mirror of
https://github.com/tailscale/tailscale.git
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42 lines
1.0 KiB
Go
42 lines
1.0 KiB
Go
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// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package version
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import (
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"os"
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"path"
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"strings"
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"rsc.io/goversion/version"
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)
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// CmdName returns either the base name of the current binary
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// using os.Executable. If os.Executable fails (it sholdn't), then
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// "cmd" is returned.
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func CmdName() string {
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e, err := os.Executable()
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if err != nil {
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return "cmd"
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}
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var ret string
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v, err := version.ReadExe(e)
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if err != nil {
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ret = strings.TrimSuffix(strings.ToLower(e), ".exe")
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} else {
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// v is like:
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// "path\ttailscale.com/cmd/tailscale\nmod\ttailscale.com\t(devel)\t\ndep\tgithub.com/apenwarr/fixconsole\tv0.0.0-20191012055117-5a9f6489cc29\th1:muXWUcay7DDy1/hEQWrYlBy+g0EuwT70sBHg65SeUc4=\ndep\tgithub....
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for _, line := range strings.Split(v.ModuleInfo, "\n") {
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if strings.HasPrefix(line, "path\t") {
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ret = path.Base(strings.TrimPrefix(line, "path\t"))
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break
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}
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}
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}
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if ret == "" {
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return "cmd"
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}
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return ret
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}
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