GNU logs - #33737, boring messages

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Subject: bug#33737: do not attempt to build a package known to be broken
Resent-From: Ricardo Wurmus <rekado@HIDDEN>
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From: Ricardo Wurmus <rekado@HIDDEN>
Date: Fri, 14 Dec 2018 05:41:37 +0100
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The default use case is for users to have substitutes enabled and to
fetch binaries from a build farm.  The build farm tries to build all
packages, but not all builds succeed.  The daemon caches build failures.

This information, however, is not available for users.  The default
behaviour of Guix is to attempt building the package locally.  This is
fine for packages that the build farm hasn=E2=80=99t attempted yet, but it =
is a
waste of time when the build has already been attempted without success.

I propose that =E2=80=9Cguix publish=E2=80=9D should also convey informatio=
n about
failed builds.  The Guix client can then abort right away without
wasting time and power to attempt a doomed build.  Users may override
this with =E2=80=9C--fallback=E2=80=9D or a new option.

--
Ricardo

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Ricardo Wurmus <rekado@HIDDEN>
Subject: bug#33737: Acknowledgement (do not attempt to build a package
 known to be broken)
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Date: Fri, 14 Dec 2018 04:43:03 +0000

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33737: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D33737
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Subject: bug#33737: do not attempt to build a package known to be broken
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Date: Sat, 15 Dec 2018 19:54:37 +0100
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On Fri, 14 Dec 2018 05:41:37 +0100
Ricardo Wurmus <rekado@HIDDEN> wrote:

> The default use case is for users to have substitutes enabled and to
> fetch binaries from a build farm.  The build farm tries to build all
> packages, but not all builds succeed.  The daemon caches build
> failures.
>=20
> This information, however, is not available for users.  The default
> behaviour of Guix is to attempt building the package locally.  This is
> fine for packages that the build farm hasn=E2=80=99t attempted yet, but i=
t is
> a waste of time when the build has already been attempted without
> success.

+1

Very good idea.

Bj=C3=B6rn

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Subject: bug#33737: do not attempt to build a package known to be broken
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------=_Part_21926_193029968.1544902761717
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Package can have additional fields in guix repository, like
architecture, version, buid_status, source_type
build_status may contain such info.=20
source_type could show if the package source url is one of those public git=
 services (thus, user could enable proxy first).


Dec 15, 2018, 6:54 PM by bjoern.hoefling@HIDDEN:

> On Fri, 14 Dec 2018 05:41:37 +0100
> Ricardo Wurmus <> rekado@HIDDEN <mailto:rekado@HIDDEN>> > wrote=
:
>
>> The default use case is for users to have substitutes enabled and to
>> fetch binaries from a build farm.  The build farm tries to build all
>> packages, but not all builds succeed.  The daemon caches build
>> failures.
>>
>> This information, however, is not available for users.  The default
>> behaviour of Guix is to attempt building the package locally.  This is
>> fine for packages that the build farm hasn=E2=80=99t attempted yet, but =
it is
>> a waste of time when the build has already been attempted without
>> success.
>>
>
> +1
>
> Very good idea.
>
> Bj=C3=B6rn
>


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<html>
  <head>
    <meta http-equiv=3D"content-type" content=3D"text/html; charset=3DUTF-8=
">
  </head>
  <body>
<div style=3D"16px" text-align=3D"left">Package can have additional fields =
in guix repository, like<br /></div><div style=3D"16px" text-align=3D"left"=
>architecture, version, buid_status, source_type<br /></div><div style=3D"1=
6px" text-align=3D"left">build_status may contain such info. <br /></div><d=
iv style=3D"16px" text-align=3D"left">source_type could show if the package=
 source url is one of those public git services (thus, user could enable pr=
oxy first).<br /></div><div style=3D"16px" text-align=3D"left"><br /></div>=
<div style=3D"16px" text-align=3D"left"><br /></div><div style=3D"16px" tex=
t-align=3D"left">Dec 15, 2018, 6:54 PM by bjoern.hoefling@HIDDEN=
:<br /></div><blockquote class=3D"tutanota_quote" style=3D"border-left: 1px=
 solid #93A3B8; padding-left: 10px; margin-left: 5px;"><div style=3D"16px" =
text-align=3D"left">On Fri, 14 Dec 2018 05:41:37 +0100<br /></div><div styl=
e=3D"16px" text-align=3D"left">Ricardo Wurmus &lt;<a rel=3D"noopener norefe=
rrer" target=3D"_blank" href=3D"mailto:rekado@HIDDEN">rekado@HIDDEN=
et</a>&gt; wrote:<br /></div><blockquote><div style=3D"16px" text-align=3D"=
left">The default use case is for users to have substitutes enabled and to<=
br /></div><div style=3D"16px" text-align=3D"left">fetch binaries from a bu=
ild farm.  The build farm tries to build all<br /></div><div style=3D"16px"=
 text-align=3D"left">packages, but not all builds succeed.  The daemon cach=
es build<br /></div><div style=3D"16px" text-align=3D"left">failures.<br />=
</div><div style=3D"16px" text-align=3D"left"><br /></div><div style=3D"16p=
x" text-align=3D"left">This information, however, is not available for user=
s.  The default<br /></div><div style=3D"16px" text-align=3D"left">behaviou=
r of Guix is to attempt building the package locally.  This is<br /></div><=
div style=3D"16px" text-align=3D"left">fine for packages that the build far=
m hasn=E2=80=99t attempted yet, but it is<br /></div><div style=3D"16px" te=
xt-align=3D"left">a waste of time when the build has already been attempted=
 without<br /></div><div style=3D"16px" text-align=3D"left">success.<br /><=
/div></blockquote><div style=3D"16px" text-align=3D"left"><br /></div><div =
style=3D"16px" text-align=3D"left">+1<br /></div><div style=3D"16px" text-a=
lign=3D"left"><br /></div><div style=3D"16px" text-align=3D"left">Very good=
 idea.<br /></div><div style=3D"16px" text-align=3D"left"><br /></div><div =
style=3D"16px" text-align=3D"left">Bj&ouml;rn<br /></div></blockquote><div =
style=3D"16px" text-align=3D"left"><br /></div>  </body>
</html>

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On Fri, 14 Dec 2018 05:41:37 +0100
Ricardo Wurmus <rekado@HIDDEN> wrote:

> The default use case is for users to have substitutes enabled and to
> fetch binaries from a build farm.  The build farm tries to build all
> packages, but not all builds succeed.  The daemon caches build failures.
>=20
> This information, however, is not available for users.  The default
> behaviour of Guix is to attempt building the package locally.  This is
> fine for packages that the build farm hasn=E2=80=99t attempted yet, but i=
t is a
> waste of time when the build has already been attempted without success.
>=20
> I propose that =E2=80=9Cguix publish=E2=80=9D should also convey informat=
ion about
> failed builds.  The Guix client can then abort right away without
> wasting time and power to attempt a doomed build.  Users may override
> this with =E2=80=9C--fallback=E2=80=9D or a new option.

As long as we distinguish transient build machine errors (disk full, can't
resolve hostname, too many names in directory, no inodes left etc) from act=
ual
errors in the source code, +1.

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Danny Milosavljevic <dannym@HIDDEN> writes:

>> I propose that =E2=80=9Cguix publish=E2=80=9D should also convey informa=
tion about
>> failed builds.  The Guix client can then abort right away without
>> wasting time and power to attempt a doomed build.  Users may override
>> this with =E2=80=9C--fallback=E2=80=9D or a new option.
>
> As long as we distinguish transient build machine errors (disk full, can't
> resolve hostname, too many names in directory, no inodes left etc) from a=
ctual
> errors in the source code, +1.

I was thinking of something very simple.  The daemon is already capable
of caching build failures; I think it may be good to simply pass that
information on to clients.

I don=E2=80=99t know how we could distinguish different kinds of build fail=
ures
with the current daemon.

--
Ricardo

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Hello!

Ricardo Wurmus <rekado@HIDDEN> skribis:

> Danny Milosavljevic <dannym@HIDDEN> writes:
>
>>> I propose that =E2=80=9Cguix publish=E2=80=9D should also convey inform=
ation about
>>> failed builds.  The Guix client can then abort right away without
>>> wasting time and power to attempt a doomed build.  Users may override
>>> this with =E2=80=9C--fallback=E2=80=9D or a new option.

Good idea!

The difficulty is that the protocol between =E2=80=98guix substitute --quer=
y=E2=80=99
and the daemon is currently very much Boolean: either =E2=80=98guix substit=
ute=E2=80=99
provides the binary or it doesn=E2=80=99t.  We=E2=80=99d have to adjust it.

>> As long as we distinguish transient build machine errors (disk full, can=
't
>> resolve hostname, too many names in directory, no inodes left etc) from =
actual
>> errors in the source code, +1.
>
> I was thinking of something very simple.  The daemon is already capable
> of caching build failures; I think it may be good to simply pass that
> information on to clients.

The daemon tries to cache only =E2=80=9Cpersistent=E2=80=9D failures.  In p=
articular,
local failures likely due to lack of space are not cached.

However, the daemon currently doesn=E2=80=99t distinguish between ENOSPC and
actual failures for offloaded builds.  We may be able to fix this by
having =E2=80=98guix offload=E2=80=99 check the available disk space upon f=
ailure.

Then there=E2=80=99s the problem of non-deterministic failures.  For these =
it
would be nicer to let the user build stuff anyway.  There=E2=80=99s no good
solution here.

Ludo=E2=80=99.

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