/usr/share/racket/collects/pkg/commands.rkt is in racket-common 6.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | #lang racket/base
(require racket/cmdline
planet/private/command
raco/command-name
racket/function
(for-syntax racket/base
racket/list
racket/syntax
syntax/parse
syntax/stx))
(define ((string->option what valid-options) str)
(define s (string->symbol str))
(unless (memq s valid-options)
(raise-user-error (string->symbol
(format "~a ~a"
(short-program+command-name)
(current-svn-style-command)))
"invalid <~a>: ~a\n valid <~a>s are:~a"
what
str
what
(apply string-append
(for/list ([s (in-list valid-options)])
(format " ~a" s)))))
s)
(define ((string->num what) str)
(define n (string->number str))
(unless (exact-nonnegative-integer? n)
(raise-user-error (string->symbol
(format "~a ~a"
(short-program+command-name)
(current-svn-style-command)))
"invalid <~a> number: ~a"
what
str))
n)
(begin-for-syntax
(define symbol->keyword
(compose string->keyword symbol->string))
(define-syntax-class kind
#:attributes (default fun (arg-val 1))
[pattern #:bool
#:attr (arg-val 1) empty
#:attr default #'#f
#:attr fun #'(λ () #t)]
[pattern (#:sym name:id [opt:id ...] default:expr)
#:attr (arg-val 1) (list #'name)
#:attr fun #'(string->option 'name '(opt ...))]
[pattern (#:str name:id default:expr)
#:attr (arg-val 1) (list #'name)
#:attr fun #'identity]
[pattern (#:num name:id default:expr)
#:attr (arg-val 1) (list #'name)
#:attr fun #'(string->num 'name)])
(define-syntax-class option
#:attributes (command-line variable (param 1) (call 1))
[pattern (k:kind arg:id (alias:str ...) doc:expr body:expr ...)
#:do
[(define arg-kw (symbol->keyword (syntax->datum #'arg)))
(define arg-str (format "--~a" (syntax->datum #'arg)))
(define arg-var (generate-temporary #'arg))]
#:attr variable
(quasisyntax/loc #'arg
(define #,arg-var k.default))
#:attr (param 1)
(syntax-e
(quasisyntax/loc #'arg
[#,arg-kw [arg k.default]]))
#:attr (call 1)
(syntax-e
(quasisyntax/loc #'arg
[#,arg-kw #,arg-var]))
#:attr command-line
(quasisyntax/loc #'arg
[(alias ... #,arg-str)
k.arg-val ...
doc
(set! #,arg-var (k.fun k.arg-val ...))
body ...])])
(define-syntax-class group-kind
[pattern #:once-any]
[pattern #:once-each]
[pattern #:multi])
(define-splicing-syntax-class option-group
#:attributes ((command-line 1) variable (param 1) (call 1))
[pattern (~seq k:group-kind o:option ...)
#:attr (command-line 1)
(syntax->list #'(k o.command-line ...))
#:attr variable
#'(begin o.variable ...)
#:attr (param 1)
(syntax->list #'(o.param ... ...))
#:attr (call 1)
(syntax->list #'(o.call ... ...))])
(define-splicing-syntax-class usage-help
#:attributes ((command-line 1))
[pattern (~seq #:usage-help s:str ...)
#:attr (command-line 1)
(syntax->list #'(#:usage-help s ...))])
(define-splicing-syntax-class arguments
#:attributes (accum args (body 1) help-strs)
[pattern (~seq #:args args
body:expr ...)
#:with accum #'ignored
#:with help-strs (with-syntax ([strs
(map symbol->string
(map syntax->datum
(let loop ([args #'args])
(cond
[(stx-null? args) null]
[(stx-pair? args)
(cons (stx-car args)
(loop (stx-cdr args)))]
[else
(list args)]))))])
#`(list . strs))]
[pattern (~seq #:handlers
(lambda (accum . args) body:expr ...)
help-strs:expr)])
(define-syntax-class command
#:attributes (name function variables command-line (extra-defs 1))
#:literals (define)
[pattern (name:id doc:expr (~and extra-defs (define x e)) ...
uh:usage-help ... og:option-group ... arg:arguments)
#:do
[(define name-str (symbol->string (syntax->datum #'name)))]
#:attr function
(syntax/loc #'name
(define (name og.param ... ... . arg.args)
arg.body ...))
#:attr variables
(syntax/loc #'name
(begin og.variable ...))
#:attr command-line
(quasisyntax/loc #'name
[#,name-str
doc doc
uh.command-line ... ...
og.command-line ... ...
#:handlers
(lambda (accum . arg.args)
(args-app arg.args (name og.call ... ...)))
arg.help-strs])]))
(define-syntax (args-app stx)
(syntax-parse stx
[(_ () (call ...))
(syntax/loc stx
(call ...))]
[(_ rest:id (call ...))
(syntax/loc stx
(apply call ... rest))]
[(_ (fst . snd) (call ...))
(syntax/loc stx
(args-app snd (call ... fst)))]))
(define-syntax (commands stx)
(syntax-parse stx
[(_ main-doc:expr export-format:str c:command ...)
(with-syntax ([(export-names ...)
(map (λ (x)
#`[#,x
#,(string->symbol (format (syntax-e #'export-format)
(syntax-e x)))])
(syntax->list #'(c.name ...)))])
(syntax/loc stx
(begin
c.extra-defs ... ...
c.function ...
(provide (rename-out export-names ...))
(module+ main
c.variables ...
(svn-style-command-line
#:program (short-program+command-name)
#:argv (current-command-line-arguments)
main-doc
c.command-line ...)))))]))
(provide commands)
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