Hilbish/readline/editor_unix.go

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//go:build !windows && !plan9
package readline
import (
"os"
"os/exec"
)
const defaultEditor = "vi"
// StartEditorWithBuffer - Enables a consumer of this console application to
// open an arbitrary buffer into the system editor. Currently only implemnted
// on *Nix systems. The modified buffer is returned when the editor quits, and
// depending on the actions taken by the user within it (eg: x or q! in Vim)
// The filename parameter can be used to pass a specific filename.ext pattern,
// which might be useful if the editor has builtin filetype plugin functionality.
func (rl *Instance) StartEditorWithBuffer(multiline []rune, filename string) ([]rune, error) {
name, err := rl.writeTempFile([]byte(string(multiline)), filename)
if err != nil {
return multiline, err
}
editor := os.Getenv("EDITOR")
// default editor if $EDITOR not set
if editor == "" {
editor = defaultEditor
}
cmd := exec.Command(editor, name)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Start(); err != nil {
return multiline, err
}
if err := cmd.Wait(); err != nil {
return multiline, err
}
b, err := readTempFile(name)
return []rune(string(b)), err
}