const defaultEditor … const defaultShell … const windowsEditor … const windowsShell … type Editor … // NewDefaultEditor creates a struct Editor that uses the OS environment to // locate the editor program, looking at EDITOR environment variable to find // the proper command line. If the provided editor has no spaces, or no quotes, // it is treated as a bare command to be loaded. Otherwise, the string will // be passed to the user's shell for execution. func NewDefaultEditor(envs []string) Editor { … } func defaultEnvShell() []string { … } func defaultEnvEditor(envs []string) ([]string, bool) { … } // LaunchTempFile reads the provided stream into a temporary file in the given directory // and file prefix, and then invokes Launch with the path of that file. It will return // the contents of the file after launch, any errors that occur, and the path of the // temporary file so the caller can clean it up as needed. func (e Editor) LaunchTempFile(prefix, suffix string, r io.Reader) ([]byte, string, error) { … } func platformize(linux, windows string) string { … }