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+<!--
+Copyright The Shipwright Contributors
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
+---
+title: shipwright-build-strategy-controller
+authors:
+  - "@jkhelil"
+reviewers:
+  - "@adambkaplan"
+  - "@qu1queee"
+approvers:
+  - "@adambkaplan"
+  - "@qu1queee"
+creation-date: 2023-10-02
+last-updated: 2023-10-02
+status: implementable
+---
+
+## Release Signoff Checklist
+
+- [x] Enhancement is `implementable`
+- [x] Design details are appropriately documented from clear requirements
+- [x] Test plan is defined
+- [ ] Graduation criteria for dev preview, tech preview, GA
+- [ ] User-facing documentation is created in [docs](/docs/)
+
+## Open Questions [optional]
+
+
+## Summary
+
+This ship proposes support of installing a catalog of Build Strategies
+via the shipwright operator in order to improve the user experience around Shipwright Build
+
+## Motivation
+
+Actually with the Shipwright operator, the user installs the Shipwright Build Controller. 
+Installation and upgrade of Build Strategies and Cluster Strategies is currently a manual process
+In order to improve user experience around Shipwright, the operator should also install the build strategies
+
+### Goals
+
+- Create a Build Strategy catalog repository in the upstream shipwright-io organization
+- Copy/publish the Build strategies from the upstream build repository to the new create catalog repository
+- Allow a user to install the default Build Strategy Catalog or if applicable the user provided catalog, via the Shipwright Operator
+ 
+### Non-Goals
+
+- Add a new operator to install the Build Strategy catalog
+- Curate or rework the Build Strategies in the upstream build repository when copied to the new catalog repository
+
+## Proposal
+
+We propose to introduce a new CRD in the Shipwright Operator : `ShipwrightBuildStrategy` API.
+
+```yaml
+apiVersion: operator.shipwright.io/v1alpha1
+kind: ShipwrightBuildStrategy
+metadata:
+  name: buildStrategy
+spec:
+  targetNamespace: shipwright-build
+  catalog:
+    url: https://github.com/shipwright-io/buildstrategy-catalog
+```
+We propose to add a new controller to the Shipwright Operator that reconciles the ShipwrightBuildStrategy.
+
+
+### User Stories [optional]
+
+#### Story 1
+
+As a Kubernetes cluster administrator
+I want to be able to install the default catalog of Shipwright Builds Strategies via the Shipwright Operator
+So that I can provide Shipwright Build Strategies to my developers
+
+
+#### Story 2
+
+As a Kubernetes cluster administrator
+I want to be able to install , with an url I provide, my own catalog of Shipwright Builds Strategies via the Shipwright Operator
+So that I can provide a custom subset of Shipwright Build Strategies to my developers
+
+### Implementation Notes
+
+#### API
+
+We propose to add a new custom resource  the `ShipwrightBuildStrategy`.
+
+```yaml
+apiVersion: operator.shipwright.io/v1alpha1
+kind: ShipwrightBuildStrategy
+metadata:
+  name: buildStrategy
+spec:
+  targetNamespace:
+  catalog:
+    url:
+```
+
+#### Controller
+
+Actually the Shipwright Operator uses controller-runtime package to bootstrap a manager 
+and setup the Shipwright Build controller within that manager.
+In the target implementation we will continue using controller-runtime
+We will split the controllers each acheiving a specific function in its own package:
+- shipwrightbuild controller to reconcile ShipwrightBuild CRD and installs Shipwright Build manifests
+- shipwrightbuilstrategy controller to reconcile  ShipwrightBuildStrategy CRD and installs Shipwright Build Strategy catalog.
+The main package will bootstrap a controller manager and adds all the controllers to the manager.
+We propose this layer for package organisation
+
+```go
+main.go 
+controllers
+  controller.go
+  add_shipwrightbuild.go
+  add_shipwrightbuildstrategy.go
+  shipwrightbuild
+    shipwrightbuild_controller.go
+  shipwrightbuildstragegy
+     shipwrightbuildstrategy_controller.go
+```
+
+the controller package handles the list of AddToManagerFuncs
+and add to the manager any controller that register itself at package init time
+
+```go
+// AddToManagerFuncs is a list of functions to add all Controllers to the Manager
+var AddToManagerFuncs []func(manager.Manager) error
+
+// AddToManager adds all Controllers to the Manager
+func AddToManager(m manager.Manager) error {
+	for _, f := range AddToManagerFuncs {
+		if err := f(m); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+```
+
+add_shipwrightbuild.go contains
+
+```go
+func init() {
+	// AddToManagerFuncs is a list of functions to create controllers and add them to a manager.
+	AddToManagerFuncs = append(AddToManagerFuncs, shipwrightbuild.Add)
+}
+
+```
+
+add_shipwrightbuildstrategy.go contains
+
+```go
+func init() {
+	// AddToManagerFuncs is a list of functions to create controllers and add them to a manager.
+	AddToManagerFuncs = append(AddToManagerFuncs, shipwrightbuildstrategy.Add)
+}
+
+```
+
+### Test Plan
+
+The implementation has to be tested on a `unit`, `integration` and `e2e` level to ensure correctness.
+
+### Release Criteria
+
+tbd
+
+### Risks and Mitigations
+
+The default strategy catalog or any url provided catalog can be unreachable if the kubernetes cluster needs
+- a proxy to access to the catalog url
+- it is a disconnected cluster and doesnt have any access to internet
+
+## Drawbacks
+
+
+## Alternatives
+
+
+## Infrastructure Needed [optional]
+
+
+## Implementation History
+