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nar: 'write-file' can write to non-file ports.

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* guix/nar.scm (write-contents): Use 'sendfile' only when P is a file
  port.
* tests/nar.scm ("write-file supports non-file output ports"): New test.
This commit is contained in:
Ludovic Courtès 2014-02-21 17:37:55 +01:00
parent 86d07a5514
commit a93e91ff48
2 changed files with 9 additions and 1 deletions
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3
guix/nar.scm
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@ -112,7 +112,8 @@
(write-long-long size p)
(call-with-binary-input-file file
;; Use `sendfile' when available (Guile 2.0.8+).
(if (compile-time-value (defined? 'sendfile))
(if (and (compile-time-value (defined? 'sendfile))
(file-port? p))
(cut sendfile p <> size 0)
(cut dump <> p size)))
(write-padding size p))

7
tests/nar.scm
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@ -183,6 +183,13 @@
(test-begin "nar")
(test-assert "write-file supports non-file output ports"
(let ((input (string-append (dirname (search-path %load-path "guix.scm"))
"/guix"))
(output (%make-void-port "w")))
(write-file input output)
#t))
(test-assert "write-file + restore-file"
(let* ((input (string-append (dirname (search-path %load-path "guix.scm"))
"/guix"))