em-pred.el 19.4 KB
Newer Older
1
;;; em-pred.el --- argument predicates and modifiers (ala zsh)
Gerd Moellmann's avatar
Gerd Moellmann committed
2

3
;; Copyright (C) 1999, 2000 Free Software Foundation
Gerd Moellmann's avatar
Gerd Moellmann committed
4

Gerd Moellmann's avatar
Gerd Moellmann committed
5 6
;; Author: John Wiegley <johnw@gnu.org>

Gerd Moellmann's avatar
Gerd Moellmann committed
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
;; 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 2, 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; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

(provide 'em-pred)

(eval-when-compile (require 'esh-maint))

(defgroup eshell-pred nil
  "This module allows for predicates to be applied to globbing
patterns (similar to zsh), in addition to string modifiers which can
be applied either to globbing results, variable references, or just
ordinary strings."
  :tag "Value modifiers and predicates"
  :group 'eshell-module)

;;; Commentary:

;; Argument predication is used to affect which members of a list are
;; selected for use as argument.  This is most useful with globbing,
;; but can be used on any list argument, to select certain members.
;;
;; Argument modifiers are used to manipulate argument values.  For
;; example, sorting lists, upcasing words, substituting characters,
;; etc.
;;
;; Here are some examples of how to use argument predication.  Most of
;; the predicates and modifiers are modeled after those provided by
;; zsh.
;;
;;   ls -ld *(/)           ; list all directories
;;   ls -l *(@u'johnw')    ; list all symlinks owned by 'johnw'
;;   bzip2 -9v **/*(a+30)  ; compress everything which hasn't been
;;                           accessed in 30 days
;;   echo *.c(:o:R)     ; a reversed, sorted list of C files
;;   *(^@:U^u0)         ; all non-symlinks not owned by 'root', upcased
;;   chmod u-x *(U*)    : remove exec bit on all executables owned by user
;;
;; See the zsh docs for more on the syntax ([(zsh.info)Filename
;; Generation]).

61 62
;;; Code:

Gerd Moellmann's avatar
Gerd Moellmann committed
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
;;; User Variables:

(defcustom eshell-pred-load-hook '(eshell-pred-initialize)
  "*A list of functions to run when `eshell-pred' is loaded."
  :type 'hook
  :group 'eshell-pred)

(defcustom eshell-predicate-alist
  '((?/ . (eshell-pred-file-type ?d))   ; directories
    (?. . (eshell-pred-file-type ?-))   ; regular files
    (?s . (eshell-pred-file-type ?s))   ; sockets
    (?p . (eshell-pred-file-type ?p))   ; named pipes
    (?@ . (eshell-pred-file-type ?l))   ; symbolic links
    (?% . (eshell-pred-file-type ?%))   ; allow user to specify (c def.)
    (?r . (eshell-pred-file-mode 0400)) ; owner-readable
    (?w . (eshell-pred-file-mode 0200)) ; owner-writable
    (?x . (eshell-pred-file-mode 0100)) ; owner-executable
    (?A . (eshell-pred-file-mode 0040)) ; group-readable
    (?I . (eshell-pred-file-mode 0020)) ; group-writable
    (?E . (eshell-pred-file-mode 0010)) ; group-executable
    (?R . (eshell-pred-file-mode 0004)) ; world-readable
    (?W . (eshell-pred-file-mode 0002)) ; world-writable
    (?X . (eshell-pred-file-mode 0001)) ; world-executable
    (?s . (eshell-pred-file-mode 4000)) ; setuid
    (?S . (eshell-pred-file-mode 2000)) ; setgid
    (?t . (eshell-pred-file-mode 1000)) ; sticky bit
    (?U . '(lambda (file)               ; owned by effective uid
	     (if (file-exists-p file)
		 (= (nth 2 (file-attributes file)) (user-uid)))))
;;; (?G . '(lambda (file)               ; owned by effective gid
;;;          (if (file-exists-p file)
;;;              (= (nth 2 (file-attributes file)) (user-uid)))))
    (?* . '(lambda (file)
	     (and (file-regular-p file)
		  (not (file-symlink-p file))
		  (file-executable-p file))))
    (?l . (eshell-pred-file-links))
    (?u . (eshell-pred-user-or-group ?u "user" 2 'eshell-user-id))
    (?g . (eshell-pred-user-or-group ?g "group" 3 'eshell-group-id))
    (?a . (eshell-pred-file-time ?a "access" 4))
    (?m . (eshell-pred-file-time ?m "modification" 5))
    (?c . (eshell-pred-file-time ?c "change" 6))
    (?L . (eshell-pred-file-size)))
  "*A list of predicates than can be applied to a globbing pattern.
The format of each entry is

  (CHAR . PREDICATE-FUNC-SEXP)"
  :type '(repeat (cons character sexp))
  :group 'eshell-pred)

(put 'eshell-predicate-alist 'risky-local-variable t)

(defcustom eshell-modifier-alist
116
  '((?E . '(lambda (lst)
Gerd Moellmann's avatar
Gerd Moellmann committed
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
	     (mapcar
	      (function
	       (lambda (str)
		 (eshell-stringify
		  (car (eshell-parse-argument str))))) lst)))
    (?L . '(lambda (lst)
	     (mapcar 'downcase lst)))
    (?U . '(lambda (lst)
	     (mapcar 'upcase lst)))
    (?C . '(lambda (lst)
	     (mapcar 'capitalize lst)))
    (?h . '(lambda (lst)
	     (mapcar 'file-name-directory lst)))
    (?i . (eshell-include-members))
    (?x . (eshell-include-members t))
    (?r . '(lambda (lst)
	     (mapcar 'file-name-sans-extension lst)))
    (?e . '(lambda (lst)
	     (mapcar 'file-name-extension lst)))
    (?t . '(lambda (lst)
	     (mapcar 'file-name-nondirectory lst)))
    (?q . '(lambda (lst)
	     (mapcar 'eshell-escape-arg lst)))
    (?u . '(lambda (lst)
	     (eshell-uniqify-list lst)))
    (?o . '(lambda (lst)
	     (sort lst 'string-lessp)))
    (?O . '(lambda (lst)
	     (nreverse (sort lst 'string-lessp))))
    (?j . (eshell-join-members))
    (?S . (eshell-split-members))
    (?R . 'reverse)
    (?g . (progn
	    (forward-char)
	    (if (eq (char-before) ?s)
		(eshell-pred-substitute t)
	      (error "`g' modifier cannot be used alone"))))
    (?s . (eshell-pred-substitute)))
  "*A list of modifiers than can be applied to an argument expansion.
The format of each entry is

  (CHAR ENTRYWISE-P MODIFIER-FUNC-SEXP)"
  :type '(repeat (cons character sexp))
  :group 'eshell-pred)

(put 'eshell-modifier-alist 'risky-local-variable t)

(defvar eshell-predicate-help-string
  "Eshell predicate quick reference:

  -  follow symbolic references for predicates after the `-'
  ^  invert sense of predicates after the `^'

FILE TYPE:
  /  directories              s  sockets
  .  regular files            p  named pipes
  *  executable (files only)  @  symbolic links

  %x  file type == `x' (as by ls -l; so `c' = char device, etc.)

PERMISSION BITS (for owner/group/world):
  r/A/R  readable    s  setuid
  w/I/W  writable    S  setgid
  x/E/X  executable  t  sticky bit

OWNERSHIP:
  U               owned by effective uid
  u(UID|'user')   owned by UID/user
  g(GID|'group')  owned by GID/group

FILE ATTRIBUTES:
  l[+-]N                 +/-/= N links
  a[Mwhm][+-](N|'FILE')  access time +/-/= N mnths/weeks/days/mins
			 if FILE specified, use as comparison basis;
			 so a+'file.c' shows files accessed before
			 file.c was last accessed
  m[Mwhm][+-](N|'FILE')  modification time...
  c[Mwhm][+-](N|'FILE')  change time...
  L[kmp][+-]N            file size +/-/= N Kb/Mb/blocks

EXAMPLES:
  *(^@)         all non-dot files which are not symlinks
  .#*(^@)       all files which are not symbolic links
  **/.#*(*)     all executable files, searched recursively
  ***/*~f*(-/)  recursively (though not traversing symlinks),
		find all directories (or symlinks referring to
		directories) whose names do not begin with f.
  e*(*Lk+50)    executables 50k or larger beginning with 'e'")

(defvar eshell-modifier-help-string
  "Eshell modifier quick reference:

FOR SINGLE ARGUMENTS, or each argument of a list of strings:
210
  E  evaluate again
Gerd Moellmann's avatar
Gerd Moellmann committed
211 212 213 214 215 216 217 218 219 220
  L  lowercase
  U  uppercase
  C  capitalize
  h  dirname
  t  basename
  e  file extension
  r  strip file extension
  q  escape special characters

  S       split string at any whitespace character
221
  S/PAT/  split string at each occurrence of PAT
Gerd Moellmann's avatar
Gerd Moellmann committed
222 223 224 225 226 227 228 229 230 231 232 233 234

FOR LISTS OF ARGUMENTS:
  o  sort alphabetically
  O  reverse sort alphabetically
  u  uniq list (typically used after :o or :O)
  R  reverse list

  j       join list members, separated by a space
  j/PAT/  join list members, separated by PAT
  i/PAT/  exclude all members not matching PAT
  x/PAT/  exclude all members matching PAT

  s/pat/match/  substitute PAT with MATCH
235
  g/pat/match/  substitute PAT with MATCH for all occurrences
Gerd Moellmann's avatar
Gerd Moellmann committed
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

EXAMPLES:
  *.c(:o)  sorted list of .c files")

;;; Functions:

(defun eshell-display-predicate-help ()
  (interactive)
  (with-electric-help
   (function
    (lambda ()
      (insert eshell-predicate-help-string)))))

(defun eshell-display-modifier-help ()
  (interactive)
  (with-electric-help
   (function
    (lambda ()
      (insert eshell-modifier-help-string)))))

(defun eshell-pred-initialize ()
  "Initialize the predicate/modifier code."
  (add-hook 'eshell-parse-argument-hook
	    'eshell-parse-arg-modifier t t)
  (define-key eshell-command-map [(meta ?q)] 'eshell-display-predicate-help)
  (define-key eshell-command-map [(meta ?m)] 'eshell-display-modifier-help))

(defun eshell-apply-modifiers (lst predicates modifiers)
  "Apply to LIST a series of PREDICATES and MODIFIERS."
  (let (stringified)
    (if (stringp lst)
	(setq lst (list lst)
	      stringified t))
    (when (listp lst)
      (setq lst (eshell-winnow-list lst nil predicates))
      (while modifiers
	(setq lst (funcall (car modifiers) lst)
	      modifiers (cdr modifiers)))
      (if (and stringified
	       (= (length lst) 1))
	  (car lst)
	lst))))

(defun eshell-parse-arg-modifier ()
  "Parse a modifier that has been specified after an argument.
This function is specially for adding onto `eshell-parse-argument-hook'."
  (when (eq (char-after) ?\()
    (forward-char)
    (let ((end (eshell-find-delimiter ?\( ?\))))
      (if (not end)
	  (throw 'eshell-incomplete ?\()
	(when (eshell-arg-delimiter (1+ end))
	  (save-restriction
	    (narrow-to-region (point) end)
	    (let* ((modifiers (eshell-parse-modifiers))
		   (preds (car modifiers))
		   (mods (cdr modifiers)))
	      (if (or preds mods)
		  ;; has to go at the end, which is only natural since
		  ;; syntactically it can only occur at the end
		  (setq eshell-current-modifiers
			(append
			 eshell-current-modifiers
			 (list
			  `(lambda (lst)
			     (eshell-apply-modifiers
			      lst (quote ,preds) (quote ,mods)))))))))
	  (goto-char (1+ end))
	  (eshell-finish-arg))))))

(defun eshell-parse-modifiers ()
  "Parse value modifiers and predicates at point.
If ALLOW-PREDS is non-nil, predicates will be parsed as well.
Return a cons cell of the form

  (PRED-FUNC-LIST . MOD-FUNC-LIST)

NEW-STRING is STRING minus any modifiers.  PRED-FUNC-LIST is a list of
predicate functions.  MOD-FUNC-LIST is a list of result modifier
functions.  PRED-FUNCS take a filename and return t if the test
succeeds; MOD-FUNCS take any string and preform a modification,
returning the resultant string."
  (let (result negate follow preds mods)
    (condition-case err
	(while (not (eobp))
	  (let ((char (char-after)))
	    (cond
	     ((eq char ?')
	      (forward-char)
	      (if (looking-at "[^|':]")
		  (let ((func (read (current-buffer))))
		    (if (and func (functionp func))
			(setq preds (eshell-add-pred-func func preds
							  negate follow))
		      (error "Invalid function predicate '%s'"
			     (eshell-stringify func))))
		(error "Invalid function predicate")))
	     ((eq char ?^)
	      (forward-char)
	      (setq negate (not negate)))
	     ((eq char ?-)
	      (forward-char)
	      (setq follow (not follow)))
	     ((eq char ?|)
	      (forward-char)
	      (if (looking-at "[^|':]")
		  (let ((func (read (current-buffer))))
		    (if (and func (functionp func))
			(setq mods
			      (cons `(lambda (lst)
				       (mapcar (function ,func) lst))
				    mods))
		      (error "Invalid function modifier '%s'"
			     (eshell-stringify func))))
		(error "Invalid function modifier")))
	     ((eq char ?:)
	      (forward-char)
	      (let ((mod (assq (char-after) eshell-modifier-alist)))
		(if (not mod)
		    (error "Unknown modifier character '%c'" (char-after))
		  (forward-char)
		  (setq mods (cons (eval (cdr mod)) mods)))))
	     (t
	      (let ((pred (assq char eshell-predicate-alist)))
		(if (not pred)
		    (error "Unknown predicate character '%c'" char)
		  (forward-char)
		  (setq preds
			(eshell-add-pred-func (eval (cdr pred)) preds
					      negate follow))))))))
      (end-of-buffer
       (error "Predicate or modifier ended prematurely")))
    (cons (nreverse preds) (nreverse mods))))

(defun eshell-add-pred-func (pred funcs negate follow)
  "Add the predicate function PRED to FUNCS."
  (if negate
      (setq pred `(lambda (file)
		    (not (funcall ,pred file)))))
  (if follow
      (setq pred `(lambda (file)
		    (funcall ,pred (file-truename file)))))
  (cons pred funcs))

(defun eshell-pred-user-or-group (mod-char mod-type attr-index get-id-func)
  "Return a predicate to test whether a file match a given user/group id."
  (let (ugid open close end)
    (if (looking-at "[0-9]+")
	(progn
	  (setq ugid (string-to-number (match-string 0)))
	  (goto-char (match-end 0)))
      (setq open (char-after))
      (if (setq close (memq open '(?\( ?\[ ?\< ?\{)))
	  (setq close (car (last '(?\) ?\] ?\> ?\})
				 (length close))))
	(setq close open))
      (forward-char)
      (setq end (eshell-find-delimiter open close))
      (unless end
	(error "Malformed %s name string for modifier `%c'"
	       mod-type mod-char))
      (setq ugid
	    (funcall get-id-func (buffer-substring (point) end)))
      (goto-char (1+ end)))
    (unless ugid
      (error "Unknown %s name specified for modifier `%c'"
	     mod-type mod-char))
    `(lambda (file)
       (let ((attrs (file-attributes file)))
	 (if attrs
	     (= (nth ,attr-index attrs) ,ugid))))))

(defun eshell-pred-file-time (mod-char mod-type attr-index)
  "Return a predicate to test whether a file matches a certain time."
  (let* ((quantum 86400)
	 qual amount when open close end)
    (when (memq (char-after) '(?M ?w ?h ?m))
      (setq quantum (char-after))
      (cond
       ((eq quantum ?M)
	(setq quantum (* 60 60 24 30)))
       ((eq quantum ?w)
	(setq quantum (* 60 60 24 7)))
       ((eq quantum ?h)
	(setq quantum (* 60 60)))
       ((eq quantum ?m)
	(setq quantum 60))
       ((eq quantum ?s)
	(setq quantum 1)))
      (forward-char))
    (when (memq (char-after) '(?+ ?-))
      (setq qual (char-after))
      (forward-char))
    (if (looking-at "[0-9]+")
	(progn
	  (setq when (- (eshell-time-to-seconds (current-time))
			(* (string-to-number (match-string 0))
			   quantum)))
	  (goto-char (match-end 0)))
      (setq open (char-after))
      (if (setq close (memq open '(?\( ?\[ ?\< ?\{)))
	  (setq close (car (last '(?\) ?\] ?\> ?\})
				 (length close))))
	(setq close open))
      (forward-char)
      (setq end (eshell-find-delimiter open close))
      (unless end
	(error "Malformed %s time modifier `%c'" mod-type mod-char))
      (let* ((file (buffer-substring (point) end))
	     (attrs (file-attributes file)))
	(unless attrs
	  (error "Cannot stat file `%s'" file))
	(setq when (eshell-time-to-seconds (nth attr-index attrs))))
      (goto-char (1+ end)))
    `(lambda (file)
       (let ((attrs (file-attributes file)))
	 (if attrs
	     (,(if (eq qual ?-)
		   '<
		 (if (eq qual ?+)
		     '>
		   '=)) ,when (eshell-time-to-seconds
			       (nth ,attr-index attrs))))))))

(defun eshell-pred-file-type (type)
  "Return a test which tests that the file is of a certain TYPE.
TYPE must be a character, and should be one of the possible options
that 'ls -l' will show in the first column of its display. "
  (when (eq type ?%)
    (setq type (char-after))
    (if (memq type '(?b ?c))
	(forward-char)
      (setq type ?%)))
  `(lambda (file)
470
     (let ((attrs (eshell-file-attributes (directory-file-name file))))
Gerd Moellmann's avatar
Gerd Moellmann committed
471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494
       (if attrs
	   (memq (aref (nth 8 attrs) 0)
		 ,(if (eq type ?%)
		      '(?b ?c)
		    (list 'quote (list type))))))))

(defsubst eshell-pred-file-mode (mode)
  "Return a test which tests that MODE pertains to the file."
  `(lambda (file)
     (let ((modes (file-modes file)))
       (if modes
	   (logand ,mode modes)))))

(defun eshell-pred-file-links ()
  "Return a predicate to test whether a file has a given number of links."
  (let (qual amount)
    (when (memq (char-after) '(?- ?+))
      (setq qual (char-after))
      (forward-char))
    (unless (looking-at "[0-9]+")
      (error "Invalid file link count modifier `l'"))
    (setq amount (string-to-number (match-string 0)))
    (goto-char (match-end 0))
    `(lambda (file)
495
       (let ((attrs (eshell-file-attributes file)))
Gerd Moellmann's avatar
Gerd Moellmann committed
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
	 (if attrs
	     (,(if (eq qual ?-)
		   '<
		 (if (eq qual ?+)
		     '>
		   '=)) (nth 1 attrs) ,amount))))))

(defun eshell-pred-file-size ()
  "Return a predicate to test whether a file is of a given size."
  (let ((quantum 1) qual amount)
    (when (memq (downcase (char-after)) '(?k ?m ?p))
      (setq qual (downcase (char-after)))
      (cond
       ((eq qual ?k)
	(setq quantum 1024))
       ((eq qual ?m)
	(setq quantum (* 1024 1024)))
       ((eq qual ?p)
	(setq quantum 512)))
      (forward-char))
    (when (memq (char-after) '(?- ?+))
      (setq qual (char-after))
      (forward-char))
    (unless (looking-at "[0-9]+")
      (error "Invalid file size modifier `L'"))
    (setq amount (* (string-to-number (match-string 0)) quantum))
    (goto-char (match-end 0))
    `(lambda (file)
524
       (let ((attrs (eshell-file-attributes file)))
Gerd Moellmann's avatar
Gerd Moellmann committed
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
	 (if attrs
	     (,(if (eq qual ?-)
		   '<
		 (if (eq qual ?+)
		     '>
		   '=)) (nth 7 attrs) ,amount))))))

(defun eshell-pred-substitute (&optional repeat)
  "Return a modifier function that will substitute matches."
  (let ((delim (char-after))
	match replace end)
    (forward-char)
    (setq end (eshell-find-delimiter delim delim nil nil t)
	  match (buffer-substring-no-properties (point) end))
    (goto-char (1+ end))
    (setq end (eshell-find-delimiter delim delim nil nil t)
	  replace (buffer-substring-no-properties (point) end))
    (goto-char (1+ end))
    (if repeat
	`(lambda (lst)
	   (mapcar
	    (function
	     (lambda (str)
	       (let ((i 0))
		 (while (setq i (string-match ,match str i))
		   (setq str (replace-match ,replace t nil str))))
	       str)) lst))
      `(lambda (lst)
	 (mapcar
	  (function
	   (lambda (str)
	     (if (string-match ,match str)
		 (setq str (replace-match ,replace t nil str)))
	     str)) lst)))))

(defun eshell-include-members (&optional invert-p)
  "Include only lisp members matching a regexp."
  (let ((delim (char-after))
	regexp end)
    (forward-char)
    (setq end (eshell-find-delimiter delim delim nil nil t)
	  regexp (buffer-substring-no-properties (point) end))
    (goto-char (1+ end))
    `(lambda (lst)
       (eshell-winnow-list
	lst nil '((lambda (elem)
		    ,(if invert-p
			 `(not (string-match ,regexp elem))
		       `(string-match ,regexp elem))))))))

(defun eshell-join-members ()
  "Return a modifier function that join matches."
  (let ((delim (char-after))
	str end)
    (if (not (memq delim '(?' ?/)))
	(setq delim " ")
      (forward-char)
      (setq end (eshell-find-delimiter delim delim nil nil t)
	    str (buffer-substring-no-properties (point) end))
      (goto-char (1+ end)))
    `(lambda (lst)
       (mapconcat 'identity lst ,str))))

(defun eshell-split-members ()
  "Return a modifier function that splits members."
  (let ((delim (char-after))
	sep end)
    (when (memq delim '(?' ?/))
      (forward-char)
      (setq end (eshell-find-delimiter delim delim nil nil t)
	    sep (buffer-substring-no-properties (point) end))
      (goto-char (1+ end)))
    `(lambda (lst)
       (mapcar
	(function
	 (lambda (str)
	   (split-string str ,sep))) lst))))

Miles Bader's avatar
Miles Bader committed
603
;;; arch-tag: 8b5ce022-17f3-4c40-93c7-5faafaa63f31
Gerd Moellmann's avatar
Gerd Moellmann committed
604
;;; em-pred.el ends here