Function LookPathGopath

internal/osutil/paths.go:448–465

LookPathGopath uses exec.LookPath to find binName, and then falls back to looking in $GOPATH/bin.

(binName string)

// LookPathGopath uses exec.LookPath to find binName, and then falls back to
// looking in $GOPATH/bin.
func LookPathGopath(binName string) (string, error) {
	binPath, err := exec.LookPath(binName)
	if err == nil {
		return binPath, nil
	}
	binDir, err := goPathBinDir()
	if err != nil {
		return "", fmt.Errorf("command %q not found in $PATH, and could not look in $GOPATH/bin because %v", binName, err)
	}
	binPath = filepath.Join(binDir, binName)
	if runtime.GOOS == "windows" {
		binPath += ".exe"
	}
	if _, err := os.Stat(binPath); err != nil {
		return "", err
	}
	return binPath, nil
}