xcodeprojにccache向けの設定を適用するサンプル

CcacheSettings.cs

#if UNITY_IOS
using System.IO;
using UnityEditor;
using UnityEditor.Callbacks;
using UnityEditor.iOS.Xcode;

namespace Samples
{
    static class CcacheSettings
    {
        /// <summary>
        /// xcodeprojにccache向けの設定を適用するサンプル
        /// </summary>
        [PostProcessBuild]
        public static void OnPostprocessBuild(BuildTarget buildTarget, string path)
        {
            if (buildTarget == BuildTarget.iOS)
            {
                var pbxProjectPath = PBXProject.GetPBXProjectPath(path);
                var pbxProject = new PBXProject();
                pbxProject.ReadFromString(File.ReadAllText(pbxProjectPath));

                // refered to:
                //     https://qiita.com/tani-shi/items/e1493e63a02966ef1bac
                var target = pbxProject.ProjectGuid();
                pbxProject.AddBuildProperty(target, "CC", "$(DT_TOOLCHAIN_DIR)/usr/bin/ccache_wrapper");
                pbxProject.SetBuildProperty(target, "LDPLUSPLUS", "$(DT_TOOLCHAIN_DIR)/usr/bin/clang++");

                File.WriteAllText(pbxProjectPath, pbxProject.WriteToString());
            }
        }
    }
}
#endif