Two reusable composite actions wrap the CI side of the release pipeline:
- release-binaries: setup-go, install mage + upx, cache xgo, invoke
`mage release:build <project>` from build/, GPG-sign the zip bundles,
upload to S3, store binaries and zips as workflow artifacts.
- release-os-package: download a binaries artifact, install mage,
`mage release:prepare-nfpm-config <project> <arch>`, stage the binary,
nfpm pack (with rpm signing inline and archlinux signing after), upload
to S3, store the package as an artifact.
Both actions are parameterized on project name, output paths, artifact
names, S3 target, and GPG/S3 secrets — adding a third Go binary to the
monorepo just means defining its project in build/magefile.go and adding
a four-line call site in release.yml.
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