forked from istio/tools
/
types.go
104 lines (90 loc) · 3.55 KB
/
types.go
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// Copyright 2019 Istio 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 generators
import (
"io"
"k8s.io/gengo/generator"
"k8s.io/gengo/namer"
"k8s.io/gengo/types"
"github.com/110y/kubetype-gen/cmd/kubetype-gen/metadata"
)
type typesGenerator struct {
generator.DefaultGen
source metadata.PackageMetadata
imports namer.ImportTracker
}
// NewTypesGenerator creates a new generator for creating k8s style types.go files
func NewTypesGenerator(source metadata.PackageMetadata) generator.Generator {
return &typesGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "types",
},
source: source,
imports: generator.NewImportTracker(),
}
}
func (g *typesGenerator) Namers(c *generator.Context) namer.NameSystems {
return NameSystems(g.source.TargetPackage().Path, g.imports)
}
func (g *typesGenerator) Imports(c *generator.Context) []string {
return g.imports.ImportLines()
}
func (g *typesGenerator) GenerateType(c *generator.Context, t *types.Type, w io.Writer) error {
kubeTypes := g.source.KubeTypes(t)
sw := generator.NewSnippetWriter(w, c, "$", "$")
m := map[string]interface{}{
"KubeType": nil,
"RawType": t,
"TypeMeta": c.Universe.Type(types.Name{Name: "TypeMeta", Package: "k8s.io/apimachinery/pkg/apis/meta/v1"}),
"ObjectMeta": c.Universe.Type(types.Name{Name: "ObjectMeta", Package: "k8s.io/apimachinery/pkg/apis/meta/v1"}),
"ListMeta": c.Universe.Type(types.Name{Name: "ListMeta", Package: "k8s.io/apimachinery/pkg/apis/meta/v1"}),
}
for _, kubeType := range kubeTypes {
// make sure local types get imports generated for them to prevent reusing their local name for real imports,
// e.g. generating into package v1alpha1, while also importing from another package ending with v1alpha1.
// adding the import here will ensure the imports will be something like, precedingpathv1alpha1.
g.imports.AddType(kubeType.Type())
m["KubeType"] = kubeType
sw.Do(kubeTypeTemplate, m)
}
return sw.Error()
}
const kubeTypeTemplate = `
$- range .RawType.SecondClosestCommentLines $
// $ . $
$- end $
$- range .KubeType.Tags $
// +$ . $
$- end $
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
$ range .RawType.CommentLines $
// $ . $
$- end $
type $.KubeType.Type|public$ struct {
$.TypeMeta|raw$ ` + "`" + `json:",inline"` + "`" + `
// +optional
$.ObjectMeta|raw$ ` + "`" + `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"` + "`" + `
// Spec defines the implementation of this definition.
// +optional
Spec $.RawType|raw$ ` + "`" + `json:"spec,omitempty" protobuf:"bytes,2,opt,name=spec"` + "`" + `
}
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
// $.KubeType.Type|public$List is a collection of $.KubeType.Type|publicPlural$.
type $.KubeType.Type|public$List struct {
$.TypeMeta|raw$ ` + "`" + `json:",inline"` + "`" + `
// +optional
$.ListMeta|raw$ ` + "`" + `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"` + "`" + `
Items []*$.KubeType.Type|raw$ ` + "`" + `json:"items" protobuf:"bytes,2,rep,name=items"` + "`" + `
}
`