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Add CI info and dependency to packages doc

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Signed-off-by: Avi Deitcher <avi@deitcher.net>
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Avi Deitcher 2018-03-08 08:33:18 +02:00
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1 changed files with 12 additions and 1 deletions
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docs/packages.md
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@ -13,6 +13,18 @@ All LinuxKit packages are:
- Derived from well-known (and signed) sources for repeatable builds.
- Built with multi-stage builds to minimise their size.
## CI and Package Builds
When building and merging packages, it is important to note that our CI process builds packages. The targets `make ci` and `make ci-pr` execute `make -C pkg build`. These in turn execute `linuxkit pkg build` for each package under `pkg/`. This in turn will try to pull the image whose tag matches the tree hash or, failing that, to build it.
We do not want the builds to happen with each CI run for two reasons:
1. It is slower to do a package build than to just pull the latest image.
2. If any of the steps of the build fails, e.g. a `curl` download that depends on an intermittent target, it can cause all of CI to fail.
Thus, if, as a maintainer, you merge any commits into a `pkg/`, even if the change is documentation alone, please do a `linuxkit package push`.
## Package source
A package source consists of a directory containing at least two files:
@ -138,4 +150,3 @@ linuxkit pkg build -org=wombat -disable-content-trust -hash=foo push
and this will create `wombat/<image>:foo-<arch>` and
`wombat/<image>:foo` for use in your YAML files.