mim: add root package

doc.go

+// Copyright 2020 The go-lpc Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package mim holds code for the MIM DAQ.
+package mim // import "github.com/go-lpc/mim"
+
+import (
+	"fmt"
+	"runtime/debug"
+)
+
+// Version returns the version of mim and its checksum.
+// The returned values are only valid in binaries built with module support.
+func Version() (version, sum string) {
+	b, ok := debug.ReadBuildInfo()
+	if !ok {
+		return "", ""
+	}
+	return versionOf(b)
+}
+
+func versionOf(b *debug.BuildInfo) (version, sum string) {
+	if b == nil {
+		return "", ""
+	}
+
+	const root = "github.com/go-lpc/mim"
+	for _, m := range b.Deps {
+		if m.Path != root {
+			continue
+		}
+		if m.Replace != nil {
+			switch {
+			case m.Replace.Version != "" && m.Replace.Path != "":
+				return fmt.Sprintf("%s %s", m.Replace.Path, m.Replace.Version), m.Replace.Sum
+			case m.Replace.Version != "":
+				return m.Replace.Version, m.Replace.Sum
+			case m.Replace.Path != "":
+				return m.Replace.Path, m.Replace.Sum
+			default:
+				return m.Version + "*", ""
+			}
+		}
+		return m.Version, m.Sum
+	}
+	return "", ""
+}