mirror of
https://gitea.com/Lydanne/buildx.git
synced 2025-11-04 18:13:42 +08:00
119 lines
2.8 KiB
Go
119 lines
2.8 KiB
Go
/*
|
|
Copyright 2018 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 fieldpath
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
"sigs.k8s.io/structured-merge-diff/v4/value"
|
|
)
|
|
|
|
// Path describes how to select a potentially deeply-nested child field given a
|
|
// containing object.
|
|
type Path []PathElement
|
|
|
|
func (fp Path) String() string {
|
|
strs := make([]string, len(fp))
|
|
for i := range fp {
|
|
strs[i] = fp[i].String()
|
|
}
|
|
return strings.Join(strs, "")
|
|
}
|
|
|
|
// Equals returns true if the two paths are equivalent.
|
|
func (fp Path) Equals(fp2 Path) bool {
|
|
if len(fp) != len(fp2) {
|
|
return false
|
|
}
|
|
for i := range fp {
|
|
if !fp[i].Equals(fp2[i]) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Less provides a lexical order for Paths.
|
|
func (fp Path) Compare(rhs Path) int {
|
|
i := 0
|
|
for {
|
|
if i >= len(fp) && i >= len(rhs) {
|
|
// Paths are the same length and all items are equal.
|
|
return 0
|
|
}
|
|
if i >= len(fp) {
|
|
// LHS is shorter.
|
|
return -1
|
|
}
|
|
if i >= len(rhs) {
|
|
// RHS is shorter.
|
|
return 1
|
|
}
|
|
if c := fp[i].Compare(rhs[i]); c != 0 {
|
|
return c
|
|
}
|
|
// The items are equal; continue.
|
|
i++
|
|
}
|
|
}
|
|
|
|
func (fp Path) Copy() Path {
|
|
new := make(Path, len(fp))
|
|
copy(new, fp)
|
|
return new
|
|
}
|
|
|
|
// MakePath constructs a Path. The parts may be PathElements, ints, strings.
|
|
func MakePath(parts ...interface{}) (Path, error) {
|
|
var fp Path
|
|
for _, p := range parts {
|
|
switch t := p.(type) {
|
|
case PathElement:
|
|
fp = append(fp, t)
|
|
case int:
|
|
// TODO: Understand schema and object and convert this to the
|
|
// FieldSpecifier below if appropriate.
|
|
fp = append(fp, PathElement{Index: &t})
|
|
case string:
|
|
fp = append(fp, PathElement{FieldName: &t})
|
|
case *value.FieldList:
|
|
if len(*t) == 0 {
|
|
return nil, fmt.Errorf("associative list key type path elements must have at least one key (got zero)")
|
|
}
|
|
fp = append(fp, PathElement{Key: t})
|
|
case value.Value:
|
|
// TODO: understand schema and verify that this is a set type
|
|
// TODO: make a copy of t
|
|
fp = append(fp, PathElement{Value: &t})
|
|
default:
|
|
return nil, fmt.Errorf("unable to make %#v into a path element", p)
|
|
}
|
|
}
|
|
return fp, nil
|
|
}
|
|
|
|
// MakePathOrDie panics if parts can't be turned into a path. Good for things
|
|
// that are known at complie time.
|
|
func MakePathOrDie(parts ...interface{}) Path {
|
|
fp, err := MakePath(parts...)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return fp
|
|
}
|