feat: upgrade libgit2 to 1.4.0 (#45)

lib/src/bindings/packbuilder.dart

@@ -143,12 +143,13 @@ int writtenCount(Pointer<git_packbuilder> pb) {
   return libgit2.git_packbuilder_written(pb);
 }
 
-/// Get the packfile's hash.
+/// Get the unique name for the resulting packfile.
 ///
-/// A packfile's name is derived from the sorted hashing of all object names.
-/// This is only correct after the packfile has been written.
-Pointer<git_oid> hash(Pointer<git_packbuilder> pb) {
-  return libgit2.git_packbuilder_hash(pb);
+/// The packfile's name is derived from the packfile's content. This is only
+/// correct after the packfile has been written.
+String name(Pointer<git_packbuilder> pb) {
+  final result = libgit2.git_packbuilder_name(pb);
+  return result == nullptr ? '' : result.cast<Utf8>().toDartString();
 }
 
 /// Set number of threads to spawn.

lib/src/git_types.dart

@@ -447,6 +447,14 @@ class GitMergeFileFlag {
   /// Take extra time to find minimal diff.
   static const diffMinimal = GitMergeFileFlag._(128, 'diffMinimal');
 
+  /// Create zdiff3 ("zealous diff3")-style files.
+  static const styleZdiff3 = GitMergeFileFlag._(256, 'styleZdiff3');
+
+  /// Do not produce file conflicts when common regions have
+  /// changed; keep the conflict markers in the file and accept
+  /// that as the merge result.
+  static const acceptConflicts = GitMergeFileFlag._(512, 'acceptConflicts');
+
   static const List<GitMergeFileFlag> values = [
     defaults,
     styleMerge,
@@ -457,6 +465,8 @@ class GitMergeFileFlag {
     ignoreWhitespaceEOL,
     diffPatience,
     diffMinimal,
+    styleZdiff3,
+    acceptConflicts,
   ];
 
   int get value => _value;
@@ -554,6 +564,10 @@ class GitCheckout {
   /// notifications; don't update the working directory or index.
   static const dryRun = GitCheckout._(16777216, 'dryRun');
 
+  /// Include common ancestor data in zdiff3 format for conflicts.
+  static const conflictStyleZdiff3 =
+      GitCheckout._(33554432, 'conflictStyleZdiff3');
+
   static const List<GitCheckout> values = [
     none,
     safe,
@@ -575,7 +589,8 @@ class GitCheckout {
     conflictStyleDiff3,
     dontRemoveExisting,
     dontWriteIndex,
-    dryRun
+    dryRun,
+    conflictStyleZdiff3,
   ];
 
   int get value => _value;

lib/src/packbuilder.dart

@@ -90,11 +90,11 @@ class PackBuilder {
   /// Number of objects the packbuilder has already written out.
   int get writtenLength => bindings.writtenCount(_packbuilderPointer);
 
-  /// Packfile's hash.
+  /// Unique name for the resulting packfile.
   ///
-  /// A packfile's name is derived from the sorted hashing of all object names.
-  /// This is only correct after the packfile has been written.
-  Oid get hash => Oid(bindings.hash(_packbuilderPointer));
+  /// The packfile's name is derived from the packfile's content. This is only
+  /// correct after the packfile has been written.
+  String get name => bindings.name(_packbuilderPointer);
 
   /// Sets and returns the number of threads to spawn.
   ///

lib/src/util.dart

@@ -8,7 +8,7 @@ import 'package:libgit2dart/src/bindings/libgit2_bindings.dart';
 import 'package:path/path.dart' as path;
 import 'package:pub_cache/pub_cache.dart';
 
-const libgit2Version = '1.3.0';
+const libgit2Version = '1.4.0';
 final libDir = path.join('.dart_tool', 'libgit2');
 
 String getLibName() {