DEBUG, RELEASE, MASTERといったプリプロセッサを追加・切り替えするメニュー

DefineSymbolSwitcher.cs

using UnityEditor;
using UnityEngine;
using System;
using System.Collections.Generic;
using System.Linq;

//================================================================================
// class DefineSymbolSwitcher
//================================================================================
public static class DefineSymbolSwitcher
{
    //================================================================================
    // constant
    //================================================================================
    // 設定対象のBuildTargetGroupテーブル
    private static readonly BuildTargetGroup[]   _targetGroupTbl =
    {
        BuildTargetGroup.Standalone,
        BuildTargetGroup.Android,
        BuildTargetGroup.iOS,
        // ...
    };
    // ツールメニューのタイトル
    public const string     STR_MENU_TITLE      = "FW Tools/DefineSwitch/";
    // 現在選択中のプラットフォームグループを取得
    //private static BuildTargetGroup CurrentPlatform = EditorUserBuildSettings.selectedBuildTargetGroup;

    //--------------------------------------------------------------------------------
    // 共通定義
    //--------------------------------------------------------------------------------
    public const string     STR_FW_DEBUG    = "FW_DEBUG";
    public const string     STR_FW_RELEASE  = "FW_RELEASE";
    public const string     STR_FW_MASTER   = "FW_MASTER";

    //--------------------------------------------------------------------------------
    // FW_DEBUG
    //--------------------------------------------------------------------------------
    [MenuItem(STR_MENU_TITLE + "Framework/DEBUG")]
    public static void Add_FW_DEBUG()
    {
        foreach( var group in _targetGroupTbl )
        {
            deleteSymbol( group, STR_FW_RELEASE );
            deleteSymbol( group, STR_FW_MASTER );

            addSymbol( group, STR_FW_DEBUG );
        }
    }
    //--------------------------------------------------------------------------------
    // FW_RELEASE
    //--------------------------------------------------------------------------------
    [MenuItem(STR_MENU_TITLE + "Framework/RELEASE")]
    public static void Add_FW_RELEASE()
    {
        foreach( var group in _targetGroupTbl )
        {
            deleteSymbol( group, STR_FW_DEBUG );
            deleteSymbol( group, STR_FW_MASTER );

            addSymbol( group, STR_FW_RELEASE );
        }
    }
    //--------------------------------------------------------------------------------
    // FW_MASTER
    //--------------------------------------------------------------------------------
    [MenuItem(STR_MENU_TITLE + "Framework/MASTER")]
    public static void Add_FW_MASTER()
    {
        foreach( var group in _targetGroupTbl )
        {
            deleteSymbol( group, STR_FW_DEBUG );
            deleteSymbol( group, STR_FW_RELEASE );

            addSymbol( group, STR_FW_MASTER );
        }
    }

    //--------------------------------------------------------------------------------
    // 指定したシンボルを削除
    //--------------------------------------------------------------------------------
    private static void     deleteSymbol( BuildTargetGroup group, string str_target )
    {
        var sds_list = getSymbolList( group );
        if( sds_list.Contains( str_target ) ){
            sds_list.Remove( str_target );
            PlayerSettings.SetScriptingDefineSymbolsForGroup( group, string.Join(";", sds_list.ToArray()) );
        }
    }

    //--------------------------------------------------------------------------------
    // 指定したシンボルを追加
    //--------------------------------------------------------------------------------
    private static void     addSymbol( BuildTargetGroup group, string str_target )
    {
        var sds_list = getSymbolList( group );
        if( !sds_list.Contains( str_target ) ){
            sds_list.Insert( 0, str_target );
            PlayerSettings.SetScriptingDefineSymbolsForGroup( group, string.Join(";", sds_list.ToArray()) );
        }
    }

    //--------------------------------------------------------------------------------
    // シンボルをリストで取得
    //--------------------------------------------------------------------------------
    private static List<string>     getSymbolList( BuildTargetGroup group )
    {
        return PlayerSettings.GetScriptingDefineSymbolsForGroup( group ).Split( ';' ).Select( s => s.Trim() ).ToList();
    }
}