uistyle.go RawHistoryFolder

1// Package uistyle hands embedded NeferGUI stylesheets to NeferGUI, which loads
2// styles only by file path.
3package uistyle
4
5import (
6	"errors"
7	"fmt"
8	"os"
9)
10
11// Write stores styles in a private (0600) temporary file named after pattern
12// (see os.CreateTemp) and returns its path and a remove function. NeferGUI
13// reads the file once when Run starts, so callers remove it when Run returns.
14// remove is safe to call more than once; a removal failure only leaves a small
15// file in the temporary directory and is not worth failing a capture over.
16func Write(styles, pattern string) (path string, remove func(), err error) {
17	f, err := os.CreateTemp("", pattern)
18	if err != nil {
19		return "", nil, fmt.Errorf("stylesheet: %w", err)
20	}
21	path = f.Name()
22	remove = func() { _ = os.Remove(path) }
23	if _, err := f.WriteString(styles); err != nil {
24		err = errors.Join(err, f.Close())
25		remove()
26		return "", nil, fmt.Errorf("stylesheet: %w", err)
27	}
28	if err := f.Close(); err != nil {
29		remove()
30		return "", nil, fmt.Errorf("stylesheet: %w", err)
31	}
32	return path, remove, nil
33}