initial commit

internal/version/version.go

@@ -0,0 +1,62 @@
+// Package version carries build identification for the binary.
+package version
+
+import (
+	"fmt"
+	"runtime"
+	"runtime/debug"
+)
+
+// These are overridable at build time with -ldflags.
+var (
+	Version   = "0.1.0"
+	Commit    = ""
+	BuildDate = ""
+)
+
+// Name is the product name shown in the UI and on the CLI.
+const Name = "VibeDNS"
+
+func init() {
+	if Commit != "" {
+		return
+	}
+	info, ok := debug.ReadBuildInfo()
+	if !ok {
+		return
+	}
+	for _, s := range info.Settings {
+		switch s.Key {
+		case "vcs.revision":
+			if len(s.Value) > 12 {
+				Commit = s.Value[:12]
+			} else {
+				Commit = s.Value
+			}
+		case "vcs.time":
+			if BuildDate == "" {
+				BuildDate = s.Value
+			}
+		}
+	}
+}
+
+// Short returns just the semantic version.
+func Short() string { return Version }
+
+// Long returns a multi-line description suitable for `vibedns version`.
+func Long() string {
+	s := fmt.Sprintf("%s %s\n", Name, Version)
+	if Commit != "" {
+		s += fmt.Sprintf("commit:  %s\n", Commit)
+	}
+	if BuildDate != "" {
+		s += fmt.Sprintf("built:   %s\n", BuildDate)
+	}
+	s += fmt.Sprintf("go:      %s\n", runtime.Version())
+	s += fmt.Sprintf("platform: %s/%s\n", runtime.GOOS, runtime.GOARCH)
+	return s
+}
+
+// UserAgent identifies the server in outbound HTTP requests.
+func UserAgent() string { return Name + "/" + Version }