DIR_UNITYPROJECT issue with paths including \u

[sefish]

Please fill in the following fields:

Unity editor version: 2018.4.0 Play Services Resolver version: 1.2.135 Features in Play Services Resolver in use (Android Resolver, iOS Resolver, VersionHandler, etc.): Android Resolver Plugins SDK in use (Firebase, Admob, Facebook, etc.): Platform you are using the Unity editor on (Mac, Windows, or Linux): Windows Platform you are targeting (iOS, Android, and/or desktop): Android Scripting Runtime (Mono, and/or IL2CPP): IL2CPP

Please describe the issue here:

If the Unity project path has a folder starting with a lowercase 'u', the generated build.gradle file will not compile with the error:

General error during parsing: Did not find four digit hex character code. line: 31 col:61

groovyjarjarantlr.TokenStreamIOException: Did not find four digit hex character code. line: 31 col:61

This is caused by the following line having a \u in it which is still interpreted to be a unicode escape sequence.

def unityProjectPath = $/file:///C:\Projects\test\unity/$.replace("\\", "/")

[google-oss-bot]

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[stewartmiles]

@sefish it sounds like we should probably change the insertion of the project path based upon the Gradle version shipped with Unity as it sounds like the Gradle version with 2018.4.0 isn't interpreting dollar slashy strings correctly. '\' is not supposed to be treated as an escape character.

[stewartmiles]

@sefish just to clarify when you say the build fails, what are you using to build? Are you building in Unity itself or exporting the project and using Android Studio? If you're using Android Studio have you tried updating to see whether it parses dollar slashy strings correctly?

[sefish]

@stewartmiles I've tried both building in Unity and exporting to Android Studio (v3.6.1). The issue occurs in both. I also tried using different gradle versions (4.6, 5.6, 5.6.4 and 6.2).

Just to check I downloaded groovy 2.5.10 which also throws the same parsing error. Groovy 3.0.2 seems to not have this issue although it still interprets occurences of \u with a valid unicode following it as that character.

So I dug deeper and groovy is actually interpreting the unicode escape sequences before executing the code. This means that it does not know where those sequences come from, it will replace them anywhere, even in comments: GROOVY-5674 GROOVY-6312

Also apparently this is valid groovy code:

\u0064\u0065\u0066 \u0061 \u003d \u0031\u0032\u0033

[sefish]

I reported this as a bug to Unity too. They are probably in the best position to fix it.

[chkuang-g]

This does seem to be a Unity bug. However, we'll see if we can offer some workaround.

[shiena]

This bug has been registered in the unity issue tracker and has been fixed for Unity2019.1 and above. https://issuetracker.unity3d.com/issues/android-windows-template-variable-dir-unityproject-on-windows-does-not-escape-slash-characters

[shiena]

It's not the best, but it's my way around it. Add the following editor extension script to your Unity project.

#if UNITY_ANDROID
using System.IO;
using UnityEditor.Android;

public class FixPathInBuildGradle : IPostGenerateGradleAndroidProject
{
    public int callbackOrder { get; }

    public void OnPostGenerateGradleAndroidProject(string path)
    {
#if !UNITY_2019_1_OR_NEWER && UNITY_EDITOR_WIN
        var buildGradlePath = Path.Combine(path, "build.gradle");
        if (File.Exists(buildGradlePath))
        {
            var dirUnityProject = Directory.GetCurrentDirectory();
            var modDirUnityProject = dirUnityProject.Replace(@"\", "/");

            var contents = File.ReadAllText(buildGradlePath);
            var correctContents = contents.Replace(dirUnityProject, modDirUnityProject);
            File.WriteAllText(buildGradlePath, correctContents);
        }
#endif
    }
}
#endif

[shiena]

The issue was fixed on 2018.4.24.

Android: Fix the issue that DIR_UNITYPROJECT/DIR_GRADLEPROJECT are using the wrong '' director separator on windows. (1088160)

https://unity3d.com/unity/whats-new/2018.4.24