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/*
Copyright 2015 The Kubernetes Authors All rights reserved.
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 namer
import (
"sort"
"k8s.io/kubernetes/cmd/libs/go2idl/types"
)
// ImportTracker may be passed to a namer.RawNamer, to track the imports needed
// for the types it names.
//
// TODO: pay attention to the package name (instead of renaming every package).
type DefaultImportTracker struct {
pathToName map[string]string
// forbidden names are in here. (e.g. "go" is a directory in which
// there is code, but "go" is not a legal name for a package, so we put
// it here to prevent us from naming any package "go")
nameToPath map[string]string
local types.Name
// Returns true if a given types is an invalid type and should be ignored.
IsInvalidType func(*types.Type) bool
// Returns the final local name for the given name
LocalName func(types.Name) string
// Returns the "import" line for a given (path, name).
PrintImport func(string, string) string
}
func NewDefaultImportTracker(local types.Name) DefaultImportTracker {
return DefaultImportTracker{
pathToName: map[string]string{},
nameToPath: map[string]string{},
local: local,
}
}
func (tracker *DefaultImportTracker) AddTypes(types ...*types.Type) {
for _, t := range types {
tracker.AddType(t)
}
}
func (tracker *DefaultImportTracker) AddType(t *types.Type) {
if tracker.local.Package == t.Name.Package {
return
}
if tracker.IsInvalidType(t) {
if t.Kind == types.Builtin {
return
}
if _, ok := tracker.nameToPath[t.Name.Package]; !ok {
tracker.nameToPath[t.Name.Package] = ""
}
return
}
if len(t.Name.Package) == 0 {
return
}
path := t.Name.Path
if len(path) == 0 {
path = t.Name.Package
}
if _, ok := tracker.pathToName[path]; ok {
return
}
name := tracker.LocalName(t.Name)
tracker.nameToPath[name] = path
tracker.pathToName[path] = name
}
func (tracker *DefaultImportTracker) ImportLines() []string {
importPaths := []string{}
for path := range tracker.pathToName {
importPaths = append(importPaths, path)
}
sort.Sort(sort.StringSlice(importPaths))
out := []string{}
for _, path := range importPaths {
out = append(out, tracker.PrintImport(path, tracker.pathToName[path]))
}
return out
}
// LocalNameOf returns the name you would use to refer to the package at the
// specified path within the body of a file.
func (tracker *DefaultImportTracker) LocalNameOf(path string) string {
return tracker.pathToName[path]
}
// PathOf returns the path that a given localName is referring to within the
// body of a file.
func (tracker *DefaultImportTracker) PathOf(localName string) (string, bool) {
name, ok := tracker.nameToPath[localName]
return name, ok
}
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