Re: [gentoo-user] Versioned world dependencies and subslot rebuilds

[Bryan Gardiner]

On Sat, 9 Aug 2014 16:23:30 +0300
Sergei Trofimovich <slyfox@g.o> wrote:

> On Fri, 8 Aug 2014 17:37:52 -0700
> Bryan Gardiner <bog@××××××.net> wrote:
>
> > Happy Friday gentoo-user,
> >
> > I'm setting up a chroot for doing some Haskell work.  This chroot is
> > so that I can test my package against old versions of my
> > dependencies.  I thought I would be okay with putting the following in
> > my world file:
> >
> >     =dev-haskell/cabal-1.16*
> >     ~dev-haskell/mtl-2.1.1
> >     ~dev-haskell/gtk-0.12.0
> >     ~dev-haskell/hunit-1.2.4.2
> >     ~dev-haskell/parsec-3.1.3
> >     =dev-lang/ghc-7.4.2
> >
> > But when I do "emerge -puvD --changed-use @world" I get:
> >
> > > # emerge -puvDN @world
> > >
> > > These are the packages that would be merged, in order:
> > >
> > > Calculating dependencies... done!
> > > [ebuild  rR    ] dev-lang/ghc-7.4.2:0/7.4.2::gentoo-haskell  USE="binary doc gmp -ghcbootstrap -ghcmakebinary -llvm" 0 kB
> > > [ebuild  rR    ] dev-haskell/cabal-1.16.0.3:0/1.16.0.3  USE="-profile {-test}" 0 kB
> > > [ebuild  rR    ] dev-haskell/ghc-paths-0.1.0.9::gentoo-haskell  USE="-profile" 0 kB
> > > [ebuild  rR    ] dev-haskell/xhtml-3000.2.1-r1:0/3000.2.1::gentoo-haskell  USE="hoogle hscolour -doc -profile" 0 kB
> > > [ebuild  rR    ] dev-haskell/glib-0.12.4-r1:0/0.12.4  USE="doc hscolour -profile" 0 kB
> > > [ebuild  rR    ] dev-haskell/utf8-string-0.3.7-r1:0/0.3.7  USE="doc hscolour -profile" 0 kB
> > > [ebuild  rR    ] dev-haskell/deepseq-1.3.0.1:0/1.3.0.1::gentoo-haskell  USE="doc hoogle hscolour -profile" 0 kB
> > > [ebuild  rR    ] dev-haskell/transformers-0.3.0.0-r1:0/0.3.0.0::gentoo-haskell  USE="doc hoogle hscolour -profile" 0 kB
> > > [ebuild  rR    ] dev-haskell/mtl-2.1.1  USE="doc hscolour -profile" 0 kB
> > > [ebuild  rR    ] dev-haskell/text-0.11.3.1:0/0.11.3.1  USE="doc hscolour -developer -profile {-test}" 0 kB
> > > [ebuild  rR    ] dev-haskell/cairo-0.12.5.0-r1:0/0.12.5.0  USE="doc hscolour pdf postscript svg -profile" 0 kB
> > > [ebuild  rR    ] dev-haskell/gio-0.12.4-r1:0/0.12.4  USE="doc hscolour -profile" 0 kB
> > > [ebuild  rR    ] dev-haskell/pango-0.12.4-r1:0/0.12.4  USE="doc hscolour -profile" 0 kB
> > > [ebuild  N     ] dev-haskell/gtk-0.12.4-r1:2/0.12.4  USE="doc gio hscolour -profile" 0 kB
> > >
> > > Total: 14 packages (1 new, 13 reinstalls), Size of downloads: 0 kB
> > >
> > >  * IMPORTANT: 5 news items need reading for repository 'gentoo'.
> > >  * Use eselect news to read news items.
> >
> > (I haven't gotten gtk to install just yet.)  I can't figure out what's
> > causing the rebuilds.  If I rebuild them, then they continue wanting
> > to rebuild.  If I instead put the unversioned atoms in world and stick
> > the following in package.mask, then the rebuilds disappear:
> >
> >     >=dev-haskell/cabal-1.17
> >     >=dev-haskell/mtl-2.1.2
> >     >=dev-haskell/gtk-0.12.1
> >     >=dev-haskell/hunit-1.2.4.3
> >     >=dev-haskell/parsec-3.1.4
> >     >=dev-lang/ghc-7.4.3
> >
> > I've attached the output of "emerge -puvD --changed-use --debug
> > @world" for the rebuilding case.  I see:
> >
> >   13993 Exiting... (dev-lang/ghc-7.4.2::gentoo-haskell, ebuild scheduled for merge)
> >
> >   18458 @__auto_slot_operator_replace_installed__ depends on
> >   ...
> >   18463   (dev-lang/ghc-7.4.2::gentoo-haskell, ebuild scheduled for merge) (buildtime_slot_op)
> >
> >   18697 forced reinstall atoms:
> >   18698    root: /
> >   ...
> >   18711       atom: dev-lang/ghc:0
> >
> > but don't understand why.  What's causing the rebuilds?
>
> Hia Bryan!
>
> It looks like very old portage bug:
> https://bugs.gentoo.org/show_bug.cgi?id=439688
>
> USE=doc might be a trigger of this bug (due to circular nature of doc haskell depends)
>
> What portage version you are using?
> Fresh portage is able to show which packages exactly trigger rebuild.

Interesting (and yes, old) bug.  I'm on portage-2.2.8-r1 but maybe
this is a related issue.  I tried disabling my "dev-haskell/* doc" USE
line, changed the world lines to exact versions, and moved them to a
set as Neil suggested, but I still get rebuilds, and Portage doesn't
say why.

(Fewer rebuilds now, independent of the USE=-doc change:)

> # emerge -puvD --changed-use @world
>
> These are the packages that would be merged, in order:
>
> Calculating dependencies... done!
> [ebuild  rR    ] dev-haskell/mtl-2.1.1  USE="hscolour -doc -profile" 0 kB
> [ebuild  rR    ] dev-haskell/gio-0.12.4-r1:0/0.12.4  USE="hscolour -doc -profile" 0 kB
> [ebuild  rR    ] dev-haskell/cairo-0.12.4-r1:0/0.12.4  USE="hscolour svg -doc -profile" 0 kB
> [ebuild  rR    ] dev-haskell/pango-0.12.4-r1:0/0.12.4  USE="hscolour -doc -profile" 0 kB
> [ebuild  rR    ] dev-haskell/gtk-0.12.4-r1:2/0.12.4  USE="gio hscolour -doc -profile" 0 kB
>
> Total: 5 packages (5 reinstalls), Size of downloads: 0 kB
>
>  * IMPORTANT: 5 news items need reading for repository 'gentoo'.
>  * Use eselect news to read news items.

Thanks!
Bryan

-- 
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