chore: refresh gramsrv public release

cmd/telesrv/buildinfo.go

@@ -0,0 +1,54 @@
+package main
+
+import "runtime/debug"
+
+var (
+	gitCommit    = ""
+	gitBranch    = ""
+	gitTreeState = ""
+	buildTime    = ""
+)
+
+type buildMetadata struct {
+	Commit    string
+	Branch    string
+	TreeState string
+	BuildTime string
+	GoVersion string
+}
+
+func currentBuildMetadata() buildMetadata {
+	meta := buildMetadata{
+		Commit:    valueOrUnknown(gitCommit),
+		Branch:    valueOrUnknown(gitBranch),
+		TreeState: valueOrUnknown(gitTreeState),
+		BuildTime: valueOrUnknown(buildTime),
+	}
+	if info, ok := debug.ReadBuildInfo(); ok {
+		meta.GoVersion = info.GoVersion
+		settings := map[string]string{}
+		for _, setting := range info.Settings {
+			settings[setting.Key] = setting.Value
+		}
+		if meta.Commit == "unknown" {
+			meta.Commit = valueOrUnknown(settings["vcs.revision"])
+		}
+		if meta.TreeState == "unknown" {
+			switch settings["vcs.modified"] {
+			case "true":
+				meta.TreeState = "dirty"
+			case "false":
+				meta.TreeState = "clean"
+			}
+		}
+	}
+	meta.GoVersion = valueOrUnknown(meta.GoVersion)
+	return meta
+}
+
+func valueOrUnknown(v string) string {
+	if v == "" {
+		return "unknown"
+	}
+	return v
+}