Add git ignore checker

Author: intitni

Tool/Package.swift

@@ -42,6 +42,7 @@ let package = Package(
                 "AppActivator",
             ]
         ),
+        .library(name: "GitIgnoreCheck", targets: ["GitIgnoreCheck"]),
     ],
     dependencies: [
         // A fork of https://github.com/aespinilla/Tiktoken to allow loading from local files.
@@ -202,6 +203,7 @@ let package = Package(
         .target(
             name: "Workspace",
             dependencies: [
+                "GitIgnoreCheck",
                 "UserDefaultsObserver",
                 "SuggestionModel",
                 "Environment",
@@ -235,6 +237,18 @@ let package = Package(
             dependencies: ["FocusedCodeFinder"]
         ),
 
+        .target(
+            name: "GitIgnoreCheck",
+            dependencies: [
+                "Terminal",
+                "Preferences",
+                .product(
+                    name: "ComposableArchitecture",
+                    package: "swift-composable-architecture"
+                ),
+            ]
+        ),
+
         // MARK: - Services
 
         .target(
@@ -302,7 +316,7 @@ let package = Package(
                 .product(
                     name: "ComposableArchitecture",
                     package: "swift-composable-architecture"
-                )
+                ),
             ]
         ),
         .testTarget(
@@ -312,7 +326,7 @@ let package = Package(
                 .product(
                     name: "ComposableArchitecture",
                     package: "swift-composable-architecture"
-                )
+                ),
             ]
         ),
 
@@ -344,6 +358,7 @@ let package = Package(
                 "Preferences",
                 "FocusedCodeFinder",
                 "XcodeInspector",
+                "GitIgnoreCheck",
             ],
             path: "Sources/ChatContextCollectors/ActiveDocumentChatContextCollector"
         ),

Tool/Sources/GitIgnoreCheck/GitIgnoreCheck.swift

@@ -0,0 +1,60 @@
+import Dependencies
+import Foundation
+import Terminal
+import Preferences
+
+public struct CheckIfGitIgnoredDependencyKey: DependencyKey {
+    public static var liveValue: GitIgnoredChecker = DefaultGitIgnoredChecker()
+}
+
+public extension DependencyValues {
+    var gitIgnoredChecker: GitIgnoredChecker {
+        get { self[CheckIfGitIgnoredDependencyKey.self] }
+        set { self[CheckIfGitIgnoredDependencyKey.self] = newValue }
+    }
+}
+
+public protocol GitIgnoredChecker {
+    func checkIfGitIgnored(fileURL: URL) async -> Bool
+}
+
+extension GitIgnoredChecker {
+    func checkIfGitIgnored(filePath: String) async -> Bool {
+        await checkIfGitIgnored(fileURL: URL(fileURLWithPath: filePath))
+    }
+}
+
+struct DefaultGitIgnoredChecker: GitIgnoredChecker {
+    func checkIfGitIgnored(fileURL: URL) async -> Bool {
+        if UserDefaults.shared.value(for: \.disableGitIgnoreCheck) { return false }
+        let terminal = Terminal()
+        guard let gitFolderURL = gitFolderURL(forFileURL: fileURL) else {
+            return false
+        }
+        do {
+            _ = try await terminal.runCommand(
+                "/bin/bash",
+                arguments: ["-c", "check-ignore \"filePath\""],
+                currentDirectoryPath: gitFolderURL.path,
+                environment: [:]
+            )
+            return true
+        } catch {
+            return false
+        }
+    }
+}
+
+func gitFolderURL(forFileURL fileURL: URL) -> URL? {
+    var currentURL = fileURL
+    let fileManager = FileManager.default
+    while currentURL.path != "/" {
+        let gitFolderURL = currentURL.appendingPathComponent(".git")
+        if fileManager.fileExists(atPath: gitFolderURL.path) {
+            return gitFolderURL
+        }
+        currentURL = currentURL.deletingLastPathComponent()
+    }
+    return nil
+}
+

Tool/Sources/Preferences/Keys.swift

@@ -546,6 +546,10 @@ public extension UserDefaultPreferenceKeys {
             key: "FeatureFlag-DisableGitHubCopilotSettingsAutoRefreshOnAppear"
         )
     }
+    
+    var disableGitIgnoreCheck: FeatureFlag {
+        .init(defaultValue: false, key: "FeatureFlag-DisableGitIgnoreCheck")
+    }
 
     var disableEnhancedWorkspace: FeatureFlag {
         .init(