Re: [RFC 0/4] PoC for isar-apt repo reusing

[Henning Schild <henning.schild@siemens.com>]

Hi,

i did not look into the details yet. Just wanted to let you know that
we do have a prototype implementation of using sstate caching. That
allows caching anything, not just isar-apt.

The speedups on rebuilds are more than just significant. But it is
still too rough to present it on the list.

I think that sstate and setscene are better and more generic than
targeting only isar-apt.

If you want i guess Adriaan can share the current state of the "sstate"
patch series for anyone to play with. We are not holding back, just are
not ready to show ... But seeing that you work on similar things it is
about time we tell people about that ongoing sstate experiment.

Henning

Am Thu,  2 Sep 2021 11:58:13 +0200
schrieb Uladzimir Bely <ubely@ilbers.de>:

> Currently, isar-apt repo is always rebuilt at second build when
> temporary files except the repo directory were deleted.
> 
> This patchset implements proof-of-concept of reusing isar-apt 
> repo previously built. The idea is to check that package already 
> exists in the repo and early exit tasks related to fetching/building.
> 
> Such approach doesn't remove any tasks from the queue, but changes
> their behvaior (early exit) in case of existing package found.
> 
> Uladzimir Bely (4):
>   meta-isar: Fix do_dpkg_build override for prebuild-deb recipe.
>   isar-apt: PoC of reusing isar-apt repo
>   ci: Test for isar-apt reuse
>   doc: Add section for isar-apt reuse functionality
> 
>  doc/user_manual.md                            | 23 ++++++
>  meta-isar/conf/local.conf.sample              |  4 ++
>  .../prebuilt-deb/prebuilt-deb_0.1.bb          |  2 +-
>  meta/classes/dpkg-base.bbclass                |  1 +
>  meta/classes/isar-apt-cache.bbclass           | 72
> +++++++++++++++++++ scripts/ci_build.sh                           |
> 10 +++ 6 files changed, 111 insertions(+), 1 deletion(-)
>  create mode 100644 meta/classes/isar-apt-cache.bbclass
>