[Auto compile scripts at background] Let Unity editor auto compile scripts in background if any of scripts has been modified #unity #editor #compile #building

ScriptFileWatcher.cs

#if UNITY_EDITOR

using System.IO;
using System.Threading;
using UnityEditor;
 
/// <summary>
/// use fswatch to monitor Scripts folder，start auto compile in background before Unity gets focused
/// for Mac users, use: 'brew install fswatch' to install fswatch
/// </summary>
[InitializeOnLoad]
public class ScriptFileWatcher
{
    public static string ScriptPath = "Assets/Scripts";
    public static bool SetRefresh;
 
    static ScriptFileWatcher()
    {
        ThreadPool.QueueUserWorkItem(MonitorDirectory, ScriptPath);
        EditorApplication.update += OnUpdate;
    }
 
    private static void FileSystemWatcher_Changed(object sender, FileSystemEventArgs e)
    {
        SetRefresh = true;
    }
 
    private static void MonitorDirectory(object obj)
    {
        string path = (string)obj;
 
        FileSystemWatcher fileSystemWatcher = new FileSystemWatcher();
        fileSystemWatcher.Path = path;
        fileSystemWatcher.IncludeSubdirectories = true;
        fileSystemWatcher.Changed += FileSystemWatcher_Changed;
        fileSystemWatcher.Created += FileSystemWatcher_Changed;
        fileSystemWatcher.Renamed += FileSystemWatcher_Changed;
        fileSystemWatcher.Deleted += FileSystemWatcher_Changed;
        fileSystemWatcher.EnableRaisingEvents = true;
    }
 
    private static void OnUpdate()
    {
        if (!SetRefresh) return;
 
        if (EditorApplication.isCompiling) return;
        if (EditorApplication.isUpdating) return;
 
        AssetDatabase.Refresh(ImportAssetOptions.ForceSynchronousImport & ImportAssetOptions.ForceUpdate);
        AssetDatabase.ImportAsset(ScriptPath, ImportAssetOptions.ForceSynchronousImport & ImportAssetOptions.ForceUpdate);
        SetRefresh = false;
    }
}

#endif