public FileSystemPath GetActualAppPathForSolution()
{
if (mySolution.IsVirtualSolution())
{
return(FileSystemPath.Empty);
}
foreach (var project in GetTopLevelProjectWithReadLock(mySolution))
{
var path = myUnityProjectFileCache.GetAppPath(project);
if (path != null)
{
return(path);
}
}
return(FileSystemPath.Empty);
}
private void SetProjectLangVersion(IProject project, ISettingsStorageMountPoint mountPoint)
{
// Only if it's a generated project. Class libraries can use whatever language version they want
if (!project.IsUnityGeneratedProject())
{
return;
}
#region Explanation
// Make sure we don't suggest code changes that won't compile in Unity due to mismatched C# language levels
// (e.g. C#6 "elvis" operator)
//
// * Unity prior to 5.5 uses an old mono compiler that only supports C# 4
// * Unity 5.5 and later adds C# 6 support as an option. This is enabled by setting
// the API compatibility level to NET_4_6
// * The CSharp60Support plugin replaces the compiler with either C# 6 or C# 7.0 or 8.0
// It can be recognised by a folder called `CSharp60Support` or `CSharp70Support` or `CSharp80Support`
// in the root of the project
// (https://bitbucket.org/alexzzzz/unity-c-5.0-and-6.0-integration)
// * Note that since Unity 2017.2 till 2018.3, we've been special-cased in the Unity csproj generation
// and we've been getting v4.5 for old runtime and default values (4.7.1) for new. So where
// it says 3.5 below, that depends on the version of Unity. Older versions will give us 3.5,
// newer versions 4.5.
//
// Scenarios:
// * No VSTU installed (including Unity 5.5)
// .csproj has NO `LangVersion`. `TargetFrameworkVersion` will be `v3.5`
// * Early versions of VSTU
// .csproj has NO `LangVersion`. `TargetFrameworkVersion` will be `v3.5`
// * Later versions of VSTU
// `LangVersion` is correctly set to "4". `TargetFrameworkVersion` will be `v3.5`
// OR `LangVersion` is set to "6" or "latest".
// * VSTU for 5.5
// `LangVersion` is set to "default". `TargetFrameworkVersion` will be `v3.5` or `v4.6`
// Note that "default" for VS"15" or Rider will be C# 7.0!
// * Unity3dRider is installed
// Uses Unity's own generation and adds correct `LangVersion`
// `TargetFrameworkVersion` will be correct for the selected runtime
// * CSharp60Support is installed
// .csproj has NO `LangVersion`
// `TargetFrameworkVersion` is NOT accurate (support for C# 6 is not dependent on/trigger by .net 4.6)
// Look for `CSharp60Support` or `CSharp70Support` folders
// * Unity 2018.x+. LangVersion is `latest`. MSBuild 16 treats `newest` as C# 8. Re# and Rider start suggesting it.
//
// Actions:
// * If `LangVersion` is missing or "default"
// then override based on `TargetFrameworkVersion` or presence of `CSharp60Support`/`CSharp70Support`
// else do nothing
// * If `LangVersion` is "latest"
// then override based on `CSharp80Support` presence or LangVersion matching Roslyn bundled in Unity
//
// Notes:
// * Unity and VSTU have two separate .csproj routines. VSTU adds extra references,
// the VSTU project flavour GUID and imports UnityVs.targets, which disables the
// `GenerateTargetFrameworkMonikerAttribute` target
// * CSharp60Support post-processes the .csproj file directly if VSTU is not installed.
// If it is installed, it registers a delegate with `ProjectFilesGenerator.ProjectFileGeneration`
// and removes it before it's written to disk
// * `LangVersion` can be conditionally specified, which makes checking for "default" awkward
// * If Unity3dRider + CSharp60Support are both installed, last write wins
// Order of post-processing is non-deterministic, so Rider's LangVersion might be removed
#endregion
var languageLevel = ReSharperSettingsCSharpLanguageLevel.Default;
if (IsLangVersionMissing(project) || IsLangVersionDefault(project))
{
// Support for https://bitbucket.org/alexzzzz/unity-c-5.0-and-6.0-integration
// See also https://github.com/JetBrains/resharper-unity/issues/50#issuecomment-257611218
if (project.Location.CombineWithShortName("CSharp70Support").ExistsDirectory)
{
languageLevel = ReSharperSettingsCSharpLanguageLevel.CSharp70;
}
else if (project.Location.CombineWithShortName("CSharp60Support").ExistsDirectory)
{
languageLevel = ReSharperSettingsCSharpLanguageLevel.CSharp60;
}
else
{
languageLevel = IsTargetFrameworkAtLeast46(project)
? ReSharperSettingsCSharpLanguageLevel.CSharp60
: ReSharperSettingsCSharpLanguageLevel.CSharp40;
}
}
if (IsLangVersionLatest(project))
{
if (project.Location.CombineWithShortName("CSharp80Support").ExistsDirectory) // https://forum.unity.com/threads/would-the-roslyn-compiler-compile-c-8-0-preview.598069/
{
languageLevel = ReSharperSettingsCSharpLanguageLevel.CSharp80;
}
else
{
var appPath = myUnityProjectFileCache.GetAppPath(project);
var contentPath = UnityInstallationFinder.GetApplicationContentsPath(appPath);
if (!contentPath.IsNullOrEmpty())
{
var roslynDir = contentPath.Combine("Tools").Combine("Roslyn");
if (roslynDir.ExistsDirectory)
{
languageLevel = myLanguageLevelProjectProperty.GetLatestAvailableLanguageLevel(roslynDir).ToSettingsLanguageLevel();
}
}
}
}
// Always set a value. It's either the overridden value, or Default, which resets to whatever is in the
// project file
SetValue(mountPoint, (CSharpLanguageProjectSettings s) => s.LanguageLevel, languageLevel);
}
