Add Gopkg dependency for kubernetes code-generator.

The code generator should not be run from HEAD, as it will generate code
that diverges from the pinned version of client-go, and also any
previously generated CRD controller clients.

This change pins both code generator and client-go to the specified
kubernetes release, and ensures the update-codegen.sh script uses the
code-generator specified in the vendor directory rather than HEAD. This
ensures the build is always reproducible.

Gopkg.toml

@@ -24,6 +24,13 @@
 #   go-tests = true
 #   unused-packages = true
 
+required = [
+  "k8s.io/code-generator/cmd/defaulter-gen",
+  "k8s.io/code-generator/cmd/deepcopy-gen",
+  "k8s.io/code-generator/cmd/client-gen",
+  "k8s.io/code-generator/cmd/lister-gen",
+  "k8s.io/code-generator/cmd/informer-gen",
+]
 
 [[constraint]]
   name = "github.com/argoproj/argo"
@@ -117,10 +124,6 @@
   branch = "release-1.9"
   name = "k8s.io/apimachinery"
 
-[[constraint]]
-  branch = "release-6.0"
-  name = "k8s.io/client-go"
-
 [[constraint]]
   name = "k8s.io/kubernetes"
   version = "1.11.1"
@@ -129,6 +132,10 @@
   go-tests = true
   unused-packages = true
 
+   [[prune.project]]
+    name = "k8s.io/code-generator"
+    unused-packages = false
+
 [[override]]
   branch = "release-1.11"
   name = "k8s.io/apimachinery"
@@ -138,9 +145,15 @@
   name = "k8s.io/api"
 
 [[override]]
-  branch = "release-8.0"
   name = "k8s.io/client-go"
+  # revision for tag "kubernetes-1.11.1"
+  revision = "59698c7d9724b0f95f9dc9e7f7dfdcc3dfeceb82"
 
 [[override]]
   name = "github.com/spf13/pflag"
   version = "1.0.1"
+
+[[override]]
+  name = "k8s.io/code-generator"
+  # revision for tag "kubernetes-1.11.1"
+  revision = "6702109cc68eb6fe6350b83e14407c8d7309fd1a"

backend/src/crd/README.md

@@ -1,13 +1,12 @@
 ## Scheduled Workflow CRD/controller
 
-### How to generate the API client code from the API specification? 
+### How to generate the API client code from the API specification?
 
 Get the dependencies:
 
 ```
+dep ensure
 go get -u ./...
-go get -u k8s.io/client-go/...
-go get -u k8s.io/code-generator/...
 ```
 
 Generate the API client code from the API specification:
@@ -16,11 +15,11 @@ Generate the API client code from the API specification:
 ./hack/update-codegen.sh
 ```
 
-### How to run the ScheduledWorkflow controller from the command line? 
+### How to run the ScheduledWorkflow controller from the command line?
 
 The following assumes that your Kubernetes configuration file is located at '$HOME/.kube/config'.
 
-To create the resource for the CRD, execute: 
+To create the resource for the CRD, execute:
 
 ```
 kubectl create -f ./install/manifests/scheduledworkflow-crd.yaml
@@ -32,7 +31,7 @@ Output:
 customresourcedefinition.apiextensions.k8s.io "scheduledworkflows.kubeflow.org" created
 ```
 
-To run the controller locally, execute: 
+To run the controller locally, execute:
 configuration file
 
 ```
@@ -47,19 +46,19 @@ Started workers
 Wait for shut down
 ```
 
-To run a sample workflow on a schedule, execute: 
+To run a sample workflow on a schedule, execute:
 
 ```
 kubectl create -f ./samples/scheduledworkflow/every-minute-cron.yaml
 ```
 
-Output: 
+Output:
 
 ```
 scheduledworkflow.kubeflow.org "every-minute-cron" created
 ```
 
-To see the current list of ScheduledWorkflows, execute: 
+To see the current list of ScheduledWorkflows, execute:
 
 ```
 kubectl get swf
@@ -72,7 +71,7 @@ NAME                AGE
 every-minute-cron   1m
 ```
 
-To see the current status of the ScheduledWorklfow named 'every-minute-cron', execute: 
+To see the current status of the ScheduledWorklfow named 'every-minute-cron', execute:
 
 ```
 kubectl describe swf every-minute-cron
@@ -89,7 +88,7 @@ Annotations:  <none>
 API Version:  kubeflow.org/v1alpha1
 Kind:         ScheduledWorkflow
 Metadata:
-  Cluster Name:        
+  Cluster Name:
   Creation Timestamp:  2018-06-06T01:24:55Z
   Generation:          0
   Initializers:        <nil>
@@ -116,7 +115,7 @@ Spec:
           Command:
             cowsay
           Image:  docker/whalesay
-          Name:   
+          Name:
           Resources:
         Inputs:
           Parameters:
@@ -150,4 +149,4 @@ Status:
       UID:           b0b63a82-692a-11e8-9fd5-42010a8a0021
       [...]
 ```
-### 
+###

backend/src/crd/hack/update-codegen.sh

@@ -21,12 +21,13 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-SCRIPT_ROOT=$(dirname ${BASH_SOURCE})/..
+SCRIPT_ROOT=$(dirname ${BASH_SOURCE})
 echo "SCRIPT_ROOT is $SCRIPT_ROOT"
-CODEGEN_PKG=${SCRIPT_ROOT}/../../../../../../k8s.io/code-generator
+CODEGEN_PKG=${SCRIPT_ROOT}/../../../../vendor/k8s.io/code-generator
 echo "CODEGEN_PKG is $CODEGEN_PKG"
 
 ${CODEGEN_PKG}/generate-groups.sh "deepcopy,client,informer,lister" \
-  github.com/kubeflow/pipelines/backend/src/crd/pkg/client github.com/kubeflow/pipelines/backend/src/crd/pkg/apis \
+  github.com/kubeflow/pipelines/backend/src/crd/pkg/client \
+  github.com/kubeflow/pipelines/backend/src/crd/pkg/apis \
   scheduledworkflow:v1alpha1 \
-  --go-header-file ${SCRIPT_ROOT}/hack/custom-boilerplate.go.txt
+  --go-header-file ${SCRIPT_ROOT}/custom-boilerplate.go.txt