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Add the version package from `prometheus/common` to allow breaking the circular dependency between `prometheus/client_golang` and `prometheus/common`. * Remove support for Go older than 1.18. Related to: prometheus/common#58 Signed-off-by: SuperQ <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,152 @@ | ||
| // 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" | ||
|
|
||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
|
||
| // 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 | ||
| ) | ||
|
|
||
| var computedRevision string | ||
| var computedTags string | ||
|
|
||
| func getRevision() string { | ||
| if Revision != "" { | ||
| return Revision | ||
| } | ||
| return computedRevision | ||
| } | ||
|
|
||
| func getTags() string { | ||
| return computedTags | ||
| } | ||
|
|
||
| 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 | ||
| } | ||
|
|
||
| // NewCollector returns a collector that exports metrics about current version | ||
| // information. | ||
| func NewCollector(program string) prometheus.Collector { | ||
| return prometheus.NewGaugeFunc( | ||
| prometheus.GaugeOpts{ | ||
| Namespace: program, | ||
| Name: "build_info", | ||
| Help: fmt.Sprintf( | ||
| "A metric with a constant '1' value labeled by version, revision, branch, goversion from which %s was built, and the goos and goarch for the build.", | ||
| program, | ||
| ), | ||
| ConstLabels: prometheus.Labels{ | ||
| "version": Version, | ||
| "revision": getRevision(), | ||
| "branch": Branch, | ||
| "goversion": GoVersion, | ||
| "goos": GoOS, | ||
| "goarch": GoArch, | ||
| "tags": getTags(), | ||
| }, | ||
| }, | ||
| func() float64 { return 1 }, | ||
| ) | ||
| } | ||
|
|
||
| // 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()) | ||
| } | ||
|
|
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| // 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()) | ||
| } |