about summary refs log blame commit diff
path: root/configs/shared/emacs/.emacs.d/elpa/f-20180106.922/f.el
blob: 7124debf66fee6b0a4f88733d5e1fcf9c1a86511 (plain) (tree)
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






                                                                                          
                                







































































































































































































































































































































































































































































































































































































































                                                                                                                                                    
;;; f.el --- Modern API for working with files and directories -*- lexical-binding: t; -*-

;; Copyright (C) 2013 Johan Andersson

;; Author: Johan Andersson <johan.rejeep@gmail.com>
;; Maintainer: Johan Andersson <johan.rejeep@gmail.com>
;; Version: 0.20.0
;; Package-Version: 20180106.922
;; Keywords: files, directories
;; URL: http://github.com/rejeep/f.el
;; Package-Requires: ((s "1.7.0") (dash "2.2.0"))

;; This file is NOT part of GNU Emacs.

;;; License:

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Code:



(require 's)
(require 'dash)

(put 'f-guard-error 'error-conditions '(error f-guard-error))
(put 'f-guard-error 'error-message "Destructive operation outside sandbox")

(defvar f--guard-paths nil
  "List of allowed paths to modify when guarded.

Do not modify this variable.")

(defmacro f--destructive (path &rest body)
  "If PATH is allowed to be modified, yield BODY.

If PATH is not allowed to be modified, throw error."
  (declare (indent 1))
  `(if f--guard-paths
       (if (--any? (or (f-same? it ,path)
                       (f-ancestor-of? it ,path)) f--guard-paths)
           (progn ,@body)
         (signal 'f-guard-error (list ,path f--guard-paths)))
     ,@body))


;;;; Paths

(defun f-join (&rest args)
  "Join ARGS to a single path."
  (let (path (relative (f-relative? (car args))))
    (-map
     (lambda (arg)
       (setq path (f-expand arg path)))
     args)
    (if relative (f-relative path) path)))

(defun f-split (path)
  "Split PATH and return list containing parts."
  (let ((parts (s-split (f-path-separator) path 'omit-nulls)))
    (if (f-absolute? path)
        (push (f-path-separator) parts)
      parts)))

(defun f-expand (path &optional dir)
  "Expand PATH relative to DIR (or `default-directory').
PATH and DIR can be either a directory names or directory file
names.  Return a directory name if PATH is a directory name, and
a directory file name otherwise.  File name handlers are
ignored."
  (let (file-name-handler-alist)
    (expand-file-name path dir)))

(defun f-filename (path)
  "Return the name of PATH."
  (file-name-nondirectory (directory-file-name path)))

(defalias 'f-parent 'f-dirname)
(defun f-dirname (path)
  "Return the parent directory to PATH."
  (let ((parent (file-name-directory
                 (directory-file-name (f-expand path default-directory)))))
    (unless (f-same? path parent)
      (if (f-relative? path)
          (f-relative parent)
        (directory-file-name parent)))))

(defun f-common-parent (paths)
  "Return the deepest common parent directory of PATHS."
  (cond
   ((not paths) nil)
   ((not (cdr paths)) (f-parent (car paths)))
   (:otherwise
    (let* ((paths (-map 'f-split paths))
           (common (caar paths))
           (re nil))
      (while (and (not (null (car paths))) (--all? (equal (car it) common) paths))
        (setq paths (-map 'cdr paths))
        (push common re)
        (setq common (caar paths)))
      (cond
       ((null re) "")
       ((and (= (length re) 1) (f-root? (car re)))
        (f-root))
       (:otherwise
        (concat (apply 'f-join (nreverse re)) "/")))))))

(defun f-ext (path)
  "Return the file extension of PATH.

The extension, in a file name, is the part that follows the last
'.', excluding version numbers and backup suffixes."
  (file-name-extension path))

(defun f-no-ext (path)
  "Return everything but the file extension of PATH."
  (file-name-sans-extension path))

(defun f-swap-ext (path ext)
  "Return PATH but with EXT as the new extension.
EXT must not be nil or empty."
  (if (s-blank? ext)
      (error "Extension cannot be empty or nil")
    (concat (f-no-ext path) "." ext)))

(defun f-base (path)
  "Return the name of PATH, excluding the extension of file."
  (f-no-ext (f-filename path)))

(defun f-relative (path &optional dir)
  "Return PATH relative to DIR."
  (file-relative-name path dir))

(defalias 'f-abbrev 'f-short)
(defun f-short (path)
  "Return abbrev of PATH.  See `abbreviate-file-name'."
  (abbreviate-file-name path))

(defun f-long (path)
  "Return long version of PATH."
  (f-expand path))

(defun f-canonical (path)
  "Return the canonical name of PATH."
  (file-truename path))

(defun f-slash (path)
  "Append slash to PATH unless one already.

Some functions, such as `call-process' requires there to be an
ending slash."
  (if (f-dir? path)
      (file-name-as-directory path)
    path))

(defun f-full (path)
  "Return absolute path to PATH, with ending slash."
  (f-slash (f-long path)))

(defun f--uniquify (paths)
  "Helper for `f-uniquify' and `f-uniquify-alist'."
  (let* ((files-length (length paths))
         (uniq-filenames (--map (cons it (f-filename it)) paths))
         (uniq-filenames-next (-group-by 'cdr uniq-filenames)))
    (while (/= files-length (length uniq-filenames-next))
      (setq uniq-filenames-next
            (-group-by 'cdr
                       (--mapcat
                        (let ((conf-files (cdr it)))
                          (if (> (length conf-files) 1)
                              (--map (cons (car it) (concat (f-filename (s-chop-suffix (cdr it) (car it))) (f-path-separator) (cdr it))) conf-files)
                            conf-files))
                        uniq-filenames-next))))
    uniq-filenames-next))

(defun f-uniquify (files)
  "Return unique suffixes of FILES.

This function expects no duplicate paths."
  (-map 'car (f--uniquify files)))

(defun f-uniquify-alist (files)
  "Return alist mapping FILES to unique suffixes of FILES.

This function expects no duplicate paths."
  (-map 'cadr (f--uniquify files)))


;;;; I/O

(defun f-read-bytes (path)
  "Read binary data from PATH.

Return the binary data as unibyte string."
  (with-temp-buffer
    (set-buffer-multibyte nil)
    (setq buffer-file-coding-system 'binary)
    (insert-file-contents-literally path)
    (buffer-substring-no-properties (point-min) (point-max))))

(defalias 'f-read 'f-read-text)
(defun f-read-text (path &optional coding)
  "Read text with PATH, using CODING.

CODING defaults to `utf-8'.

Return the decoded text as multibyte string."
  (decode-coding-string (f-read-bytes path) (or coding 'utf-8)))

(defalias 'f-write 'f-write-text)
(defun f-write-text (text coding path)
  "Write TEXT with CODING to PATH.

TEXT is a multibyte string.  CODING is a coding system to encode
TEXT with.  PATH is a file name to write to."
  (f-write-bytes (encode-coding-string text coding) path))

(defun f-unibyte-string-p (s)
  "Determine whether S is a unibyte string."
  (not (multibyte-string-p s)))

(defun f-write-bytes (data path)
  "Write binary DATA to PATH.

DATA is a unibyte string.  PATH is a file name to write to."
  (f--destructive path
    (unless (f-unibyte-string-p data)
      (signal 'wrong-type-argument (list 'f-unibyte-string-p data)))
    (let ((file-coding-system-alist nil)
          (coding-system-for-write 'binary))
      (with-temp-file path
        (setq buffer-file-coding-system 'binary)
        (set-buffer-multibyte nil)
        (insert data)))))

(defalias 'f-append 'f-append-text)
(defun f-append-text (text coding path)
  "Append TEXT with CODING to PATH.

If PATH does not exist, it is created."
  (f-append-bytes (encode-coding-string text coding) path))

(defun f-append-bytes (data path)
  "Append binary DATA to PATH.

If PATH does not exist, it is created."
  (let ((content
         (if (f-file? path)
             (f-read-bytes path)
           "")))
    (f-write-bytes (concat content data) path)))


;;;; Destructive

(defun f-mkdir (&rest dirs)
  "Create directories DIRS."
  (let (path)
    (-each
        dirs
      (lambda (dir)
        (setq path (f-expand dir path))
        (unless (f-directory? path)
          (f--destructive path (make-directory path)))))))

(defun f-delete (path &optional force)
  "Delete PATH, which can be file or directory.

If FORCE is t, a directory will be deleted recursively."
  (f--destructive path
    (if (or (f-file? path) (f-symlink? path))
        (delete-file path)
      (delete-directory path force))))

(defun f-symlink (source path)
  "Create a symlink to SOURCE from PATH."
  (f--destructive path (make-symbolic-link source path)))

(defun f-move (from to)
  "Move or rename FROM to TO.
If TO is a directory name, move FROM into TO."
  (f--destructive to (rename-file from to t)))

(defun f-copy (from to)
  "Copy file or directory FROM to TO.
If FROM names a directory and TO is a directory name, copy FROM
into TO as a subdirectory."
  (f--destructive to
    (if (f-file? from)
        (copy-file from to)
      ;; The behavior of `copy-directory' differs between Emacs 23 and
      ;; 24 in that in Emacs 23, the contents of `from' is copied to
      ;; `to', while in Emacs 24 the directory `from' is copied to
      ;; `to'. We want the Emacs 24 behavior.
      (if (> emacs-major-version 23)
          (copy-directory from to)
        (if (f-dir? to)
            (progn
              (apply 'f-mkdir (f-split to))
              (let ((new-to (f-expand (f-filename from) to)))
                (copy-directory from new-to)))
          (copy-directory from to))))))

(defun f-copy-contents (from to)
  "Copy contents in directory FROM, to directory TO."
  (unless (f-exists? to)
    (error "Cannot copy contents to non existing directory %s" to))
  (unless (f-dir? from)
    (error "Cannot copy contents as %s is a file" from))
  (--each (f-entries from)
    (f-copy it (file-name-as-directory to))))

(defun f-touch (path)
  "Update PATH last modification date or create if it does not exist."
  (f--destructive path
    (if (f-file? path)
        (set-file-times path)
      (f-write-bytes "" path))))


;;;; Predicates

(defun f-exists? (path)
  "Return t if PATH exists, false otherwise."
  (file-exists-p path))

(defalias 'f-exists-p 'f-exists?)

(defalias 'f-dir? 'f-directory?)
(defalias 'f-dir-p 'f-dir?)

(defun f-directory? (path)
  "Return t if PATH is directory, false otherwise."
  (file-directory-p path))

(defalias 'f-directory-p 'f-directory?)

(defun f-file? (path)
  "Return t if PATH is file, false otherwise."
  (file-regular-p path))

(defalias 'f-file-p 'f-file?)

(defun f-symlink? (path)
  "Return t if PATH is symlink, false otherwise."
  (not (not (file-symlink-p path))))

(defalias 'f-symlink-p 'f-symlink?)

(defun f-readable? (path)
  "Return t if PATH is readable, false otherwise."
  (file-readable-p path))

(defalias 'f-readable-p 'f-readable?)

(defun f-writable? (path)
  "Return t if PATH is writable, false otherwise."
  (file-writable-p path))

(defalias 'f-writable-p 'f-writable?)

(defun f-executable? (path)
  "Return t if PATH is executable, false otherwise."
  (file-executable-p path))

(defalias 'f-executable-p 'f-executable?)

(defun f-absolute? (path)
  "Return t if PATH is absolute, false otherwise."
  (file-name-absolute-p path))

(defalias 'f-absolute-p 'f-absolute?)

(defun f-relative? (path)
  "Return t if PATH is relative, false otherwise."
  (not (f-absolute? path)))

(defalias 'f-relative-p 'f-relative?)

(defun f-root? (path)
  "Return t if PATH is root directory, false otherwise."
  (not (f-parent path)))

(defalias 'f-root-p 'f-root?)

(defun f-ext? (path &optional ext)
  "Return t if extension of PATH is EXT, false otherwise.

If EXT is nil or omitted, return t if PATH has any extension,
false otherwise.

The extension, in a file name, is the part that follows the last
'.', excluding version numbers and backup suffixes."
  (if ext
      (string= (f-ext path) ext)
    (not (eq (f-ext path) nil))))

(defalias 'f-ext-p 'f-ext?)

(defalias 'f-equal? 'f-same?)
(defalias 'f-equal-p 'f-equal?)

(defun f-same? (path-a path-b)
  "Return t if PATH-A and PATH-B are references to same file."
  (when (and (f-exists? path-a)
             (f-exists? path-b))
    (equal
     (f-canonical (directory-file-name (f-expand path-a)))
     (f-canonical (directory-file-name (f-expand path-b))))))

(defalias 'f-same-p 'f-same?)

(defun f-parent-of? (path-a path-b)
  "Return t if PATH-A is parent of PATH-B."
  (--when-let (f-parent path-b)
    (f-same? path-a it)))

(defalias 'f-parent-of-p 'f-parent-of?)

(defun f-child-of? (path-a path-b)
  "Return t if PATH-A is child of PATH-B."
  (--when-let (f-parent path-a)
    (f-same? it path-b)))

(defalias 'f-child-of-p 'f-child-of?)

(defun f-ancestor-of? (path-a path-b)
  "Return t if PATH-A is ancestor of PATH-B."
  (unless (f-same? path-a path-b)
    (s-starts-with? (f-full path-a)
                    (f-full path-b))))

(defalias 'f-ancestor-of-p 'f-ancestor-of?)

(defun f-descendant-of? (path-a path-b)
  "Return t if PATH-A is desendant of PATH-B."
  (unless (f-same? path-a path-b)
    (s-starts-with? (f-full path-b)
                    (f-full path-a))))

(defalias 'f-descendant-of-p 'f-descendant-of?)

(defun f-hidden? (path)
  "Return t if PATH is hidden, nil otherwise."
  (unless (f-exists? path)
    (error "Path does not exist: %s" path))
  (string= (substring path 0 1) "."))

(defalias 'f-hidden-p 'f-hidden?)

(defun f-empty? (path)
  "If PATH is a file, return t if the file in PATH is empty, nil otherwise.
If PATH is directory, return t if directory has no files, nil otherwise."
  (if (f-directory? path)
      (equal (f-files path nil t) nil)
    (= (f-size path) 0)))

(defalias 'f-empty-p 'f-empty?)


;;;; Stats

(defun f-size (path)
  "Return size of PATH.

If PATH is a file, return size of that file.  If PATH is
directory, return sum of all files in PATH."
  (if (f-directory? path)
      (-sum (-map 'f-size (f-files path nil t)))
    (nth 7 (file-attributes path))))

(defun f-depth (path)
  "Return the depth of PATH.

At first, PATH is expanded with `f-expand'.  Then the full path is used to
detect the depth.
'/' will be zero depth,  '/usr' will be one depth.  And so on."
  (- (length (f-split (f-expand path))) 1))


;;;; Misc

(defun f-this-file ()
  "Return path to this file."
  (cond
   (load-in-progress load-file-name)
   ((and (boundp 'byte-compile-current-file) byte-compile-current-file)
    byte-compile-current-file)
   (:else (buffer-file-name))))

(defvar f--path-separator nil
  "A variable to cache result of `f-path-separator'.")

(defun f-path-separator ()
  "Return path separator."
  (or f--path-separator
      (setq f--path-separator (substring (f-join "x" "y") 1 2))))

(defun f-glob (pattern &optional path)
  "Find PATTERN in PATH."
  (file-expand-wildcards
   (f-join (or path default-directory) pattern)))

(defun f--collect-entries (path recursive)
  (let (result
        (entries
         (-reject
          (lambda (file)
            (or
             (equal (f-filename file) ".")
             (equal (f-filename file) "..")))
          (directory-files path t))))
    (cond (recursive
           (-map
            (lambda (entry)
              (if (f-file? entry)
                  (setq result (cons entry result))
                (when (f-directory? entry)
                  (setq result (cons entry result))
                  (setq result (append result (f--collect-entries entry recursive))))))
            entries))
          (t (setq result entries)))
    result))

(defmacro f--entries (path body &optional recursive)
  "Anaphoric version of `f-entries'."
  `(f-entries
    ,path
    (lambda (path)
      (let ((it path))
        ,body))
    ,recursive))

(defun f-entries (path &optional fn recursive)
  "Find all files and directories in PATH.

FN - called for each found file and directory.  If FN returns a thruthy
value, file or directory will be included.
RECURSIVE - Search for files and directories recursive."
  (let ((entries (f--collect-entries path recursive)))
    (if fn (-select fn entries) entries)))

(defmacro f--directories (path body &optional recursive)
  "Anaphoric version of `f-directories'."
  `(f-directories
    ,path
    (lambda (path)
      (let ((it path))
        ,body))
    ,recursive))

(defun f-directories (path &optional fn recursive)
  "Find all directories in PATH.  See `f-entries'."
  (let ((directories (-select 'f-directory? (f--collect-entries path recursive))))
    (if fn (-select fn directories) directories)))

(defmacro f--files (path body &optional recursive)
  "Anaphoric version of `f-files'."
  `(f-files
    ,path
    (lambda (path)
      (let ((it path))
        ,body))
    ,recursive))

(defun f-files (path &optional fn recursive)
  "Find all files in PATH.  See `f-entries'."
  (let ((files (-select 'f-file? (f--collect-entries path recursive))))
    (if fn (-select fn files) files)))

(defmacro f--traverse-upwards (body &optional path)
  "Anaphoric version of `f-traverse-upwards'."
  `(f-traverse-upwards
    (lambda (dir)
      (let ((it dir))
        ,body))
    ,path))

(defun f-traverse-upwards (fn &optional path)
  "Traverse up as long as FN return nil, starting at PATH.

If FN returns a non-nil value, the path sent as argument to FN is
returned.  If no function callback return a non-nil value, nil is
returned."
  (unless path
    (setq path default-directory))
  (when (f-relative? path)
    (setq path (f-expand path)))
  (if (funcall fn path)
      path
    (unless (f-root? path)
      (f-traverse-upwards fn (f-parent path)))))

(defun f-root ()
  "Return absolute root."
  (f-traverse-upwards 'f-root?))

(defmacro f-with-sandbox (path-or-paths &rest body)
  "Only allow PATH-OR-PATHS and decendants to be modified in BODY."
  (declare (indent 1))
  `(let ((paths (if (listp ,path-or-paths)
                    ,path-or-paths
                  (list ,path-or-paths))))
     (unwind-protect
         (let ((f--guard-paths paths))
           ,@body)
       (setq f--guard-paths nil))))

(provide 'f)

;;; f.el ends here