// Copyright 2024 CloudWeGo 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 version

import (
	"bytes"
	"runtime/debug"
	"text/template"
)

var buildInfoTmpl = ` mod	{{.Main.Path}}	{{.Main.Version}}	{{.Main.Sum}}
{{range .Deps}} dep	{{.Path}}	{{.Version}}	{{.Sum}}{{if .Replace}}
	=> {{.Replace.Path}}	{{.Replace.Version}}	{{.Replace.Sum}}{{end}}
{{end}}`

var buildInfo *debug.BuildInfo

func init() {
	buildInfo, _ = debug.ReadBuildInfo()
}

func moduleBuildInfo() string {
	if buildInfo == nil {
		return "not built in module mode"
	}

	buf := new(bytes.Buffer)
	err := template.Must(template.New("buildinfo").Parse(buildInfoTmpl)).Execute(buf, buildInfo)
	if err != nil {
		panic(err)
	}
	return buf.String()
}
