mirror of https://github.com/k3s-io/k3s
72 lines
1.7 KiB
Go
72 lines
1.7 KiB
Go
/*
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Copyright 2018 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 kunstruct provides unstructured from api machinery and factory for creating unstructured
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package kunstruct
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import (
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"fmt"
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"strings"
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)
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func parseFields(path string) ([]string, error) {
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if !strings.Contains(path, "[") {
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return strings.Split(path, "."), nil
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}
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var fields []string
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start := 0
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insideParentheses := false
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for i := range path {
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switch path[i] {
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case '.':
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if !insideParentheses {
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fields = append(fields, path[start:i])
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start = i + 1
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}
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case '[':
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if !insideParentheses {
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if i == start {
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start = i + 1
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} else {
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fields = append(fields, path[start:i])
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start = i + 1
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}
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insideParentheses = true
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} else {
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return nil, fmt.Errorf("nested parentheses are not allowed: %s", path)
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}
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case ']':
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if insideParentheses {
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fields = append(fields, path[start:i])
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start = i + 1
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insideParentheses = false
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} else {
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return nil, fmt.Errorf("invalid field path %s", path)
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}
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}
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}
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if start < len(path)-1 {
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fields = append(fields, path[start:])
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}
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for i, f := range fields {
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if strings.HasPrefix(f, "\"") || strings.HasPrefix(f, "'") {
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fields[i] = strings.Trim(f, "\"'")
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}
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}
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return fields, nil
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}
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