Merge pull request #163 from Unity-Technologies/zgh/build_scripts

Zgh/build scripts

engine/Build.bee.cs

 using Bee.Toolchain.GNU;
 using Bee.Toolchain.IOS;
 using System.Diagnostics;
-
+using System.IO;
 enum UIWidgetsBuildTargetPlatform
 {
     windows,
     //bee.exe win
     static void DeployWindows()
     {
-        var libUIWidgets = SetupLibUIWidgets(UIWidgetsBuildTargetPlatform.windows, out var dependencies);
+        var libUIWidgets = SetupLibUIWidgets(UIWidgetsBuildTargetPlatform.windows, out var dependencies_debug, out var dependencies_release);
 
         var builder = new VisualStudioNativeProjectFileBuilder(libUIWidgets);
         builder = libUIWidgets.SetupConfigurations.Aggregate(
         sln.Projects.Add(deployed);
         Backend.Current.AddAliasDependency("ProjectFiles", sln.Setup());
 
-        Backend.Current.AddAliasDependency("win", deployed.Path);
-        foreach (var dep in dependencies)
+        Backend.Current.AddAliasDependency("win_debug", deployed.Path);
+        foreach (var dep in dependencies_debug)
-            Backend.Current.AddAliasDependency("win", dep);
+            Backend.Current.AddAliasDependency("win_debug", dep);
+        }
+        foreach (var dep in dependencies_release)
+        {
+            Backend.Current.AddAliasDependency("win_release", dep);
         }
     }
 
-        var libUIWidgets = SetupLibUIWidgets(UIWidgetsBuildTargetPlatform.android, out var dependencies);
+        var libUIWidgets = SetupLibUIWidgets(UIWidgetsBuildTargetPlatform.android, out var dependencies_debug, out var dependencies_release);
-        foreach (var dep in dependencies)
+        foreach (var dep in dependencies_debug)
-            Backend.Current.AddAliasDependency("android", dep);
+            Backend.Current.AddAliasDependency("android_debug", dep);
+        }
+        foreach (var dep in dependencies_release)
+        {
+            Backend.Current.AddAliasDependency("android_release", dep);
-        var libUIWidgets = SetupLibUIWidgets(UIWidgetsBuildTargetPlatform.mac, out var dependencies);
+        var libUIWidgets = SetupLibUIWidgets(UIWidgetsBuildTargetPlatform.mac, out var dependencies_debug, out var dependencies_release);
-        Backend.Current.AddAliasDependency("mac", new NPath("libUIWidgetsMac.xcodeproj/project.pbxproj"));
-        foreach (var dep in dependencies)
+        Backend.Current.AddAliasDependency("mac_debug", new NPath("libUIWidgetsMac.xcodeproj/project.pbxproj"));
+        foreach (var dep in dependencies_debug)
-            Backend.Current.AddAliasDependency("mac", dep);
+            Backend.Current.AddAliasDependency("mac_debug", dep);
+        }
+        foreach (var dep in dependencies_release)
+        {
+            Backend.Current.AddAliasDependency("mac_release", dep);
         }
     }
 
-        var libUIWidgets = SetupLibUIWidgets(UIWidgetsBuildTargetPlatform.ios, out var dependencies);
+        var libUIWidgets = SetupLibUIWidgets(UIWidgetsBuildTargetPlatform.ios, out var dependencies_debug, out var dependencies_release);
-        Backend.Current.AddAliasDependency("ios",  new NPath("libUIWidgetsIOS.xcodeproj/project.pbxproj"));
-        foreach(var dep in dependencies) {
-            Backend.Current.AddAliasDependency("ios", dep);
+        Backend.Current.AddAliasDependency("ios_debug",  new NPath("libUIWidgetsIOS.xcodeproj/project.pbxproj"));
+        foreach(var dep in dependencies_debug) {
+            Backend.Current.AddAliasDependency("ios_debug", dep);
+        }
+        foreach(var dep in dependencies_release) {
+            Backend.Current.AddAliasDependency("ios_release", dep);
-        flutterRoot = Environment.GetEnvironmentVariable("FLUTTER_ROOT");
+        flutterRoot = Environment.GetEnvironmentVariable("FLUTTER_ROOT_PATH");
         if (string.IsNullOrEmpty(flutterRoot))
         {
             flutterRoot = Environment.GetEnvironmentVariable("USERPROFILE") + "/engine/src";
+         try
+        {
+            if(File.Exists("Scripts/bitcode.conf"))
+            {
+                using (StreamReader sr = new StreamReader("Scripts/bitcode.conf"))
+                {
+                    string line;
+                    if ((line = sr.ReadLine()) != null)
+                    {
+                        if(line.Trim() == "true")
+                        {
+                            ios_bitcode_enabled = true;
+                        }
+                        else
+                        {
+                            ios_bitcode_enabled = false;
+                        }
+                    }
+                }
+            }
+            else
+            {
+                ios_bitcode_enabled = false;
+            }
+        }
+        catch (Exception e)
+        {
+            Console.WriteLine(e.Message);
+        }
+
+
+
         //available target platforms of Windows
         if (BuildUtils.IsHostWindows())
         {
     //refer to the readme file for the details
     private static bool ios_bitcode_enabled = false;
 
-    static NativeProgram SetupLibUIWidgets(UIWidgetsBuildTargetPlatform platform, out List<NPath> dependencies)
+    static NativeProgram SetupLibUIWidgets(UIWidgetsBuildTargetPlatform platform, out List<NPath> dependencies_debug, out List<NPath> dependencies_release)
     {
         var np = new NativeProgram("libUIWidgets")
         {
         //SetupFml(np);
         //SetupSkia(np);
         //SetupTxt(np);
-        var codegens = new[] { CodeGen.Debug };
-        dependencies = new List<NPath>();
-
+        var codegens = new[] { CodeGen.Debug, CodeGen.Release };
+        dependencies_debug = new List<NPath>();
+        dependencies_release = new List<NPath>();
         if (platform == UIWidgetsBuildTargetPlatform.windows)
         {
             var toolchain = ToolChain.Store.Windows().VS2019().Sdk_17134().x64();
                 var config = new NativeProgramConfiguration(codegen, toolchain, lump: true);
 
-                var builtNP = np.SetupSpecificConfiguration(config, toolchain.DynamicLibraryFormat)
-                    .DeployTo("build");
-
-                dependencies.Add(builtNP.Path);
-                builtNP.DeployTo("../com.unity.uiwidgets/Runtime/Plugins/x86_64");
+            
+                if(codegen == CodeGen.Debug)
+                {
+                    var builtNP = np.SetupSpecificConfiguration(config, toolchain.DynamicLibraryFormat)
+                    .DeployTo("build_debug");
+                    dependencies_debug.Add(builtNP.Path);
+                }
+                else if(codegen == CodeGen.Release)
+                {
+                    var builtNP = np.SetupSpecificConfiguration(config, toolchain.DynamicLibraryFormat)
+                    .DeployTo("build_release");
+                    dependencies_release.Add(builtNP.Path);
+                }
+                
             }
         }
         else if (platform == UIWidgetsBuildTargetPlatform.android)
                 var config = new NativeProgramConfiguration(codegen, androidToolchain, lump: true);
                 validConfigurations.Add(config);
 
-                var buildNP = np.SetupSpecificConfiguration(config, androidToolchain.DynamicLibraryFormat).DeployTo("build");
-
-                var deoployNp = buildNP.DeployTo("../com.unity.uiwidgets/Runtime/Plugins/Android");
-                dependencies.Add(buildNP.Path);
-                dependencies.Add(deoployNp.Path);
+                
+                if(codegen == CodeGen.Debug)
+                {
+                    var buildNP = np.SetupSpecificConfiguration(config, androidToolchain.DynamicLibraryFormat).DeployTo("build_debug");
+                    dependencies_debug.Add(buildNP.Path);
+                }
+                else if(codegen == CodeGen.Release)
+                {
+                    var buildNP = np.SetupSpecificConfiguration(config, androidToolchain.DynamicLibraryFormat).DeployTo("build_release");
+                    dependencies_release.Add(buildNP.Path);
+                }
+                
             }
             np.ValidConfigurations = validConfigurations;
         }
                 validConfigurations.Add(config);
 
                 var buildProgram = np.SetupSpecificConfiguration(config, toolchain.DynamicLibraryFormat);
-                var buildNp = buildProgram.DeployTo("build");
-                var deployNp = buildProgram.DeployTo("../com.unity.uiwidgets/Runtime/Plugins/osx");
-                dependencies.Add(buildNp.Path);
-                dependencies.Add(deployNp.Path);
+                
+                if(codegen == CodeGen.Debug)
+                {
+                    var buildNp = buildProgram.DeployTo("build_debug");
+                    dependencies_debug.Add(buildNp.Path);
+                }
+                else if(codegen == CodeGen.Release)
+                {
+                    var buildNp = buildProgram.DeployTo("build_release");
+                    dependencies_release.Add(buildNp.Path);
+                }
             }
             np.ValidConfigurations = validConfigurations;
 
                 var config = new NativeProgramConfiguration(codegen, toolchain, lump: true);
                 validConfigurations.Add(config);
                 var buildProgram = np.SetupSpecificConfiguration(config, toolchain.StaticLibraryFormat);
-                var builtNP = buildProgram.DeployTo("build");
-                var deployNP = buildProgram.DeployTo("../com.unity.uiwidgets/Runtime/Plugins/iOS/");
-                dependencies.Add(builtNP.Path);
-                dependencies.Add(deployNP.Path);
+                
+                if(codegen == CodeGen.Debug)
+                {
+                    var builtNP = buildProgram.DeployTo("build_debug");
+                    dependencies_debug.Add(builtNP.Path);
+                }
+                else if(codegen == CodeGen.Release)
+                {
+                    var builtNP = buildProgram.DeployTo("build_release");
+                    dependencies_release.Add(builtNP.Path);
+                }
             }
 
             np.ValidConfigurations = validConfigurations;

engine/Scripts/patches/BUILD.gn.patch

+--- a/third_party/txt/BUILD.gn
++++ b/third_party/txt/BUILD.gn
+@@ -141,6 +141,7 @@
+     "//third_party/harfbuzz",
+     "//third_party/icu",
+     "//third_party/skia",
++    "//third_party/skia/modules/skottie",
+   ]
+ 
+   deps = [
+@@ -339,3 +340,10 @@
+     deps += [ "//third_party/skia/modules/skparagraph" ]
+   }
+ }
++
++static_library("txt_lib") {
++  complete_static_lib = true
++  deps = [
++    ":txt",
++  ]
++}

engine/Scripts/patches/find_sdk.patch

+diff --git a/Users/unity/Documents/GitHub/EngineBuildTool/engine/src/build/mac/find_sdk.py b/Users/unity/Desktop/find_sdk.py
+index 0534766..e503ced 100755
+--- a/Users/unity/Documents/GitHub/EngineBuildTool/engine/src/build/mac/find_sdk.py
++++ b/Users/unity/Desktop/find_sdk.py
+@@ -55,7 +55,7 @@ def main():
+     sdk_dir = xcode43_sdk_path
+   else:
+     sdk_dir = os.path.join(out.rstrip(), 'SDKs')
+-  sdks = [re.findall('^MacOSX(10\.\d+)\.sdk$', s) for s in os.listdir(sdk_dir)]
++  sdks = [re.findall('^MacOSX(1[0-1]\.\d+)\.sdk$', s) for s in os.listdir(sdk_dir)]
+   sdks = [s[0] for s in sdks if s]  # [['10.5'], ['10.6']] => ['10.5', '10.6']
+   sdks = [s for s in sdks  # ['10.5', '10.6'] => ['10.6']
+           if parse_version(s) >= parse_version(min_sdk_version)]

engine/Scripts/patches/windows/BUILD.gn.patch

+--- E:\EngineBuildTool\engine\src\third_party\angle\BUILD.gn	2021-05-20 11:40:00 +0800
++++ E:\EngineBuildTool\engine\src\third_party\angle\modify\BUILD.gn	2021-05-20 14:02:00 +0800
+@@ -1252,3 +1252,17 @@
+     ]
+   }
+ }
++angle_static_library("angle_lib"){
++  complete_static_lib = true
++
++  deps = [
++    ":libANGLE",
++    ":libANGLE_base",
++    ":angle_system_utils",
++    ":angle_version",
++  ]
++
++  public_deps = [
++    ":includes",
++  ]
++}

engine/Scripts/patches/windows/BUILD_2.gn.patch

+--- e:\EngineBuildTool\engine\src\third_party\skia\BUILD.gn	2021-05-20 15:48:51 +0800
++++ e:\EngineBuildTool\engine\src\third_party\skia\modify\BUILD.gn	2021-05-20 16:08:53 +0800
+@@ -524,6 +524,7 @@
+ 
+   if (skia_use_gl) {
+     public_defines += [ "SK_GL" ]
++    include_dirs = [ "//third_party/angle/include" ]
+     if (is_android) {
+       sources += [ "src/gpu/gl/egl/GrGLMakeNativeInterface_egl.cpp" ]
+ 

engine/Scripts/patches/windows/cpp.patch

+--- E:\EngineBuildTool\engine\src\third_party\angle\src\libANGLE\renderer\d3d\d3d11\ExternalImageSiblingImpl11.cpp	2021-05-20 11:40:01 +0800
++++ E:\EngineBuildTool\engine\src\third_party\angle\src\libANGLE\renderer\d3d\d3d11\modify\ExternalImageSiblingImpl11.cpp	2021-05-20 14:48:30 +0800
+@@ -144,7 +144,7 @@
+ 
+     mRenderTarget = std::make_unique<TextureRenderTarget11>(
+         std::move(rtv), mTexture, std::move(srv), std::move(blitSrv), formatInfo.internalFormat,
+-        formatInfo, mSize.width, mSize.height, 1, 1);
++        formatInfo, mSize.width, mSize.height, 1, mSamples);
+     return angle::Result::Continue;
+ }
+ 

engine/Scripts/patches/android/BUILD.gn.patch

+--- /Users/unity/Documents/GitHub/EngineBuildTool/engine/src/flutter/third_party/txt/BUILD.gn	2021-05-19 11:45:24.000000000 +0800
++++ /Users/unity/Documents/GitHub/EngineBuildTool/engine/src/flutter/third_party/txt/modify/BUILD.gn	2021-05-19 11:44:06.000000000 +0800
+@@ -141,6 +141,9 @@
+     "//third_party/harfbuzz",
+     "//third_party/icu",
+     "//third_party/skia",
++    "//third_party/skia/modules/skottie",
++    "//third_party/libcxx",
++    "//third_party/libcxxabi",
+   ]
+ 
+   deps = [
+@@ -339,3 +342,10 @@
+     deps += [ "//third_party/skia/modules/skparagraph" ]
+   }
+ }
++
++static_library("txt_lib") {
++  complete_static_lib = true
++  deps = [
++    ":txt",
++  ]
++}

engine/Scripts/patches/android/BUILD_2.gn.patch

+--- /Users/unity/Documents/GitHub/EngineBuildTool/engine/src/build/secondary/third_party/libcxxabi/BUILD.gn	2021-05-19 10:57:31.000000000 +0800
++++ /Users/unity/Documents/GitHub/EngineBuildTool/engine/src/build/secondary/third_party/libcxxabi/modify/BUILD.gn	2021-05-19 11:53:06.000000000 +0800
+@@ -7,7 +7,6 @@
+ }
+ 
+ source_set("libcxxabi") {
+-  visibility = [ "../libcxx:*" ]
+ 
+   sources = [
+     "src/abort_message.cpp",

engine/Scripts/lib_build.py

+from genericpath import exists
+from pathlib import Path
+import os
+import sys
+import getopt
+import shutil
+import json
+
+work_path=os.getcwd()
+engine_path=""
+platform=""
+gn_params=""
+optimize=""
+ninja_params=""
+ninja_params1=""
+ninja_params2=""
+ninja_params3=""
+runtime_mode=""
+bitcode=""
+flutter_root_path=""
+visual_studio_path=""
+
+def get_opts():
+    # get intput agrs
+    global engine_path
+    global gn_params
+    global runtime_mode
+    global bitcode
+    global visual_studio_path
+    global platform
+
+    if len(sys.argv) < 2:
+        show_help()
+        sys.exit()
+    options, args = getopt.getopt(sys.argv[1:], 'r:p:m:v:eh',["help"])
+    for opt, arg in options:
+        if opt == '-r':
+            engine_path = arg # set engine_path, depot_tools and flutter engine folder will be put into this path
+        elif opt == '-p':
+            platform = arg
+            if platform == "android" or platform == "ios":
+                gn_params +=  " --" + arg # set the target platform android/ios
+        elif opt == '-m':
+            runtime_mode = arg
+            gn_params +=  " --runtime-mode=" + runtime_mode # set runtime mode release/debug
+        elif opt == '-v':
+            visual_studio_path = arg
+        elif opt == '-e':
+            bitcode="-bitcode_bundle -bitcode_verify"
+        elif opt in ("-h","--help"):
+            show_help()
+            sys.exit()
+    if platform == "ios" and bitcode == "-bitcode_bundle -bitcode_verify":
+        gn_params += " --bitcode" # enable-bitcode switch
+        
+def engine_path_check():
+    global engine_path
+    if not os.path.exists(engine_path):
+        os.makedirs(engine_path)
+
+def bitcode_conf():
+    global platform
+    global bitcode
+
+    if platform == "ios": 
+        f = open("bitcode.conf",'w')
+        if bitcode == "-bitcode_bundle -bitcode_verify":
+            f.write("true")
+        else:
+            f.write("false")
+        f.close()
+
+
+def set_params():
+    global output_path
+    global ninja_params
+    global ninja_params1
+    global ninja_params2
+    global ninja_params3
+    global gn_params
+    global visual_studio_path
+    global platform
+    global optimize
+
+    print("setting environment variable and other params...")
+    if platform == "windows":
+        visual_studio_path_env = os.getenv('GYP_MSVS_OVERRIDE_PATH', 'null')
+        if visual_studio_path == "":
+            if visual_studio_path_env == 'null':
+                assert False, "In func set_params(), visual_studio_path is not exist, please set the path by using \"-v\" param to set a engine path."
+        else:
+            os.environ["GYP_MSVS_OVERRIDE_PATH"] = visual_studio_path
+            
+    if runtime_mode == "release" and (platform == "mac" or platform == "windows"):
+        optimize=""
+        output_path="host_release"
+        ninja_params1=" -C out/" +output_path + " flutter/third_party/txt:txt_lib"
+        ninja_params2=" -C out/" +output_path + " third_party/angle:angle_lib"
+        ninja_params3=" -C out/" +output_path + " third_party/angle:libEGL_static"
+    elif runtime_mode == "debug" and (platform == "mac" or platform == "windows"):
+        optimize="--unoptimized"
+        output_path="host_debug_unopt"
+        ninja_params1=" -C out/" +output_path + " flutter/third_party/txt:txt_lib"
+        ninja_params2=" -C out/" +output_path + " third_party/angle:angle_lib"
+        ninja_params3=" -C out/" +output_path + " third_party/angle:libEGL_static"
+    elif runtime_mode == "release" and platform == "android":
+        optimize=""
+        output_path="android_release"
+    elif runtime_mode == "debug" and platform == "android":
+        optimize="--unoptimized"
+        output_path="android_debug_unopt"
+    elif runtime_mode == "release" and platform == "ios":
+        optimize=""
+        output_path="ios_release"
+    elif runtime_mode == "debug" and platform == "ios":
+        optimize="--unoptimized"
+        output_path="ios_debug_unopt"
+    else:
+        assert False, "In func set_params(), unknown param"
+
+    ninja_params=" -C out/" + output_path + " flutter/third_party/txt:txt_lib"
+    gn_params=gn_params + " " + optimize
+
+def set_env_verb():
+    global flutter_root_path
+    flutter_root_path = os.getenv('FLUTTER_ROOT_PATH', 'null')
+    if flutter_root_path == 'null':
+        os.environ["FLUTTER_ROOT_PATH"] = engine_path + "/engine/src"
+        flutter_root_path = os.getenv('FLUTTER_ROOT_PATH')
+    else:
+        print("This environment variable has been set, skip")
+    env_path = os.getenv('PATH')
+    path_strings = env_path.split(';')
+    for path in path_strings:
+        if path.startswith(engine_path):
+            print("This environment variable has been set, skip")
+            return
+    os.environ["PATH"] = engine_path + "/depot_tools;" + os.environ["PATH"]
+
+def get_depot_tools():
+    print("\nGetting Depot Tools...")
+    if not os.path.exists(engine_path):
+        assert False,"Flutter engine path is not exist, please set the path by using \"-r\" param to set a engine path."
+    if os.path.exists(Path(engine_path + "/depot_tools")) and os.path.exists(Path(engine_path + "/depot_tools/.git")):
+        print("depot_tools already installed, skip")
+    else:
+        os.chdir(engine_path)
+        os.system("git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git")
+        os.system("gclient")
+
+def get_flutter_engine():
+    global engine_path
+    global flutter_root_path
+    print("\nGetting flutter engine...")
+    if not os.path.exists(Path(engine_path + "/engine")):
+        os.makedirs(Path(engine_path + "/engine"))
+
+    content = '''
+solutions = [
+{
+    "managed": False,
+    "name": "src/flutter",
+    "url": "git@github.com:flutter/engine.git", 
+    "custom_deps": {},
+    "deps_file": "DEPS",
+    "safesync_url": "",
+},
+]
+'''
+    f = open(Path(engine_path + "/engine/.gclient"), "w")
+    f.write(content)
+    f.close()
+    os.chdir(Path(engine_path + "/engine"))
+    os.system("gclient sync")
+    os.chdir(Path(flutter_root_path + "/flutter"))
+    os.system("git checkout flutter-1.17-candidate.5")
+    os.system("gclient sync -D")
+
+def compile_engine():
+    global flutter_root_path
+    global work_path
+    global gn_params
+    global output_path
+    global ninja_params1
+    global ninja_params2
+    global ninja_params3
+    global platform
+
+    print("\nSCompiling engine...")
+
+    if platform == "ios" or platform == "mac":
+        os.chdir(Path(flutter_root_path + "/flutter/third_party/txt"))
+        copy_file(Path(work_path + "/patches/BUILD.gn.patch"), Path(flutter_root_path + "/flutter/third_party/txt"))
+        os.system("patch < BUILD.gn.patch -N")
+
+        os.chdir(Path(flutter_root_path + "/build/mac"))
+        copy_file(Path(work_path + "/patches/find_sdk.patch"), Path(flutter_root_path + "/build/mac"))
+        os.system("patch < find_sdk.patch -N")
+    elif platform == "android":
+        os.chdir(Path(flutter_root_path + "/flutter/third_party/txt"))
+        copy_file(Path(work_path + "/patches/android/BUILD.gn.patch"), Path(flutter_root_path + "/flutter/third_party/txt"))
+        os.system("patch < BUILD.gn.patch -N")
+        
+        os.chdir(Path(flutter_root_path + "/build/mac"))
+        copy_file(Path(work_path + "/patches/find_sdk.patch"), Path(flutter_root_path + "/build/mac"))
+        os.system("patch < find_sdk.patch -N")
+
+        os.chdir(Path(flutter_root_path + "/build/secondary/third_party/libcxxabi"))
+        copy_file(Path(work_path + "/patches/android/BUILD_2.gn.patch"), Path(flutter_root_path + "/build/secondary/third_party/libcxxabi"))
+        os.system("patch < BUILD_2.gn.patch -N")
+    elif platform == "windows":
+        os.chdir(Path(flutter_root_path + "/flutter/third_party/txt"))
+        copy_file(Path(work_path + "/patches/BUILD.gn.patch"), Path(flutter_root_path + "/flutter/third_party/txt"))
+        os.system("patch < BUILD.gn.patch -N")
+
+        os.chdir(Path(flutter_root_path + "/third_party/angle"))
+        copy_file(Path(work_path + "/patches/windows/BUILD.gn.patch"), Path(flutter_root_path + "/third_party/angle"))
+        os.system("patch < BUILD.gn.patch -N")
+
+        os.chdir(Path(flutter_root_path + "/third_party/angle/src/libANGLE/renderer/d3d/d3d11/"))
+        copy_file(Path(work_path + "/patches/windows/cpp.patch"), Path(flutter_root_path + "/third_party/angle/src/libANGLE/renderer/d3d/d3d11"))
+        os.system("patch < cpp.patch -N")
+
+        os.chdir(Path(flutter_root_path + "/third_party/skia/"))
+        copy_file(Path(work_path + "/patches/windows/BUILD_2.gn.patch"), Path(flutter_root_path + "/third_party/skia"))
+        os.system("patch < BUILD_2.gn.patch -N")
+
+    os.chdir(Path(flutter_root_path))
+    os.system("python ./flutter/tools/gn " + gn_params)
+
+    if platform == "mac":
+        f = open(Path(flutter_root_path + "/out/" + output_path + "/args.gn"), 'a')
+        f.write("icu_use_data_file = false")
+        f.close()
+        os.system("ninja " + ninja_params)
+    elif platform == "ios":
+        old_str = "bitcode_marker = true"
+        new_str = "bitcode_marker = false"
+        file_data = ""
+        with open(Path(flutter_root_path + "/out/" + output_path + "/args.gn"), "r") as f:
+            for line in f:
+                if old_str in line:
+                    line = line.replace(old_str,new_str)
+                file_data += line
+            file_data += "icu_use_data_file = false"
+        with open(Path(flutter_root_path + "/out/" + output_path + "/args.gn"),"w") as f:
+            f.write(file_data)
+        os.system("ninja " + ninja_params)
+    elif platform == "windows":
+        f = open(Path(flutter_root_path + "/out/" + output_path + "/args.gn"), 'a')
+        f.write("skia_use_angle = true\nskia_use_egl = true")
+        f.close()
+        os.system("ninja " + ninja_params1)
+        os.system("ninja " + ninja_params2)
+        os.system("ninja " + ninja_params3)
+        os.chdir(Path(flutter_root_path + "/third_party/icu/flutter/"))
+        os.system("ld -r -b binary -o icudtl.o icudtl.dat")
+    elif platform == "android":
+        os.system("ninja " + ninja_params)
+
+def build_engine():
+    global flutter_root_path
+    global work_path
+    global runtime_mode
+    global platform
+    global output_path
+    global bitcode
+    dest_folder=""
+
+    print("\nStarting build engine...")
+    if platform == "windows":
+        dest_folder = "x86_64"
+    elif platform == "mac":
+        dest_folder = "osx"
+    elif platform == "android":
+        dest_folder = "android"
+        os.chdir(work_path + "/../")
+        os.system("python " + flutter_root_path + "/flutter/sky/tools/objcopy.py --objcopy " + flutter_root_path + "/third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-objcopy --input " + flutter_root_path + "/third_party/icu/flutter/icudtl.dat --output icudtl.o --arch arm")
+    elif platform == "ios":
+        dest_folder = "ios"
+    if not os.path.exists(Path(work_path + "/../../com.unity.uiwidgets/Runtime/Plugins/" + dest_folder)):
+        os.makedirs(Path(work_path + "/../../com.unity.uiwidgets/Runtime/Plugins/" + dest_folder))
+    os.chdir(Path(work_path + "/../"))
+    if runtime_mode == "release":
+        if os.path.exists(Path(work_path + "/../build_release")):
+            shutil.rmtree(Path(work_path + "/../build_release"))
+        if platform == "windows":
+            os.system("bee.exe win_release")
+            copy_file(Path(work_path + "/../build_release/"), Path(work_path + "/../../com.unity.uiwidgets/Runtime/Plugins/" + dest_folder))
+        else:
+            os.system("mono bee.exe " + platform +"_release")
+            copy_file(Path(work_path + "/../build_release/"), Path(work_path + "/../../com.unity.uiwidgets/Runtime/Plugins/" + dest_folder))
+            if platform == "android":
+                tundra_file=Path(work_path + "/../artifacts/tundra.dag.json")
+                rsp = get_rsp(tundra_file, runtime_mode)
+                if not os.path.exists(Path(work_path + "/../artifacts/rsp/backup")):
+                    os.makedirs(Path(work_path + "/../artifacts/rsp/backup"))
+                copy_file(Path(work_path + "/../" + rsp), Path(work_path + "/../artifacts/rsp/backup"))
+                os.chdir(Path(work_path))
+                rsp_patch()
+                os.chdir(Path(work_path + "/../"))
+                os.system("artifacts/Stevedore/android-ndk-mac/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang++ " + "@\"" + rsp + "\"")
+                os.system(flutter_root_path + "/buildtools/mac-x64/clang/bin/clang++ " + "@\"" + rsp + "\"")
+                copy_file(Path(work_path + "/../artifacts/libUIWidgets/release_Android_arm32/libUIWidgets.so"), Path(work_path + "/../../com.unity.uiwidgets/Runtime/Plugins/Android"))
+            elif platform == "ios":
+                print("\nStarting prlink library...")
+                os.chdir(Path(work_path + "/../"))
+                tundra_file=Path(work_path + "/../artifacts/tundra.dag.json")
+                prelinkfiles(tundra_file, runtime_mode, output_path, work_path, bitcode)
+    elif runtime_mode == "debug":
+        if os.path.exists(Path(work_path + "/../build_debug")):
+            shutil.rmtree(Path(work_path + "/../build_debug"))
+        if platform == "windows":
+            os.system("bee.exe win_debug")
+        else:
+            os.system("mono bee.exe " + platform +"_debug")
+        copy_file(Path(work_path + "/../build_debug/"), Path(work_path + "/../../com.unity.uiwidgets/Runtime/Plugins/" + dest_folder))
+        if platform == "ios":
+            print("\nStarting prlink library...")
+            os.chdir(Path(work_path + "/../"))
+            tundra_file=Path(work_path + "/../artifacts/tundra.dag.json")
+            prelinkfiles(tundra_file, runtime_mode, output_path, work_path, bitcode)
+
+def revert_patches():
+    global flutter_root_path
+    print("\nRevert patches...")
+
+    os.chdir(Path(flutter_root_path + "/flutter/third_party/txt"))
+    os.system("patch -R < BUILD.gn.patch")
+
+    if platform == "ios" or platform == "mac":
+        os.chdir(Path(flutter_root_path + "/build/mac"))
+        os.system("patch -R < find_sdk.patch")
+        if platform == "ios":
+            os.chdir(Path(work_path))
+            if os.path.exists(Path(work_path + "/bitcode.conf")):
+                os.remove("bitcode.conf")
+    elif platform == "android":
+        os.chdir(Path(flutter_root_path + "/build/mac"))
+        os.system("patch -R < find_sdk.patch")
+
+        os.chdir(Path(flutter_root_path + "/build/secondary/third_party/libcxxabi"))
+        os.system("patch -R < BUILD_2.gn.patch")
+    elif platform == "windows":
+        os.chdir(Path(flutter_root_path + "/third_party/angle"))
+        os.system("patch -R < BUILD.gn.patch")
+
+        os.chdir(Path(flutter_root_path + "/third_party/angle/src/libANGLE/renderer/d3d/d3d11/"))
+        os.system("patch -R < cpp.patch")
+
+        os.chdir(Path(flutter_root_path + "/third_party/skia/"))
+        os.system("patch -R < BUILD_2.gn.patch")
+
+def copy_file(source_path, target_path):
+    if not os.path.exists(target_path):
+        os.makedirs(target_path)
+    if os.path.exists(source_path):
+        if os.path.isfile(source_path):
+            shutil.copy(source_path, target_path)
+        elif os.path.isdir(source_path):
+            for root, dirs, files in os.walk(source_path):
+                for file in files:
+                    src_file = os.path.join(root, file)
+                    shutil.copy(src_file, target_path)
+    
+
+def rsp_patch():
+    global work_path
+    file_data = ""
+    file = Path(work_path + "/../artifacts/rsp/14590475716575637239.rsp")
+    old_str = ',--icf-iterations=5'
+    with open(file, "r") as f:
+        for line in f:
+            if old_str in line:
+                line = line.replace(old_str,'')
+            file_data += line
+    with open(file,"w") as f:
+        f.write(file_data)
+    return "rsp modified"
+
+def get_xcode_path():
+    res = os.popen('xcode-select -p')
+    return res.read()
+
+def get_target_files(tundra_file, runtime_mode):
+    if not os.path.exists(tundra_file):
+        print('tundra.dag.json file not found')
+        return None
+    with open(tundra_file, 'r') as f:
+        temp = json.loads(f.read())
+        json_list = temp['Nodes']
+        target_files=''
+        for item in json_list:
+            if item['Annotation'].startswith('Lib_iOS_arm64') and item['Annotation'].find(runtime_mode) != -1:
+                action = item['Action']
+                o_file_list = action.split("\"")
+                for o in o_file_list:
+                    if o.endswith('.o'):
+                        target_files += ' '+o
+        return target_files
+    
+def prelinkfiles(tundra_file, runtime_mode, output_path, work_path, bitcode):
+    global flutter_root_path
+    target_files = get_target_files(tundra_file, runtime_mode)
+    if not target_files:
+        print("get prelink xxx.o files failed")
+    else:
+        os.system('nm -j ' + flutter_root_path + '/out/' + output_path + '/obj/flutter/third_party/txt/libtxt_lib.a > third.symbol')
+        xcode_path = get_xcode_path().strip()
+        os.system('\"' + xcode_path + '/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld" -r -arch arm64 ' + bitcode + ' -syslibroot ' + xcode_path + '/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk -unexported_symbols_list third.symbol ' + target_files + ' ' + flutter_root_path + '/out/' + output_path + '/obj/flutter/third_party/txt/libtxt_lib.a -o "libUIWidgets.o"')
+        os.system('\"' + xcode_path + '/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool" -arch_only arm64 -static "libUIWidgets.o" -o "libUIWidgets.a"')
+        os.system('\"' + xcode_path + '/Toolchains/XcodeDefault.xctoolchain/usr/bin/strip" -x "libUIWidgets.a"')
+        copy_file(Path(work_path + "/../libUIWidgets.a"), Path(work_path + "/../../com.unity.uiwidgets/Runtime/Plugins/ios/libUIWidgets.a"))
+
+def get_rsp(tundra_file, runtime_mode):
+    if not os.path.exists(tundra_file):
+        print('tundra.dag.json file not found')
+        return None
+    with open(tundra_file, 'r') as f:
+        temp = json.loads(f.read())
+        json_list = temp['Nodes']
+        target_files=''
+        for item in json_list:
+            if item['Annotation'].startswith('Link_Android_arm32') and item['Annotation'].find(runtime_mode) != -1:
+                action_list = item['Inputs']
+                for o in action_list:
+                    if o.endswith('.rsp'):
+                        return o
+
+def show_help():
+    help_note = '''
+SYNOPSIS
+    python3 lib_build.py <-p <android|ios|windows|mac>> <-r <engine_path>> <-m <debug|release>> [-v [visual_studio_path]] [-e] [-h] [--help].
+
+NOTION
+    python3 is required to run this script. For windows, visual studio 2017 need to be installed. For mac, Xcode need to be installed and Mac version should be 10 or 11.
+    You can build for mac/ios/android platforms on Mac. You can only build for windows platform on Windows
+
+DESCRIPTION
+    lib_build.py will setup the build environment and build UIWidgets' engine.
+
+    The following options are available:
+
+    required parameters:
+
+    -p                Target platform, available values: android, windows, mac, ios
+
+    -m                Build mode, available values: debug, release
+
+    -r                The build target directory, third party dependencies (e.g., flutter engine) will be downloaded and built here
+
+    optional parameters:
+
+    -h, --help        Show this help message
+
+    -e                Enable bitcode for ios targets and can only be used when "-p ios" is specified
+
+    -v                The visual studio path in your PC, e.g., "C:\Program Files (x86)/Microsoft Visual Studio/2017/Community". It is required if "-p window" is specified
+'''
+    print(help_note)
+
+
+def main():
+    get_opts()
+    engine_path_check()
+    bitcode_conf()
+    set_params()
+    set_env_verb()   
+    get_depot_tools()
+    get_flutter_engine()
+    compile_engine()
+    build_engine()
+    revert_patches()
+
+if __name__=="__main__":
+    main()