Use Environment.Exit instead of returning null

TwitchDownloaderCLI/Modes/DownloadChat.cs

@@ -16,7 +16,7 @@ internal static void Download(ChatDownloadArgs inputOptions)
         {
             var progress = new CliTaskProgress(inputOptions.LogLevel);
 
-            var collisionHandler = new FileCollisionHandler(inputOptions);
+            var collisionHandler = new FileCollisionHandler(inputOptions, progress);
             var downloadOptions = GetDownloadOptions(inputOptions, collisionHandler, progress);
 
             var chatDownloader = new ChatDownloader(downloadOptions, progress);

TwitchDownloaderCLI/Modes/DownloadClip.cs

@@ -21,7 +21,7 @@ internal static void Download(ClipDownloadArgs inputOptions)
                 FfmpegHandler.DetectFfmpeg(inputOptions.FfmpegPath, progress);
             }
 
-            var collisionHandler = new FileCollisionHandler(inputOptions);
+            var collisionHandler = new FileCollisionHandler(inputOptions, progress);
             var downloadOptions = GetDownloadOptions(inputOptions, collisionHandler, progress);
 
             var clipDownloader = new ClipDownloader(downloadOptions, progress);

TwitchDownloaderCLI/Modes/DownloadVideo.cs

@@ -19,7 +19,7 @@ internal static void Download(VideoDownloadArgs inputOptions)
 
             FfmpegHandler.DetectFfmpeg(inputOptions.FfmpegPath, progress);
 
-            var collisionHandler = new FileCollisionHandler(inputOptions);
+            var collisionHandler = new FileCollisionHandler(inputOptions, progress);
             var downloadOptions = GetDownloadOptions(inputOptions, collisionHandler, progress);
 
             var videoDownloader = new VideoDownloader(downloadOptions, progress);

TwitchDownloaderCLI/Modes/MergeTs.cs

@@ -14,7 +14,7 @@ internal static void Merge(TsMergeArgs inputOptions)
 
             progress.LogInfo("The TS merger is experimental and is subject to change without notice in future releases.");
 
-            var collisionHandler = new FileCollisionHandler(inputOptions);
+            var collisionHandler = new FileCollisionHandler(inputOptions, progress);
             var mergeOptions = GetMergeOptions(inputOptions, collisionHandler);
 
             var tsMerger = new TsMerger(mergeOptions, progress);

TwitchDownloaderCLI/Modes/RenderChat.cs

@@ -19,7 +19,7 @@ internal static void Render(ChatRenderArgs inputOptions)
 
             FfmpegHandler.DetectFfmpeg(inputOptions.FfmpegPath, progress);
 
-            var collisionHandler = new FileCollisionHandler(inputOptions);
+            var collisionHandler = new FileCollisionHandler(inputOptions, progress);
             var renderOptions = GetRenderOptions(inputOptions, collisionHandler, progress);
 
             using var chatRenderer = new ChatRenderer(renderOptions, progress);

TwitchDownloaderCLI/Modes/UpdateChat.cs

@@ -16,7 +16,7 @@ internal static void Update(ChatUpdateArgs inputOptions)
         {
             var progress = new CliTaskProgress(inputOptions.LogLevel);
 
-            var collisionHandler = new FileCollisionHandler(inputOptions);
+            var collisionHandler = new FileCollisionHandler(inputOptions, progress);
             var updateOptions = GetUpdateOptions(inputOptions, collisionHandler, progress);
 
             var chatUpdater = new ChatUpdater(updateOptions, progress);

TwitchDownloaderCLI/Tools/FileCollisionHandler.cs

@@ -1,37 +1,45 @@
 using System;
-using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using TwitchDownloaderCLI.Models;
 using TwitchDownloaderCLI.Modes.Arguments;
+using TwitchDownloaderCore.Interfaces;
 using TwitchDownloaderCore.Tools;
 
 namespace TwitchDownloaderCLI.Tools
 {
     internal class FileCollisionHandler
     {
         private readonly IFileCollisionArgs _collisionArgs;
+        private readonly ITaskLogger _logger;
 
-        public FileCollisionHandler(IFileCollisionArgs collisionArgs)
+        public FileCollisionHandler(IFileCollisionArgs collisionArgs, ITaskLogger logger)
         {
             _collisionArgs = collisionArgs;
+            _logger = logger;
         }
 
-        [return: MaybeNull]
         public FileInfo HandleCollisionCallback(FileInfo fileInfo)
         {
             return _collisionArgs.OverwriteBehavior switch
             {
                 OverwriteBehavior.Overwrite => fileInfo,
-                OverwriteBehavior.Exit => null,
+                OverwriteBehavior.Exit => Exit(fileInfo),
                 OverwriteBehavior.Rename => FilenameService.GetNonCollidingName(fileInfo),
                 OverwriteBehavior.Prompt => PromptUser(fileInfo),
                 _ => throw new ArgumentOutOfRangeException(nameof(_collisionArgs.OverwriteBehavior), _collisionArgs.OverwriteBehavior, null)
             };
         }
 
-        [return: MaybeNull]
+        private FileInfo Exit(FileInfo fileInfo)
+        {
+            _logger.LogInfo($"The file '{fileInfo.FullName}' already exists, exiting.");
+            Environment.Exit(1);
+            return null;
+        }
+
         private static FileInfo PromptUser(FileInfo fileInfo)
         {
+            // Deliberate use of Console.WriteLine instead of logger. Do not change.
             Console.WriteLine($"The file '{fileInfo.FullName}' already exists.");
 
             while (true)
@@ -43,7 +51,8 @@ private static FileInfo PromptUser(FileInfo fileInfo)
                     case "o" or "overwrite":
                         return fileInfo;
                     case "e" or "exit":
-                        return null;
+                        Environment.Exit(1);
+                        break;
                     case "r" or "rename":
                         return FilenameService.GetNonCollidingName(fileInfo);
                 }