summaryrefslogtreecommitdiff
path: root/lisp/eshell/em-ls.el
blob: 4ddf88626189963703b5a48fb86aca5165bb4025 (plain)
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
;;; em-ls.el --- implementation of ls in Lisp  -*- lexical-binding:t -*-

;; Copyright (C) 1999-2014 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 <http://www.gnu.org/licenses/>.

;;; Commentary:

;; Most of the command switches recognized by GNU's ls utility are
;; supported ([(fileutils)ls invocation]).

;;; Code:

(require 'cl-lib)
(require 'esh-util)
(require 'esh-opt)
(eval-when-compile (require 'eshell))

;;;###autoload
(progn
(defgroup eshell-ls nil
  "This module implements the \"ls\" utility fully in Lisp.  If it is
passed any unrecognized command switches, it will revert to the
operating system's version.  This version of \"ls\" uses text
properties to colorize its output based on the setting of
`eshell-ls-use-colors'."
  :tag "Implementation of `ls' in Lisp"
  :group 'eshell-module))

;;; User Variables:

(defcustom eshell-ls-date-format "%Y-%m-%d"
  "How to display time information in `eshell-ls-file'.
This is passed to `format-time-string' as a format string.
To display the date using the current locale, use \"%b \%e\"."
  :version "24.1"
  :type 'string)

(defcustom eshell-ls-initial-args nil
  "If non-nil, this list of args is included before any call to `ls'.
This is useful for enabling human-readable format (-h), for example."
  :type '(repeat :tag "Arguments" string))

(defcustom eshell-ls-dired-initial-args nil
  "If non-nil, args is included before any call to `ls' in Dired.
This is useful for enabling human-readable format (-h), for example."
  :type '(repeat :tag "Arguments" string))

(defcustom eshell-ls-use-in-dired nil
  "If non-nil, use `eshell-ls' to read directories in Dired.
Changing this without using customize has no effect."
  :set (lambda (symbol value)
	 (if value
             (advice-add 'insert-directory :around
                         #'eshell-ls--insert-directory)
           (advice-remove 'insert-directory
                          #'eshell-ls--insert-directory))
         (set symbol value))
  :type 'boolean
  :require 'em-ls)
(add-hook 'eshell-ls-unload-hook
          (lambda () (advice-remove 'insert-directory
                               #'eshell-ls--insert-directory)))


(defcustom eshell-ls-default-blocksize 1024
  "The default blocksize to use when display file sizes with -s."
  :type 'integer)

(defcustom eshell-ls-exclude-regexp nil
  "Unless -a is specified, files matching this regexp will not be shown."
  :type '(choice regexp (const nil)))

(defcustom eshell-ls-exclude-hidden t
  "Unless -a is specified, files beginning with . will not be shown.
Using this boolean, instead of `eshell-ls-exclude-regexp', is both
faster and conserves more memory."
  :type 'boolean)

(defcustom eshell-ls-use-colors t
  "If non-nil, use colors in file listings."
  :type 'boolean)

(defface eshell-ls-directory
  '((((class color) (background light)) (:foreground "Blue" :weight bold))
    (((class color) (background dark)) (:foreground "SkyBlue" :weight bold))
    (t (:weight bold)))
  "The face used for highlighting directories.")
(define-obsolete-face-alias 'eshell-ls-directory-face
  'eshell-ls-directory "22.1")

(defface eshell-ls-symlink
  '((((class color) (background light)) (:foreground "Dark Cyan" :weight bold))
    (((class color) (background dark)) (:foreground "Cyan" :weight bold)))
  "The face used for highlighting symbolic links.")
(define-obsolete-face-alias 'eshell-ls-symlink-face 'eshell-ls-symlink "22.1")

(defface eshell-ls-executable
  '((((class color) (background light)) (:foreground "ForestGreen" :weight bold))
    (((class color) (background dark)) (:foreground "Green" :weight bold)))
  "The face used for highlighting executables (not directories, though).")
(define-obsolete-face-alias 'eshell-ls-executable-face
  'eshell-ls-executable "22.1")

(defface eshell-ls-readonly
  '((((class color) (background light)) (:foreground "Brown"))
    (((class color) (background dark)) (:foreground "Pink")))
  "The face used for highlighting read-only files.")
(define-obsolete-face-alias 'eshell-ls-readonly-face 'eshell-ls-readonly "22.1")

(defface eshell-ls-unreadable
  '((((class color) (background light)) (:foreground "Grey30"))
    (((class color) (background dark)) (:foreground "DarkGrey")))
  "The face used for highlighting unreadable files.")
(define-obsolete-face-alias 'eshell-ls-unreadable-face
  'eshell-ls-unreadable "22.1")

(defface eshell-ls-special
  '((((class color) (background light)) (:foreground "Magenta" :weight bold))
    (((class color) (background dark)) (:foreground "Magenta" :weight bold)))
  "The face used for highlighting non-regular files.")
(define-obsolete-face-alias 'eshell-ls-special-face 'eshell-ls-special "22.1")

(defface eshell-ls-missing
  '((((class color) (background light)) (:foreground "Red" :weight bold))
    (((class color) (background dark)) (:foreground "Red" :weight bold)))
  "The face used for highlighting non-existent file names.")
(define-obsolete-face-alias 'eshell-ls-missing-face 'eshell-ls-missing "22.1")

(defcustom eshell-ls-archive-regexp
  (concat "\\.\\(t\\(a[rz]\\|gz\\)\\|arj\\|lzh\\|"
	  "zip\\|[zZ]\\|gz\\|bz2\\|xz\\|deb\\|rpm\\)\\'")
  "A regular expression that matches names of file archives.
This typically includes both traditional archives and compressed
files."
  :version "24.1"			; added xz
  :type 'regexp)

(defface eshell-ls-archive
  '((((class color) (background light)) (:foreground "Orchid" :weight bold))
    (((class color) (background dark)) (:foreground "Orchid" :weight bold)))
  "The face used for highlighting archived and compressed file names.")
(define-obsolete-face-alias 'eshell-ls-archive-face 'eshell-ls-archive "22.1")

(defcustom eshell-ls-backup-regexp
  "\\(\\`\\.?#\\|\\(\\.bak\\|~\\)\\'\\)"
  "A regular expression that matches names of backup files."
  :type 'regexp)

(defface eshell-ls-backup
  '((((class color) (background light)) (:foreground "OrangeRed"))
    (((class color) (background dark)) (:foreground "LightSalmon")))
  "The face used for highlighting backup file names.")
(define-obsolete-face-alias 'eshell-ls-backup-face 'eshell-ls-backup "22.1")

(defcustom eshell-ls-product-regexp
  "\\.\\(elc\\|o\\(bj\\)?\\|a\\|lib\\|res\\)\\'"
  "A regular expression that matches names of product files.
Products are files that get generated from a source file, and hence
ought to be recreatable if they are deleted."
  :type 'regexp)

(defface eshell-ls-product
  '((((class color) (background light)) (:foreground "OrangeRed"))
    (((class color) (background dark)) (:foreground "LightSalmon")))
  "The face used for highlighting files that are build products.")
(define-obsolete-face-alias 'eshell-ls-product-face 'eshell-ls-product "22.1")

(defcustom eshell-ls-clutter-regexp
  "\\(^texput\\.log\\|^core\\)\\'"
  "A regular expression that matches names of junk files.
These are mainly files that get created for various reasons, but don't
really need to stick around for very long."
  :type 'regexp)

(defface eshell-ls-clutter
  '((((class color) (background light)) (:foreground "OrangeRed" :weight bold))
    (((class color) (background dark)) (:foreground "OrangeRed" :weight bold)))
  "The face used for highlighting junk file names.")
(define-obsolete-face-alias 'eshell-ls-clutter-face 'eshell-ls-clutter "22.1")

(defsubst eshell-ls-filetype-p (attrs type)
  "Test whether ATTRS specifies a directory."
  (if (nth 8 attrs)
      (eq (aref (nth 8 attrs) 0) type)))

(defmacro eshell-ls-applicable (attrs index func file)
  "Test whether, for ATTRS, the user can do what corresponds to INDEX.
ATTRS is a string of file modes.  See `file-attributes'.
If we cannot determine the answer using ATTRS (e.g., if we need
to know what group the user is in), compute the return value by
calling FUNC with FILE as an argument."
  `(let ((owner (nth 2 ,attrs))
	 (modes (nth 8 ,attrs)))
     (cond ((cond ((numberp owner)
		   (= owner (user-uid)))
		  ((stringp owner)
		   (or (string-equal owner (user-login-name))
		       (member owner (eshell-current-ange-uids)))))
	    ;; The user owns this file.
	    (not (eq (aref modes ,index) ?-)))
	   ((eq (aref modes (+ ,index 3))
		(aref modes (+ ,index 6)))
	    ;; If the "group" and "other" fields give identical
	    ;; results, use that.
	    (not (eq (aref modes (+ ,index 3)) ?-)))
	   (t
	    ;; Otherwise call FUNC.
	    (,(eval func) ,file)))))

(defcustom eshell-ls-highlight-alist nil
  "This alist correlates test functions to color.
The format of the members of this alist is

  (TEST-SEXP . FACE)

If TEST-SEXP evals to non-nil, that face will be used to highlight the
name of the file.  The first match wins.  `file' and `attrs' are in
scope during the evaluation of TEST-SEXP."
  :type '(repeat (cons function face)))

(defvar block-size)
(defvar dereference-links)
(defvar dir-literal)
(defvar error-func)
(defvar flush-func)
(defvar human-readable)
(defvar ignore-pattern)
(defvar insert-func)
(defvar listing-style)
(defvar numeric-uid-gid)
(defvar reverse-list)
(defvar show-all)
(defvar show-almost-all)
(defvar show-recursive)
(defvar show-size)
(defvar sort-method)
(defvar ange-cache)
(defvar dired-flag)

;;; Functions:

(defun eshell-ls--insert-directory
  (orig-fun file switches &optional wildcard full-directory-p)
  "Insert directory listing for FILE, formatted according to SWITCHES.
Leaves point after the inserted text.
SWITCHES may be a string of options, or a list of strings.
Optional third arg WILDCARD means treat FILE as shell wildcard.
Optional fourth arg FULL-DIRECTORY-P means file is a directory and
switches do not contain `d', so that a full listing is expected.

This version of the function uses `eshell/ls'.  If any of the switches
passed are not recognized, the operating system's version will be used
instead."
  (if (not eshell-ls-use-in-dired)
      (funcall orig-fun file switches wildcard full-directory-p)
    (let ((handler (find-file-name-handler file 'insert-directory)))
      (if handler
          (funcall handler 'insert-directory file switches
                   wildcard full-directory-p)
        (if (stringp switches)
            (setq switches (split-string switches)))
        (let (eshell-current-handles
              eshell-current-subjob-p
              font-lock-mode)
          ;; use the fancy highlighting in `eshell-ls' rather than font-lock
          (when (and eshell-ls-use-colors
                     (featurep 'font-lock))
            (font-lock-mode -1)
            (setq font-lock-defaults nil)
            (if (boundp 'font-lock-buffers)
                (set 'font-lock-buffers
                     (delq (current-buffer)
                           (symbol-value 'font-lock-buffers)))))
          (let ((insert-func 'insert)
                (error-func 'insert)
                (flush-func 'ignore)
                eshell-ls-dired-initial-args)
            (eshell-do-ls (append switches (list file)))))))))

(defsubst eshell/ls (&rest args)
  "An alias version of `eshell-do-ls'."
  (let ((insert-func 'eshell-buffered-print)
	(error-func 'eshell-error)
	(flush-func 'eshell-flush))
    (apply 'eshell-do-ls args)))

(put 'eshell/ls 'eshell-no-numeric-conversions t)

(declare-function eshell-glob-regexp "em-glob" (pattern))

(defun eshell-do-ls (&rest args)
  "Implementation of \"ls\" in Lisp, passing ARGS."
  (funcall flush-func -1)
  ;; Process the command arguments, and begin listing files.
  (eshell-eval-using-options
   "ls" (if eshell-ls-initial-args
	    (list eshell-ls-initial-args args)
	  args)
   `((?a "all" nil show-all
	 "do not ignore entries starting with .")
     (?A "almost-all" nil show-almost-all
	 "do not list implied . and ..")
     (?c nil by-ctime sort-method
	 "sort by last status change time")
     (?d "directory" nil dir-literal
	 "list directory entries instead of contents")
     (?k "kilobytes" 1024 block-size
	 "using 1024 as the block size")
     (?h "human-readable" 1024 human-readable
	 "print sizes in human readable format")
     (?H "si" 1000 human-readable
	 "likewise, but use powers of 1000 not 1024")
     (?I "ignore" t ignore-pattern
	 "do not list implied entries matching pattern")
     (?l nil long-listing listing-style
	 "use a long listing format")
     (?n "numeric-uid-gid" nil numeric-uid-gid
	 "list numeric UIDs and GIDs instead of names")
     (?r "reverse" nil reverse-list
	 "reverse order while sorting")
     (?s "size" nil show-size
	 "print size of each file, in blocks")
     (?t nil by-mtime sort-method
	 "sort by modification time")
     (?u nil by-atime sort-method
	 "sort by last access time")
     (?x nil by-lines listing-style
	 "list entries by lines instead of by columns")
     (?C nil by-columns listing-style
	 "list entries by columns")
     (?L "dereference" nil dereference-links
	 "list entries pointed to by symbolic links")
     (?R "recursive" nil show-recursive
	 "list subdirectories recursively")
     (?S nil by-size sort-method
	 "sort by file size")
     (?U nil unsorted sort-method
	 "do not sort; list entries in directory order")
     (?X nil by-extension sort-method
	 "sort alphabetically by entry extension")
     (?1 nil single-column listing-style
	 "list one file per line")
     (nil "dired" nil dired-flag
	  "Here for compatibility with GNU ls.")
     (nil "help" nil nil
	  "show this usage display")
     :external "ls"
     :usage "[OPTION]... [FILE]...
List information about the FILEs (the current directory by default).
Sort entries alphabetically across.")
   ;; setup some defaults, based on what the user selected
   (unless block-size
     (setq block-size eshell-ls-default-blocksize))
   (unless listing-style
     (setq listing-style 'by-columns))
   (unless args
     (setq args (list ".")))
   (let ((eshell-ls-exclude-regexp eshell-ls-exclude-regexp) ange-cache)
     (when ignore-pattern
       (unless (eshell-using-module 'eshell-glob)
	 (error (concat "-I option requires that `eshell-glob'"
			" be a member of `eshell-modules-list'")))
       (set-text-properties 0 (length ignore-pattern) nil ignore-pattern)
       (setq eshell-ls-exclude-regexp
	     (if eshell-ls-exclude-regexp
		 (concat "\\(" eshell-ls-exclude-regexp "\\|"
			 (eshell-glob-regexp ignore-pattern) "\\)")
	       (eshell-glob-regexp ignore-pattern))))
     ;; list the files!
     (eshell-ls-entries
      (mapcar (lambda (arg)
		(cons (if (and (eshell-under-windows-p)
			       (file-name-absolute-p arg))
			  (expand-file-name arg)
			arg)
		      (eshell-file-attributes
		       arg (if numeric-uid-gid 'integer 'string))))
	      args)
      t (expand-file-name default-directory)))
   (funcall flush-func)))

(defsubst eshell-ls-printable-size (filesize &optional by-blocksize)
  "Return a printable FILESIZE."
  (eshell-printable-size filesize human-readable
			 (and by-blocksize block-size)
			 eshell-ls-use-colors))

(defsubst eshell-ls-size-string (attrs size-width)
  "Return the size string for ATTRS length, using SIZE-WIDTH."
  (let* ((str (eshell-ls-printable-size (nth 7 attrs) t))
	 (len (length str)))
    (if (< len size-width)
	(concat (make-string (- size-width len) ? ) str)
      str)))

(defun eshell-ls-annotate (fileinfo)
  "Given a FILEINFO object, return a resolved, decorated FILEINFO.
This means resolving any symbolic links, determining what face the
name should be displayed as, etc.  Think of it as cooking a FILEINFO."
  (if (not (and (stringp (cadr fileinfo))
		(or dereference-links
		    (eq listing-style 'long-listing))))
      (setcar fileinfo (eshell-ls-decorated-name fileinfo))
    (let (dir attr)
      (unless (file-name-absolute-p (cadr fileinfo))
	(setq dir (file-truename
		   (file-name-directory
		    (expand-file-name (car fileinfo))))))
      (setq attr
	    (eshell-file-attributes
	     (let ((target (if dir
			       (expand-file-name (cadr fileinfo) dir)
			     (cadr fileinfo))))
	       (if dereference-links
		   (file-truename target)
		 target))))
      (if (or dereference-links
	      (string-match "^\\.\\.?$" (car fileinfo)))
	  (progn
	    (setcdr fileinfo attr)
	    (setcar fileinfo (eshell-ls-decorated-name fileinfo)))
	(cl-assert (eq listing-style 'long-listing))
	(setcar fileinfo
		(concat (eshell-ls-decorated-name fileinfo) " -> "
			(eshell-ls-decorated-name
			 (cons (cadr fileinfo) attr)))))))
  fileinfo)

(defun eshell-ls-file (fileinfo &optional size-width copy-fileinfo)
  "Output FILE in long format.
FILE may be a string, or a cons cell whose car is the filename and
whose cdr is the list of file attributes."
  (if (not (cdr fileinfo))
      (funcall error-func (format "%s: No such file or directory\n"
				  (car fileinfo)))
    (setq fileinfo
	  (eshell-ls-annotate (if copy-fileinfo
				  (cons (car fileinfo)
					(cdr fileinfo))
				fileinfo)))
    (let ((file (car fileinfo))
	  (attrs (cdr fileinfo)))
      (if (not (eq listing-style 'long-listing))
	  (if show-size
	      (funcall insert-func (eshell-ls-size-string attrs size-width)
		       " " file "\n")
	    (funcall insert-func file "\n"))
	(let ((line
	       (concat
		(if show-size
		    (concat (eshell-ls-size-string attrs size-width) " "))
		(format
		 (if numeric-uid-gid
		     "%s%4d %-8s %-8s "
		   "%s%4d %-14s %-8s ")
		 (or (nth 8 attrs) "??????????")
		 (or (nth 1 attrs) 0)
		 (or (let ((user (nth 2 attrs)))
		       (and (stringp user)
			    (eshell-substring user 14)))
		     (nth 2 attrs)
		     "")
		 (or (let ((group (nth 3 attrs)))
		       (and (stringp group)
			    (eshell-substring group 8)))
		     (nth 3 attrs)
		     ""))
		(let* ((str (eshell-ls-printable-size (nth 7 attrs)))
		       (len (length str)))
		  ;; Let file sizes shorter than 9 align neatly.
		  (if (< len (or size-width 8))
		      (concat (make-string (- (or size-width 8) len) ? ) str)
		    str))
		" " (format-time-string
		     (concat
		      eshell-ls-date-format " "
		      (if (= (nth 5 (decode-time))
			     (nth 5 (decode-time
				     (nth (cond
					   ((eq sort-method 'by-atime) 4)
					   ((eq sort-method 'by-ctime) 6)
					   (t 5)) attrs))))
			  "%H:%M"
			" %Y")) (nth (cond
			((eq sort-method 'by-atime) 4)
			((eq sort-method 'by-ctime) 6)
			(t 5)) attrs)) " ")))
	  (funcall insert-func line file "\n"))))))

(defun eshell-ls-dir (dirinfo &optional insert-name root-dir size-width)
  "Output the entries in DIRINFO.
If INSERT-NAME is non-nil, the name of DIRINFO will be output.  If
ROOT-DIR is also non-nil, and a directory name, DIRINFO will be output
relative to that directory."
  (let ((dir (car dirinfo)))
    (if (not (cdr dirinfo))
	(funcall error-func (format "%s: No such file or directory\n" dir))
      (if dir-literal
	  (eshell-ls-file dirinfo size-width)
	(if insert-name
	    (funcall insert-func
		     (eshell-ls-decorated-name
		      (cons (concat
			     (if root-dir
				 (file-relative-name dir root-dir)
			       (expand-file-name dir)))
			    (cdr dirinfo))) ":\n"))
	(let ((entries (eshell-directory-files-and-attributes
			dir nil (and (not (or show-all show-almost-all))
				     eshell-ls-exclude-hidden
				     "\\`[^.]") t
				     ;; Asking for UID and GID as
				     ;; strings saves another syscall
				     ;; later when we are going to
				     ;; display user and group names.
				     (if numeric-uid-gid 'integer 'string))))
          (when (and show-almost-all
                     (not show-all))
            (setq entries
                  (cl-remove-if
                   (lambda (entry)
                     (member (car entry) '("." "..")))
                   entries)))
	  (when (and (not (or show-all show-almost-all))
                     eshell-ls-exclude-regexp)
	    (while (and entries (string-match eshell-ls-exclude-regexp
					      (caar entries)))
	      (setq entries (cdr entries)))
	    (let ((e entries))
	      (while (cdr e)
		(if (string-match eshell-ls-exclude-regexp (car (cadr e)))
		    (setcdr e (cddr e))
		  (setq e (cdr e))))))
	  (when (or (eq listing-style 'long-listing) show-size)
	    (let ((total 0.0))
	      (setq size-width 0)
	      (dolist (e entries)
		(if (nth 7 (cdr e))
		    (setq total (+ total (nth 7 (cdr e)))
			  size-width
			  (max size-width
			       (length (eshell-ls-printable-size
					(nth 7 (cdr e))
					(not
					 ;; If we are under -l, count length
					 ;; of sizes in bytes, not in blocks.
					 (eq listing-style 'long-listing))))))))
	      (funcall insert-func "total "
		       (eshell-ls-printable-size total t) "\n")))
	  (let ((default-directory (expand-file-name dir)))
	    (if show-recursive
		(eshell-ls-entries
		 (let ((e entries) (good-entries (list t)))
		   (while e
		     (unless (let ((len (length (caar e))))
			       (and (eq (aref (caar e) 0) ?.)
				    (or (= len 1)
					(and (= len 2)
					     (eq (aref (caar e) 1) ?.)))))
		       (nconc good-entries (list (car e))))
		     (setq e (cdr e)))
		   (cdr good-entries))
		 nil root-dir)
	      (eshell-ls-files (eshell-ls-sort-entries entries)
			       size-width))))))))

(defsubst eshell-ls-compare-entries (l r inx func)
  "Compare the time of two files, L and R, the attribute indexed by INX."
  (let ((lt (nth inx (cdr l)))
	(rt (nth inx (cdr r))))
    (if (equal lt rt)
	(string-lessp (directory-file-name (car l))
		      (directory-file-name (car r)))
      (funcall func rt lt))))

(defun eshell-ls-sort-entries (entries)
  "Sort the given ENTRIES, which may be files, directories or both.
In Eshell's implementation of ls, ENTRIES is always reversed."
  (if (eq sort-method 'unsorted)
      (nreverse entries)
    (sort entries
	  (function
	   (lambda (l r)
	     (let ((result
		    (cond
		     ((eq sort-method 'by-atime)
		      (eshell-ls-compare-entries l r 4 'time-less-p))
		     ((eq sort-method 'by-mtime)
		      (eshell-ls-compare-entries l r 5 'time-less-p))
		     ((eq sort-method 'by-ctime)
		      (eshell-ls-compare-entries l r 6 'time-less-p))
		     ((eq sort-method 'by-size)
		      (eshell-ls-compare-entries l r 7 '<))
		     ((eq sort-method 'by-extension)
		      (let ((lx (file-name-extension
				 (directory-file-name (car l))))
			    (rx (file-name-extension
				 (directory-file-name (car r)))))
			(cond
			 ((or (and (not lx) (not rx))
			      (equal lx rx))
			  (string-lessp (directory-file-name (car l))
					(directory-file-name (car r))))
			 ((not lx) t)
			 ((not rx) nil)
			 (t
			  (string-lessp lx rx)))))
		     (t
		      (string-lessp (directory-file-name (car l))
				    (directory-file-name (car r)))))))
	       (if reverse-list
		   (not result)
		 result)))))))

(defun eshell-ls-files (files &optional size-width copy-fileinfo)
  "Output a list of FILES.
Each member of FILES is either a string or a cons cell of the form
\(FILE .  ATTRS)."
  ;; Mimic behavior of coreutils ls, which lists a single file per
  ;; line when output is not a tty.  Exceptions: if -x was supplied,
  ;; or if we are the _last_ command in a pipeline.
  ;; FIXME Not really the same since not testing output destination.
  (if (or (and eshell-in-pipeline-p
	       (not (eq eshell-in-pipeline-p 'last))
	       (not (eq listing-style 'by-lines)))
	  (memq listing-style '(long-listing single-column)))
      (dolist (file files)
	(if file
	    (eshell-ls-file file size-width copy-fileinfo)))
    (let ((f files)
	  last-f
	  display-files
	  ignore)
      (while f
	(if (cdar f)
	    (setq last-f f
		  f (cdr f))
	  (unless ignore
	    (funcall error-func
		     (format "%s: No such file or directory\n" (caar f))))
	  (if (eq f files)
	      (setq files (cdr files)
		    f files)
	    (if (not (cdr f))
		(progn
		  (setcdr last-f nil)
		  (setq f nil))
	      (setcar f (cadr f))
	      (setcdr f (cddr f))))))
      (if (not show-size)
	  (setq display-files (mapcar 'eshell-ls-annotate files))
	(dolist (file files)
	  (let* ((str (eshell-ls-printable-size (nth 7 (cdr file)) t))
		 (len (length str)))
	    (if (< len size-width)
		(setq str (concat (make-string (- size-width len) ? ) str)))
	    (setq file (eshell-ls-annotate file)
		  display-files (cons (cons (concat str " " (car file))
					    (cdr file))
				      display-files))))
	(setq display-files (nreverse display-files)))
      (let* ((col-vals
	      (if (eq listing-style 'by-columns)
		  (eshell-ls-find-column-lengths display-files)
		(cl-assert (eq listing-style 'by-lines))
		(eshell-ls-find-column-widths display-files)))
	     (col-widths (car col-vals))
	     (display-files (cdr col-vals))
	     (columns (length col-widths))
	     (col-index 1)
	     need-return)
	(dolist (file display-files)
	  (let ((name
		 (if (car file)
		     (if show-size
			 (concat (substring (car file) 0 size-width)
				 (eshell-ls-decorated-name
				  (cons (substring (car file) size-width)
					(cdr file))))
		       (eshell-ls-decorated-name file))
		   "")))
	    (if (< col-index columns)
		(setq need-return
		      (concat need-return name
			      (make-string
			       (max 0 (- (aref col-widths
					       (1- col-index))
					 (length name))) ? ))
		      col-index (1+ col-index))
	      (funcall insert-func need-return name "\n")
	      (setq col-index 1 need-return nil))))
	(if need-return
	    (funcall insert-func need-return "\n"))))))

(defun eshell-ls-entries (entries &optional separate root-dir)
  "Output PATH's directory ENTRIES.
Each member of ENTRIES may either be a string or a cons cell, the car
of which is the file name, and the cdr of which is the list of
attributes.
If SEPARATE is non-nil, directories name will be entirely separated
from the filenames.  This is the normal behavior, except when doing a
recursive listing.
ROOT-DIR, if non-nil, specifies the root directory of the listing, to
which non-absolute directory names will be made relative if ever they
need to be printed."
  (let (dirs files show-names need-return (size-width 0))
    (dolist (entry entries)
      (if (and (not dir-literal)
	       (or (eshell-ls-filetype-p (cdr entry) ?d)
		   (and (eshell-ls-filetype-p (cdr entry) ?l)
			(file-directory-p (car entry)))))
	  (progn
	    (unless separate
	      (setq files (cons entry files)
		    size-width
		    (if show-size
			(max size-width
			     (length (eshell-ls-printable-size
				      (nth 7 (cdr entry)) t))))))
	    (setq dirs (cons entry dirs)))
	(setq files (cons entry files)
	      size-width
	      (if show-size
		  (max size-width
		       (length (eshell-ls-printable-size
				(nth 7 (cdr entry)) t)))))))
    (when files
      (eshell-ls-files (eshell-ls-sort-entries files)
		       size-width show-recursive)
      (setq need-return t))
    (setq show-names (or show-recursive
			 (> (+ (length files) (length dirs)) 1)))
    (dolist (dir (eshell-ls-sort-entries dirs))
      (if (and need-return (not dir-literal))
	  (funcall insert-func "\n"))
      (eshell-ls-dir dir show-names
		     (unless (file-name-absolute-p (car dir)) root-dir)
		     size-width)
      (setq need-return t))))

(defun eshell-ls-find-column-widths (files)
  "Find the best fitting column widths for FILES.
It will be returned as a vector, whose length is the number of columns
to use, and each member of which is the width of that column
\(including spacing)."
  (let* ((numcols 0)
	 (width 0)
	 (widths
	  (mapcar
	   (function
	    (lambda (file)
	      (+ 2 (length (car file)))))
	   files))
	 ;; must account for the added space...
	 (max-width (+ (window-width) 2))
	 (best-width 0)
	 col-widths)

    ;; determine the largest number of columns in the first row
    (let ((w widths))
      (while (and w (< width max-width))
	(setq width (+ width (car w))
	      numcols (1+ numcols)
	      w (cdr w))))

    ;; refine it based on the following rows
    (while (> numcols 0)
      (let ((i 0)
	    (colw (make-vector numcols 0))
	    (w widths))
	(while w
	  (if (= i numcols)
	      (setq i 0))
	  (aset colw i (max (aref colw i) (car w)))
	  (setq w (cdr w) i (1+ i)))
	(setq i 0 width 0)
	(while (< i numcols)
	  (setq width (+ width (aref colw i))
		i (1+ i)))
	(if (and (< width max-width)
		 (> width best-width))
	    (setq col-widths colw
		  best-width width)))
      (setq numcols (1- numcols)))

    (cons (or col-widths (vector max-width)) files)))

(defun eshell-ls-find-column-lengths (files)
  "Find the best fitting column lengths for FILES.
It will be returned as a vector, whose length is the number of columns
to use, and each member of which is the width of that column
\(including spacing)."
  (let* ((numcols 1)
	 (width 0)
	 (widths
	  (mapcar
	   (function
	    (lambda (file)
	      (+ 2 (length (car file)))))
	   files))
	 (max-width (+ (window-width) 2))
	 col-widths
	 colw)

    ;; refine it based on the following rows
    (while numcols
      (let* ((rows (ceiling (/ (length widths)
			       (float numcols))))
	     (w widths)
	     (len (* rows numcols))
	     (index 0)
	     (i 0))
	(setq width 0)
	(unless (or (= rows 0)
		    (<= (/ (length widths) (float rows))
			(float (1- numcols))))
	  (setq colw (make-vector numcols 0))
	  (while (> len 0)
	    (if (= i numcols)
		(setq i 0 index (1+ index)))
	    (aset colw i
		  (max (aref colw i)
		       (or (nth (+ (* i rows) index) w) 0)))
	    (setq len (1- len) i (1+ i)))
	  (setq i 0)
	  (while (< i numcols)
	    (setq width (+ width (aref colw i))
		  i (1+ i))))
	(if (>= width max-width)
	    (setq numcols nil)
	  (if colw
	      (setq col-widths colw))
	  (if (>= numcols (length widths))
	      (setq numcols nil)
	    (setq numcols (1+ numcols))))))

    (if (not col-widths)
	(cons (vector max-width) files)
      (setq numcols (length col-widths))
      (let* ((rows (ceiling (/ (length widths)
			       (float numcols))))
	     (len (* rows numcols))
	     (newfiles (make-list len nil))
	     (index 0)
	     (i 0)
	     (j 0))
	(while (< j len)
	  (if (= i numcols)
	      (setq i 0 index (1+ index)))
	  (setcar (nthcdr j newfiles)
		  (nth (+ (* i rows) index) files))
	  (setq j (1+ j) i (1+ i)))
	(cons col-widths newfiles)))))

(defun eshell-ls-decorated-name (file)
  "Return FILE, possibly decorated."
  (if eshell-ls-use-colors
      (let ((face
	     (cond
	      ((not (cdr file))
	       'eshell-ls-missing)

	      ((stringp (cadr file))
	       'eshell-ls-symlink)

	      ((eq (cadr file) t)
	       'eshell-ls-directory)

	      ((not (eshell-ls-filetype-p (cdr file) ?-))
	       'eshell-ls-special)

	      ((and (/= (user-uid) 0) ; root can execute anything
		    (eshell-ls-applicable (cdr file) 3
					  'file-executable-p (car file)))
	       'eshell-ls-executable)

	      ((not (eshell-ls-applicable (cdr file) 1
					  'file-readable-p (car file)))
	       'eshell-ls-unreadable)

	      ((string-match eshell-ls-archive-regexp (car file))
	       'eshell-ls-archive)

	      ((string-match eshell-ls-backup-regexp (car file))
	       'eshell-ls-backup)

	      ((string-match eshell-ls-product-regexp (car file))
	       'eshell-ls-product)

	      ((string-match eshell-ls-clutter-regexp (car file))
	       'eshell-ls-clutter)

	      ((not (eshell-ls-applicable (cdr file) 2
					  'file-writable-p (car file)))
	       'eshell-ls-readonly)
	      (eshell-ls-highlight-alist
	       (let ((tests eshell-ls-highlight-alist)
		     value)
		 (while tests
		   (if (funcall (caar tests) (car file) (cdr file))
		       (setq value (cdar tests) tests nil)
		     (setq tests (cdr tests))))
		 value)))))
	(if face
	    (add-text-properties 0 (length (car file))
				 (list 'font-lock-face face)
				 (car file)))))
  (car file))

(provide 'em-ls)

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

;;; em-ls.el ends here