[Chapel Merge] Simplify CI image build job, use caching

chapelhpcBot · August 19, 2026, 8:51pm

Branch: refs/heads/main
Revision: 478991f96592f4ea46478ac71ad5785165cc1664
Author: arifthpe
Link: Simplify CI image build job, use caching by arifthpe · Pull Request #29291 · chapel-lang/chapel · GitHub
Log Message:
Simplify CI image build job, use caching (#29291)

Slightly simplify the CI image build job's configuration, and enable
caching on it.

Previously build and push were done as separate steps, each using
GitHub - docker/build-push-action: GitHub Action to build and push Docker images with Buildx · GitHub. The build step would always
just build, and the push step would run conditionally (if on main)
with the same arguments as well as push: true. Combine them to a
single use of the action, with the value of push set to the previous
push step's condition.
Enable use of the Docker GitHub Actions cache
exporter
to slightly speed up builds.
This required enabling the containerd image store, following
instructions at
Multi-platform image with GitHub Actions | Docker Docs.

[trivial, not reviewed]