Code Generators for KCP-aware clients, informers and listers

This repository contains code generation tools analogous to the Kubernetes code-generator. It contains:

• cluster-client-gen to generate a cluster-aware clientset,
• cluster-informer-gen to generate cluster-aware informers and
• cluster-lister-gen to do the same for listers.

Note that you need to have generated the versioned Kubernetes clientset and applyconfiguration packages already in order to generate and use cluster-aware code. Single-cluster listers and informers however are optional and the generator here can generate the necessary interfaces itself.

Usage

It is strongly recommended to use the provided cluster_codegen.sh, which works very much like Kubernetes' kube_codegen.sh. A common way to acquire it is to have a synthetic Go dependency on github.com/kcp-dev/code-generator/v3/cmd/cluster-client-gen (often done in a hack/tools.go) and then call it like so in your project:

# Often you would want to generate both the regular Kubernetes clientset and
# the cluster-aware clienset.

CODEGEN_PKG="$(go list -f '{{.Dir}}' -m k8s.io/code-generator)"
CLUSTER_CODEGEN_PKG="$(go list -f '{{.Dir}}' -m github.com/kcp-dev/code-generator/v3)"

source "$CODEGEN_PKG/kube_codegen.sh"
source "$CLUSTER_CODEGEN_PKG/cluster_codegen.sh"

# Now you can call kube::codegen:: and cluster::codegen:: functions.

kube::codegen::gen_client \
  --boilerplate hack/boilerplate/examples/boilerplate.generatego.txt \
  --output-dir pkg/generated \
  --output-pkg acme.corp/pkg/generated \
  --with-applyconfig \
  --applyconfig-name applyconfigurations \
  --with-watch \
  ./pkg/apis

cluster::codegen::gen_client \
  --boilerplate hack/boilerplate/examples/boilerplate.generatego.txt \
  --output-dir pkg/clients \
  --output-pkg acme.corp/pkg/clients \
  --with-watch \
  --single-cluster-versioned-clientset-pkg acme.corp/pkg/generated/clientset/versioned \
  --single-cluster-applyconfigurations-pkg acme.corp/pkg/generated/applyconfigurations \
  --single-cluster-listers-pkg acme.corp/pkg/generated/listers \
  --single-cluster-informers-pkg acme.corp/pkg/generated/informers/externalversions \
  pkg/apis

Please refer to the cluster_codegen.sh for more information on the available command line flags.

Contributing

We ❤️ our contributors! If you're interested in helping us out, please check out contributing to kcp.

This community has a Code of Conduct. Please make sure to follow it.

Getting in touch

There are several ways to communicate with us:

• The #kcp-dev channel in the Kubernetes Slack workspace.
• Our mailing lists:
  • kcp-dev for development discussions.
  • kcp-users for discussions among users and potential users.
• By joining the kcp-dev mailing list, you should receive an invite to our bi-weekly community meetings.
• See recordings of past community meetings on YouTube.
• The next community meeting dates are available via our CNCF community group.
• Check the community meeting notes document for future and past meeting agendas.
• Browse the shared Google Drive to share design docs, notes, etc.
  • Members of the kcp-dev mailing list can view this drive.