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// Copyright 2016 The Prometheus 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"
"fmt"
"runtime"
"runtime/debug"
"strings"
"text/template"
)
// Build information. Populated at build-time.
var (
Version string
Revision string
Branch string
BuildUser string
BuildDate string
GoVersion = runtime.Version()
GoOS = runtime.GOOS
GoArch = runtime.GOARCH
computedRevision string
computedTags string
)
// versionInfoTmpl contains the template used by Info.
var versionInfoTmpl = `
{{.program}}, version {{.version}} (branch: {{.branch}}, revision: {{.revision}})
build user: {{.buildUser}}
build date: {{.buildDate}}
go version: {{.goVersion}}
platform: {{.platform}}
tags: {{.tags}}
`
// Print returns version information.
func Print(program string) string {
m := map[string]string{
"program": program,
"version": Version,
"revision": GetRevision(),
"branch": Branch,
"buildUser": BuildUser,
"buildDate": BuildDate,
"goVersion": GoVersion,
"platform": GoOS + "/" + GoArch,
"tags": GetTags(),
}
t := template.Must(template.New("version").Parse(versionInfoTmpl))
var buf bytes.Buffer
if err := t.ExecuteTemplate(&buf, "version", m); err != nil {
panic(err)
}
return strings.TrimSpace(buf.String())
}
// Info returns version, branch and revision information.
func Info() string {
return fmt.Sprintf("(version=%s, branch=%s, revision=%s)", Version, Branch, GetRevision())
}
// BuildContext returns goVersion, platform, buildUser and buildDate information.
func BuildContext() string {
return fmt.Sprintf("(go=%s, platform=%s, user=%s, date=%s, tags=%s)", GoVersion, GoOS+"/"+GoArch, BuildUser, BuildDate, GetTags())
}
func GetRevision() string {
if Revision != "" {
return Revision
}
return computedRevision
}
func GetTags() string {
return computedTags
}
func PrometheusUserAgent() string {
return ComponentUserAgent("Prometheus")
}
func ComponentUserAgent(component string) string {
return component + "/" + Version
}
func init() {
computedRevision, computedTags = computeRevision()
}
func computeRevision() (string, string) {
var (
rev = "unknown"
tags = "unknown"
modified bool
)
buildInfo, ok := debug.ReadBuildInfo()
if !ok {
return rev, tags
}
for _, v := range buildInfo.Settings {
if v.Key == "vcs.revision" {
rev = v.Value
}
if v.Key == "vcs.modified" {
if v.Value == "true" {
modified = true
}
}
if v.Key == "-tags" {
tags = v.Value
}
}
if modified {
return rev + "-modified", tags
}
return rev, tags
}