You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
1.8 KiB
Racket
60 lines
1.8 KiB
Racket
#lang racket/base
|
|
(require sugar/define/contract sugar/coerce/contract sugar/string racket/path)
|
|
|
|
|
|
|
|
(define+provide/contract (get-enclosing-dir p)
|
|
(coerce/path? . -> . path?)
|
|
(simplify-path (build-path p 'up)))
|
|
|
|
;; does path have a certain extension
|
|
(define+provide/contract (has-ext? x ext)
|
|
(coerce/path? coerce/symbol? . -> . coerce/boolean?)
|
|
(define ext-of-path (filename-extension x))
|
|
(and ext-of-path (equal? (string-downcase (bytes->string/utf-8 ext-of-path)) (string-downcase (symbol->string ext)))))
|
|
|
|
;; get file extension as a string, or return #f
|
|
;; (consistent with filename-extension behavior)
|
|
(define+provide/contract (get-ext x)
|
|
(coerce/path? . -> . (or/c #f string?))
|
|
(let ([fe-result (filename-extension x)])
|
|
(and fe-result (bytes->string/utf-8 fe-result))))
|
|
|
|
|
|
;; todo: add extensions
|
|
(define binary-extensions
|
|
'(gif jpg jpeg mp3 png zip pdf ico tar ai eps exe))
|
|
|
|
(define+provide/contract (has-binary-ext? x)
|
|
(coerce/path? . -> . coerce/boolean?)
|
|
(ormap (λ(ext) (has-ext? x ext)) binary-extensions))
|
|
|
|
|
|
|
|
;; put extension on path
|
|
;; use local contract here because this function is used within module
|
|
(define/contract+provide (add-ext x ext)
|
|
(coerce/string? coerce/string? . -> . coerce/path?)
|
|
(string-append x "." ext))
|
|
|
|
;; take one extension off path
|
|
(define+provide/contract (remove-ext x)
|
|
(coerce/path? . -> . path?)
|
|
;; pass through hidden files (those starting with a dot)
|
|
(if (x . starts-with? . ".")
|
|
x
|
|
(path-replace-suffix x "")))
|
|
|
|
|
|
;; take all extensions off path
|
|
(define+provide/contract (remove-all-ext x)
|
|
(coerce/path? . -> . path?)
|
|
;; pass through hidden files (those starting with a dot)
|
|
(if (x . starts-with? . ".")
|
|
x
|
|
(let ([path-with-removed-ext (remove-ext x)])
|
|
(if (equal? x path-with-removed-ext)
|
|
x
|
|
(remove-all-ext path-with-removed-ext)))))
|
|
|