Support ignoring trailing new lines

Author: intitni

Core/Sources/GitHubCopilotService/GitHubCopilotService.swift

@@ -165,7 +165,7 @@ public class GitHubCopilotBaseService {
 
         self.server = server
         localProcessServer = localServer
-        
+
         Task {
             try await server.sendRequest(GitHubCopilotRequest.SetEditorInfo())
         }
@@ -312,6 +312,18 @@ public final class GitHubCopilotSuggestionService: GitHubCopilotBaseService,
                     }
                     return true
                 }
+                .map {
+                    if UserDefaults.shared.value(for: \.gitHubCopilotIgnoreTrailingNewLines) {
+                        var updated = $0
+                        var text = updated.text[...]
+                        while text.hasSuffix("\n") {
+                            text = text.dropLast(1)
+                        }
+                        updated.text = String(text)
+                        return updated
+                    }
+                    return $0
+                }
             try Task.checkCancellation()
             return completions
         }

Core/Sources/HostApp/AccountSettings/CopilotView.swift

@@ -18,7 +18,8 @@ struct CopilotView: View {
         @AppStorage(\.gitHubCopilotProxyUsername) var gitHubCopilotProxyUsername
         @AppStorage(\.gitHubCopilotProxyPassword) var gitHubCopilotProxyPassword
         @AppStorage(\.gitHubCopilotUseStrictSSL) var gitHubCopilotUseStrictSSL
-
+        @AppStorage(\.gitHubCopilotIgnoreTrailingNewLines)
+        var gitHubCopilotIgnoreTrailingNewLines
         init() {}
     }
 
@@ -229,13 +230,20 @@ struct CopilotView: View {
                 Divider()
 
                 Form {
+                    Toggle(
+                        "Ignore Trailing New Lines",
+                        isOn: $settings.gitHubCopilotIgnoreTrailingNewLines
+                    )
                     Toggle("Verbose Log", isOn: $settings.gitHubCopilotVerboseLog)
                 }
 
                 Divider()
 
                 Form {
-                    TextField(text: $settings.gitHubCopilotProxyHost, prompt: Text("xxx.xxx.xxx.xxx, leave it blank to disable proxy.")) {
+                    TextField(
+                        text: $settings.gitHubCopilotProxyHost,
+                        prompt: Text("xxx.xxx.xxx.xxx, leave it blank to disable proxy.")
+                    ) {
                         Text("Proxy Host")
                     }
                     TextField(text: $settings.gitHubCopilotProxyPort, prompt: Text("80")) {

Tool/Sources/Preferences/Keys.swift

@@ -160,6 +160,10 @@ public extension UserDefaultPreferenceKeys {
     var runNodeWith: PreferenceKey<NodeRunner> {
         .init(defaultValue: .env, key: "RunNodeWith")
     }
+    
+    var gitHubCopilotIgnoreTrailingNewLines: PreferenceKey<Bool> {
+        .init(defaultValue: false, key: "GitHubCopilotIgnoreTrailingNewLines")
+    }
 }
 
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