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
|
;;; guix-read.el --- Minibuffer readers
;; 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 functions to prompt a user for packages, system
;; types, hash formats and other guix related stuff.
;;; Code:
(require 'guix-help-vars)
(require 'guix-utils)
(require 'guix-base)
(defun guix-read-file-name (prompt &optional dir default-filename
mustmatch initial predicate)
"Read file name.
This function is similar to `read-file-name' except it also
expands the file name."
(expand-file-name (read-file-name prompt dir default-filename
mustmatch initial predicate)))
(defmacro guix-define-reader (name read-fun completions prompt)
"Define NAME function to read from minibuffer.
READ-FUN may be `completing-read', `completing-read-multiple' or
another function with the same arguments."
`(defun ,name (&optional prompt initial-contents)
(,read-fun ,(if prompt
`(or prompt ,prompt)
'prompt)
,completions nil nil initial-contents)))
(defmacro guix-define-readers (&rest args)
"Define reader functions.
ARGS should have a form [KEYWORD VALUE] ... The following
keywords are available:
- `completions-var' - variable used to get completions.
- `completions-getter' - function used to get completions.
- `single-reader', `single-prompt' - name of a function to read
a single value, and a prompt for it.
- `multiple-reader', `multiple-prompt' - name of a function to
read multiple values, and a prompt for it.
- `multiple-separator' - if specified, another
`<multiple-reader-name>-string' function returning a string
of multiple values separated the specified separator will be
defined."
(let (completions-var
completions-getter
single-reader
single-prompt
multiple-reader
multiple-prompt
multiple-separator)
;; Process the keyword args.
(while (keywordp (car args))
(pcase (pop args)
(`:completions-var (setq completions-var (pop args)))
(`:completions-getter (setq completions-getter (pop args)))
(`:single-reader (setq single-reader (pop args)))
(`:single-prompt (setq single-prompt (pop args)))
(`:multiple-reader (setq multiple-reader (pop args)))
(`:multiple-prompt (setq multiple-prompt (pop args)))
(`:multiple-separator (setq multiple-separator (pop args)))
(_ (pop args))))
(let ((completions
(cond ((and completions-var completions-getter)
`(or ,completions-var
(setq ,completions-var
(funcall ',completions-getter))))
(completions-var
completions-var)
(completions-getter
`(funcall ',completions-getter)))))
`(progn
,(when (and completions-var
(not (boundp completions-var)))
`(defvar ,completions-var nil))
,(when single-reader
`(guix-define-reader ,single-reader completing-read
,completions ,single-prompt))
,(when multiple-reader
`(guix-define-reader ,multiple-reader completing-read-multiple
,completions ,multiple-prompt))
,(when (and multiple-reader multiple-separator)
(let ((name (intern (concat (symbol-name multiple-reader)
"-string"))))
`(defun ,name (&optional prompt initial-contents)
(guix-concat-strings
(,multiple-reader prompt initial-contents)
,multiple-separator))))))))
(guix-define-readers
:completions-var guix-help-system-types
:single-reader guix-read-system-type
:single-prompt "System type: ")
(guix-define-readers
:completions-var guix-help-source-types
:single-reader guix-read-source-type
:single-prompt "Source type: ")
(guix-define-readers
:completions-var guix-help-hash-formats
:single-reader guix-read-hash-format
:single-prompt "Hash format: ")
(guix-define-readers
:completions-var guix-help-refresh-subsets
:single-reader guix-read-refresh-subset
:single-prompt "Refresh subset: ")
(guix-define-readers
:completions-var guix-help-key-policies
:single-reader guix-read-key-policy
:single-prompt "Key policy: ")
(guix-define-readers
:completions-var guix-help-elpa-archives
:single-reader guix-read-elpa-archive
:single-prompt "ELPA archive: ")
(guix-define-readers
:completions-var guix-help-verify-options
:multiple-reader guix-read-verify-options
:multiple-prompt "Verify option,s: "
:multiple-separator ",")
(guix-define-readers
:completions-getter guix-graph-type-names
:single-reader guix-read-graph-type
:single-prompt "Graph node type: ")
(guix-define-readers
:completions-getter guix-lint-checker-names
:multiple-reader guix-read-lint-checker-names
:multiple-prompt "Linter,s: "
:multiple-separator ",")
(guix-define-readers
:completions-getter guix-package-names
:single-reader guix-read-package-name
:single-prompt "Package: "
:multiple-reader guix-read-package-names
:multiple-prompt "Package,s: "
:multiple-separator " ")
(provide 'guix-read)
;;; guix-read.el ends here
|
