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// Copyright 2018 The Go 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 main
import (
exec "golang.org/x/sys/execabs"
"os"
"path/filepath"
"runtime"
"strings"
)
func findGOROOT() string {
if env := os.Getenv("GOROOT"); env != "" {
return filepath.Clean(env)
}
def := filepath.Clean(runtime.GOROOT())
if runtime.Compiler == "gccgo" {
// gccgo has no real GOROOT, and it certainly doesn't
// depend on the executable's location.
return def
}
out, err := exec.Command("go", "env", "GOROOT").Output()
if err != nil {
return def
}
return strings.TrimSpace(string(out))
}
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