Added support for excluding search paths via globbing patterns

src/OmniSharp.Abstractions/FileSystem/FileSystemHelper.cs

@@ -0,0 +1,37 @@
+using System.Collections.Generic;
+using System.Composition;
+using System.Linq;
+using Microsoft.Extensions.FileSystemGlobbing;
+using OmniSharp.Options;
+
+namespace OmniSharp.FileSystem
+{
+    [Export, Shared]
+    public class FileSystemHelper
+    {
+        private readonly OmniSharpOptions _omniSharpOptions;
+        private readonly IOmniSharpEnvironment _omniSharpEnvironment;
+
+        [ImportingConstructor]
+        public FileSystemHelper(OmniSharpOptions omniSharpOptions, IOmniSharpEnvironment omniSharpEnvironment)
+        {
+            _omniSharpOptions = omniSharpOptions;
+            _omniSharpEnvironment = omniSharpEnvironment;
+        }
+
+        public IEnumerable<string> GetFiles(string includePattern) => GetFiles(includePattern, _omniSharpEnvironment.TargetDirectory);
+
+        public IEnumerable<string> GetFiles(string includePattern, string targetDirectory)
+        {
+            var matcher = new Matcher();
+            matcher.AddInclude(includePattern);
+
+            if (_omniSharpOptions.FileOptions.ExcludeSearchPatterns != null && _omniSharpOptions.FileOptions.ExcludeSearchPatterns.Any())
+            {
+                matcher.AddExcludePatterns(_omniSharpOptions.FileOptions.ExcludeSearchPatterns);
+            }
+
+            return matcher.GetResultsInFullPath(targetDirectory);
+        }
+    }
+}

src/OmniSharp.Abstractions/Options/FileOptions.cs

@@ -0,0 +1,7 @@
+namespace OmniSharp.Options
+{
+    public class FileOptions
+    {
+        public string[] ExcludeSearchPatterns { get; set; } = new[] { "**/node_modules/**/*", "**/bin/**/*", "**/obj/**/*" };
+    }
+}

src/OmniSharp.Abstractions/Options/OmniSharpOptions.cs

@@ -7,5 +7,7 @@ public class OmniSharpOptions
         public RoslynExtensionsOptions RoslynExtensionsOptions { get; } = new RoslynExtensionsOptions();
 
         public FormattingOptions FormattingOptions { get; } = new FormattingOptions();
+
+        public FileOptions FileOptions { get; } = new FileOptions();
     }
 }

src/OmniSharp.Cake/CakeProjectSystem.cs

@@ -12,11 +12,10 @@
 using Microsoft.CodeAnalysis.Scripting;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Logging;
-using OmniSharp.Cake.Configuration;
 using OmniSharp.Cake.Services;
+using OmniSharp.FileSystem;
 using OmniSharp.FileWatching;
 using OmniSharp.Helpers;
-using OmniSharp.Models.UpdateBuffer;
 using OmniSharp.Models.WorkspaceInformation;
 using OmniSharp.Roslyn.Utilities;
 using OmniSharp.Services;
@@ -32,6 +31,7 @@ public class CakeProjectSystem : IProjectSystem
         private readonly IAssemblyLoader _assemblyLoader;
         private readonly ICakeScriptService _scriptService;
         private readonly IFileSystemWatcher _fileSystemWatcher;
+        private readonly FileSystemHelper _fileSystemHelper;
         private readonly ILogger<CakeProjectSystem> _logger;
         private readonly ConcurrentDictionary<string, ProjectInfo> _projects;
         private readonly Lazy<CSharpCompilationOptions> _compilationOptions;
@@ -50,6 +50,7 @@ public CakeProjectSystem(
             IAssemblyLoader assemblyLoader,
             ICakeScriptService scriptService,
             IFileSystemWatcher fileSystemWatcher,
+            FileSystemHelper fileSystemHelper,
             ILoggerFactory loggerFactory)
         {
             _workspace = workspace ?? throw new ArgumentNullException(nameof(workspace));
@@ -58,6 +59,7 @@ public CakeProjectSystem(
             _assemblyLoader = assemblyLoader ?? throw new ArgumentNullException(nameof(assemblyLoader));
             _scriptService = scriptService ?? throw new ArgumentNullException(nameof(scriptService));
             _fileSystemWatcher = fileSystemWatcher ?? throw new ArgumentNullException(nameof(fileSystemWatcher));
+            _fileSystemHelper = fileSystemHelper;
             _logger = loggerFactory?.CreateLogger<CakeProjectSystem>() ?? throw new ArgumentNullException(nameof(loggerFactory));
 
             _projects = new ConcurrentDictionary<string, ProjectInfo>();
@@ -72,7 +74,7 @@ public void Initalize(IConfiguration configuration)
             _logger.LogInformation($"Detecting Cake files in '{_environment.TargetDirectory}'.");
 
             // Nothing to do if there are no Cake files
-            var allCakeFiles = Directory.GetFiles(_environment.TargetDirectory, "*.cake", SearchOption.AllDirectories);
+            var allCakeFiles = _fileSystemHelper.GetFiles("**/*.cake").ToArray();
             if (allCakeFiles.Length == 0)
             {
                 _logger.LogInformation("Could not find any Cake files");

src/OmniSharp.MSBuild/ProjectSystem.cs

@@ -8,6 +8,7 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Logging;
 using OmniSharp.Eventing;
+using OmniSharp.FileSystem;
 using OmniSharp.FileWatching;
 using OmniSharp.Models.WorkspaceInformation;
 using OmniSharp.MSBuild.Discovery;
@@ -30,6 +31,7 @@ public class ProjectSystem : IProjectSystem
         private readonly MetadataFileReferenceCache _metadataFileReferenceCache;
         private readonly IEventEmitter _eventEmitter;
         private readonly IFileSystemWatcher _fileSystemWatcher;
+        private readonly FileSystemHelper _fileSystemHelper;
         private readonly ILoggerFactory _loggerFactory;
         private readonly ILogger _logger;
 
@@ -56,6 +58,7 @@ public ProjectSystem(
             MetadataFileReferenceCache metadataFileReferenceCache,
             IEventEmitter eventEmitter,
             IFileSystemWatcher fileSystemWatcher,
+            FileSystemHelper fileSystemHelper,
             ILoggerFactory loggerFactory)
         {
             _environment = environment;
@@ -66,6 +69,7 @@ public ProjectSystem(
             _metadataFileReferenceCache = metadataFileReferenceCache;
             _eventEmitter = eventEmitter;
             _fileSystemWatcher = fileSystemWatcher;
+            _fileSystemHelper = fileSystemHelper;
             _loggerFactory = loggerFactory;
 
             _projectsToProcess = new Queue<ProjectFileInfo>();
@@ -121,7 +125,7 @@ private IEnumerable<string> GetInitialProjectPaths()
             // Finally, if there isn't a single solution immediately available,
             // Just process all of the projects beneath the root path.
             _solutionFileOrRootPath = _environment.TargetDirectory;
-            return Directory.GetFiles(_environment.TargetDirectory, "*.csproj", SearchOption.AllDirectories);
+            return _fileSystemHelper.GetFiles("**/*.csproj");
         }
 
         private IEnumerable<string> GetProjectPathsFromSolution(string solutionFilePath)

src/OmniSharp.Script/ScriptProjectSystem.cs

@@ -13,6 +13,7 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyModel;
 using Microsoft.Extensions.Logging;
+using OmniSharp.FileSystem;
 using OmniSharp.FileWatching;
 using OmniSharp.Models.WorkspaceInformation;
 using OmniSharp.Services;
@@ -36,7 +37,7 @@ public class ScriptProjectSystem : IProjectSystem
         private readonly IOmniSharpEnvironment _env;
         private readonly ILogger _logger;
         private readonly IFileSystemWatcher _fileSystemWatcher;
-
+        private readonly FileSystemHelper _fileSystemHelper;
         private readonly CompilationDependencyResolver _compilationDependencyResolver;
 
         private ScriptOptions _scriptOptions;
@@ -45,12 +46,13 @@ public class ScriptProjectSystem : IProjectSystem
 
         [ImportingConstructor]
         public ScriptProjectSystem(OmniSharpWorkspace workspace, IOmniSharpEnvironment env, ILoggerFactory loggerFactory,
-            MetadataFileReferenceCache metadataFileReferenceCache, IFileSystemWatcher fileSystemWatcher)
+            MetadataFileReferenceCache metadataFileReferenceCache, IFileSystemWatcher fileSystemWatcher, FileSystemHelper fileSystemHelper)
         {
             _metadataFileReferenceCache = metadataFileReferenceCache;
             _workspace = workspace;
             _env = env;
             _fileSystemWatcher = fileSystemWatcher;
+            _fileSystemHelper = fileSystemHelper;
             _logger = loggerFactory.CreateLogger<ScriptProjectSystem>();
             _projects = new ConcurrentDictionary<string, ProjectInfo>();
 
@@ -86,7 +88,7 @@ public void Initalize(IConfiguration configuration)
             _logger.LogInformation($"Detecting CSX files in '{_env.TargetDirectory}'.");
 
             // Nothing to do if there are no CSX files
-            var allCsxFiles = Directory.GetFiles(_env.TargetDirectory, "*.csx", SearchOption.AllDirectories);
+            var allCsxFiles = _fileSystemHelper.GetFiles("**/*.csx").ToArray();
             if (allCsxFiles.Length == 0)
             {
                 _logger.LogInformation("Could not find any CSX files");

tests/OmniSharp.Tests/FileSystemHelperFacts.cs

@@ -0,0 +1,85 @@
+using Microsoft.Extensions.Logging;
+using OmniSharp.FileSystem;
+using OmniSharp.Options;
+using OmniSharp.Services;
+using System.Linq;
+using TestUtility;
+using Xunit;
+
+namespace OmniSharp.Tests
+{
+    public class FileSystemHelperFacts
+    {
+        [Fact]
+        public void FileSystemHelperFacts_CanExcludeSearchPath_File()
+        {
+            var helper = CreateFileSystemHelper("**/ProjectWithSdkProperty.csproj");
+
+            var msbuildProjectFiles = helper.GetFiles("**/*.csproj");
+            Assert.NotEmpty(msbuildProjectFiles);
+
+            var projectWithSdkProperty = msbuildProjectFiles.FirstOrDefault(p => p.Contains("ProjectWithSdkProperty"));
+            Assert.Null(projectWithSdkProperty);
+        }
+
+        [Fact]
+        public void FileSystemHelperFacts_CanExcludeSearchPath_MultipleFiles()
+        {
+            var helper = CreateFileSystemHelper("**/MSTestProject.csproj", "**/NUnitTestProject.csproj");
+
+            var msbuildProjectFiles = helper.GetFiles("**/*.csproj");
+            Assert.NotEmpty(msbuildProjectFiles);
+
+            var msTestProject = msbuildProjectFiles.FirstOrDefault(p => p.Contains("MSTestProject"));
+            Assert.Null(msTestProject);
+
+            var nunitTestProject = msbuildProjectFiles.FirstOrDefault(p => p.Contains("NUnitTestProject"));
+            Assert.Null(nunitTestProject);
+        }
+
+        [Fact]
+        public void FileSystemHelperFacts_CanExcludeSearchPath_Folder()
+        {
+            var helper = CreateFileSystemHelper("**/ProjectWithSdkProperty/**/*");
+
+            var msbuildProjectFiles = helper.GetFiles("**/*.csproj");
+            Assert.NotEmpty(msbuildProjectFiles);
+
+            var projectWithSdkProperty = msbuildProjectFiles.FirstOrDefault(p => p.Contains("ProjectWithSdkProperty"));
+            Assert.Null(projectWithSdkProperty);
+        }
+
+        [Fact]
+        public void FileSystemHelperFacts_CanExcludeSearchPath_MultipleFolders()
+        {
+            var helper = CreateFileSystemHelper("**/MSTestProject/**/*", "**/NUnitTestProject/**/*");
+
+            var msbuildProjectFiles = helper.GetFiles("**/*.csproj");
+            Assert.NotEmpty(msbuildProjectFiles);
+
+            var msTestProject = msbuildProjectFiles.FirstOrDefault(p => p.Contains("MSTestProject"));
+            Assert.Null(msTestProject);
+
+            var nunitTestProject = msbuildProjectFiles.FirstOrDefault(p => p.Contains("NUnitTestProject"));
+            Assert.Null(nunitTestProject);
+        }
+
+        [Fact]
+        public void FileSystemHelperFacts_CanHandleInvalidPath()
+        {
+            var helper = CreateFileSystemHelper("!@@#$$@%&&*()_+");
+
+            var ex = Record.Exception(() => helper.GetFiles("**/*.csproj"));
+            Assert.Null(ex);
+        }
+
+        private FileSystemHelper CreateFileSystemHelper(params string[] excludePatterns)
+        {
+            var environment = new OmniSharpEnvironment(TestAssets.Instance.TestAssetsFolder, 1000, LogLevel.Information, null);
+            var options = new OmniSharpOptions();
+            options.FileOptions.ExcludeSearchPatterns = excludePatterns;
+            var helper = new FileSystemHelper(options, environment);
+            return helper;
+        }
+    }
+}