Re: [PATCH v2 0/4] Fix ccache issues

[Uladzimir Bely <ubely@ilbers.de>]

In mail from Wednesday, 29 March 2023 15:43:10 +03 user Moessbauer, Felix 
wrote:
> On Tue, 2023-03-28 at 18:56 +0300, Uladzimir Bely wrote:
> 
> > In mail from Tuesday, 28 March 2023 18:51:58 +03 user Moessbauer,
> > Felix wrote:
> > 
> > > On Mon, 2023-03-27 at 08:27 +0300, Uladzimir Bely wrote:
> > > 
> > > 
> > > > In mail from Monday, 13 February 2023 10:56:07 +03 user Anton
> > > > Mikanovich 
> > > > wrote:
> > > > 
> > > > 
> > > > > This patchset just fixes some ccache-related issues which
> > > > > prevented
> > > > > us
> > > > > from enabling ccache globally.
> > > 
> > > 
> > > 
> > > Hi,
> > > 
> > > since this commit, I again see ccache issues when mixing cross and
> > > non-
> > > cross compilation for arm64 targets:
> > > 
> > > ccache: error: Failed to create directory /ccache/a/7: Not a
> > > directory
> > > 
> > > The error happened in the non-cross recipe.
> > > 
> > > I'm not 100% sure if this is related, but with ISAR f95f69d3 I did
> > > not
> > > observe these on the same layer.
> > > 
> > > Felix
> > > 
> > 
> > 
> > Probably, it's related to patch2.
> > 
> > You might have /ccache/a/ created earlier by 'root', and not it can't
> > create a 
> > subdir as sbuild user.
> 
> 
> Hi, this could very well be the case. However, when running in a CI on
> a project with multiple branches (e.g. during feature integration),
> this situation cannot be avoided. The cache is shared across all builds
> of a single project, but these builds might use different ISAR
> versions.
> 

Yes, it sounds a bit challenging. 

Returning back to root-owned ccache would not be a good solution. But if there 
are no other ways to deal with it, we might have to do it.

Alternatively, kas-based downstreams using old isar could apply patch2 as isar 
patch, until updated.

> This technically means, we need to update all branches of the project
> in a lockstep to be able to re-enable the ccache.
> 
> It would be good if we could find a way to avoid this situation.
> 
> Felix
> 
> 
> 
> > 
> > 
> 
>