* Why is die "doc" output downloaded when building this package?
@ 2016-11-05 17:03 Hartmut Goebel
2016-11-05 21:53 ` Ludovic Courtès
0 siblings, 1 reply; 3+ messages in thread
From: Hartmut Goebel @ 2016-11-05 17:03 UTC (permalink / raw)
To: help-guix
Hi,
when building this package, qt-4.8.7-doc (the doc-output of qt-4.7.8)
will be downloaded. I do not understand why.
(package
(name "automoc4")
(version "0.9.88")
(source (origin
(method url-fetch)
(uri (string-append
"http://download.kde.org/stable/" name "/" version "/"
name "-" version ".tar.xz"))
(sha256
(base32
"0jackvg0bdjg797qlbbyf9syylm0qjs55mllhn11vqjsq3s1ch93"))))
(build-system cmake-build-system)
(arguments
`(#:tests? #f))
(inputs
`(("qt-4" ,qt-4)))
(home-page "http://kde.org/")
(synopsis "")
(description "")
(license
license:gpl3+))
--
Regards
Hartmut Goebel
| Hartmut Goebel | h.goebel@crazy-compilers.com |
| www.crazy-compilers.com | compilers which you thought are impossible |
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Why is die "doc" output downloaded when building this package?
2016-11-05 17:03 Why is die "doc" output downloaded when building this package? Hartmut Goebel
@ 2016-11-05 21:53 ` Ludovic Courtès
2016-11-06 15:25 ` Hartmut Goebel
0 siblings, 1 reply; 3+ messages in thread
From: Ludovic Courtès @ 2016-11-05 21:53 UTC (permalink / raw)
To: Hartmut Goebel; +Cc: bug-guix, help-guix
Hi,
(Adding a bug at bug-guix@gnu.org.)
Hartmut Goebel <h.goebel@crazy-compilers.com> skribis:
> when building this package, qt-4.8.7-doc (the doc-output of qt-4.7.8)
> will be downloaded. I do not understand why.
Most likely this is due to a limitation of the current implementation of
grafts: all the outputs of packages on a “grafting path” need to be
downloaded, even if some of these outputs are unused.
This is because ‘graft-derivation’ takes a derivation, such as Qt’s, and
returns a derivation with as many outputs, but marked as
non-substitutable (locally built). Because it’s locally built, all the
outputs of the original derivation must be fetched just to be able to
build the grafted derivation, even if only one of those outputs is
needed.
I think we could fix that by creating one graft derivation for each
output of the original derivation.
Thanks,
Ludo’.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Why is die "doc" output downloaded when building this package?
2016-11-05 21:53 ` Ludovic Courtès
@ 2016-11-06 15:25 ` Hartmut Goebel
0 siblings, 0 replies; 3+ messages in thread
From: Hartmut Goebel @ 2016-11-06 15:25 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: bug-guix, help-guix
Am 05.11.2016 um 22:53 schrieb Ludovic Courtès:
> Most likely this is due to a limitation of the current implementation of
> grafts: all the outputs of packages on a “grafting path” need to be
> downloaded, even if some of these outputs are unused.
IC. Thanks for the explanation.
--
Regards
Hartmut Goebel
| Hartmut Goebel | h.goebel@crazy-compilers.com |
| www.crazy-compilers.com | compilers which you thought are impossible |
^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-11-05 17:03 Why is die "doc" output downloaded when building this package? Hartmut Goebel
2016-11-05 21:53 ` Ludovic Courtès
2016-11-06 15:25 ` Hartmut Goebel
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