code that works

pkg/editor/editor.go

@@ -0,0 +1,70 @@
+package editor
+
+import (
+	"errors"
+	"io/fs"
+	"os"
+	"os/exec"
+
+	"git.burning.moe/celediel/agedit/pkg/tmpfile"
+)
+
+// EditFile opens the specified file in the configured editor
+func EditFile(editor, filename string) error {
+	if editor == "" {
+		return errors.New("editor not set")
+	}
+
+	// TODO: handle editors that require arguments
+	cmd := exec.Command(editor, filename)
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	if err := cmd.Run(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// EditTempFile creates a temporary file with a random name, opens it in the
+// editor, and returns the byte slice of its contents.
+func EditTempFile(editor, start, prefix, suffix string, filename_length int) ([]byte, error) {
+	var (
+		filename string
+		bytes    []byte
+		err      error
+		file     *os.File
+	)
+
+	// generator := tmpfile.NewGenerator("agedit_", ".txt", 13)
+	generator := tmpfile.NewGenerator(prefix, suffix, filename_length)
+
+	filename = generator.GenerateFullPath()
+	if file, err = os.Create(filename); err != nil {
+		return nil, err
+	}
+
+	if err = os.WriteFile(filename, []byte(start), fs.FileMode(0600)); err != nil {
+		return nil, err
+	}
+
+	if err = EditFile(editor, filename); err != nil {
+		return nil, err
+	}
+
+	if bytes, err = os.ReadFile(filename); err != nil {
+		return nil, err
+	}
+
+	if err = file.Close(); err != nil {
+		return nil, err
+	}
+
+	if err = os.Remove(filename); err != nil {
+		return nil, err
+	}
+
+	return bytes, nil
+}