mirror of
https://github.com/kubesphere/kubekey.git
synced 2025-12-26 01:22:51 +00:00
81 lines
2.7 KiB
Go
81 lines
2.7 KiB
Go
/*
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Copyright 2023 The KubeSphere 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 tmpl
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import (
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"bytes"
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"text/template"
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"github.com/cockroachdb/errors"
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kkprojectv1 "github.com/kubesphere/kubekey/api/project/v1"
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"k8s.io/klog/v2"
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)
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// ParseFunc parses a template string using the provided context and parse function.
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// It takes a context map C, an input string that may contain template syntax,
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// and a parse function that converts the template result to the desired Output type.
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// If the input is not a template, it directly applies the parse function.
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// For template inputs, it parses and executes the template with the context,
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// then applies the parse function to the result.
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// Returns the parsed output and any error encountered during template processing.
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func ParseFunc[C ~map[string]any, Output any](ctx C, input string, f func([]byte) Output) (Output, error) {
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// If input doesn't contain template syntax, return directly
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if !kkprojectv1.IsTmplSyntax(input) {
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return f([]byte(input)), nil
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}
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// Parse the template string
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tl, err := template.New("kubekey").Funcs(funcMap()).Parse(input)
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if err != nil {
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return f(nil), errors.Wrapf(err, "failed to parse template '%s'", input)
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}
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// Execute template with provided context
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result := bytes.NewBuffer(nil)
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if err := tl.Execute(result, ctx); err != nil {
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return f(nil), errors.Wrapf(err, "failed to execute template '%s'", input)
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}
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// Log successful parsing
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klog.V(6).InfoS(" parse template succeed", "result", result.String())
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// Apply parse function to result and return
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return f(result.Bytes()), nil
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}
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// Parse is a helper function that wraps ParseFunc to directly return bytes.
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// It takes a context map C and input string, and returns the parsed bytes.
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func Parse[C ~map[string]any](ctx C, input string) ([]byte, error) {
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return ParseFunc(ctx, input, func(o []byte) []byte {
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return o
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})
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}
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// ParseBool parse template string to bool
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func ParseBool(ctx map[string]any, inputs ...string) (bool, error) {
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for _, input := range inputs {
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output, err := ParseFunc(ctx, input, func(o []byte) bool {
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return bytes.EqualFold(o, []byte("true"))
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})
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if err != nil {
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return false, err
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}
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if !output {
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return output, nil
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}
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}
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return true, nil
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}
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