mirror of
https://github.com/tailscale/tailscale.git
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2072dcc127
f81233524f changed a use of package 'path' to 'filepath'.
Restore it back to 'path', with a comment.
Also, use the os.Executable-based fallback name in the case where the
binary itself doesn't have Go module information. That was overlooked in
the original code.
50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
// 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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// +build !darwin !arm64
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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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"path/filepath"
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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 shouldn'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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// fallbackName, the lowercase basename of the executable, is what we return if
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// we can't find the Go module metadata embedded in the file.
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fallbackName := filepath.Base(strings.TrimSuffix(strings.ToLower(e), ".exe"))
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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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return fallbackName
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}
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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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goPkg := strings.TrimPrefix(line, "path\t") // like "tailscale.com/cmd/tailscale"
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ret = path.Base(goPkg) // goPkg is always forward slashes; use path, not filepath
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break
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}
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}
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if ret == "" {
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return fallbackName
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}
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return ret
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}
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