シーンごとにビルド結果の容量を出す

using System;
using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;
using UnityEditor;
using UnityEngine;

public class BuildScenes {

  //出力先パス
  static string outputPath = @"C:/work/sandbox/buildAllScenes/";

  //メニューの BuildにBuild Scenesコマンドを追加
  [MenuItem("Build/Build Scenes")]
  public static void Build() {
    Debug.Log(outputPath);
    if (!Directory.Exists(outputPath)) {
      Directory.CreateDirectory(outputPath);
    }

    var scenes = GetScenes();
    BuildTarget target;
#if UNITY_EDITOR_WIN
    target = BuildTarget.StandaloneWindows;
#else
    target = BuildTarget.StandaloneOSXIntel;
#endif
    for (var i = 0; i < scenes.Length; i++) {
      var name = GetSceneName(scenes[i]);
      string errorMessage = BuildPipeline.BuildPlayer(
          new string[] { scenes[i] },
          outputPath + name + ".exe",    // 出力先
          target, // ビルド対象プラットフォーム
          BuildOptions.Development            // ビルドオプション
      );
      Debug.Log(i + ":build " + name);
      var log = AnalyzeLog();
      StreamWriter writer = new StreamWriter(outputPath + name + ".log");
      writer.WriteLine(log);
      writer.Close();
    }
  }

  //シーンのパスからシーン名だけを取得する
  static string GetSceneName(string path) {
    var a = path.LastIndexOf("/");
    var b = path.LastIndexOf(".");
    return path.Substring(a + 1, b - a - 1);
  }

  //ビルド対象のシーン一覧を取得する
  static string[] GetScenes() {
    List<string> sceneList = new List<string>();

    EditorBuildSettingsScene[] scenes = EditorBuildSettings.scenes;
    foreach (EditorBuildSettingsScene scene in scenes) {
      sceneList.Add(scene.path);
    }
    return sceneList.ToArray();
  }

  //ログファイルを解析し、容量部分だけを抽出する
  public static string AnalyzeLog() {
    string logPath;
#if UNITY_EDITOR_WIN
    logPath = @"C:\Users\" + Environment.UserName + @"\AppData\Local\Unity\Editor\Editor.log";
#else
    logPath = "~/Library/Logs/Unity/Editor.log";
#endif
    FileStream fs = new FileStream(logPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
    StreamReader sr = new StreamReader(fs);
    string text = sr.ReadToEnd();
    sr.Close();
    fs.Close();
    var matches = new Regex(@"Build Report\s[\s\S]*?-------------------").Matches(text);
    if (matches.Count <= 0) {
      Debug.LogError("No Log");
      return null;
    }
    return matches[matches.Count - 1].ToString();

  }

}