112 lines
3.1 KiB
Go
112 lines
3.1 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package namer
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import (
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"sort"
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"k8s.io/gengo/types"
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)
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// ImportTracker may be passed to a namer.RawNamer, to track the imports needed
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// for the types it names.
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//
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// TODO: pay attention to the package name (instead of renaming every package).
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type DefaultImportTracker struct {
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pathToName map[string]string
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// forbidden names are in here. (e.g. "go" is a directory in which
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// there is code, but "go" is not a legal name for a package, so we put
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// it here to prevent us from naming any package "go")
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nameToPath map[string]string
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local types.Name
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// Returns true if a given types is an invalid type and should be ignored.
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IsInvalidType func(*types.Type) bool
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// Returns the final local name for the given name
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LocalName func(types.Name) string
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// Returns the "import" line for a given (path, name).
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PrintImport func(string, string) string
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}
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func NewDefaultImportTracker(local types.Name) DefaultImportTracker {
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return DefaultImportTracker{
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pathToName: map[string]string{},
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nameToPath: map[string]string{},
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local: local,
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}
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}
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func (tracker *DefaultImportTracker) AddTypes(types ...*types.Type) {
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for _, t := range types {
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tracker.AddType(t)
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}
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}
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func (tracker *DefaultImportTracker) AddType(t *types.Type) {
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if tracker.local.Package == t.Name.Package {
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return
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}
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if tracker.IsInvalidType(t) {
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if t.Kind == types.Builtin {
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return
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}
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if _, ok := tracker.nameToPath[t.Name.Package]; !ok {
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tracker.nameToPath[t.Name.Package] = ""
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}
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return
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}
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if len(t.Name.Package) == 0 {
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return
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}
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path := t.Name.Path
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if len(path) == 0 {
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path = t.Name.Package
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}
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if _, ok := tracker.pathToName[path]; ok {
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return
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}
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name := tracker.LocalName(t.Name)
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tracker.nameToPath[name] = path
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tracker.pathToName[path] = name
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}
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func (tracker *DefaultImportTracker) ImportLines() []string {
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importPaths := []string{}
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for path := range tracker.pathToName {
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importPaths = append(importPaths, path)
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}
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sort.Sort(sort.StringSlice(importPaths))
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out := []string{}
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for _, path := range importPaths {
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out = append(out, tracker.PrintImport(path, tracker.pathToName[path]))
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}
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return out
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}
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// LocalNameOf returns the name you would use to refer to the package at the
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// specified path within the body of a file.
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func (tracker *DefaultImportTracker) LocalNameOf(path string) string {
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return tracker.pathToName[path]
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}
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// PathOf returns the path that a given localName is referring to within the
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// body of a file.
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func (tracker *DefaultImportTracker) PathOf(localName string) (string, bool) {
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name, ok := tracker.nameToPath[localName]
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return name, ok
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}
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