watcher.go

// Copyright (C) 2025 Intel Corporation

// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License version 2 or later, as published
// by the Free Software Foundation.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program; if not, see <http://www.gnu.org/licenses/>.

// SPDX-License-Identifier: GPL-2.0-or-later

package main

import (
	"os"
	"os/signal"

	"log/slog"

	"github.com/fsnotify/fsnotify"
)

func newFSWatcher(files ...string) (*fsnotify.Watcher, error) {
	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		return nil, err
	}

	for _, f := range files {
		err = watcher.Add(f)
		if err != nil {
			close_err := watcher.Close()
			if close_err != nil {
				slog.Error("Failed to close watcher after error", "error", close_err, "file", f)
			}

			return nil, err
		}
	}

	return watcher, nil
}

func newOSWatcher(sigs ...os.Signal) chan os.Signal {
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, sigs...)

	return sigChan
}