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utils: Add 'call-with-decompressed-port' and 'call-with-compressed-output-port'.

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* guix/utils.scm (call-with-decompressed-port,
  call-with-compressed-output-port): New procedures.
* tests/utils.scm ("compressed-output-port + decompressed-port"):
  Rewrite to use them.
This commit is contained in:
Ludovic Courtès 2014-03-24 22:15:29 +01:00
parent 80dea563a3
commit 01ac19dca4
3 changed files with 48 additions and 18 deletions
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27
tests/utils.scm
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@ -162,23 +162,16 @@
(equal? (get-bytevector-all decompressed) data)))))
(false-if-exception (delete-file temp-file))
(test-equal "compressed-output-port + decompressed-port"
'((0) "Hello, compressed port!")
(let ((text "Hello, compressed port!")
(output (open-file temp-file "w0b")))
(let-values (((compressed pids)
(compressed-output-port 'xz output)))
(display text compressed)
(close-port compressed)
(close-port output)
(and (every (compose zero? cdr waitpid) pids)
(let*-values (((input)
(open-file temp-file "r0b"))
((decompressed pids)
(decompressed-port 'xz input)))
(let ((str (get-string-all decompressed)))
(list (map (compose cdr waitpid) pids)
str)))))))
(test-assert "compressed-output-port + decompressed-port"
(let* ((file (search-path %load-path "guix/derivations.scm"))
(data (call-with-input-file file get-bytevector-all)))
(call-with-compressed-output-port 'xz (open-file temp-file "w0b")
(lambda (compressed)
(put-bytevector compressed data)))
(bytevector=? data
(call-with-decompressed-port 'xz (open-file temp-file "r0b")
get-bytevector-all))))
(false-if-exception (delete-file temp-file))
(test-equal "fcntl-flock wait"