[PATCH 0/2] replacing ci/config/allow-ref with a repo variable

This is a more efficient way to do the same thing that ci/config/allow-ref does (which didn't exist back then).

We should be able to do the same with ci/config/skip-concurrent (and just use vars.CI_SKIP_CONCURRENT) throughout the workflow. But I didn't test that at all.

After that, the only useful thing left in the "config" job would be the "skip-if-redundant" step. I'm not sure if it will be possible to get the same behavior there without spinning up a VM.

  [1/2]: ci: allow branch selection through "vars"
  [2/2]: ci: deprecate ci/config/allow-ref script

 .github/workflows/main.yml | 10 +++++++---
 ci/config/README           | 14 ++++++++++++++
 ci/config/allow-ref.sample | 27 ---------------------------
 3 files changed, 21 insertions(+), 30 deletions(-)
 create mode 100644 ci/config/README
 delete mode 100755 ci/config/allow-ref.sample