text: /*
  Copyright 2016 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 generators
  
  import (
  	"fmt"
  	"path"
  	"path/filepath"
  	"strings"
  
  	"k8s.io/gengo/args"
  	"k8s.io/gengo/generator"
  	"k8s.io/gengo/namer"
  	"k8s.io/gengo/types"
  	"k8s.io/klog"
  
  	"k8s.io/code-generator/cmd/client-gen/generators/util"
  	clientgentypes "k8s.io/code-generator/cmd/client-gen/types"
  	informergenargs "k8s.io/code-generator/cmd/informer-gen/args"
  )
  
  // NameSystems returns the name system used by the generators in this package.
  func NameSystems() namer.NameSystems {
  	pluralExceptions := map[string]string{
  		"Endpoints": "Endpoints",
  	}
  	return namer.NameSystems{
  		"public":             namer.NewPublicNamer(0),
  		"private":            namer.NewPrivateNamer(0),
  		"raw":                namer.NewRawNamer("", nil),
  		"publicPlural":       namer.NewPublicPluralNamer(pluralExceptions),
  		"allLowercasePlural": namer.NewAllLowercasePluralNamer(pluralExceptions),
  		"lowercaseSingular":  &lowercaseSingularNamer{},
  	}
  }
  
  // lowercaseSingularNamer implements Namer
  type lowercaseSingularNamer struct{}
  
  // Name returns t's name in all lowercase.
  func (n *lowercaseSingularNamer) Name(t *types.Type) string {
  	return strings.ToLower(t.Name.Name)
  }
  
  // DefaultNameSystem returns the default name system for ordering the types to be
  // processed by the generators in this package.
  func DefaultNameSystem() string {
  	return "public"
  }
  
  // objectMetaForPackage returns the type of ObjectMeta used by package p.
  func objectMetaForPackage(p *types.Package) (*types.Type, bool, error) {
  	generatingForPackage := false
  	for _, t := range p.Types {
  		if !util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...)).GenerateClient {
  			continue
  		}
  		generatingForPackage = true
  		for _, member := range t.Members {
  			if member.Name == "ObjectMeta" {
  				return member.Type, isInternal(member), nil
  			}
  		}
  	}
  	if generatingForPackage {
  		return nil, false, fmt.Errorf("unable to find ObjectMeta for any types in package %s", p.Path)
  	}
  	return nil, false, nil
  }
  
  // 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 packageForInternalInterfaces(base string) string {
  	return filepath.Join(base, "internalinterfaces")
  }
  
  func vendorless(p string) string {
  	if pos := strings.LastIndex(p, "/vendor/"); pos != -1 {
  		return p[pos+len("/vendor/"):]
  	}
  	return p
  }
  
  // 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)
  	}
  
  	internalVersionPackagePath := filepath.Join(arguments.OutputPackagePath)
  	externalVersionPackagePath := filepath.Join(arguments.OutputPackagePath)
  	if !customArgs.SingleDirectory {
  		internalVersionPackagePath = filepath.Join(arguments.OutputPackagePath, "internalversion")
  		externalVersionPackagePath = filepath.Join(arguments.OutputPackagePath, "externalversions")
  	}
  
  	var packageList generator.Packages
  	typesForGroupVersion := make(map[clientgentypes.GroupVersion][]*types.Type)
  
  	externalGroupVersions := make(map[string]clientgentypes.GroupVersions)
  	internalGroupVersions := make(map[string]clientgentypes.GroupVersions)
  	groupGoNames := make(map[string]string)
  	for _, inputDir := range arguments.InputDirs {
  		p := context.Universe.Package(vendorless(inputDir))
  
  		objectMeta, internal, err := objectMetaForPackage(p)
  		if err != nil {
  			klog.Fatal(err)
  		}
  		if objectMeta == nil {
  			// no types in this package had genclient
  			continue
  		}
  
  		var gv clientgentypes.GroupVersion
  		var targetGroupVersions map[string]clientgentypes.GroupVersions
  
  		if internal {
  			lastSlash := strings.LastIndex(p.Path, "/")
  			if lastSlash == -1 {
  				klog.Fatalf("error constructing internal group version for package %q", p.Path)
  			}
  			gv.Group = clientgentypes.Group(p.Path[lastSlash+1:])
  			targetGroupVersions = internalGroupVersions
  		} else {
  			parts := strings.Split(p.Path, "/")
  			gv.Group = clientgentypes.Group(parts[len(parts)-2])
  			gv.Version = clientgentypes.Version(parts[len(parts)-1])
  			targetGroupVersions = externalGroupVersions
  		}
  		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])
  		}
  
  		var typesToGenerate []*types.Type
  		for _, t := range p.Types {
  			tags := util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
  			if !tags.GenerateClient || tags.NoVerbs || !tags.HasVerb("list") || !tags.HasVerb("watch") {
  				continue
  			}
  
  			typesToGenerate = append(typesToGenerate, t)
  
  			if _, ok := typesForGroupVersion[gv]; !ok {
  				typesForGroupVersion[gv] = []*types.Type{}
  			}
  			typesForGroupVersion[gv] = append(typesForGroupVersion[gv], t)
  		}
  		if len(typesToGenerate) == 0 {
  			continue
  		}
  
  		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
  
  		orderer := namer.Orderer{Namer: namer.NewPrivateNamer(0)}
  		typesToGenerate = orderer.OrderTypes(typesToGenerate)
  
  		if internal {
  			packageList = append(packageList, versionPackage(internalVersionPackagePath, groupPackageName, gv, groupGoNames[groupPackageName], boilerplate, typesToGenerate, customArgs.InternalClientSetPackage, customArgs.ListersPackage))
  		} else {
  			packageList = append(packageList, versionPackage(externalVersionPackagePath, groupPackageName, gv, groupGoNames[groupPackageName], boilerplate, typesToGenerate, customArgs.VersionedClientSetPackage, customArgs.ListersPackage))
  		}
  	}
  
  	if len(externalGroupVersions) != 0 {
  		packageList = append(packageList, factoryInterfacePackage(externalVersionPackagePath, boilerplate, customArgs.VersionedClientSetPackage))
  		packageList = append(packageList, factoryPackage(externalVersionPackagePath, boilerplate, groupGoNames, externalGroupVersions, customArgs.VersionedClientSetPackage, typesForGroupVersion))
  		for _, gvs := range externalGroupVersions {
  			packageList = append(packageList, groupPackage(externalVersionPackagePath, gvs, boilerplate))
  		}
  	}
  
  	if len(internalGroupVersions) != 0 {
  		packageList = append(packageList, factoryInterfacePackage(internalVersionPackagePath, boilerplate, customArgs.InternalClientSetPackage))
  		packageList = append(packageList, factoryPackage(internalVersionPackagePath, boilerplate, groupGoNames, internalGroupVersions, customArgs.InternalClientSetPackage, typesForGroupVersion))
  		for _, gvs := range internalGroupVersions {
  			packageList = append(packageList, groupPackage(internalVersionPackagePath, gvs, boilerplate))
  		}
  	}
  
  	return packageList
  }
  
  func factoryPackage(basePackage string, boilerplate []byte, groupGoNames map[string]string, groupVersions map[string]clientgentypes.GroupVersions, clientSetPackage string, typesForGroupVersion map[clientgentypes.GroupVersion][]*types.Type) generator.Package {
  	return &generator.DefaultPackage{
  		PackageName: filepath.Base(basePackage),
  		PackagePath: basePackage,
  		HeaderText:  boilerplate,
  		GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
  			generators = append(generators, &factoryGenerator{
  				DefaultGen: generator.DefaultGen{
  					OptionalName: "factory",
  				},
  				outputPackage:             basePackage,
  				imports:                   generator.NewImportTracker(),
  				groupVersions:             groupVersions,
  				clientSetPackage:          clientSetPackage,
  				internalInterfacesPackage: packageForInternalInterfaces(basePackage),
  				gvGoNames:                 groupGoNames,
  			})
  
  			generators = append(generators, &genericGenerator{
  				DefaultGen: generator.DefaultGen{
  					OptionalName: "generic",
  				},
  				outputPackage:        basePackage,
  				imports:              generator.NewImportTracker(),
  				groupVersions:        groupVersions,
  				typesForGroupVersion: typesForGroupVersion,
  				groupGoNames:         groupGoNames,
  			})
  
  			return generators
  		},
  	}
  }
  
  func factoryInterfacePackage(basePackage string, boilerplate []byte, clientSetPackage string) generator.Package {
  	packagePath := packageForInternalInterfaces(basePackage)
  
  	return &generator.DefaultPackage{
  		PackageName: filepath.Base(packagePath),
  		PackagePath: packagePath,
  		HeaderText:  boilerplate,
  		GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
  			generators = append(generators, &factoryInterfaceGenerator{
  				DefaultGen: generator.DefaultGen{
  					OptionalName: "factory_interfaces",
  				},
  				outputPackage:    packagePath,
  				imports:          generator.NewImportTracker(),
  				clientSetPackage: clientSetPackage,
  			})
  
  			return generators
  		},
  	}
  }
  
  func groupPackage(basePackage string, groupVersions clientgentypes.GroupVersions, boilerplate []byte) generator.Package {
  	packagePath := filepath.Join(basePackage, groupVersions.PackageName)
  	groupPkgName := strings.Split(string(groupVersions.PackageName), ".")[0]
  
  	return &generator.DefaultPackage{
  		PackageName: groupPkgName,
  		PackagePath: packagePath,
  		HeaderText:  boilerplate,
  		GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
  			generators = append(generators, &groupInterfaceGenerator{
  				DefaultGen: generator.DefaultGen{
  					OptionalName: "interface",
  				},
  				outputPackage:             packagePath,
  				groupVersions:             groupVersions,
  				imports:                   generator.NewImportTracker(),
  				internalInterfacesPackage: packageForInternalInterfaces(basePackage),
  			})
  			return generators
  		},
  		FilterFunc: func(c *generator.Context, t *types.Type) bool {
  			tags := util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
  			return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("watch")
  		},
  	}
  }
  
  func versionPackage(basePackage string, groupPkgName string, gv clientgentypes.GroupVersion, groupGoName string, boilerplate []byte, typesToGenerate []*types.Type, clientSetPackage, listersPackage string) generator.Package {
  	packagePath := filepath.Join(basePackage, groupPkgName, strings.ToLower(gv.Version.NonEmpty()))
  
  	return &generator.DefaultPackage{
  		PackageName: strings.ToLower(gv.Version.NonEmpty()),
  		PackagePath: packagePath,
  		HeaderText:  boilerplate,
  		GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
  			generators = append(generators, &versionInterfaceGenerator{
  				DefaultGen: generator.DefaultGen{
  					OptionalName: "interface",
  				},
  				outputPackage:             packagePath,
  				imports:                   generator.NewImportTracker(),
  				types:                     typesToGenerate,
  				internalInterfacesPackage: packageForInternalInterfaces(basePackage),
  			})
  
  			for _, t := range typesToGenerate {
  				generators = append(generators, &informerGenerator{
  					DefaultGen: generator.DefaultGen{
  						OptionalName: strings.ToLower(t.Name.Name),
  					},
  					outputPackage:             packagePath,
  					groupPkgName:              groupPkgName,
  					groupVersion:              gv,
  					groupGoName:               groupGoName,
  					typeToGenerate:            t,
  					imports:                   generator.NewImportTracker(),
  					clientSetPackage:          clientSetPackage,
  					listersPackage:            listersPackage,
  					internalInterfacesPackage: packageForInternalInterfaces(basePackage),
  				})
  			}
  			return generators
  		},
  		FilterFunc: func(c *generator.Context, t *types.Type) bool {
  			tags := util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
  			return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("watch")
  		},
  	}
  }
  