)
name: lisp/eshell/em-cmpl.el 	 # note: path name is non-authoritative(*)

  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
 
;;; em-cmpl.el --- completion using the TAB key  -*- lexical-binding:t -*-

;; Copyright (C) 1999-2022 Free Software Foundation, Inc.

;; Author: John Wiegley <johnw@gnu.org>

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Eshell, by using the pcomplete package, provides a full
;; programmable completion facility that is comparable to shells like
;; tcsh or zsh.
;;
;; Completions are context-sensitive, which means that pressing <TAB>
;; after the command 'rmdir' will result in a list of directories,
;; while doing so after 'rm' will result in a list of all file
;; entries.
;;
;; Many builtin completion rules are provided, for commands such as
;; `cvs', or RedHat's `rpm' utility.  Adding new completion rules is
;; no more difficult than writing a plain Lisp functions, and they can
;; be debugged, profiled, and compiled using exactly the same
;; facilities (since in fact, they *are* just Lisp functions).  See
;; the definition of the function `pcomplete/make' for an example of
;; how to write a completion function.
;;
;; The completion facility is very easy to use.  Just press TAB.  If
;; there are a large number of possible completions, a buffer will
;; appear showing a list of them.  Completions may be selected from
;; that buffer using the mouse.  If no completion is selected, and the
;; user starts doing something else, the display buffer will
;; automatically disappear.
;;
;; If the list of possible completions is very small, Eshell will
;; "cycle" through them, selecting a different entry each time <TAB>
;; is pressed.  <S-TAB> may be used to cycle in the opposite
;; direction.
;;
;; Glob patterns can also be cycled.  For example, entering 'echo
;; x*<tab>' will cycle through all the filenames beginning with 'x'.
;; This is done because the glob list is treated as though it were a
;; list of possible completions.  Pressing <C-c SPC> will insert all
;; of the matching glob patterns at point.
;;
;; If a Lisp form is being entered, <TAB> will complete the Lisp
;; symbol name, in exactly the same way that <M-TAB> does in Emacs
;; Lisp mode.
;;
;; The list of possible completions can be viewed at any point by
;; pressing <M-?>.
;;
;; Finally, context-related help can be accessed by pressing <C-c M-h>.
;; This only works well if the completion function has provided Eshell
;; with sufficient pointers to locate the relevant help text.

;;; Code:
(require 'pcomplete)

(require 'esh-mode)
(require 'esh-util)
(require 'em-dirs)

(eval-when-compile
  (require 'cl-lib)
  (require 'eshell))

;;;###autoload
(progn
(defgroup eshell-cmpl nil
  "This module provides a programmable completion function bound to
the TAB key, which allows for completing command names, file names,
variable names, arguments, etc."
  :tag "Argument completion"
  :group 'eshell-module))

;;; User Variables:

(defcustom eshell-cmpl-load-hook nil
  "A list of functions to run when `eshell-cmpl' is loaded."
  :version "24.1"			; removed eshell-cmpl-initialize
  :type 'hook)

(defcustom eshell-show-lisp-completions nil
  "If non-nil, include Lisp functions in the command completion list.
If this variable is nil, Lisp completion can still be done in command
position by using M-TAB instead of TAB."
  :type 'boolean)

(defcustom eshell-show-lisp-alternatives t
  "If non-nil, and no other completions found, show Lisp functions.
Setting this variable means nothing if `eshell-show-lisp-completions'
is non-nil."
  :type 'boolean)

(defcustom eshell-no-completion-during-jobs t
  "If non-nil, don't allow completion while a process is running."
  :type 'boolean)

(defcustom eshell-command-completions-alist
  '(("acroread" . "\\.pdf\\'")
    ("xpdf"     . "\\.pdf\\'")
    ("gunzip"   . "\\.t?gz\\'")
    ("bunzip2"  . "\\.t?bz2\\'")
    ("unxz"     . "\\.t?xz\\'")
    ("ar"       . "\\.[ao]\\'")
    ("gcc"      . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
    ("g++"      . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
    ("cc"       . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
    ("CC"       . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
    ("acc"      . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
    ("bcc"      . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
    ("readelf"  . "\\(\\`[^.]*\\|\\.\\([ao]\\|so\\)\\)\\'")
    ("objdump"  . "\\(\\`[^.]*\\|\\.\\([ao]\\|so\\)\\)\\'")
    ("nm"       . "\\(\\`[^.]*\\|\\.\\([ao]\\|so\\)\\)\\'")
    ("gdb"      . "\\`\\([^.]*\\|a\\.out\\)\\'")
    ("dbx"      . "\\`\\([^.]*\\|a\\.out\\)\\'")
    ("sdb"      . "\\`\\([^.]*\\|a\\.out\\)\\'")
    ("adb"      . "\\`\\([^.]*\\|a\\.out\\)\\'"))
  "An alist that defines simple argument type correlations.
This is provided for common commands, as a simplistic alternative
to writing a completion function."
  :type '(repeat (cons string regexp)))

(defun eshell-cmpl--custom-variable-docstring (pcomplete-var)
  "Generate the docstring of a variable derived from a pcomplete-* variable."
  (format "%s\n\nIts value is assigned to `%s' locally after eshell starts."
          (documentation-property pcomplete-var
                                  'variable-documentation t)
          (symbol-name pcomplete-var)))

(defcustom eshell-cmpl-file-ignore "~\\'"
  (eshell-cmpl--custom-variable-docstring 'pcomplete-file-ignore)
  :type (get 'pcomplete-file-ignore 'custom-type))

(defcustom eshell-cmpl-dir-ignore "\\`\\(\\.\\.?\\|CVS\\)/\\'"
  (eshell-cmpl--custom-variable-docstring 'pcomplete-dir-ignore)
  :type (get 'pcomplete-dir-ignore 'custom-type))

(defcustom eshell-cmpl-ignore-case (eshell-under-windows-p)
  (eshell-cmpl--custom-variable-docstring 'completion-ignore-case)
  :type (get 'completion-ignore-case 'custom-type))

(defcustom eshell-cmpl-autolist nil
  (eshell-cmpl--custom-variable-docstring 'pcomplete-autolist)
  :type (get 'pcomplete-autolist 'custom-type))

(defcustom eshell-cmpl-suffix-list (list ?/ ?:)
  (eshell-cmpl--custom-variable-docstring 'pcomplete-suffix-list)
  :type (get 'pcomplete-suffix-list 'custom-type)
  :group 'pcomplete)
;; Only labeled obsolete in 26.1, but all it does it set
;; pcomplete-suffix-list, which is itself obsolete since 24.1.
(make-obsolete-variable 'eshell-cmpl-suffix-list nil "24.1")

(defcustom eshell-cmpl-recexact nil
  (eshell-cmpl--custom-variable-docstring 'pcomplete-recexact)
  :type (get 'pcomplete-recexact 'custom-type))

(defcustom eshell-cmpl-man-function #'man
  (eshell-cmpl--custom-variable-docstring 'pcomplete-man-function)
  :type (get 'pcomplete-man-function 'custom-type))

(defcustom eshell-cmpl-compare-entry-function #'file-newer-than-file-p
  (eshell-cmpl--custom-variable-docstring 'pcomplete-compare-entry-function)
  :type (get 'pcomplete-compare-entry-function 'custom-type))

(defcustom eshell-cmpl-expand-before-complete nil
  (eshell-cmpl--custom-variable-docstring 'pcomplete-expand-before-complete)
  :type (get 'pcomplete-expand-before-complete 'custom-type))

(defcustom eshell-cmpl-cycle-completions t
  (eshell-cmpl--custom-variable-docstring 'pcomplete-cycle-completions)
  :type (get 'pcomplete-cycle-completions 'custom-type))

(defcustom eshell-cmpl-cycle-cutoff-length 5
  (eshell-cmpl--custom-variable-docstring 'pcomplete-cycle-cutoff-length)
  :type (get 'pcomplete-cycle-cutoff-length 'custom-type))

(defcustom eshell-cmpl-restore-window-delay 1
  (eshell-cmpl--custom-variable-docstring 'pcomplete-restore-window-delay)
  :type (get 'pcomplete-restore-window-delay 'custom-type))

(defcustom eshell-command-completion-function
  (lambda ()
    (pcomplete-here (eshell--complete-commands-list)))
  (eshell-cmpl--custom-variable-docstring 'pcomplete-command-completion-function)
  :type (get 'pcomplete-command-completion-function 'custom-type))

(defcustom eshell-cmpl-command-name-function
  #'eshell-completion-command-name
  (eshell-cmpl--custom-variable-docstring 'pcomplete-command-name-function)
  :type (get 'pcomplete-command-name-function 'custom-type))

(defcustom eshell-default-completion-function
  (lambda ()
    (while (pcomplete-here
            (pcomplete-dirs-or-entries
             (cdr (assoc (funcall eshell-cmpl-command-name-function)
                         eshell-command-completions-alist))))))
  (eshell-cmpl--custom-variable-docstring 'pcomplete-default-completion-function)
  :type (get 'pcomplete-default-completion-function 'custom-type))

(defcustom eshell-cmpl-use-paring t
  (eshell-cmpl--custom-variable-docstring 'pcomplete-use-paring)
  :type (get 'pcomplete-use-paring 'custom-type))

;;; Functions:

(defun eshell-complete-lisp-symbol ()
  "Try to complete the text around point as a Lisp symbol."
  (interactive)
  (let ((completion-at-point-functions '(elisp-completion-at-point)))
    (completion-at-point)))

(defvar-keymap eshell-cmpl-mode-map
  "C-i"       #'completion-at-point
  ;; jww (1999-10-19): Will this work on anything but X?
  "<backtab>" #'pcomplete-reverse
  "M-?"       #'completion-help-at-point
  "C-M-i"     #'eshell-complete-lisp-symbol
  ;; C-c prefix:
  "C-c M-h"   #'eshell-completion-help
  "C-c TAB"   #'pcomplete-expand-and-complete
  "C-c C-i"   #'pcomplete-expand-and-complete
  "C-c SPC"   #'pcomplete-expand)

(define-minor-mode eshell-cmpl-mode
  "Minor mode that provides a keymap when `eshell-cmpl' active.

\\{eshell-cmpl-mode-map}"
  :keymap eshell-cmpl-mode-map)

(defun eshell-cmpl-initialize ()    ;Called from `eshell-mode' via intern-soft!
  "Initialize the completions module."
  (setq-local pcomplete-command-completion-function
              eshell-command-completion-function)
  (setq-local pcomplete-command-name-function
              eshell-cmpl-command-name-function)
  (setq-local pcomplete-default-completion-function
              eshell-default-completion-function)
  (setq-local pcomplete-parse-arguments-function
              #'eshell-complete-parse-arguments)
  (setq-local pcomplete-file-ignore
              eshell-cmpl-file-ignore)
  (setq-local pcomplete-dir-ignore
              eshell-cmpl-dir-ignore)
  (setq-local completion-ignore-case
              eshell-cmpl-ignore-case)
  (setq-local pcomplete-autolist
              eshell-cmpl-autolist)
  (if (boundp 'pcomplete-suffix-list)
      (setq-local pcomplete-suffix-list
                  eshell-cmpl-suffix-list))
  (setq-local pcomplete-recexact
              eshell-cmpl-recexact)
  (setq-local pcomplete-man-function
              eshell-cmpl-man-function)
  (setq-local pcomplete-compare-entry-function
              eshell-cmpl-compare-entry-function)
  (setq-local pcomplete-expand-before-complete
              eshell-cmpl-expand-before-complete)
  (setq-local pcomplete-cycle-completions
              eshell-cmpl-cycle-completions)
  (setq-local pcomplete-cycle-cutoff-length
              eshell-cmpl-cycle-cutoff-length)
  (setq-local pcomplete-restore-window-delay
              eshell-cmpl-restore-window-delay)
  (setq-local pcomplete-use-paring
              eshell-cmpl-use-paring)
  ;; `comint-file-name-quote-list' should only be set after all the
  ;; load-hooks for any other extension modules have been run, which
  ;; is true at the time `eshell-mode-hook' is run
  (add-hook 'eshell-mode-hook
            (lambda ()
              (setq-local comint-file-name-quote-list
                          eshell-special-chars-outside-quoting))
            nil t)
  (add-hook 'pcomplete-quote-arg-hook #'eshell-quote-backslash nil t)
  (add-hook 'completion-at-point-functions
            #'pcomplete-completions-at-point nil t)
  (eshell-cmpl-mode))

(defun eshell-completion-command-name ()
  "Return the command name, possibly sans globbing."
  (let ((cmd (file-name-nondirectory (pcomplete-arg 'first))))
    (setq cmd (if (and (> (length cmd) 0)
		       (eq (aref cmd 0) eshell-explicit-command-char))
		  (substring cmd 1)
		cmd))
    (if (eshell-under-windows-p)
	(file-name-sans-extension cmd)
      cmd)))

(defun eshell-completion-help ()
  (interactive)
  (if (= (point) eshell-last-output-end)
      (describe-prefix-bindings)
    (call-interactively 'pcomplete-help)))

(defun eshell--pcomplete-insert-tab ()
  (if (not pcomplete-allow-modifications)
      (throw 'pcompleted nil)
    (insert-and-inherit "\t")
    (throw 'pcompleted t)))

(defun eshell-complete-parse-arguments ()
  "Parse the command line arguments for `pcomplete-argument'."
  (when (and eshell-no-completion-during-jobs
	     (eshell-interactive-process))
    (eshell--pcomplete-insert-tab))
  (let ((end (point-marker))
	(begin (save-excursion (eshell-bol) (point)))
	(posns (list t))
	args delim)
    (when (and pcomplete-allow-modifications
	       (memq this-command '(pcomplete-expand
			            pcomplete-expand-and-complete)))
      (run-hook-with-args 'eshell-expand-input-functions begin end)
      (if (= begin end)
	  (end-of-line))
      (setq end (point-marker)))
    (if (setq delim
	      (catch 'eshell-incomplete
		(ignore
		 (setq args (eshell-parse-arguments begin end)))))
	(cond ((memq (car delim) '(?\{ ?\<))
	       (setq begin (1+ (cadr delim))
		     args (eshell-parse-arguments begin end)))
	      ((eq (car delim) ?\()
	       (throw 'pcompleted (elisp-completion-at-point)))
	      (t
	       (eshell--pcomplete-insert-tab))))
    (when (get-text-property (1- end) 'comment)
      (eshell--pcomplete-insert-tab))
    (let ((pos begin))
      (while (< pos end)
	(if (get-text-property pos 'arg-begin)
	    (nconc posns (list pos)))
	(setq pos (1+ pos))))
    (setq posns (cdr posns))
    (cl-assert (= (length args) (length posns)))
    (let ((a args)
	  (i 0)
	  l)
      (while a
	(if (and (consp (car a))
		 (eq (caar a) 'eshell-operator))
	    (setq l i))
	(setq a (cdr a) i (1+ i)))
      (and l
	   (setq args (nthcdr (1+ l) args)
		 posns (nthcdr (1+ l) posns))))
    (cl-assert (= (length args) (length posns)))
    (when (and args (eq (char-syntax (char-before end)) ? )
	       (not (eq (char-before (1- end)) ?\\)))
      (nconc args (list ""))
      (nconc posns (list (point))))
    (cons (mapcar
           (lambda (arg)
             (let ((val
                    (if (listp arg)
                        (let ((result
                               (eshell-do-eval
                                (list 'eshell-commands arg) t)))
                          (cl-assert (eq (car result) 'quote))
                          (cadr result))
                      arg)))
               (cond ((numberp val)
                      (setq val (number-to-string val)))
                     ;; expand .../ etc that only eshell understands to
                     ;; standard ../../
                     ((and (stringp val)) (string-match "\\.\\.\\.+/" val)
                      (setq val (eshell-expand-multiple-dots val))))
               (or val "")))
	   args)
	  posns)))

(defun eshell--complete-commands-list ()
  "Generate list of applicable, visible commands."
  ;; Building the commands list can take quite a while, especially over Tramp
  ;; (bug#41423), so do it lazily.
  (let ((glob-name
	 ;; When a command is specified using `eshell-explicit-command-char',
         ;; that char is not part of the command and hence not part of what
         ;; we complete.  Adjust `pcomplete-stub' accordingly!
	 (if (and (> (length pcomplete-stub) 0)
	          (eq (aref pcomplete-stub 0) eshell-explicit-command-char))
	     (setq pcomplete-stub (substring pcomplete-stub 1)))))
    (completion-table-dynamic
     (lambda (filename)
       (if (file-name-directory filename)
           (if eshell-force-execution
               (pcomplete-dirs-or-entries nil #'file-readable-p)
             (pcomplete-executables))
	 (let* ((paths (eshell-get-path))
		(cwd (file-name-as-directory
		      (expand-file-name default-directory)))
		(filepath "") (completions ()))
	   ;; Go thru each path in the search path, finding completions.
	   (dolist (path paths)
	     (setq path (file-name-as-directory
		         (expand-file-name (or path "."))))
	     ;; Go thru each completion found, to see whether it should
	     ;; be used.
	     (dolist (file (and (file-accessible-directory-p path)
		                (file-name-all-completions filename path)))
	       (setq filepath (concat path file))
	       (if (and (not (member file completions)) ;
			(or (string-equal path cwd)
			    (not (file-directory-p filepath)))
			;; FIXME: Those repeated file tests end up
			;; very costly over Tramp, we should cache the result.
			(if eshell-force-execution
                            (file-readable-p filepath)
                          (file-executable-p filepath)))
		   (push file completions))))
	   ;; Add aliases which are currently visible, and Lisp functions.
	   (pcomplete-uniquify-list
	    (if glob-name
	        completions
	      (setq completions
		    (append (if (fboundp 'eshell-alias-completions)
			        (eshell-alias-completions filename))
			    (eshell-winnow-list
			     (mapcar
                              (lambda (name)
                                (substring name 7))
			      (all-completions (concat "eshell/" filename)
					       obarray #'functionp))
			     nil '(eshell-find-alias-function))
			    completions))
	      (append (and (or eshell-show-lisp-completions
			       (and eshell-show-lisp-alternatives
				    (null completions)))
			   (all-completions filename obarray #'functionp))
		      completions)))))))))

(define-obsolete-function-alias 'eshell-pcomplete #'completion-at-point "27.1")

(provide 'em-cmpl)

;; Local Variables:
;; generated-autoload-file: "esh-groups.el"
;; End:

;;; em-cmpl.el ends here

debug log:

solving bc35c92493 ...
found bc35c92493 in https://yhetil.org/emacs-bugs/jwvk0ercrp5.fsf-monnier+emacs@gnu.org/
found c6a51b1793 in https://git.savannah.gnu.org/cgit/emacs.git
preparing index
index prepared:
100644 c6a51b1793e31812badd56aaac6b29ba3ba72d72	lisp/eshell/em-cmpl.el

applying [1/1] https://yhetil.org/emacs-bugs/jwvk0ercrp5.fsf-monnier+emacs@gnu.org/
diff --git a/lisp/eshell/em-cmpl.el b/lisp/eshell/em-cmpl.el
index c6a51b1793..bc35c92493 100644

Checking patch lisp/eshell/em-cmpl.el...
Applied patch lisp/eshell/em-cmpl.el cleanly.

index at:
100644 bc35c92493d08214e87c95ab12640a9b8287b666	lisp/eshell/em-cmpl.el

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).