Ability to turn off mutating main.go when adding apis/webhooks

[christopherhein]

It would be nice to be able to set in the PROJECT that you didn't want the scaffolding to update main.go this would allow scaffolding to work for projects that move their scheme/controller initialization to another directory like cmd/. Today this still works properly if you are using it to create api but when you use create webhook it will fail and none of the files are created properly.

sigs.k8s.io/kb-test: k8s:kind-kind                                                                                                                                                               
→ kubebuilder init --domain example.com                                                                                                                                                          
Writing scaffold for you to edit...                                                                                                                                                              
Get controller runtime:                                                                                                                                                                          
$ go get sigs.k8s.io/controller-runtime@v0.5.0                                                                                                                                                   
Update go.mod:                                                                                                                                                                                   
$ go mod tidy                                                                                                                                                                                    
Running make:                                                                                                                                                                                   
$ make                                                                                                                                                                                           
/Users/chris/Code/bin/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."                                                                                                   
go fmt ./...                                                                                                                                                                                
go vet ./...                                                                                                                                                                                    
                                                                                                                                                                                              
go build -o bin/manager main.go
Next: define a resource with:
$ kubebuilder create api
insigs.k8s.io/kb-test: k8s:kind-kind
→ mkdir cmd
sigs.k8s.io/kb-test: k8s:kind-kind
→ mv main.go cmd
sigs.k8s.io/kb-test: k8s:kind-kind
→ kubebuilder create api --group crew --version v1beta1 --kind Frigate                           
Create Resource [y/n]
y
Create Controller [y/n]
y
Writing scaffold for you to edit...
api/v1beta1/frigate_types.go
controllers/frigate_controller.go
2020/10/11 14:41:14 failed to create API: error updating main.go: failed to open main.go: open main.go: no such file or directory
sigs.k8s.io/kb-test: k8s:kind-kind
→ ls -al api/v1beta1/
  rwx------  chris  staff   128 B    Sun Oct 11 14:41:14 2020    ./
  rwx------  chris  staff    96 B    Sun Oct 11 14:41:14 2020    ../
  rw-------  chris  staff     1 KiB  Sun Oct 11 14:41:14 2020    frigate_types.go 
  rw-------  chris  staff     1 KiB  Sun Oct 11 14:41:14 2020    groupversion_info.go 
sigs.k8s.io/kb-test: k8s:kind-kind
→ kubebuilder create webhook --defaulting --kind Frigate --group crew --version v1beta1          
Writing scaffold for you to edit...
api/v1beta1/frigate_webhook.go
2020/10/11 14:42:59 failed to create webhook: failed to open main.go: open main.go: no such file or directory
sigs.k8s.io/kb-test: k8s:kind-kind
→ ls -al api/v1beta1/                           
  rwx------  chris  staff   128 B    Sun Oct 11 14:41:14 2020    ./
  rwx------  chris  staff    96 B    Sun Oct 11 14:41:14 2020    ../
  rw-------  chris  staff     1 KiB  Sun Oct 11 14:41:14 2020    frigate_types.go 
  rw-------  chris  staff     1 KiB  Sun Oct 11 14:41:14 2020    groupversion_info.go 

RFE was requested from conversations in #1719

/kind feature

[camilamacedo86]

Hi @christopherhein,

Thank you for raise that.

It shows related to the issue #932. See the comment #932 (comment). In this way, it shows blocked until we are able to have the plugin phase 2 implemented to know how better we could address this scenario.

[camilamacedo86]

We discussed it in the bug triage meeting and then, was really decide that we might wait for the plugin phase 2 as well.

[christopherhein]

Sounds good, thanks @camilamacedo86 !

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