refactor: remove unnecessary git_libgit2_init()

lib/src/blob.dart

@@ -6,16 +6,13 @@ import 'git_types.dart';
 import 'patch.dart';
 import 'oid.dart';
 import 'repository.dart';
-import 'util.dart';
 
 class Blob {
   /// Initializes a new instance of [Blob] class from provided pointer to
   /// blob object in memory.
   ///
   /// Should be freed with `free()` to release allocated memory.
-  Blob(this._blobPointer) {
+  Blob(this._blobPointer);
-    libgit2.git_libgit2_init();
-  }
 
   /// Initializes a new instance of [Blob] class from provided
   /// [Repository] object and [sha] hex string.

lib/src/commit.dart

@@ -6,16 +6,13 @@ import 'repository.dart';
 import 'oid.dart';
 import 'signature.dart';
 import 'tree.dart';
-import 'util.dart';
 
 class Commit {
   /// Initializes a new instance of [Commit] class from provided pointer to
   /// commit object in memory.
   ///
   /// Should be freed with `free()` to release allocated memory.
-  Commit(this._commitPointer) {
+  Commit(this._commitPointer);
-    libgit2.git_libgit2_init();
-  }
 
   /// Initializes a new instance of [Commit] class from provided [Repository] object
   /// and [sha] hex string.

lib/src/config.dart

@@ -12,9 +12,7 @@ class Config with IterableMixin<ConfigEntry> {
   /// pointer to config object in memory.
   ///
   /// Should be freed with `free()` to release allocated memory.
-  Config(this._configPointer) {
+  Config(this._configPointer);
-    libgit2.git_libgit2_init();
-  }
 
   /// Initializes a new instance of [Config] class from provided [path].
   ///

lib/src/diff.dart

@@ -13,9 +13,7 @@ class Diff {
   /// pointer to diff object in memory.
   ///
   /// Should be freed with `free()` to release allocated memory.
-  Diff(this._diffPointer) {
+  Diff(this._diffPointer);
-    libgit2.git_libgit2_init();
-  }
 
   Diff.parse(String content) {
     libgit2.git_libgit2_init();

lib/src/patch.dart

@@ -5,6 +5,7 @@ import 'bindings/patch.dart' as bindings;
 import 'blob.dart';
 import 'diff.dart';
 import 'git_types.dart';
+import 'util.dart';
 
 class Patch {
   /// Initializes a new instance of [Patch] class from provided
@@ -30,6 +31,8 @@ class Patch {
     int contextLines = 3,
     int interhunkLines = 0,
   }) {
+    libgit2.git_libgit2_init();
+
     final int flagsInt =
         flags.fold(0, (previousValue, e) => previousValue | e.value);
     var result = <String, dynamic>{};
@@ -83,6 +86,8 @@ class Patch {
   ///
   /// Throws a [LibGit2Error] if error occured.
   Patch.fromDiff(Diff diff, int index) {
+    libgit2.git_libgit2_init();
+
     _patchPointer = bindings.fromDiff(diff.pointer, index);
   }