move version getter into separate class

bin/setup.dart

@@ -2,6 +2,8 @@ import 'dart:io';
 
 import 'package:args/command_runner.dart';
 import 'package:cli_util/cli_logging.dart' show Ansi, Logger;
+import 'package:libgit2dart/libgit2dart.dart';
+import 'package:libgit2dart/src/libgit2.dart';
 import 'package:libgit2dart/src/util.dart';
 import 'package:path/path.dart' as path;
 import 'package:pub_cache/pub_cache.dart';
@@ -21,7 +23,7 @@ Future<void> copyLibrary(String platform) async {
   final ansi = Ansi(Ansi.terminalSupportsAnsi);
 
   if (libgit2IsPresent(platform)) {
-    if (libgit2Version == getVersionNumber()) {
+    if (libgit2Version == Libgit2.version) {
       logger.stdout('${ansi.green}libgit2 for $platform is already available.');
     } else {
       logger.stdout(

lib/libgit2dart.dart

@@ -7,9 +7,9 @@ export 'src/config.dart';
 export 'src/credentials.dart';
 export 'src/diff.dart';
 export 'src/error.dart';
-export 'src/features.dart';
 export 'src/git_types.dart';
 export 'src/index.dart';
+export 'src/libgit2.dart';
 export 'src/mailmap.dart';
 export 'src/note.dart';
 export 'src/odb.dart';

lib/src/features.dart

@@ -1,13 +0,0 @@
-import 'package:libgit2dart/libgit2dart.dart';
-import 'package:libgit2dart/src/util.dart';
-
-class Features {
-  /// Returns list of compile time options for libgit2.
-  static Set<GitFeature> get list {
-    libgit2.git_libgit2_init();
-    final featuresInt = libgit2.git_libgit2_features();
-    return GitFeature.values
-        .where((e) => featuresInt & e.value == e.value)
-        .toSet();
-  }
-}

lib/src/libgit2.dart

@@ -0,0 +1,34 @@
+import 'dart:ffi';
+
+import 'package:ffi/ffi.dart';
+import 'package:libgit2dart/libgit2dart.dart';
+import 'package:libgit2dart/src/util.dart';
+
+class Libgit2 {
+  /// Returns libgit2 version number.
+  static String get version {
+    libgit2.git_libgit2_init();
+
+    final major = calloc<Int32>();
+    final minor = calloc<Int32>();
+    final rev = calloc<Int32>();
+    libgit2.git_libgit2_version(major, minor, rev);
+
+    final version = '${major.value}.${minor.value}.${rev.value}';
+
+    calloc.free(major);
+    calloc.free(minor);
+    calloc.free(rev);
+
+    return version;
+  }
+
+  /// Returns list of options libgit2 was compiled with.
+  static Set<GitFeature> get features {
+    libgit2.git_libgit2_init();
+    final featuresInt = libgit2.git_libgit2_features();
+    return GitFeature.values
+        .where((e) => featuresInt & e.value == e.value)
+        .toSet();
+  }
+}

lib/src/util.dart

@@ -4,7 +4,6 @@ import 'dart:ffi';
 import 'dart:io';
 
 import 'package:cli_util/cli_logging.dart' show Ansi, Logger;
-import 'package:ffi/ffi.dart';
 import 'package:libgit2dart/src/bindings/libgit2_bindings.dart';
 import 'package:path/path.dart' as path;
 import 'package:pub_cache/pub_cache.dart';
@@ -89,23 +88,6 @@ DynamicLibrary loadLibrary(String name) {
 
 final libgit2 = Libgit2(loadLibrary(getLibName()));
 
-String getVersionNumber() {
-  libgit2.git_libgit2_init();
-
-  final major = calloc<Int32>();
-  final minor = calloc<Int32>();
-  final rev = calloc<Int32>();
-  libgit2.git_libgit2_version(major, minor, rev);
-
-  final version = '${major.value}.${minor.value}.${rev.value}';
-
-  calloc.free(major);
-  calloc.free(minor);
-  calloc.free(rev);
-
-  return version;
-}
-
 bool isValidShaHex(String str) {
   final hexRegExp = RegExp(r'^[0-9a-fA-F]+$');
   return hexRegExp.hasMatch(str) &&

test/features_test.dart

@@ -1,13 +0,0 @@
-import 'package:libgit2dart/libgit2dart.dart';
-import 'package:test/test.dart';
-
-void main() {
-  group('Features', () {
-    test('returns list of compile time options for libgit2', () {
-      expect(
-        Features.list,
-        {GitFeature.threads, GitFeature.https, GitFeature.ssh, GitFeature.nsec},
-      );
-    });
-  });
-}

test/libgit2_test.dart

@@ -0,0 +1,19 @@
+import 'package:libgit2dart/libgit2dart.dart';
+import 'package:libgit2dart/src/libgit2.dart';
+import 'package:libgit2dart/src/util.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('Libgit2', () {
+    test('returns up to date version of libgit2', () {
+      expect(Libgit2.version, libgit2Version);
+    });
+
+    test('returns list of options libgit2 was compiled with', () {
+      expect(
+        Libgit2.features,
+        {GitFeature.threads, GitFeature.https, GitFeature.ssh, GitFeature.nsec},
+      );
+    });
+  });
+}