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|
package cmd
import (
"errors"
"fmt"
"os"
"os/exec"
"strings"
"github.com/lxc/incus/v6/shared/revert"
)
// TextEditor spawns the editor with a temporary YAML file for editing configs.
func TextEditor(inPath string, inContent []byte) ([]byte, error) {
var f *os.File
var err error
var path string
// Detect the text editor to use
editor := os.Getenv("VISUAL")
if editor == "" {
editor = os.Getenv("EDITOR")
if editor == "" {
for _, p := range []string{"editor", "vi", "emacs", "nano"} {
_, err := exec.LookPath(p)
if err == nil {
editor = p
break
}
}
if editor == "" {
return []byte{}, errors.New("No text editor found, please set the EDITOR environment variable")
}
}
}
if inPath == "" {
// If provided input, create a new file
f, err = os.CreateTemp("", "editor_")
if err != nil {
return []byte{}, err
}
reverter := revert.New()
defer reverter.Fail()
reverter.Add(func() {
_ = f.Close()
_ = os.Remove(f.Name())
})
err = os.Chmod(f.Name(), 0o600)
if err != nil {
return []byte{}, err
}
_, err = f.Write(inContent)
if err != nil {
return []byte{}, err
}
err = f.Close()
if err != nil {
return []byte{}, err
}
path = fmt.Sprintf("%s.yaml", f.Name())
err = os.Rename(f.Name(), path)
if err != nil {
return []byte{}, err
}
reverter.Success()
reverter.Add(func() { _ = os.Remove(path) })
} else {
path = inPath
}
cmdParts := strings.Fields(editor)
cmd := exec.Command(cmdParts[0], append(cmdParts[1:], path)...)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err = cmd.Run()
if err != nil {
return []byte{}, err
}
content, err := os.ReadFile(path)
if err != nil {
return []byte{}, err
}
return content, nil
}
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