mirror of
https://github.com/kubevela/kubevela.git
synced 2026-05-11 03:47:59 +00:00
115 lines
2.9 KiB
Go
115 lines
2.9 KiB
Go
/*
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Copyright 2026 The KubeVela 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 schema
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import (
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"strings"
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"cuelang.org/go/cue/ast"
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"cuelang.org/go/cue/parser"
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"github.com/oam-dev/kubevela/pkg/appfile"
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)
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// ImmutableFieldsFromTemplate parses a CUE template string and returns the set of
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// dotted parameter field paths that are marked with the +immutable comment marker.
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func ImmutableFieldsFromTemplate(templateStr string) map[string]bool {
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if templateStr == "" {
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return nil
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}
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f, err := parser.ParseFile("-", templateStr, parser.ParseComments)
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if err != nil {
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return nil
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}
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paramStruct := getParameterStruct(f)
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if paramStruct == nil {
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return nil
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}
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immutableFields := make(map[string]bool)
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collectImmutableFields(paramStruct, "", immutableFields)
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if len(immutableFields) == 0 {
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return nil
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}
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return immutableFields
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}
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// collectImmutableFields recursively walks a struct, collecting dotted
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// paths of fields marked with +immutable into the result map.
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func collectImmutableFields(structLit *ast.StructLit, prefix string, result map[string]bool) {
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for _, element := range structLit.Elts {
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field, ok := element.(*ast.Field)
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if !ok {
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continue
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}
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name := extractFieldName(field)
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if name == "" {
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continue
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}
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fieldPath := name
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if prefix != "" {
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fieldPath = prefix + "." + name
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}
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if hasImmutableComment(field) {
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result[fieldPath] = true
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continue
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}
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if nested, ok := field.Value.(*ast.StructLit); ok {
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collectImmutableFields(nested, fieldPath, result)
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}
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}
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}
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// getParameterStruct gets the top-level `parameter` struct
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func getParameterStruct(f *ast.File) *ast.StructLit {
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for _, decl := range f.Decls {
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field, ok := decl.(*ast.Field)
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if !ok || extractFieldName(field) != "parameter" {
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continue
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}
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if structLit, ok := field.Value.(*ast.StructLit); ok {
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return structLit
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}
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}
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return nil
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}
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// hasImmutableComment reports whether any comment group attached to field
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// contains a line matching the +immutable marker.
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func hasImmutableComment(field *ast.Field) bool {
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for _, commentGroup := range field.Comments() {
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for _, comment := range commentGroup.List {
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marker := strings.TrimSpace(strings.TrimPrefix(comment.Text, "//"))
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if marker == appfile.ImmutableTag {
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return true
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}
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}
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}
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return false
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}
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func extractFieldName(field *ast.Field) string {
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switch label := field.Label.(type) {
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case *ast.Ident:
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return label.Name
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case *ast.BasicLit:
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return strings.Trim(label.Value, `"`)
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}
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return ""
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}
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