[OE-core] [PATCH] sstate: add manifest info for shared file matches

[Richard Purdie]

On Fri, 2012-10-19 at 12:55 +0200, Martin Jansa wrote:
> On Thu, Oct 18, 2012 at 12:25:05PM -0700, Saul Wold wrote:
> > Present the manifest file that contains the matches for
> > files being installed to a location that already contains
> > that file. This will help to determine which is the correct
> > recipe to fix when this occurs.
> > 
> > [YOCTO #3191]
> 
> Can we do the same when removing files from sysroot?
> 
> To catch errors like this:
> http://git.openembedded.org/openembedded-core/commit/?id=6b12d4cd39bacb087654b59e25f5052a4e839b26
> 
> 12:40:15 < JaMa> it depends on order of tasks
> 12:41:27 < JaMa> gettext-native depends on gettext-minimal-native, so gettext-minimal-native installs own config.rpath to sysroot (when gettext-native "owns"
>                  it too)
> 12:41:55 < JaMa> then gettext-native is built and before populting sysroot it removes own files there (including config.rpath)
> 12:43:45 < JaMa> and because sstate assumes that every file in sysroot is provided by exactly one recipe, gettext-minimal-native looses his config.rpath
> 12:44:49 < JaMa> now there is at least warning when 2 recipes are installing the same file to sysroot, but that doesn't resolve this issues when some file is
>                  "moved" between recipes
> 12:47:30 < JaMa> because gettext-minimal-native is only recipe installing it
> 12:47:39 < JaMa> and gettext-native is only removing it
> 
> If we check manifests from other recipes before removing files we can show warning that
> gettext-native is trying to remove config.rpath now provided by gettext-minimal-native
> and keep config.rpath in sysroot.

The plan is to make it a hard error if something installs a file that
already exists. This issue will be resolved when that happens and I want
to get there sooner than later.

Running the check at sysroot clean time is therefore going to complicate
the code a lot and damage performance with no real end need...

> Now everybody doing incremental builds needs to call
> bitbake -c cleansstate gettext-minimal-native

-c clean should be sufficient. I wish people would use appropriately
sized hammers and this is why I never wanted cleansstate in the first
place :(.

Cheers,

Richard