blob: a4c780bcd8c5f56d88161bd239f2c8d72a2a8e40 (
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
|
(define-module (util options)
:use-module (util)
:use-module (srfi srfi-1)
)
;; option-assoc → getopt-valid option-assoc
(define-public (getopt-opt options)
(map (lambda (optline)
(cons (car optline)
(map (lambda (opt-field)
(cons (car opt-field)
(cond [(and (eq? 'value (car opt-field))
(symbol? (cadr opt-field)))
'(optional)]
[else (cdr opt-field)])))
(lset-intersection (lambda (a b) (eqv? b (car a)))
(cdr optline)
'(single-char required? value predicate)))))
options))
;; (name (key value) ...) → sxml
(define (fmt-help option-line)
(let ((name (car option-line))
(args (cdr option-line)))
(let ((valuefmt (case (and=> (assoc-ref args 'value) car)
[(#t) '(" " (i value))]
[(#f) '()]
[else => (lambda (s) `(" [" (i ,s) "]"))])))
`(*TOP* (b "--" ,name) ,@valuefmt
,@(awhen (assoc-ref args 'single-char)
`("," (ws)
(b "-" ,(car it))
,@valuefmt))
(br)
,@(awhen (assoc-ref args 'description)
`((blockquote ,@it)
(br)))))))
(use-modules (text markup))
(define-public (format-arg-help options)
(sxml->ansi-text (cons '*TOP* (map sxml->ansi-text (map fmt-help options)))))
(define*-public (print-arg-help options optional: (port (current-error-port)))
(display (format-arg-help options) port))
|