feat(repository): add extended options to repository init

lib/src/bindings/repository.dart

@@ -71,13 +71,55 @@ String discover(String startPath, String ceilingDirs) {
 /// Creates a new Git repository in the given folder.
 ///
 /// Throws a [LibGit2Error] if error occured.
-Pointer<git_repository> init(String path, bool isBare) {
+Pointer<git_repository> init(
+  String path,
+  int flags,
+  int mode,
+  String workdirPath,
+  String description,
+  String templatePath,
+  String initialHead,
+  String originUrl,
+) {
   final out = calloc<Pointer<git_repository>>();
   final pathC = path.toNativeUtf8().cast<Int8>();
-  final isBareC = isBare ? 1 : 0;
-  final error = libgit2.git_repository_init(out, pathC, isBareC);
+  final workdirPathC =
+      workdirPath.isEmpty ? nullptr : workdirPath.toNativeUtf8().cast<Int8>();
+  final descriptionC =
+      description.isEmpty ? nullptr : description.toNativeUtf8().cast<Int8>();
+  final templatePathC =
+      templatePath.isEmpty ? nullptr : templatePath.toNativeUtf8().cast<Int8>();
+  final initialHeadC =
+      initialHead.isEmpty ? nullptr : initialHead.toNativeUtf8().cast<Int8>();
+  final originUrlC =
+      originUrl.isEmpty ? nullptr : originUrl.toNativeUtf8().cast<Int8>();
+  final opts = calloc<git_repository_init_options>();
+  final optsError = libgit2.git_repository_init_options_init(
+    opts,
+    GIT_REPOSITORY_INIT_OPTIONS_VERSION,
+  );
+
+  if (optsError < 0) {
+    throw LibGit2Error(libgit2.git_error_last());
+  }
+
+  opts.ref.flags = flags;
+  opts.ref.mode = mode;
+  opts.ref.workdir_path = workdirPathC;
+  opts.ref.description = descriptionC;
+  opts.ref.template_path = templatePathC;
+  opts.ref.initial_head = initialHeadC;
+  opts.ref.origin_url = originUrlC;
+
+  final error = libgit2.git_repository_init_ext(out, pathC, opts);
 
   calloc.free(pathC);
+  calloc.free(workdirPathC);
+  calloc.free(descriptionC);
+  calloc.free(templatePathC);
+  calloc.free(initialHeadC);
+  calloc.free(originUrlC);
+  calloc.free(opts);
 
   if (error < 0) {
     throw LibGit2Error(libgit2.git_error_last());
@@ -98,6 +140,9 @@ Pointer<git_repository> clone(
   final out = calloc<Pointer<git_repository>>();
   final urlC = url.toNativeUtf8().cast<Int8>();
   final localPathC = localPath.toNativeUtf8().cast<Int8>();
+  final checkoutBranchC = checkoutBranch.isEmpty
+      ? nullptr
+      : checkoutBranch.toNativeUtf8().cast<Int8>();
   final cloneOptions = calloc<git_clone_options>();
   final cloneOptionsError =
       libgit2.git_clone_options_init(cloneOptions, GIT_CLONE_OPTIONS_VERSION);
@@ -115,16 +160,16 @@ Pointer<git_repository> clone(
   }
 
   cloneOptions.ref.bare = bare ? 1 : 0;
-  cloneOptions.ref.checkout_branch = checkoutBranch.isEmpty
-      ? nullptr
-      : checkoutBranch.toNativeUtf8().cast<Int8>();
+  cloneOptions.ref.checkout_branch = checkoutBranchC;
   cloneOptions.ref.fetch_opts = fetchOptions.ref;
 
   final error = libgit2.git_clone(out, urlC, localPathC, cloneOptions);
 
   calloc.free(urlC);
   calloc.free(localPathC);
+  calloc.free(checkoutBranchC);
   calloc.free(cloneOptions);
+  calloc.free(fetchOptions);
 
   if (error < 0) {
     throw LibGit2Error(libgit2.git_error_last());

lib/src/git_types.dart

@@ -1215,3 +1215,57 @@ class GitFetchPrune {
   @override
   String toString() => 'GitFetchPrune.$_name';
 }
+
+/// Option flags for [Repository] init.
+class GitRepositoryInit {
+  const GitRepositoryInit._(this._value, this._name);
+  final int _value;
+  final String _name;
+
+  /// Create a bare repository with no working directory.
+  static const bare = GitRepositoryInit._(1, 'bare');
+
+  /// Return an GIT_EEXISTS error if the repo path appears to already be
+  /// an git repository.
+  static const noReinit = GitRepositoryInit._(2, 'noReinit');
+
+  /// Normally a "/.git/" will be appended to the repo path for
+  /// non-bare repos (if it is not already there), but passing this flag
+  /// prevents that behavior.
+  static const noDotGitDir = GitRepositoryInit._(4, 'noDotGitDir');
+
+  /// Make the repo path (and workdir path) as needed. Init is always willing
+  /// to create the ".git" directory even without this flag. This flag tells
+  /// init to create the trailing component of the repo and workdir paths
+  /// as needed.
+  static const mkdir = GitRepositoryInit._(8, 'mkdir');
+
+  /// Recursively make all components of the repo and workdir paths as
+  /// necessary.
+  static const mkpath = GitRepositoryInit._(16, 'mkpath');
+
+  /// libgit2 normally uses internal templates to initialize a new repo.
+  /// This flags enables external templates, looking the [templatePath] from
+  /// the options if set, or the `init.templatedir` global config if not,
+  /// or falling back on "/usr/share/git-core/templates" if it exists.
+  static const externalTemplate = GitRepositoryInit._(32, 'externalTemplate');
+
+  /// If an alternate workdir is specified, use relative paths for the gitdir
+  /// and core.worktree.
+  static const relativeGitlink = GitRepositoryInit._(64, 'relativeGitlink');
+
+  static const List<GitRepositoryInit> values = [
+    bare,
+    noReinit,
+    noDotGitDir,
+    mkdir,
+    mkpath,
+    externalTemplate,
+    relativeGitlink,
+  ];
+
+  int get value => _value;
+
+  @override
+  String toString() => 'GitRepositoryInit.$_name';
+}

lib/src/repository.dart

@@ -35,15 +35,40 @@ class Repository {
   Repository(this._repoPointer);
 
   /// Initializes a new instance of the [Repository] class by creating a new
-  /// Git repository in the given folder.
+  /// git repository in the given folder.
   ///
   /// Should be freed with `free()` to release allocated memory.
   ///
   /// Throws a [LibGit2Error] if error occured.
-  Repository.init(String path, {bool isBare = false}) {
+  Repository.init({
+    required String path,
+    bool bare = false,
+    Set<GitRepositoryInit> flags = const {GitRepositoryInit.mkpath},
+    int mode = 0,
+    String workdirPath = '',
+    String description = '',
+    String templatePath = '',
+    String initialHead = '',
+    String originUrl = '',
+  }) {
     libgit2.git_libgit2_init();
 
-    _repoPointer = bindings.init(path, isBare);
+    int flagsInt = flags.fold(0, (previousValue, e) => previousValue | e.value);
+
+    if (bare) {
+      flagsInt |= GitRepositoryInit.bare.value;
+    }
+
+    _repoPointer = bindings.init(
+      path,
+      flagsInt,
+      mode,
+      workdirPath,
+      description,
+      templatePath,
+      initialHead,
+      originUrl,
+    );
   }
 
   /// Initializes a new instance of the [Repository] class by opening repository