| 1 | // Copyright 2018 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package main |
| 6 | |
| 7 | import ( |
| 8 | exec "golang.org/x/sys/execabs" |
| 9 | "os" |
| 10 | "path/filepath" |
| 11 | "runtime" |
| 12 | "strings" |
| 13 | ) |
| 14 | |
| 15 | func findGOROOT() string { |
| 16 | if env := os.Getenv("GOROOT"); env != "" { |
| 17 | return filepath.Clean(env) |
| 18 | } |
| 19 | def := filepath.Clean(runtime.GOROOT()) |
| 20 | if runtime.Compiler == "gccgo" { |
| 21 | // gccgo has no real GOROOT, and it certainly doesn't |
| 22 | // depend on the executable's location. |
| 23 | return def |
| 24 | } |
| 25 | out, err := exec.Command("go", "env", "GOROOT").Output() |
| 26 | if err != nil { |
| 27 | return def |
| 28 | } |
| 29 | return strings.TrimSpace(string(out)) |
| 30 | } |
| 31 |