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bug#44525: Derivation of computed-file has no outputs
From: |
Marius Bakke |
Subject: |
bug#44525: Derivation of computed-file has no outputs |
Date: |
Sun, 08 Nov 2020 21:44:51 +0100 |
Stefan <stefan-guix@vodafonemail.de> writes:
> Hi!
>
> I try to use a computed-file as an input to a bootloader profile hook
> function. Using guix system I get this error message:
>
> guix system: error: reference to invalid output 'out' of derivation
> '/gnu/store/946szbrwn3ja74yjnibbhjisjflvsk73-test.txt.drv'
>
> This is the simple definition of the computed-file:
>
> (computed-file "test.txt" (with-imported-modules '((guix utils))
> #~(%current-system)))
That's expected: this derivation does not produce any outputs.
Assuming you intended to write (%current-system) to test.txt, you can do
something along these lines:
(computed-file "test.txt"
#~(call-with-output-file #$output
(lambda (port)
(format port #$(%current-system)))))
So I think this is not-a-bug. WDYT?
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