/*
Copyright 2022 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package templates

import (
	"sigs.k8s.io/kubebuilder/v4/pkg/machinery"
)

var _ machinery.Template = &DockerIgnore{}

// DockerIgnore scaffolds a file that defines which files should be ignored by the containerized build process
type DockerIgnore struct {
	machinery.TemplateMixin
}

// SetTemplateDefaults implements machinery.Template
func (f *DockerIgnore) SetTemplateDefaults() error {
	if f.Path == "" {
		f.Path = ".dockerignore"
	}

	f.TemplateBody = dockerignorefileTemplate

	return nil
}

const dockerignorefileTemplate = `# More info: https://docs.docker.com/engine/reference/builder/#dockerignore-file
# Ignore everything by default and re-include only needed files
**

# Re-include Go source files (but not *_test.go)
# If you use Podman, re-include your source directories by name,
# such as !cmd, !api, and !internal.
# See https://github.com/containers/buildah/issues/6417
!**/*.go
**/*_test.go

# Re-include Go module files
!go.mod
!go.sum
`
