aboutsummaryrefslogtreecommitdiff
path: root/emacs/guix-command.el
blob: ddafac92f17eaf2a0dddba5ed8c761d45660c013 (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
;;; guix-command.el --- Popup interface for guix commands  -*- lexical-binding: t -*-

;; Copyright © 2015 Alex Kost <alezost@gmail.com>

;; This file is part of GNU Guix.

;; GNU Guix 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 Guix 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 this program.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;; This file provides a magit-like popup interface for running guix
;; commands in Guix REPL.  The entry point is "M-x guix".  When it is
;; called the first time, "guix --help" output is parsed and
;; `guix-COMMAND-action' functions are generated for each available guix
;; COMMAND.  Then a window with these commands is popped up.  When a
;; particular COMMAND is called, "guix COMMAND --help" output is parsed,
;; and a user get a new popup window with available options for this
;; command and so on.

;; To avoid hard-coding all guix options, actions, etc., as much data is
;; taken from "guix ... --help" outputs as possible.  But this data is
;; still incomplete: not all long options have short analogs, also
;; special readers should be used for some options (for example, to
;; complete package names while prompting for a package).  So after
;; parsing --help output, the arguments are "improved".  All arguments
;; (switches, options and actions) are `guix-command-argument'
;; structures.

;; Only "M-x guix" command is available after this file is loaded.  The
;; rest commands/actions/popups are generated on the fly only when they
;; are needed (that's why there is a couple of `eval'-s in this file).

;; COMMANDS argument is used by many functions in this file.  It means a
;; list of guix commands without "guix" itself, e.g.: ("build"),
;; ("import" "gnu").  The empty list stands for the plain "guix" without
;; subcommands.

;; All actions in popup windows are divided into 2 groups:
;;
;; - 'Popup' actions - used to pop up another window.  For example, every
;;   action in the 'guix' or 'guix import' window is a popup action.  They
;;   are defined by `guix-command-define-popup-action' macro.
;;
;; - 'Execute' actions - used to do something with the command line (to
;;   run a command in Guix REPL or to copy it into kill-ring) constructed
;;   with the current popup.  They are defined by
;;   `guix-command-define-execute-action' macro.

;;; Code:

(require 'cl-lib)
(require 'guix-popup)
(require 'guix-utils)
(require 'guix-help-vars)
(require 'guix-read)
(require 'guix-base)
(require 'guix-external)

(defgroup guix-commands nil
  "Settings for guix popup windows."
  :group 'guix)

(defvar guix-command-complex-with-shared-arguments
  '("system")
  "List of guix commands which have subcommands with shared options.
I.e., 'guix foo --help' is the same as 'guix foo bar --help'.")

(defun guix-command-action-name (&optional commands &rest name-parts)
  "Return name of action function for guix COMMANDS."
  (guix-command-symbol (append commands name-parts (list "action"))))


;;; Command arguments

(cl-defstruct (guix-command-argument
               (:constructor guix-command-make-argument)
               (:copier      guix-command-copy-argument))
  name char doc fun switch? option? action?)

(cl-defun guix-command-modify-argument
    (argument &key
              (name    nil name-bound?)
              (char    nil char-bound?)
              (doc     nil doc-bound?)
              (fun     nil fun-bound?)
              (switch? nil switch?-bound?)
              (option? nil option?-bound?)
              (action? nil action?-bound?))
  "Return a modified version of ARGUMENT."
  (declare (indent 1))
  (let ((copy (guix-command-copy-argument argument)))
    (and name-bound?    (setf (guix-command-argument-name    copy) name))
    (and char-bound?    (setf (guix-command-argument-char    copy) char))
    (and doc-bound?     (setf (guix-command-argument-doc     copy) doc))
    (and fun-bound?     (setf (guix-command-argument-fun     copy) fun))
    (and switch?-bound? (setf (guix-command-argument-switch? copy) switch?))
    (and option?-bound? (setf (guix-command-argument-option? copy) option?))
    (and action?-bound? (setf (guix-command-argument-action? copy) action?))
    copy))

(defun guix-command-modify-argument-from-alist (argument alist)
  "Return a modified version of ARGUMENT or nil if it wasn't modified.
Each assoc from ALIST have a form (NAME . PLIST).  NAME is an
argument name.  PLIST is a property list of argument parameters
to be modified."
  (let* ((name  (guix-command-argument-name argument))
         (plist (guix-assoc-value alist name)))
    (when plist
      (apply #'guix-command-modify-argument
             argument plist))))

(defmacro guix-command-define-argument-improver (name alist)
  "Define NAME variable and function to modify an argument from ALIST."
  (declare (indent 1))
  `(progn
     (defvar ,name ,alist)
     (defun ,name (argument)
       (guix-command-modify-argument-from-alist argument ,name))))

(guix-command-define-argument-improver
    guix-command-improve-action-argument
  '(("graph"       :char ?G)
    ("environment" :char ?E)
    ("publish"     :char ?u)
    ("pull"        :char ?P)
    ("size"        :char ?z)))

(guix-command-define-argument-improver
    guix-command-improve-common-argument
  '(("--help"    :switch? nil)
    ("--version" :switch? nil)))

(guix-command-define-argument-improver
    guix-command-improve-target-argument
  '(("--target" :char ?T)))

(guix-command-define-argument-improver
    guix-command-improve-system-type-argument
  '(("--system" :fun guix-read-system-type)))

(guix-command-define-argument-improver
    guix-command-improve-load-path-argument
  '(("--load-path" :fun read-directory-name)))

(guix-command-define-argument-improver
    guix-command-improve-search-paths-argument
  '(("--search-paths" :char ?P)))

(guix-command-define-argument-improver
    guix-command-improve-substitute-urls-argument
  '(("--substitute-urls" :char ?U)))

(guix-command-define-argument-improver
    guix-command-improve-hash-argument
  '(("--format" :fun guix-read-hash-format)))

(guix-command-define-argument-improver
    guix-command-improve-key-policy-argument
  '(("--key-download" :fun guix-read-key-policy)))

(defvar guix-command-improve-common-build-argument
  '(("--no-substitutes"  :char ?s)
    ("--no-build-hook"   :char ?h)
    ("--max-silent-time" :char ?x)))

(defun guix-command-improve-common-build-argument (argument)
  (guix-command-modify-argument-from-alist
   argument
   (append guix-command-improve-load-path-argument
           guix-command-improve-substitute-urls-argument
           guix-command-improve-common-build-argument)))

(guix-command-define-argument-improver
    guix-command-improve-archive-argument
  '(("--generate-key" :char ?k)))

(guix-command-define-argument-improver
    guix-command-improve-build-argument
  '(("--no-grafts"   :char ?g)
    ("--root"        :fun guix-read-file-name)
    ("--sources"     :char ?S :fun guix-read-source-type :switch? nil)
    ("--with-source" :fun guix-read-file-name)))

(guix-command-define-argument-improver
    guix-command-improve-environment-argument
  '(("--exec" :fun read-shell-command)
    ("--load" :fun guix-read-file-name)))

(guix-command-define-argument-improver
    guix-command-improve-gc-argument
  '(("--list-dead" :char ?D)
    ("--list-live" :char ?L)
    ("--referrers" :char ?f)
    ("--verify"    :fun guix-read-verify-options-string)))

(guix-command-define-argument-improver
    guix-command-improve-graph-argument
  '(("--type" :fun guix-read-graph-type)))

(guix-command-define-argument-improver
    guix-command-improve-import-argument
  '(("cran" :char ?r)))

(guix-command-define-argument-improver
    guix-command-improve-import-elpa-argument
  '(("--archive" :fun guix-read-elpa-archive)))

(guix-command-define-argument-improver
    guix-command-improve-lint-argument
  '(("--checkers" :fun guix-read-lint-checker-names-string)))

(guix-command-define-argument-improver
    guix-command-improve-package-argument
  ;; Unlike all other options, --install/--remove do not have a form
  ;; '--install=foo,bar' but '--install foo bar' instead, so we need
  ;; some tweaks.
  '(("--install"
     :name "--install " :fun guix-read-package-names-string
     :switch? nil :option? t)
    ("--remove"
     :name "--remove "  :fun guix-read-package-names-string
     :switch? nil :option? t)
    ("--install-from-file" :fun guix-read-file-name)
    ("--manifest"       :fun guix-read-file-name)
    ("--do-not-upgrade" :char ?U)
    ("--roll-back"      :char ?R)
    ("--show"           :char ?w :fun guix-read-package-name)))

(guix-command-define-argument-improver
    guix-command-improve-refresh-argument
  '(("--select"     :fun guix-read-refresh-subset)
    ("--key-server" :char ?S)))

(guix-command-define-argument-improver
    guix-command-improve-size-argument
  '(("--map-file" :fun guix-read-file-name)))

(guix-command-define-argument-improver
    guix-command-improve-system-argument
  '(("vm-image"    :char ?V)
    ("--on-error"  :char ?E)
    ("--no-grub"   :char ?g)
    ("--full-boot" :char ?b)))

(defvar guix-command-argument-improvers
  '((()
     guix-command-improve-action-argument)
    (("archive")
     guix-command-improve-common-build-argument
     guix-command-improve-target-argument
     guix-command-improve-system-type-argument
     guix-command-improve-archive-argument)
    (("build")
     guix-command-improve-common-build-argument
     guix-command-improve-target-argument
     guix-command-improve-system-type-argument
     guix-command-improve-build-argument)
    (("download")
     guix-command-improve-hash-argument)
    (("hash")
     guix-command-improve-hash-argument)
    (("environment")
     guix-command-improve-common-build-argument
     guix-command-improve-search-paths-argument
     guix-command-improve-system-type-argument
     guix-command-improve-environment-argument)
    (("gc")
     guix-command-improve-gc-argument)
    (("graph")
     guix-command-improve-graph-argument)
    (("import")
     guix-command-improve-import-argument)
    (("import" "gnu")
     guix-command-improve-key-policy-argument)
    (("import" "elpa")
     guix-command-improve-import-elpa-argument)
    (("lint")
     guix-command-improve-lint-argument)
    (("package")
     guix-command-improve-common-build-argument
     guix-command-improve-search-paths-argument
     guix-command-improve-package-argument)
    (("refresh")
     guix-command-improve-key-policy-argument
     guix-command-improve-refresh-argument)
    (("size")
     guix-command-improve-system-type-argument
     guix-command-improve-substitute-urls-argument
     guix-command-improve-size-argument)
    (("system")
     guix-command-improve-common-build-argument
     guix-command-improve-system-argument))
  "Alist of guix commands and argument improvers for them.")

(defun guix-command-improve-argument (argument improvers)
  "Return ARGUMENT modified with IMPROVERS."
  (or (guix-any (lambda (improver)
                  (funcall improver argument))
                improvers)
      argument))

(defun guix-command-improve-arguments (arguments commands)
  "Return ARGUMENTS for 'guix COMMANDS ...' modified for popup interface."
  (let ((improvers (cons 'guix-command-improve-common-argument
                         (guix-assoc-value guix-command-argument-improvers
                                           commands))))
    (mapcar (lambda (argument)
              (guix-command-improve-argument argument improvers))
            arguments)))

(defun guix-command-parse-arguments (&optional commands)
  "Return a list of parsed 'guix COMMANDS ...' arguments."
  (with-temp-buffer
    (insert (guix-help-string commands))
    (let (args)
      (guix-while-search guix-help-parse-option-regexp
        (let* ((short (match-string-no-properties 1))
               (name  (match-string-no-properties 2))
               (arg   (match-string-no-properties 3))
               (doc   (match-string-no-properties 4))
               (char  (if short
                          (elt short 1) ; short option letter
                        (elt name 2))) ; first letter of the long option
               ;; If "--foo=bar" or "--foo[=bar]" then it is 'option'.
               (option? (not (string= "" arg)))
               ;; If "--foo" or "--foo[=bar]" then it is 'switch'.
               (switch? (or (string= "" arg)
                            (eq ?\[ (elt arg 0)))))
          (push (guix-command-make-argument
                 :name    name
                 :char    char
                 :doc     doc
                 :switch? switch?
                 :option? option?)
                args)))
      (guix-while-search guix-help-parse-command-regexp
        (let* ((name (match-string-no-properties 1))
               (char (elt name 0)))
          (push (guix-command-make-argument
                 :name    name
                 :char    char
                 :fun     (guix-command-action-name commands name)
                 :action? t)
                args)))
      args)))

(defun guix-command-rest-argument (&optional commands)
  "Return '--' argument for COMMANDS."
  (cl-flet ((argument (&rest args)
              (apply #'guix-command-make-argument
                     :name "-- " :char ?= :option? t args)))
    (let ((command (car commands)))
      (cond
       ((member command '("archive" "build" "graph" "edit"
                          "environment" "lint" "refresh"))
        (argument :doc "Packages" :fun 'guix-read-package-names-string))
       ((string= command "download")
        (argument :doc "URL"))
       ((string= command "gc")
        (argument :doc "Paths" :fun 'guix-read-file-name))
       ((member command '("hash" "system"))
        (argument :doc "File" :fun 'guix-read-file-name))
       ((string= command "size")
        (argument :doc "Package" :fun 'guix-read-package-name))
       ((equal commands '("import" "nix"))
        (argument :doc "Nixpkgs Attribute"))
       ;; Other 'guix import' subcommands, but not 'import' itself.
       ((and (cdr commands)
             (string= command "import"))
        (argument :doc "Package name"))))))

(defun guix-command-additional-arguments (&optional commands)
  "Return additional arguments for COMMANDS."
  (let ((rest-arg (guix-command-rest-argument commands)))
    (and rest-arg (list rest-arg))))

;; Ideally only `guix-command-arguments' function should exist with the
;; contents of `guix-command-all-arguments', but we need to make a
;; special case for `guix-command-complex-with-shared-arguments' commands.

(defun guix-command-all-arguments (&optional commands)
  "Return list of all arguments for 'guix COMMANDS ...'."
  (let ((parsed (guix-command-parse-arguments commands)))
    (append (guix-command-improve-arguments parsed commands)
            (guix-command-additional-arguments commands))))

(guix-memoized-defalias guix-command-all-arguments-memoize
  guix-command-all-arguments)

(defun guix-command-arguments (&optional commands)
  "Return list of arguments for 'guix COMMANDS ...'."
  (let ((command (car commands)))
    (if (member command
                guix-command-complex-with-shared-arguments)
        ;; Take actions only for 'guix system', and switches+options for
        ;; 'guix system foo'.
        (funcall (if (null (cdr commands))
                     #'cl-remove-if-not
                   #'cl-remove-if)
                 #'guix-command-argument-action?
                 (guix-command-all-arguments-memoize (list command)))
      (guix-command-all-arguments commands))))

(defun guix-command-switch->popup-switch (switch)
  "Return popup switch from command SWITCH argument."
  (list (guix-command-argument-char switch)
        (or (guix-command-argument-doc switch)
            "Unknown")
        (guix-command-argument-name switch)))

(defun guix-command-option->popup-option (option)
  "Return popup option from command OPTION argument."
  (list (guix-command-argument-char option)
        (or (guix-command-argument-doc option)
            "Unknown")
        (let ((name (guix-command-argument-name option)))
          (if (string-match-p " \\'" name) ; ends with space
              name
            (concat name "=")))
        (or (guix-command-argument-fun option)
            'read-from-minibuffer)))

(defun guix-command-action->popup-action (action)
  "Return popup action from command ACTION argument."
  (list (guix-command-argument-char action)
        (or (guix-command-argument-doc action)
            (guix-command-argument-name action)
            "Unknown")
        (guix-command-argument-fun action)))

(defun guix-command-sort-arguments (arguments)
  "Sort ARGUMENTS by name in alphabetical order."
  (sort arguments
        (lambda (a1 a2)
          (let ((name1 (guix-command-argument-name a1))
                (name2 (guix-command-argument-name a2)))
            (cond ((null name1) nil)
                  ((null name2) t)
                  (t (string< name1 name2)))))))

(defun guix-command-switches (arguments)
  "Return switches from ARGUMENTS."
  (cl-remove-if-not #'guix-command-argument-switch? arguments))

(defun guix-command-options (arguments)
  "Return options from ARGUMENTS."
  (cl-remove-if-not #'guix-command-argument-option? arguments))

(defun guix-command-actions (arguments)
  "Return actions from ARGUMENTS."
  (cl-remove-if-not #'guix-command-argument-action? arguments))

(defun guix-command-post-process-args (args)
  "Adjust appropriately command line ARGS returned from popup command."
  ;; XXX We need to split "--install foo bar" and similar strings into
  ;; lists of strings.  But some commands (e.g., 'guix hash') accept a
  ;; file name as the 'rest' argument, and as file names may contain
  ;; spaces, splitting by spaces will break such names.  For example, the
  ;; following argument: "-- /tmp/file with spaces" will be transformed
  ;; into the following list: ("--" "/tmp/file" "with" "spaces") instead
  ;; of the wished ("--" "/tmp/file with spaces").
  (let* (rest
         (rx (rx string-start
                 (or "-- " "--install " "--remove ")))
         (args (mapcar (lambda (arg)
                         (if (string-match-p rx arg)
                             (progn (push (split-string arg) rest)
                                    nil)
                           arg))
                       args)))
    (if rest
        (apply #'append (delq nil args) rest)
      args)))


;;; 'Execute' actions

(defvar guix-command-default-execute-arguments
  (list
   (guix-command-make-argument
    :name "repl"  :char ?r :doc "Run in Guix REPL")
   (guix-command-make-argument
    :name "shell" :char ?s :doc "Run in shell")
   (guix-command-make-argument
    :name "copy"  :char ?c :doc "Copy command line"))
  "List of default 'execute' action arguments.")

(defvar guix-command-additional-execute-arguments
  `((("build")
     ,(guix-command-make-argument
       :name "log" :char ?l :doc "View build log"))
    (("graph")
     ,(guix-command-make-argument
       :name "view" :char ?v :doc "View graph")))
  "Alist of guix commands and additional 'execute' action arguments.")

(defun guix-command-execute-arguments (commands)
  "Return a list of 'execute' action arguments for COMMANDS."
  (mapcar (lambda (arg)
            (guix-command-modify-argument arg
              :action? t
              :fun (guix-command-action-name
                    commands (guix-command-argument-name arg))))
          (append guix-command-default-execute-arguments
                  (guix-assoc-value
                   guix-command-additional-execute-arguments commands))))

(defvar guix-command-special-executors
  '((("environment")
     ("repl" . guix-run-environment-command-in-repl))
    (("pull")
     ("repl" . guix-run-pull-command-in-repl))
    (("build")
     ("log" . guix-run-view-build-log))
    (("graph")
     ("view" . guix-run-view-graph)))
  "Alist of guix commands and alists of special executers for them.
See also `guix-command-default-executors'.")

(defvar guix-command-default-executors
  '(("repl"  . guix-run-command-in-repl)
    ("shell" . guix-run-command-in-shell)
    ("copy"  . guix-copy-command-as-kill))
  "Alist of default executers for action names.")

(defun guix-command-executor (commands name)
  "Return function to run command line arguments for guix COMMANDS."
  (or (guix-assoc-value guix-command-special-executors commands name)
      (guix-assoc-value guix-command-default-executors name)))

(defun guix-run-environment-command-in-repl (args)
  "Run 'guix ARGS ...' environment command in Guix REPL."
  ;; As 'guix environment' usually tries to run another process, it may
  ;; be fun but not wise to run this command in Geiser REPL.
  (when (or (member "--dry-run" args)
            (member "--search-paths" args)
            (when (y-or-n-p
                   (format "'%s' command will spawn an external process.
Do you really want to execute this command in Geiser REPL? "
                           (guix-command-string args)))
              (message "May \"M-x shell-mode\" be with you!")
              t))
    (guix-run-command-in-repl args)))

(defun guix-run-pull-command-in-repl (args)
  "Run 'guix ARGS ...' pull command in Guix REPL.
Perform pull-specific actions after operation, see
`guix-after-pull-hook' and `guix-update-after-pull'."
  (guix-eval-in-repl
   (apply #'guix-make-guile-expression 'guix-command args)
   nil 'pull))

(defun guix-run-view-build-log (args)
  "Add --log-file to ARGS, run 'guix ARGS ...' build command, and
open the log file(s)."
  (let* ((args (if (member "--log-file" args)
                   args
                 (apply #'list (car args) "--log-file" (cdr args))))
         (output (guix-command-output args))
         (files  (split-string output "\n" t)))
    (dolist (file files)
      (guix-find-file-or-url file)
      (guix-build-log-mode))))

(defun guix-run-view-graph (args)
  "Run 'guix ARGS ...' graph command, make the image and open it."
  (let* ((graph-file (guix-dot-file-name))
         (dot-args   (guix-dot-arguments graph-file)))
    (if (guix-eval-read (guix-make-guile-expression
                         'pipe-guix-output args dot-args))
        (guix-find-file graph-file)
      (error "Couldn't create a graph"))))


;;; Generating popups, actions, etc.

(defmacro guix-command-define-popup-action (name &optional commands)
  "Define NAME function to generate (if needed) and run popup for COMMANDS."
  (declare (indent 1) (debug t))
  (let* ((popup-fun (guix-command-symbol `(,@commands "popup")))
         (doc (format "Call `%s' (generate it if needed)."
                      popup-fun)))
    `(defun ,name (&optional arg)
       ,doc
       (interactive "P")
       (unless (fboundp ',popup-fun)
         (guix-command-generate-popup ',popup-fun ',commands))
       (,popup-fun arg))))

(defmacro guix-command-define-execute-action (name executor
                                                   &optional commands)
  "Define NAME function to execute the current action for guix COMMANDS.
EXECUTOR function is called with the current command line arguments."
  (declare (indent 1) (debug t))
  (let* ((arguments-fun (guix-command-symbol `(,@commands "arguments")))
         (doc (format "Call `%s' with the current popup arguments."
                      executor)))
    `(defun ,name (&rest args)
       ,doc
       (interactive (,arguments-fun))
       (,executor (append ',commands
                          (guix-command-post-process-args args))))))

(defun guix-command-generate-popup-actions (actions &optional commands)
  "Generate 'popup' commands from ACTIONS arguments for guix COMMANDS."
  (dolist (action actions)
    (let ((fun (guix-command-argument-fun action)))
      (unless (fboundp fun)
        (eval `(guix-command-define-popup-action ,fun
                 ,(append commands
                          (list (guix-command-argument-name action)))))))))

(defun guix-command-generate-execute-actions (actions &optional commands)
  "Generate 'execute' commands from ACTIONS arguments for guix COMMANDS."
  (dolist (action actions)
    (let ((fun (guix-command-argument-fun action)))
      (unless (fboundp fun)
        (eval `(guix-command-define-execute-action ,fun
                 ,(guix-command-executor
                   commands (guix-command-argument-name action))
                 ,commands))))))

(defun guix-command-generate-popup (name &optional commands)
  "Define NAME popup with 'guix COMMANDS ...' interface."
  (let* ((command  (car commands))
         (man-page (concat "guix" (and command (concat "-" command))))
         (doc      (format "Popup window for '%s' command."
                           (guix-concat-strings (cons "guix" commands)
                                                " ")))
         (args     (guix-command-arguments commands))
         (switches (guix-command-sort-arguments
                    (guix-command-switches args)))
         (options  (guix-command-sort-arguments
                    (guix-command-options args)))
         (popup-actions (guix-command-sort-arguments
                         (guix-command-actions args)))
         (execute-actions (unless popup-actions
                            (guix-command-execute-arguments commands)))
         (actions (or popup-actions execute-actions)))
    (if popup-actions
        (guix-command-generate-popup-actions popup-actions commands)
      (guix-command-generate-execute-actions execute-actions commands))
    (eval
     `(guix-define-popup ,name
        ,doc
        'guix-commands
        :man-page ,man-page
        :switches ',(mapcar #'guix-command-switch->popup-switch switches)
        :options  ',(mapcar #'guix-command-option->popup-option options)
        :actions  ',(mapcar #'guix-command-action->popup-action actions)
        :max-action-columns 4))))

;;;###autoload (autoload 'guix "guix-command" "Popup window for 'guix'." t)
(guix-command-define-popup-action guix)

(defalias 'guix-edit-action #'guix-edit)


(defvar guix-command-font-lock-keywords
  (eval-when-compile
    `((,(rx "("
            (group "guix-command-define-"
                   (or "popup-action"
                       "execute-action"
                       "argument-improver"))
            symbol-end
            (zero-or-more blank)
            (zero-or-one
             (group (one-or-more (or (syntax word) (syntax symbol))))))
       (1 font-lock-keyword-face)
       (2 font-lock-function-name-face nil t)))))

(font-lock-add-keywords 'emacs-lisp-mode guix-command-font-lock-keywords)

(provide 'guix-command)

;;; guix-command.el ends here