32 lines
1.0 KiB
Racket
32 lines
1.0 KiB
Racket
#lang racket/base
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(provide ->relative ->absolute)
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(require racket/list)
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(module+ test (require rackunit))
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;; PathString -> Path
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(define (->relative path)
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(if (relative-path? path)
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(build-path path)
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(let-values ([(_ lst)
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(split-at (explode-path path)
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(length (explode-path (current-directory))))])
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(apply build-path lst))))
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(module+ test
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(parameterize ([current-directory (build-path "/test")])
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(check-equal? (->relative "a")
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(build-path "a"))
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(check-equal? (->relative "/test/a/b")
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(build-path "a" "b"))))
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(define (->absolute path)
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(if (absolute-path? path)
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(if (string? path) path (path->string path))
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(path->string (simplify-path (build-path (current-directory) path)))))
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(module+ test
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(parameterize ([current-directory (build-path "/")])
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(check-equal? (->absolute "a") "/a")
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(check-equal? (->absolute "/a") "/a")
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(check-equal? (->absolute (build-path "a")) "/a")
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(check-equal? (->absolute (build-path "/a")) "/a")))
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