Re: [libvirt PATCH 2/2] gitlab: Enable improved ccache usage

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On Mon, Mar 30, 2020 at 07:31:03PM +0200, Andrea Bolognani wrote:
> Setting CC="ccache cc" works in most cases, but sometimes it will
> break the build: in particular, we have experienced issues in the
> past with that approach when using cgo to build our Go bindings.
> 
> A more robust approach is to have a directory containing symlinks
> from the compiler name to the ccache binary: in that case, ccache
> itself will invoke the compiler, and the build system will be none
> the wiser.
> 
> Since libvirt-jenkins-ci commit 2563aebb6c5c, container images
> contain a suitable symlink directory, so all that's needed to
> enable the new approach is to add this directory to $PATH.
> 
> Since we're touching this anyway, we make a few more changes:
> $CCACHE_DIR is no longer created manually, because ccache will
> take care of creating it for us if it doesn't already exist; the

I could have sworn I had a build failure when I didn't have the
mkdir present when originally doing this recipe. It might have
been from gitlab itself, rather than ccache, eg when unpacking
the cache archive to the non-existant dir.  But assuming the
CI pipeline works for you...

> ccache setup is moved out of the job template and into
> script_variables, removing unnecessary duplication; a limit is
> set on the size of the cache (500 MB, which is twice the amount
> used by a fresh build on my Fedora 31 machine).
> 
> Signed-off-by: Andrea Bolognani <abologna@xxxxxxxxxx>
> ---
>  .gitlab-ci.yml | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)

Reviewed-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>


Regards,
Daniel
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