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ae5e4c48 | 1 | ;;; em-pred.el --- argument predicates and modifiers (ala zsh) -*- lexical-binding:t -*- |
affbf647 | 2 | |
ab422c4d | 3 | ;; Copyright (C) 1999-2013 Free Software Foundation, Inc. |
affbf647 | 4 | |
7de5b421 GM |
5 | ;; Author: John Wiegley <johnw@gnu.org> |
6 | ||
affbf647 GM |
7 | ;; This file is part of GNU Emacs. |
8 | ||
4ee57b2a | 9 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
affbf647 | 10 | ;; it under the terms of the GNU General Public License as published by |
4ee57b2a GM |
11 | ;; the Free Software Foundation, either version 3 of the License, or |
12 | ;; (at your option) any later version. | |
affbf647 GM |
13 | |
14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
18 | ||
19 | ;; You should have received a copy of the GNU General Public License | |
4ee57b2a | 20 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
affbf647 | 21 | |
affbf647 GM |
22 | ;;; Commentary: |
23 | ||
24 | ;; Argument predication is used to affect which members of a list are | |
25 | ;; selected for use as argument. This is most useful with globbing, | |
26 | ;; but can be used on any list argument, to select certain members. | |
27 | ;; | |
28 | ;; Argument modifiers are used to manipulate argument values. For | |
29 | ;; example, sorting lists, upcasing words, substituting characters, | |
30 | ;; etc. | |
31 | ;; | |
32 | ;; Here are some examples of how to use argument predication. Most of | |
33 | ;; the predicates and modifiers are modeled after those provided by | |
34 | ;; zsh. | |
35 | ;; | |
36 | ;; ls -ld *(/) ; list all directories | |
37 | ;; ls -l *(@u'johnw') ; list all symlinks owned by 'johnw' | |
38 | ;; bzip2 -9v **/*(a+30) ; compress everything which hasn't been | |
39 | ;; accessed in 30 days | |
40 | ;; echo *.c(:o:R) ; a reversed, sorted list of C files | |
41 | ;; *(^@:U^u0) ; all non-symlinks not owned by 'root', upcased | |
42 | ;; chmod u-x *(U*) : remove exec bit on all executables owned by user | |
43 | ;; | |
44 | ;; See the zsh docs for more on the syntax ([(zsh.info)Filename | |
45 | ;; Generation]). | |
46 | ||
60370d40 PJ |
47 | ;;; Code: |
48 | ||
f87b1284 GM |
49 | (require 'esh-util) |
50 | (require 'esh-arg) | |
dbba8a04 GM |
51 | (eval-when-compile (require 'eshell)) |
52 | ||
3146b070 | 53 | ;;;###autoload |
35ff222c GM |
54 | (progn |
55 | (defgroup eshell-pred nil | |
dbba8a04 GM |
56 | "This module allows for predicates to be applied to globbing |
57 | patterns (similar to zsh), in addition to string modifiers which can | |
58 | be applied either to globbing results, variable references, or just | |
59 | ordinary strings." | |
60 | :tag "Value modifiers and predicates" | |
35ff222c | 61 | :group 'eshell-module)) |
dbba8a04 | 62 | |
affbf647 GM |
63 | ;;; User Variables: |
64 | ||
d783d303 | 65 | (defcustom eshell-pred-load-hook nil |
ec60da52 | 66 | "A list of functions to run when `eshell-pred' is loaded." |
d783d303 | 67 | :version "24.1" ; removed eshell-pred-initialize |
affbf647 GM |
68 | :type 'hook |
69 | :group 'eshell-pred) | |
70 | ||
71 | (defcustom eshell-predicate-alist | |
72 | '((?/ . (eshell-pred-file-type ?d)) ; directories | |
73 | (?. . (eshell-pred-file-type ?-)) ; regular files | |
74 | (?s . (eshell-pred-file-type ?s)) ; sockets | |
75 | (?p . (eshell-pred-file-type ?p)) ; named pipes | |
76 | (?@ . (eshell-pred-file-type ?l)) ; symbolic links | |
77 | (?% . (eshell-pred-file-type ?%)) ; allow user to specify (c def.) | |
78 | (?r . (eshell-pred-file-mode 0400)) ; owner-readable | |
79 | (?w . (eshell-pred-file-mode 0200)) ; owner-writable | |
80 | (?x . (eshell-pred-file-mode 0100)) ; owner-executable | |
81 | (?A . (eshell-pred-file-mode 0040)) ; group-readable | |
82 | (?I . (eshell-pred-file-mode 0020)) ; group-writable | |
83 | (?E . (eshell-pred-file-mode 0010)) ; group-executable | |
84 | (?R . (eshell-pred-file-mode 0004)) ; world-readable | |
85 | (?W . (eshell-pred-file-mode 0002)) ; world-writable | |
86 | (?X . (eshell-pred-file-mode 0001)) ; world-executable | |
87 | (?s . (eshell-pred-file-mode 4000)) ; setuid | |
88 | (?S . (eshell-pred-file-mode 2000)) ; setgid | |
89 | (?t . (eshell-pred-file-mode 1000)) ; sticky bit | |
4f91a816 SM |
90 | (?U . #'(lambda (file) ; owned by effective uid |
91 | (if (file-exists-p file) | |
92 | (= (nth 2 (file-attributes file)) (user-uid))))) | |
93 | ;; (?G . #'(lambda (file) ; owned by effective gid | |
94 | ;; (if (file-exists-p file) | |
95 | ;; (= (nth 2 (file-attributes file)) (user-uid))))) | |
96 | (?* . #'(lambda (file) | |
97 | (and (file-regular-p file) | |
98 | (not (file-symlink-p file)) | |
99 | (file-executable-p file)))) | |
affbf647 GM |
100 | (?l . (eshell-pred-file-links)) |
101 | (?u . (eshell-pred-user-or-group ?u "user" 2 'eshell-user-id)) | |
102 | (?g . (eshell-pred-user-or-group ?g "group" 3 'eshell-group-id)) | |
103 | (?a . (eshell-pred-file-time ?a "access" 4)) | |
104 | (?m . (eshell-pred-file-time ?m "modification" 5)) | |
105 | (?c . (eshell-pred-file-time ?c "change" 6)) | |
106 | (?L . (eshell-pred-file-size))) | |
ec60da52 | 107 | "A list of predicates than can be applied to a globbing pattern. |
affbf647 GM |
108 | The format of each entry is |
109 | ||
110 | (CHAR . PREDICATE-FUNC-SEXP)" | |
111 | :type '(repeat (cons character sexp)) | |
112 | :group 'eshell-pred) | |
113 | ||
114 | (put 'eshell-predicate-alist 'risky-local-variable t) | |
115 | ||
116 | (defcustom eshell-modifier-alist | |
4f91a816 SM |
117 | '((?E . #'(lambda (lst) |
118 | (mapcar | |
119 | (function | |
120 | (lambda (str) | |
121 | (eshell-stringify | |
122 | (car (eshell-parse-argument str))))) lst))) | |
123 | (?L . #'(lambda (lst) (mapcar 'downcase lst))) | |
124 | (?U . #'(lambda (lst) (mapcar 'upcase lst))) | |
125 | (?C . #'(lambda (lst) (mapcar 'capitalize lst))) | |
126 | (?h . #'(lambda (lst) (mapcar 'file-name-directory lst))) | |
affbf647 GM |
127 | (?i . (eshell-include-members)) |
128 | (?x . (eshell-include-members t)) | |
4f91a816 SM |
129 | (?r . #'(lambda (lst) (mapcar 'file-name-sans-extension lst))) |
130 | (?e . #'(lambda (lst) (mapcar 'file-name-extension lst))) | |
131 | (?t . #'(lambda (lst) (mapcar 'file-name-nondirectory lst))) | |
132 | (?q . #'(lambda (lst) (mapcar 'eshell-escape-arg lst))) | |
133 | (?u . #'(lambda (lst) (eshell-uniqify-list lst))) | |
134 | (?o . #'(lambda (lst) (sort lst 'string-lessp))) | |
135 | (?O . #'(lambda (lst) (nreverse (sort lst 'string-lessp)))) | |
affbf647 GM |
136 | (?j . (eshell-join-members)) |
137 | (?S . (eshell-split-members)) | |
138 | (?R . 'reverse) | |
139 | (?g . (progn | |
140 | (forward-char) | |
141 | (if (eq (char-before) ?s) | |
142 | (eshell-pred-substitute t) | |
143 | (error "`g' modifier cannot be used alone")))) | |
144 | (?s . (eshell-pred-substitute))) | |
ec60da52 | 145 | "A list of modifiers than can be applied to an argument expansion. |
affbf647 GM |
146 | The format of each entry is |
147 | ||
148 | (CHAR ENTRYWISE-P MODIFIER-FUNC-SEXP)" | |
149 | :type '(repeat (cons character sexp)) | |
150 | :group 'eshell-pred) | |
151 | ||
152 | (put 'eshell-modifier-alist 'risky-local-variable t) | |
153 | ||
154 | (defvar eshell-predicate-help-string | |
155 | "Eshell predicate quick reference: | |
156 | ||
157 | - follow symbolic references for predicates after the `-' | |
158 | ^ invert sense of predicates after the `^' | |
159 | ||
160 | FILE TYPE: | |
161 | / directories s sockets | |
162 | . regular files p named pipes | |
163 | * executable (files only) @ symbolic links | |
164 | ||
165 | %x file type == `x' (as by ls -l; so `c' = char device, etc.) | |
166 | ||
167 | PERMISSION BITS (for owner/group/world): | |
168 | r/A/R readable s setuid | |
169 | w/I/W writable S setgid | |
170 | x/E/X executable t sticky bit | |
171 | ||
172 | OWNERSHIP: | |
173 | U owned by effective uid | |
174 | u(UID|'user') owned by UID/user | |
175 | g(GID|'group') owned by GID/group | |
176 | ||
177 | FILE ATTRIBUTES: | |
178 | l[+-]N +/-/= N links | |
e1dbe924 | 179 | a[Mwhms][+-](N|'FILE') access time +/-/= N months/weeks/hours/mins/secs |
2a1c966e EZ |
180 | (days if unspecified) if FILE specified, |
181 | use as comparison basis; so a+'file.c' | |
182 | shows files accessed before file.c was | |
183 | last accessed | |
184 | m[Mwhms][+-](N|'FILE') modification time... | |
185 | c[Mwhms][+-](N|'FILE') change time... | |
affbf647 GM |
186 | L[kmp][+-]N file size +/-/= N Kb/Mb/blocks |
187 | ||
188 | EXAMPLES: | |
189 | *(^@) all non-dot files which are not symlinks | |
190 | .#*(^@) all files which are not symbolic links | |
191 | **/.#*(*) all executable files, searched recursively | |
192 | ***/*~f*(-/) recursively (though not traversing symlinks), | |
193 | find all directories (or symlinks referring to | |
194 | directories) whose names do not begin with f. | |
195 | e*(*Lk+50) executables 50k or larger beginning with 'e'") | |
196 | ||
197 | (defvar eshell-modifier-help-string | |
198 | "Eshell modifier quick reference: | |
199 | ||
200 | FOR SINGLE ARGUMENTS, or each argument of a list of strings: | |
8bc5e4c1 | 201 | E evaluate again |
affbf647 GM |
202 | L lowercase |
203 | U uppercase | |
204 | C capitalize | |
205 | h dirname | |
206 | t basename | |
207 | e file extension | |
208 | r strip file extension | |
209 | q escape special characters | |
210 | ||
211 | S split string at any whitespace character | |
f9f196c6 | 212 | S/PAT/ split string at each occurrence of PAT |
affbf647 GM |
213 | |
214 | FOR LISTS OF ARGUMENTS: | |
215 | o sort alphabetically | |
216 | O reverse sort alphabetically | |
217 | u uniq list (typically used after :o or :O) | |
218 | R reverse list | |
219 | ||
220 | j join list members, separated by a space | |
221 | j/PAT/ join list members, separated by PAT | |
222 | i/PAT/ exclude all members not matching PAT | |
223 | x/PAT/ exclude all members matching PAT | |
224 | ||
225 | s/pat/match/ substitute PAT with MATCH | |
f9f196c6 | 226 | g/pat/match/ substitute PAT with MATCH for all occurrences |
affbf647 GM |
227 | |
228 | EXAMPLES: | |
229 | *.c(:o) sorted list of .c files") | |
230 | ||
231 | ;;; Functions: | |
232 | ||
233 | (defun eshell-display-predicate-help () | |
234 | (interactive) | |
235 | (with-electric-help | |
236 | (function | |
237 | (lambda () | |
238 | (insert eshell-predicate-help-string))))) | |
239 | ||
240 | (defun eshell-display-modifier-help () | |
241 | (interactive) | |
242 | (with-electric-help | |
243 | (function | |
244 | (lambda () | |
245 | (insert eshell-modifier-help-string))))) | |
246 | ||
247 | (defun eshell-pred-initialize () | |
248 | "Initialize the predicate/modifier code." | |
affbf647 GM |
249 | (add-hook 'eshell-parse-argument-hook |
250 | 'eshell-parse-arg-modifier t t) | |
251 | (define-key eshell-command-map [(meta ?q)] 'eshell-display-predicate-help) | |
252 | (define-key eshell-command-map [(meta ?m)] 'eshell-display-modifier-help)) | |
253 | ||
254 | (defun eshell-apply-modifiers (lst predicates modifiers) | |
255 | "Apply to LIST a series of PREDICATES and MODIFIERS." | |
256 | (let (stringified) | |
257 | (if (stringp lst) | |
258 | (setq lst (list lst) | |
259 | stringified t)) | |
260 | (when (listp lst) | |
261 | (setq lst (eshell-winnow-list lst nil predicates)) | |
262 | (while modifiers | |
263 | (setq lst (funcall (car modifiers) lst) | |
264 | modifiers (cdr modifiers))) | |
265 | (if (and stringified | |
266 | (= (length lst) 1)) | |
267 | (car lst) | |
268 | lst)))) | |
269 | ||
270 | (defun eshell-parse-arg-modifier () | |
271 | "Parse a modifier that has been specified after an argument. | |
272 | This function is specially for adding onto `eshell-parse-argument-hook'." | |
273 | (when (eq (char-after) ?\() | |
274 | (forward-char) | |
275 | (let ((end (eshell-find-delimiter ?\( ?\)))) | |
276 | (if (not end) | |
277 | (throw 'eshell-incomplete ?\() | |
278 | (when (eshell-arg-delimiter (1+ end)) | |
279 | (save-restriction | |
280 | (narrow-to-region (point) end) | |
281 | (let* ((modifiers (eshell-parse-modifiers)) | |
282 | (preds (car modifiers)) | |
283 | (mods (cdr modifiers))) | |
284 | (if (or preds mods) | |
285 | ;; has to go at the end, which is only natural since | |
286 | ;; syntactically it can only occur at the end | |
287 | (setq eshell-current-modifiers | |
288 | (append | |
289 | eshell-current-modifiers | |
290 | (list | |
291 | `(lambda (lst) | |
292 | (eshell-apply-modifiers | |
293 | lst (quote ,preds) (quote ,mods))))))))) | |
294 | (goto-char (1+ end)) | |
295 | (eshell-finish-arg)))))) | |
296 | ||
297 | (defun eshell-parse-modifiers () | |
298 | "Parse value modifiers and predicates at point. | |
299 | If ALLOW-PREDS is non-nil, predicates will be parsed as well. | |
300 | Return a cons cell of the form | |
301 | ||
302 | (PRED-FUNC-LIST . MOD-FUNC-LIST) | |
303 | ||
304 | NEW-STRING is STRING minus any modifiers. PRED-FUNC-LIST is a list of | |
305 | predicate functions. MOD-FUNC-LIST is a list of result modifier | |
306 | functions. PRED-FUNCS take a filename and return t if the test | |
307 | succeeds; MOD-FUNCS take any string and preform a modification, | |
308 | returning the resultant string." | |
309 | (let (result negate follow preds mods) | |
170266d0 | 310 | (condition-case nil |
affbf647 GM |
311 | (while (not (eobp)) |
312 | (let ((char (char-after))) | |
313 | (cond | |
314 | ((eq char ?') | |
315 | (forward-char) | |
316 | (if (looking-at "[^|':]") | |
317 | (let ((func (read (current-buffer)))) | |
318 | (if (and func (functionp func)) | |
319 | (setq preds (eshell-add-pred-func func preds | |
320 | negate follow)) | |
321 | (error "Invalid function predicate '%s'" | |
322 | (eshell-stringify func)))) | |
323 | (error "Invalid function predicate"))) | |
324 | ((eq char ?^) | |
325 | (forward-char) | |
326 | (setq negate (not negate))) | |
327 | ((eq char ?-) | |
328 | (forward-char) | |
329 | (setq follow (not follow))) | |
330 | ((eq char ?|) | |
331 | (forward-char) | |
332 | (if (looking-at "[^|':]") | |
333 | (let ((func (read (current-buffer)))) | |
334 | (if (and func (functionp func)) | |
335 | (setq mods | |
336 | (cons `(lambda (lst) | |
337 | (mapcar (function ,func) lst)) | |
338 | mods)) | |
339 | (error "Invalid function modifier '%s'" | |
340 | (eshell-stringify func)))) | |
341 | (error "Invalid function modifier"))) | |
342 | ((eq char ?:) | |
343 | (forward-char) | |
344 | (let ((mod (assq (char-after) eshell-modifier-alist))) | |
345 | (if (not mod) | |
346 | (error "Unknown modifier character '%c'" (char-after)) | |
347 | (forward-char) | |
348 | (setq mods (cons (eval (cdr mod)) mods))))) | |
349 | (t | |
350 | (let ((pred (assq char eshell-predicate-alist))) | |
351 | (if (not pred) | |
352 | (error "Unknown predicate character '%c'" char) | |
353 | (forward-char) | |
354 | (setq preds | |
355 | (eshell-add-pred-func (eval (cdr pred)) preds | |
356 | negate follow)))))))) | |
357 | (end-of-buffer | |
358 | (error "Predicate or modifier ended prematurely"))) | |
359 | (cons (nreverse preds) (nreverse mods)))) | |
360 | ||
361 | (defun eshell-add-pred-func (pred funcs negate follow) | |
362 | "Add the predicate function PRED to FUNCS." | |
363 | (if negate | |
364 | (setq pred `(lambda (file) | |
365 | (not (funcall ,pred file))))) | |
366 | (if follow | |
367 | (setq pred `(lambda (file) | |
368 | (funcall ,pred (file-truename file))))) | |
369 | (cons pred funcs)) | |
370 | ||
371 | (defun eshell-pred-user-or-group (mod-char mod-type attr-index get-id-func) | |
372 | "Return a predicate to test whether a file match a given user/group id." | |
373 | (let (ugid open close end) | |
374 | (if (looking-at "[0-9]+") | |
375 | (progn | |
376 | (setq ugid (string-to-number (match-string 0))) | |
377 | (goto-char (match-end 0))) | |
378 | (setq open (char-after)) | |
379 | (if (setq close (memq open '(?\( ?\[ ?\< ?\{))) | |
380 | (setq close (car (last '(?\) ?\] ?\> ?\}) | |
381 | (length close)))) | |
382 | (setq close open)) | |
383 | (forward-char) | |
384 | (setq end (eshell-find-delimiter open close)) | |
385 | (unless end | |
386 | (error "Malformed %s name string for modifier `%c'" | |
387 | mod-type mod-char)) | |
388 | (setq ugid | |
389 | (funcall get-id-func (buffer-substring (point) end))) | |
390 | (goto-char (1+ end))) | |
391 | (unless ugid | |
392 | (error "Unknown %s name specified for modifier `%c'" | |
393 | mod-type mod-char)) | |
394 | `(lambda (file) | |
395 | (let ((attrs (file-attributes file))) | |
396 | (if attrs | |
397 | (= (nth ,attr-index attrs) ,ugid)))))) | |
398 | ||
399 | (defun eshell-pred-file-time (mod-char mod-type attr-index) | |
400 | "Return a predicate to test whether a file matches a certain time." | |
401 | (let* ((quantum 86400) | |
402 | qual amount when open close end) | |
2a1c966e | 403 | (when (memq (char-after) '(?M ?w ?h ?m ?s)) |
affbf647 GM |
404 | (setq quantum (char-after)) |
405 | (cond | |
406 | ((eq quantum ?M) | |
407 | (setq quantum (* 60 60 24 30))) | |
408 | ((eq quantum ?w) | |
409 | (setq quantum (* 60 60 24 7))) | |
410 | ((eq quantum ?h) | |
411 | (setq quantum (* 60 60))) | |
412 | ((eq quantum ?m) | |
413 | (setq quantum 60)) | |
414 | ((eq quantum ?s) | |
415 | (setq quantum 1))) | |
416 | (forward-char)) | |
417 | (when (memq (char-after) '(?+ ?-)) | |
418 | (setq qual (char-after)) | |
419 | (forward-char)) | |
420 | (if (looking-at "[0-9]+") | |
421 | (progn | |
73171bd4 | 422 | (setq when (- (float-time) |
affbf647 GM |
423 | (* (string-to-number (match-string 0)) |
424 | quantum))) | |
425 | (goto-char (match-end 0))) | |
426 | (setq open (char-after)) | |
427 | (if (setq close (memq open '(?\( ?\[ ?\< ?\{))) | |
428 | (setq close (car (last '(?\) ?\] ?\> ?\}) | |
429 | (length close)))) | |
430 | (setq close open)) | |
431 | (forward-char) | |
432 | (setq end (eshell-find-delimiter open close)) | |
433 | (unless end | |
434 | (error "Malformed %s time modifier `%c'" mod-type mod-char)) | |
435 | (let* ((file (buffer-substring (point) end)) | |
436 | (attrs (file-attributes file))) | |
437 | (unless attrs | |
438 | (error "Cannot stat file `%s'" file)) | |
73171bd4 | 439 | (setq when (float-time (nth attr-index attrs)))) |
affbf647 GM |
440 | (goto-char (1+ end))) |
441 | `(lambda (file) | |
442 | (let ((attrs (file-attributes file))) | |
443 | (if attrs | |
444 | (,(if (eq qual ?-) | |
445 | '< | |
446 | (if (eq qual ?+) | |
447 | '> | |
73171bd4 | 448 | '=)) ,when (float-time |
affbf647 GM |
449 | (nth ,attr-index attrs)))))))) |
450 | ||
451 | (defun eshell-pred-file-type (type) | |
452 | "Return a test which tests that the file is of a certain TYPE. | |
453 | TYPE must be a character, and should be one of the possible options | |
454 | that 'ls -l' will show in the first column of its display. " | |
455 | (when (eq type ?%) | |
456 | (setq type (char-after)) | |
457 | (if (memq type '(?b ?c)) | |
458 | (forward-char) | |
459 | (setq type ?%))) | |
460 | `(lambda (file) | |
8c6b1d83 | 461 | (let ((attrs (eshell-file-attributes (directory-file-name file)))) |
affbf647 GM |
462 | (if attrs |
463 | (memq (aref (nth 8 attrs) 0) | |
464 | ,(if (eq type ?%) | |
465 | '(?b ?c) | |
466 | (list 'quote (list type)))))))) | |
467 | ||
468 | (defsubst eshell-pred-file-mode (mode) | |
469 | "Return a test which tests that MODE pertains to the file." | |
470 | `(lambda (file) | |
471 | (let ((modes (file-modes file))) | |
472 | (if modes | |
473 | (logand ,mode modes))))) | |
474 | ||
475 | (defun eshell-pred-file-links () | |
476 | "Return a predicate to test whether a file has a given number of links." | |
477 | (let (qual amount) | |
478 | (when (memq (char-after) '(?- ?+)) | |
479 | (setq qual (char-after)) | |
480 | (forward-char)) | |
481 | (unless (looking-at "[0-9]+") | |
482 | (error "Invalid file link count modifier `l'")) | |
483 | (setq amount (string-to-number (match-string 0))) | |
484 | (goto-char (match-end 0)) | |
485 | `(lambda (file) | |
8c6b1d83 | 486 | (let ((attrs (eshell-file-attributes file))) |
affbf647 GM |
487 | (if attrs |
488 | (,(if (eq qual ?-) | |
489 | '< | |
490 | (if (eq qual ?+) | |
491 | '> | |
492 | '=)) (nth 1 attrs) ,amount)))))) | |
493 | ||
494 | (defun eshell-pred-file-size () | |
495 | "Return a predicate to test whether a file is of a given size." | |
496 | (let ((quantum 1) qual amount) | |
497 | (when (memq (downcase (char-after)) '(?k ?m ?p)) | |
498 | (setq qual (downcase (char-after))) | |
499 | (cond | |
500 | ((eq qual ?k) | |
501 | (setq quantum 1024)) | |
502 | ((eq qual ?m) | |
503 | (setq quantum (* 1024 1024))) | |
504 | ((eq qual ?p) | |
505 | (setq quantum 512))) | |
506 | (forward-char)) | |
507 | (when (memq (char-after) '(?- ?+)) | |
508 | (setq qual (char-after)) | |
509 | (forward-char)) | |
510 | (unless (looking-at "[0-9]+") | |
511 | (error "Invalid file size modifier `L'")) | |
512 | (setq amount (* (string-to-number (match-string 0)) quantum)) | |
513 | (goto-char (match-end 0)) | |
514 | `(lambda (file) | |
8c6b1d83 | 515 | (let ((attrs (eshell-file-attributes file))) |
affbf647 GM |
516 | (if attrs |
517 | (,(if (eq qual ?-) | |
518 | '< | |
519 | (if (eq qual ?+) | |
520 | '> | |
521 | '=)) (nth 7 attrs) ,amount)))))) | |
522 | ||
523 | (defun eshell-pred-substitute (&optional repeat) | |
524 | "Return a modifier function that will substitute matches." | |
525 | (let ((delim (char-after)) | |
526 | match replace end) | |
527 | (forward-char) | |
528 | (setq end (eshell-find-delimiter delim delim nil nil t) | |
529 | match (buffer-substring-no-properties (point) end)) | |
530 | (goto-char (1+ end)) | |
531 | (setq end (eshell-find-delimiter delim delim nil nil t) | |
532 | replace (buffer-substring-no-properties (point) end)) | |
533 | (goto-char (1+ end)) | |
534 | (if repeat | |
535 | `(lambda (lst) | |
536 | (mapcar | |
537 | (function | |
538 | (lambda (str) | |
539 | (let ((i 0)) | |
540 | (while (setq i (string-match ,match str i)) | |
541 | (setq str (replace-match ,replace t nil str)))) | |
542 | str)) lst)) | |
543 | `(lambda (lst) | |
544 | (mapcar | |
545 | (function | |
546 | (lambda (str) | |
547 | (if (string-match ,match str) | |
548 | (setq str (replace-match ,replace t nil str))) | |
549 | str)) lst))))) | |
550 | ||
551 | (defun eshell-include-members (&optional invert-p) | |
552 | "Include only lisp members matching a regexp." | |
553 | (let ((delim (char-after)) | |
554 | regexp end) | |
555 | (forward-char) | |
556 | (setq end (eshell-find-delimiter delim delim nil nil t) | |
557 | regexp (buffer-substring-no-properties (point) end)) | |
558 | (goto-char (1+ end)) | |
559 | `(lambda (lst) | |
560 | (eshell-winnow-list | |
561 | lst nil '((lambda (elem) | |
562 | ,(if invert-p | |
563 | `(not (string-match ,regexp elem)) | |
564 | `(string-match ,regexp elem)))))))) | |
565 | ||
566 | (defun eshell-join-members () | |
567 | "Return a modifier function that join matches." | |
568 | (let ((delim (char-after)) | |
569 | str end) | |
570 | (if (not (memq delim '(?' ?/))) | |
571 | (setq delim " ") | |
572 | (forward-char) | |
573 | (setq end (eshell-find-delimiter delim delim nil nil t) | |
574 | str (buffer-substring-no-properties (point) end)) | |
575 | (goto-char (1+ end))) | |
576 | `(lambda (lst) | |
577 | (mapconcat 'identity lst ,str)))) | |
578 | ||
579 | (defun eshell-split-members () | |
580 | "Return a modifier function that splits members." | |
581 | (let ((delim (char-after)) | |
582 | sep end) | |
583 | (when (memq delim '(?' ?/)) | |
584 | (forward-char) | |
585 | (setq end (eshell-find-delimiter delim delim nil nil t) | |
586 | sep (buffer-substring-no-properties (point) end)) | |
587 | (goto-char (1+ end))) | |
588 | `(lambda (lst) | |
589 | (mapcar | |
590 | (function | |
591 | (lambda (str) | |
592 | (split-string str ,sep))) lst)))) | |
593 | ||
dbba8a04 GM |
594 | (provide 'em-pred) |
595 | ||
3146b070 GM |
596 | ;; Local Variables: |
597 | ;; generated-autoload-file: "esh-groups.el" | |
598 | ;; End: | |
599 | ||
affbf647 | 600 | ;;; em-pred.el ends here |