refactor: remove redundant field initialization

src/App.Commands.cs

@@ -22,7 +22,7 @@ public Command(Action<object> action)
             public bool CanExecute(object parameter) => _action != null;
             public void Execute(object parameter) => _action?.Invoke(parameter);
 
-            private Action<object> _action = null;
+            private readonly Action<object> _action;
         }
 
         public static bool IsCheckForUpdateCommandVisible

src/App.axaml.cs

@@ -703,10 +703,10 @@ private string FixFontFamilyName(string input)
         [GeneratedRegex(@"^[a-z]+\s+([a-fA-F0-9]{4,40})(\s+.*)?$")]
         private static partial Regex REG_REBASE_TODO();
 
-        private Models.IpcChannel _ipcChannel = null;
-        private ViewModels.Launcher _launcher = null;
-        private ResourceDictionary _activeLocale = null;
-        private ResourceDictionary _themeOverrides = null;
-        private ResourceDictionary _fontsOverrides = null;
+        private Models.IpcChannel _ipcChannel;
+        private ViewModels.Launcher _launcher;
+        private ResourceDictionary _activeLocale;
+        private ResourceDictionary _themeOverrides;
+        private ResourceDictionary _fontsOverrides;
     }
 }

src/Commands/Blame.cs

@@ -90,7 +90,7 @@ private void ParseLine(string line)
         private readonly StringBuilder _content = new StringBuilder();
         private readonly string _dateFormat = Models.DateTimeFormat.Active.DateOnly;
         private string _lastSHA = string.Empty;
-        private bool _needUnifyCommitSHA = false;
+        private bool _needUnifyCommitSHA;
         private int _minSHALen = 64;
     }
 }

src/Commands/Command.cs

@@ -12,7 +12,7 @@ public partial class Command
     {
         public class Result
         {
-            public bool IsSuccess { get; set; } = false;
+            public bool IsSuccess { get; set; }
             public string StdOut { get; set; } = string.Empty;
             public string StdErr { get; set; } = string.Empty;
 
@@ -27,15 +27,15 @@ public enum EditorType
         }
 
         public string Context { get; set; } = string.Empty;
-        public string WorkingDirectory { get; set; } = null;
+        public string WorkingDirectory { get; set; }
         public EditorType Editor { get; set; } = EditorType.CoreEditor;
         public string SSHKey { get; set; } = string.Empty;
         public string Args { get; set; } = string.Empty;
 
         // Only used in `ExecAsync` mode.
         public CancellationToken CancellationToken { get; set; } = CancellationToken.None;
         public bool RaiseError { get; set; } = true;
-        public Models.ICommandLog Log { get; set; } = null;
+        public Models.ICommandLog Log { get; set; }
 
         public void Exec()
         {

src/Commands/Config.cs

@@ -60,6 +60,6 @@ public async Task<bool> SetAsync(string key, string value, bool allowEmpty = fal
             return await ExecAsync().ConfigureAwait(false);
         }
 
-        private bool _isLocal = false;
+        private readonly bool _isLocal;
     }
 }

src/Commands/Diff.cs

@@ -262,8 +262,8 @@ private void ProcessInlineHighlights()
         private readonly Models.DiffResult _result = new Models.DiffResult();
         private readonly List<Models.TextDiffLine> _deleted = new List<Models.TextDiffLine>();
         private readonly List<Models.TextDiffLine> _added = new List<Models.TextDiffLine>();
-        private Models.TextDiffLine _last = null;
-        private int _oldLine = 0;
-        private int _newLine = 0;
+        private Models.TextDiffLine _last;
+        private int _oldLine;
+        private int _newLine;
     }
 }

src/Commands/QueryCommits.cs

@@ -145,9 +145,9 @@ private async Task MarkFirstMergedAsync()
             }
         }
 
-        private List<Models.Commit> _commits = new List<Models.Commit>();
-        private Models.Commit _current = null;
-        private bool _findFirstMerged = false;
-        private bool _isHeadFound = false;
+        private readonly List<Models.Commit> _commits = new List<Models.Commit>();
+        private readonly bool _findFirstMerged;
+        private Models.Commit _current;
+        private bool _isHeadFound;
     }
 }

src/Commands/QueryCommitsForInteractiveRebase.cs

@@ -89,8 +89,8 @@ private void ParseParent(string data)
             _current.Commit.Parents.AddRange(data.Split(' ', StringSplitOptions.RemoveEmptyEntries));
         }
 
-        private List<Models.InteractiveCommit> _commits = [];
-        private Models.InteractiveCommit _current = null;
+        private readonly List<Models.InteractiveCommit> _commits = [];
         private readonly string _boundary;
+        private Models.InteractiveCommit _current;
     }
 }

src/Models/AvatarManager.cs

@@ -30,17 +30,17 @@ public static AvatarManager Instance
             }
         }
 
-        private static AvatarManager _instance = null;
+        private static AvatarManager _instance;
 
         [GeneratedRegex(@"^(?:(\d+)\+)?(.+?)@.+\.github\.com$")]
         private static partial Regex REG_GITHUB_USER_EMAIL();
 
         private readonly Lock _synclock = new();
+        private readonly List<IAvatarHost> _avatars = new List<IAvatarHost>();
+        private readonly Dictionary<string, Bitmap> _resources = new Dictionary<string, Bitmap>();
+        private readonly HashSet<string> _requesting = new HashSet<string>();
+        private readonly HashSet<string> _defaultAvatars = new HashSet<string>();
         private string _storePath;
-        private List<IAvatarHost> _avatars = new List<IAvatarHost>();
-        private Dictionary<string, Bitmap> _resources = new Dictionary<string, Bitmap>();
-        private HashSet<string> _requesting = new HashSet<string>();
-        private HashSet<string> _defaultAvatars = new HashSet<string>();
 
         public void Start()
         {

src/Models/Blame.cs

@@ -4,7 +4,7 @@ namespace SourceGit.Models
 {
     public class BlameLineInfo
     {
-        public bool IsFirstInGroup { get; set; } = false;
+        public bool IsFirstInGroup { get; set; }
         public string CommitSHA { get; set; } = string.Empty;
         public string Author { get; set; } = string.Empty;
         public string Time { get; set; } = string.Empty;
@@ -15,6 +15,6 @@ public class BlameData
         public string File { get; set; } = string.Empty;
         public List<BlameLineInfo> LineInfos { get; set; } = new List<BlameLineInfo>();
         public string Content { get; set; } = string.Empty;
-        public bool IsBinary { get; set; } = false;
+        public bool IsBinary { get; set; }
     }
 }

src/Models/Change.cs

@@ -45,7 +45,7 @@ public class Change
         public ChangeState WorkTree { get; set; } = ChangeState.None;
         public string Path { get; set; } = "";
         public string OriginalPath { get; set; } = "";
-        public ChangeDataForAmend DataForAmend { get; set; } = null;
+        public ChangeDataForAmend DataForAmend { get; set; }
         public ConflictReason ConflictReason { get; set; } = ConflictReason.None;
 
         public bool IsConflicted => WorkTree == ChangeState.Conflicted;

src/Models/Commit.cs

@@ -29,9 +29,9 @@ public static double OpacityForNotMerged
 
         public string SHA { get; set; } = string.Empty;
         public User Author { get; set; } = User.Invalid;
-        public ulong AuthorTime { get; set; } = 0;
+        public ulong AuthorTime { get; set; }
         public User Committer { get; set; } = User.Invalid;
-        public ulong CommitterTime { get; set; } = 0;
+        public ulong CommitterTime { get; set; }
         public string Subject { get; set; } = string.Empty;
         public List<string> Parents { get; set; } = new();
         public List<Decorator> Decorators { get; set; } = new();
@@ -42,11 +42,11 @@ public static double OpacityForNotMerged
         public string AuthorTimeShortStr => DateTime.UnixEpoch.AddSeconds(AuthorTime).ToLocalTime().ToString(DateTimeFormat.Active.DateOnly);
         public string CommitterTimeShortStr => DateTime.UnixEpoch.AddSeconds(CommitterTime).ToLocalTime().ToString(DateTimeFormat.Active.DateOnly);
 
-        public bool IsMerged { get; set; } = false;
+        public bool IsMerged { get; set; }
         public bool IsCommitterVisible => !Author.Equals(Committer) || AuthorTime != CommitterTime;
         public bool IsCurrentHead => Decorators.Find(x => x.Type is DecoratorType.CurrentBranchHead or DecoratorType.CurrentCommitHead) != null;
 
-        public int Color { get; set; } = 0;
+        public int Color { get; set; }
         public double Opacity => IsMerged ? 1 : OpacityForNotMerged;
         public FontWeight FontWeight => IsCurrentHead ? FontWeight.Bold : FontWeight.Regular;
         public Thickness Margin { get; set; } = new(0);

src/Models/CommitGraph.cs

@@ -243,7 +243,7 @@ public void Recycle(int idx)
                     _colorsQueue.Enqueue(idx);
             }
 
-            private Queue<int> _colorsQueue = new Queue<int>();
+            private readonly Queue<int> _colorsQueue = new Queue<int>();
         }
 
         private class PathHelper
@@ -372,11 +372,11 @@ private void Add(double x, double y)
                 }
             }
 
-            private double _lastY = 0;
-            private double _endY = 0;
+            private double _lastY;
+            private double _endY;
         }
 
-        private static int s_penCount = 0;
+        private static int s_penCount;
         private static readonly List<Color> s_defaultPenColors = [
             Colors.Orange,
             Colors.ForestGreen,

src/Models/CommitLink.cs

@@ -5,8 +5,8 @@ namespace SourceGit.Models
 {
     public class CommitLink
     {
-        public string Name { get; set; } = null;
-        public string URLPrefix { get; set; } = null;
+        public string Name { get; set; }
+        public string URLPrefix { get; set; }
 
         public CommitLink(string name, string prefix)
         {

src/Models/Count.cs

@@ -4,7 +4,7 @@ namespace SourceGit.Models
 {
     public class Count : IDisposable
     {
-        public int Value { get; set; } = 0;
+        public int Value { get; set; }
 
         public Count(int value)
         {

src/Models/CustomAction.cs

@@ -55,7 +55,7 @@ public bool BoolValue
         private string _label = string.Empty;
         private string _description = string.Empty;
         private string _stringValue = string.Empty;
-        private bool _boolValue = false;
+        private bool _boolValue;
     }
 
     public class CustomAction : ObservableObject

src/Models/DateTimeFormat.cs

@@ -23,7 +23,7 @@ public static int ActiveIndex
         {
             get;
             set;
-        } = 0;
+        }
 
         public static DateTimeFormat Active
         {

src/Models/DiffOption.cs

@@ -112,8 +112,8 @@ public override string ToString()
             return builder.ToString();
         }
 
-        private readonly Change _workingCopyChange = null;
-        private readonly bool _isUnstaged = false;
+        private readonly Change _workingCopyChange;
+        private readonly bool _isUnstaged;
         private readonly string _path;
         private readonly string _orgPath = string.Empty;
         private readonly string _extra = string.Empty;

src/Models/DiffResult.cs

@@ -26,10 +26,10 @@ public class TextDiffLine
     {
         public TextDiffLineType Type { get; set; } = TextDiffLineType.None;
         public string Content { get; set; } = "";
-        public int OldLineNumber { get; set; } = 0;
-        public int NewLineNumber { get; set; } = 0;
+        public int OldLineNumber { get; set; }
+        public int NewLineNumber { get; set; }
         public List<TextInlineRange> Highlights { get; set; } = new List<TextInlineRange>();
-        public bool NoNewLineEndOfFile { get; set; } = false;
+        public bool NoNewLineEndOfFile { get; set; }
 
         public string OldLine => OldLineNumber == 0 ? string.Empty : OldLineNumber.ToString();
         public string NewLine => NewLineNumber == 0 ? string.Empty : NewLineNumber.ToString();
@@ -46,12 +46,12 @@ public TextDiffLine(TextDiffLineType type, string content, int oldLine, int newL
 
     public class TextDiffSelection
     {
-        public int StartLine { get; set; } = 0;
-        public int EndLine { get; set; } = 0;
-        public bool HasChanges { get; set; } = false;
-        public bool HasLeftChanges { get; set; } = false;
-        public int IgnoredAdds { get; set; } = 0;
-        public int IgnoredDeletes { get; set; } = 0;
+        public int StartLine { get; set; }
+        public int EndLine { get; set; }
+        public bool HasChanges { get; set; }
+        public bool HasLeftChanges { get; set; }
+        public int IgnoredAdds { get; set; }
+        public int IgnoredDeletes { get; set; }
 
         public bool IsInRange(int idx)
         {
@@ -66,8 +66,8 @@ public partial class TextDiff
         public Vector ScrollOffset { get; set; } = Vector.Zero;
         public int MaxLineNumber = 0;
 
-        public string Repo { get; set; } = null;
-        public DiffOption Option { get; set; } = null;
+        public string Repo { get; set; }
+        public DiffOption Option { get; set; }
 
         public TextDiffSelection MakeSelection(int startLine, int endLine, bool isCombined, bool isOldSide)
         {
@@ -612,17 +612,17 @@ public class LFSDiff
 
     public class BinaryDiff
     {
-        public long OldSize { get; set; } = 0;
-        public long NewSize { get; set; } = 0;
+        public long OldSize { get; set; }
+        public long NewSize { get; set; }
     }
 
     public class ImageDiff
     {
-        public Bitmap Old { get; set; } = null;
-        public Bitmap New { get; set; } = null;
+        public Bitmap Old { get; set; }
+        public Bitmap New { get; set; }
 
-        public long OldFileSize { get; set; } = 0;
-        public long NewFileSize { get; set; } = 0;
+        public long OldFileSize { get; set; }
+        public long NewFileSize { get; set; }
 
         public string OldImageSize => Old != null ? $"{Old.PixelSize.Width} x {Old.PixelSize.Height}" : "0 x 0";
         public string NewImageSize => New != null ? $"{New.PixelSize.Width} x {New.PixelSize.Height}" : "0 x 0";
@@ -632,20 +632,20 @@ public class NoOrEOLChange;
 
     public class SubmoduleDiff
     {
-        public RevisionSubmodule Old { get; set; } = null;
-        public RevisionSubmodule New { get; set; } = null;
+        public RevisionSubmodule Old { get; set; }
+        public RevisionSubmodule New { get; set; }
     }
 
     public class DiffResult
     {
-        public bool IsBinary { get; set; } = false;
-        public bool IsLFS { get; set; } = false;
+        public bool IsBinary { get; set; }
+        public bool IsLFS { get; set; }
         public string OldHash { get; set; } = string.Empty;
         public string NewHash { get; set; } = string.Empty;
         public string OldMode { get; set; } = string.Empty;
         public string NewMode { get; set; } = string.Empty;
-        public TextDiff TextDiff { get; set; } = null;
-        public LFSDiff LFSDiff { get; set; } = null;
+        public TextDiff TextDiff { get; set; }
+        public LFSDiff LFSDiff { get; set; }
 
         public string FileModeChange
         {

src/Models/ExternalTool.cs

@@ -13,7 +13,7 @@ namespace SourceGit.Models
     public class ExternalTool
     {
         public string Name { get; private set; }
-        public Bitmap IconImage { get; private set; } = null;
+        public Bitmap IconImage { get; private set; }
 
         public ExternalTool(string name, string icon, string execFile, Func<string, string> execArgsGenerator = null)
         {
@@ -44,14 +44,14 @@ public void Open(string repo)
             });
         }
 
-        private string _execFile = string.Empty;
-        private Func<string, string> _execArgsGenerator = null;
+        private readonly string _execFile = string.Empty;
+        private readonly Func<string, string> _execArgsGenerator;
     }
 
     public class JetBrainsState
     {
         [JsonPropertyName("version")]
-        public int Version { get; set; } = 0;
+        public int Version { get; set; }
         [JsonPropertyName("appVersion")]
         public string AppVersion { get; set; } = string.Empty;
         [JsonPropertyName("tools")]
@@ -184,6 +184,6 @@ public void FindJetBrainsFromToolbox(Func<string> platformFinder)
             }
         }
 
-        private ExternalToolPaths _customPaths = null;
+        private readonly ExternalToolPaths _customPaths;
     }
 }

src/Models/IpcChannel.cs

@@ -93,8 +93,8 @@ private async void StartServer()
             }
         }
 
-        private FileStream _singletonLock = null;
-        private NamedPipeServerStream _server = null;
-        private CancellationTokenSource _cancellationTokenSource = null;
+        private readonly FileStream _singletonLock;
+        private readonly NamedPipeServerStream _server;
+        private readonly CancellationTokenSource _cancellationTokenSource;
     }
 }