/
packages.go
599 lines (510 loc) · 20.3 KB
/
packages.go
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/*
Copyright 2019 The Knative 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 (
"path"
"path/filepath"
"strings"
"k8s.io/code-generator/cmd/client-gen/generators/util"
clientgentypes "k8s.io/code-generator/cmd/client-gen/types"
"k8s.io/gengo/args"
"k8s.io/gengo/generator"
"k8s.io/gengo/namer"
"k8s.io/gengo/types"
"k8s.io/klog"
informergenargs "knative.dev/pkg/codegen/cmd/injection-gen/args"
)
// Packages makes the client package definition.
func Packages(context *generator.Context, arguments *args.GeneratorArgs) generator.Packages {
boilerplate, err := arguments.LoadGoBoilerplate()
if err != nil {
klog.Fatalf("Failed loading boilerplate: %v", err)
}
customArgs, ok := arguments.CustomArgs.(*informergenargs.CustomArgs)
if !ok {
klog.Fatalf("Wrong CustomArgs type: %T", arguments.CustomArgs)
}
versionPackagePath := filepath.Join(arguments.OutputPackagePath)
var packageList generator.Packages
groupVersions := make(map[string]clientgentypes.GroupVersions)
groupGoNames := make(map[string]string)
for _, inputDir := range arguments.InputDirs {
p := context.Universe.Package(vendorless(inputDir))
var gv clientgentypes.GroupVersion
var targetGroupVersions map[string]clientgentypes.GroupVersions
parts := strings.Split(p.Path, "/")
gv.Group = clientgentypes.Group(parts[len(parts)-2])
gv.Version = clientgentypes.Version(parts[len(parts)-1])
targetGroupVersions = groupVersions
groupPackageName := gv.Group.NonEmpty()
gvPackage := path.Clean(p.Path)
// If there's a comment of the form "// +groupName=somegroup" or
// "// +groupName=somegroup.foo.bar.io", use the first field (somegroup) as the name of the
// group when generating.
if override := types.ExtractCommentTags("+", p.Comments)["groupName"]; override != nil {
gv.Group = clientgentypes.Group(override[0])
}
// If there's a comment of the form "// +groupGoName=SomeUniqueShortName", use that as
// the Go group identifier in CamelCase. It defaults
groupGoNames[groupPackageName] = namer.IC(strings.Split(gv.Group.NonEmpty(), ".")[0])
if override := types.ExtractCommentTags("+", p.Comments)["groupGoName"]; override != nil {
groupGoNames[groupPackageName] = namer.IC(override[0])
}
// Generate the client and fake.
packageList = append(packageList, versionClientsPackages(versionPackagePath, boilerplate, customArgs)...)
// Generate the informer factory and fake.
packageList = append(packageList, versionFactoryPackages(versionPackagePath, boilerplate, customArgs)...)
var typesWithInformers []*types.Type
var duckTypes []*types.Type
var reconcilerTypes []*types.Type
for _, t := range p.Types {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
if tags.NeedsInformerInjection() {
typesWithInformers = append(typesWithInformers, t)
}
if tags.NeedsDuckInjection() {
duckTypes = append(duckTypes, t)
}
if tags.NeedsReconciler() {
reconcilerTypes = append(reconcilerTypes, t)
}
}
groupVersionsEntry, ok := targetGroupVersions[groupPackageName]
if !ok {
groupVersionsEntry = clientgentypes.GroupVersions{
PackageName: groupPackageName,
Group: gv.Group,
}
}
groupVersionsEntry.Versions = append(groupVersionsEntry.Versions, clientgentypes.PackageVersion{Version: gv.Version, Package: gvPackage})
targetGroupVersions[groupPackageName] = groupVersionsEntry
if len(typesWithInformers) != 0 {
orderer := namer.Orderer{Namer: namer.NewPrivateNamer(0)}
typesWithInformers = orderer.OrderTypes(typesWithInformers)
// Generate the informer and fake, for each type.
packageList = append(packageList, versionInformerPackages(versionPackagePath, groupPackageName, gv, groupGoNames[groupPackageName], boilerplate, typesWithInformers, customArgs)...)
}
if len(duckTypes) != 0 {
orderer := namer.Orderer{Namer: namer.NewPrivateNamer(0)}
duckTypes = orderer.OrderTypes(duckTypes)
// Generate a duck-typed informer for each type.
packageList = append(packageList, versionDuckPackages(versionPackagePath, groupPackageName, gv, groupGoNames[groupPackageName], boilerplate, duckTypes, customArgs)...)
}
if len(reconcilerTypes) != 0 {
orderer := namer.Orderer{Namer: namer.NewPrivateNamer(0)}
reconcilerTypes = orderer.OrderTypes(reconcilerTypes)
// Generate a reconciler and controller for each type.
packageList = append(packageList, reconcilerPackages(versionPackagePath, groupPackageName, gv, groupGoNames[groupPackageName], boilerplate, reconcilerTypes, customArgs)...)
}
}
return packageList
}
// Tags represents a genclient configuration for a single type.
type Tags struct {
util.Tags
GenerateDuck bool
GenerateReconciler bool
}
func (t Tags) NeedsInformerInjection() bool {
return t.GenerateClient && !t.NoVerbs && t.HasVerb("list") && t.HasVerb("watch")
}
func (t Tags) NeedsDuckInjection() bool {
return t.GenerateDuck
}
func (t Tags) NeedsReconciler() bool {
return t.GenerateReconciler
}
// MustParseClientGenTags calls ParseClientGenTags but instead of returning error it panics.
func MustParseClientGenTags(lines []string) Tags {
ret := Tags{
Tags: util.MustParseClientGenTags(lines),
}
values := types.ExtractCommentTags("+", lines)
_, ret.GenerateDuck = values["genduck"]
_, genRec := values["genreconciler"]
_, genRecClass := values["genreconciler:class"]
// Generate Reconciler code if genreconciler OR genreconciler:class exist.
if genRec || genRecClass {
ret.GenerateReconciler = true
}
return ret
}
func extractReconcilerClassTag(t *types.Type) (string, bool) {
comments := append(append([]string{}, t.SecondClosestCommentLines...), t.CommentLines...)
values := types.ExtractCommentTags("+", comments)["genreconciler:class"]
for _, v := range values {
if len(v) == 0 {
continue
}
return v, true
}
return "", false
}
// isInternal returns true if the tags for a member do not contain a json tag
func isInternal(m types.Member) bool {
return !strings.Contains(m.Tags, "json")
}
func vendorless(p string) string {
if pos := strings.LastIndex(p, "/vendor/"); pos != -1 {
return p[pos+len("/vendor/"):]
}
return p
}
func typedInformerPackage(groupPkgName string, gv clientgentypes.GroupVersion, externalVersionsInformersPackage string) string {
return filepath.Join(externalVersionsInformersPackage, groupPkgName, gv.Version.String())
}
func versionClientsPackages(basePackage string, boilerplate []byte, customArgs *informergenargs.CustomArgs) []generator.Package {
packagePath := filepath.Join(basePackage, "client")
vers := make([]generator.Package, 0, 2)
// Impl
vers = append(vers, &generator.DefaultPackage{
PackageName: "client",
PackagePath: packagePath,
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &clientGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "client",
},
outputPackage: packagePath,
imports: generator.NewImportTracker(),
clientSetPackage: customArgs.VersionedClientSetPackage,
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsInformerInjection()
},
})
// Fake
vers = append(vers, &generator.DefaultPackage{
PackageName: "fake",
PackagePath: filepath.Join(packagePath, "fake"),
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &fakeClientGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "fake",
},
outputPackage: filepath.Join(packagePath, "fake"),
imports: generator.NewImportTracker(),
fakeClientPkg: filepath.Join(customArgs.VersionedClientSetPackage, "fake"),
clientInjectionPkg: packagePath,
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsInformerInjection()
},
})
return vers
}
func versionFactoryPackages(basePackage string, boilerplate []byte, customArgs *informergenargs.CustomArgs) []generator.Package {
packagePath := filepath.Join(basePackage, "informers", "factory")
vers := make([]generator.Package, 0, 2)
// Impl
vers = append(vers, &generator.DefaultPackage{
PackageName: "factory",
PackagePath: packagePath,
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &factoryGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "factory",
},
outputPackage: packagePath,
cachingClientSetPackage: filepath.Join(basePackage, "client"),
sharedInformerFactoryPackage: customArgs.ExternalVersionsInformersPackage,
imports: generator.NewImportTracker(),
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsInformerInjection()
},
})
// Fake
vers = append(vers, &generator.DefaultPackage{
PackageName: "fake",
PackagePath: filepath.Join(packagePath, "fake"),
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &fakeFactoryGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "fake",
},
outputPackage: filepath.Join(packagePath, "fake"),
factoryInjectionPkg: packagePath,
fakeClientInjectionPkg: filepath.Join(basePackage, "client", "fake"),
sharedInformerFactoryPackage: customArgs.ExternalVersionsInformersPackage,
imports: generator.NewImportTracker(),
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsInformerInjection()
},
})
return vers
}
func versionInformerPackages(basePackage string, groupPkgName string, gv clientgentypes.GroupVersion, groupGoName string, boilerplate []byte, typesToGenerate []*types.Type, customArgs *informergenargs.CustomArgs) []generator.Package {
factoryPackagePath := filepath.Join(basePackage, "informers", "factory")
packagePath := filepath.Join(basePackage, "informers", groupPkgName, strings.ToLower(gv.Version.NonEmpty()))
vers := make([]generator.Package, 0, len(typesToGenerate))
for _, t := range typesToGenerate {
// Fix for golang iterator bug.
t := t
packagePath := packagePath + "/" + strings.ToLower(t.Name.Name)
typedInformerPackage := typedInformerPackage(groupPkgName, gv, customArgs.ExternalVersionsInformersPackage)
// Impl
vers = append(vers, &generator.DefaultPackage{
PackageName: strings.ToLower(t.Name.Name),
PackagePath: packagePath,
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &injectionGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: strings.ToLower(t.Name.Name),
},
outputPackage: packagePath,
groupVersion: gv,
groupGoName: groupGoName,
typeToGenerate: t,
imports: generator.NewImportTracker(),
typedInformerPackage: typedInformerPackage,
groupInformerFactoryPackage: factoryPackagePath,
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsInformerInjection()
},
})
// Fake
vers = append(vers, &generator.DefaultPackage{
PackageName: "fake",
PackagePath: filepath.Join(packagePath, "fake"),
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &fakeInformerGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "fake",
},
outputPackage: filepath.Join(packagePath, "fake"),
imports: generator.NewImportTracker(),
typeToGenerate: t,
groupVersion: gv,
groupGoName: groupGoName,
informerInjectionPkg: packagePath,
fakeFactoryInjectionPkg: filepath.Join(factoryPackagePath, "fake"),
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsInformerInjection()
},
})
}
return vers
}
func reconcilerPackages(basePackage string, groupPkgName string, gv clientgentypes.GroupVersion, groupGoName string, boilerplate []byte, typesToGenerate []*types.Type, customArgs *informergenargs.CustomArgs) []generator.Package {
packagePath := filepath.Join(basePackage, "reconciler", groupPkgName, strings.ToLower(gv.Version.NonEmpty()))
vers := make([]generator.Package, 0, len(typesToGenerate))
for _, t := range typesToGenerate {
// Fix for golang iterator bug.
t := t
reconcilerClass, hasReconcilerClass := extractReconcilerClassTag(t)
packagePath := filepath.Join(packagePath, strings.ToLower(t.Name.Name))
clientPackagePath := filepath.Join(basePackage, "client")
informerPackagePath := filepath.Join(basePackage, "informers", groupPkgName, strings.ToLower(gv.Version.NonEmpty()), strings.ToLower(t.Name.Name))
listerPackagePath := filepath.Join(customArgs.ListersPackage, groupPkgName, strings.ToLower(gv.Version.NonEmpty()))
// Controller
vers = append(vers, &generator.DefaultPackage{
PackageName: strings.ToLower(t.Name.Name),
PackagePath: packagePath,
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &reconcilerControllerGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "controller",
},
typeToGenerate: t,
outputPackage: packagePath,
imports: generator.NewImportTracker(),
groupName: gv.Group.String(),
clientPkg: clientPackagePath,
informerPackagePath: informerPackagePath,
schemePkg: filepath.Join(customArgs.VersionedClientSetPackage, "scheme"),
reconcilerClass: reconcilerClass,
hasReconcilerClass: hasReconcilerClass,
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsReconciler()
},
})
// Controller Stub
vers = append(vers, &generator.DefaultPackage{
PackageName: strings.ToLower(t.Name.Name),
PackagePath: filepath.Join(packagePath, "stub"),
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &reconcilerControllerStubGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "controller",
},
typeToGenerate: t,
reconcilerPkg: packagePath,
outputPackage: filepath.Join(packagePath, "stub"),
imports: generator.NewImportTracker(),
informerPackagePath: informerPackagePath,
reconcilerClass: reconcilerClass,
hasReconcilerClass: hasReconcilerClass,
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsReconciler()
},
})
// Reconciler
vers = append(vers, &generator.DefaultPackage{
PackageName: strings.ToLower(t.Name.Name),
PackagePath: packagePath,
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &reconcilerReconcilerGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "reconciler",
},
typeToGenerate: t,
outputPackage: packagePath,
imports: generator.NewImportTracker(),
clientsetPkg: customArgs.VersionedClientSetPackage,
listerName: t.Name.Name + "Lister",
listerPkg: listerPackagePath,
groupGoName: groupGoName,
groupVersion: gv,
reconcilerClass: reconcilerClass,
hasReconcilerClass: hasReconcilerClass,
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsReconciler()
},
})
// Reconciler Stub
vers = append(vers, &generator.DefaultPackage{
PackageName: strings.ToLower(t.Name.Name),
PackagePath: filepath.Join(packagePath, "stub"),
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &reconcilerReconcilerStubGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "reconciler",
},
typeToGenerate: t,
reconcilerPkg: packagePath,
outputPackage: filepath.Join(packagePath, "stub"),
imports: generator.NewImportTracker(),
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsReconciler()
},
})
}
return vers
}
func versionDuckPackages(basePackage string, groupPkgName string, gv clientgentypes.GroupVersion, groupGoName string, boilerplate []byte, typesToGenerate []*types.Type, customArgs *informergenargs.CustomArgs) []generator.Package {
packagePath := filepath.Join(basePackage, "ducks", groupPkgName, strings.ToLower(gv.Version.NonEmpty()))
vers := make([]generator.Package, 0, len(typesToGenerate))
for _, t := range typesToGenerate {
// Fix for golang iterator bug.
t := t
packagePath := filepath.Join(packagePath, strings.ToLower(t.Name.Name))
// Impl
vers = append(vers, &generator.DefaultPackage{
PackageName: strings.ToLower(t.Name.Name),
PackagePath: packagePath,
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &duckGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: strings.ToLower(t.Name.Name),
},
outputPackage: packagePath,
groupVersion: gv,
groupGoName: groupGoName,
typeToGenerate: t,
imports: generator.NewImportTracker(),
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsDuckInjection()
},
})
// Fake
vers = append(vers, &generator.DefaultPackage{
PackageName: "fake",
PackagePath: filepath.Join(packagePath, "fake"),
HeaderText: boilerplate,
GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
// Impl
generators = append(generators, &fakeDuckGenerator{
DefaultGen: generator.DefaultGen{
OptionalName: "fake",
},
outputPackage: filepath.Join(packagePath, "fake"),
imports: generator.NewImportTracker(),
typeToGenerate: t,
groupVersion: gv,
groupGoName: groupGoName,
duckInjectionPkg: packagePath,
})
return generators
},
FilterFunc: func(c *generator.Context, t *types.Type) bool {
tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
return tags.NeedsDuckInjection()
},
})
}
return vers
}