feat(config): add ability to get value of variable

lib/src/bindings/config.dart

@@ -120,16 +120,12 @@ String findXdg() {
 
 /// Get the value of a config variable.
 ///
-/// All config files will be looked into, in the order of their
-/// defined level. A higher level means a higher priority. The
-/// first occurrence of the variable will be returned here.
-///
 /// Throws a [LibGit2Error] if error occured.
-Pointer<Int8> getConfigValue(Pointer<git_config> cfg, String variable) {
+String getValue(Pointer<git_config> cfg, String variable) {
-  final out = calloc<git_buf>();
+  final out = calloc<Pointer<git_config_entry>>();
   final name = variable.toNativeUtf8().cast<Int8>();
-  final error = libgit2.git_config_get_path(out, cfg, name);
+  final error = libgit2.git_config_get_entry(out, cfg, name);
-  final value = out.ref.ptr;
+  final value = out.value;
   calloc.free(out);
   calloc.free(name);
 
@@ -137,36 +133,7 @@ Pointer<Int8> getConfigValue(Pointer<git_config> cfg, String variable) {
     throw LibGit2Error(libgit2.git_error_last());
   }
 
-  return value;
+  return value.ref.value.cast<Utf8>().toDartString();
-}
-
-/// Get the value of a config variable and parse it as a boolean according
-/// to git-config rules.
-///
-/// Interprets "true", "yes", "on", 1, or any non-zero number as true.
-/// Interprets "false", "no", "off", 0, or an empty string as false.
-bool getBool(Pointer<git_config> cfg, String variable) {
-  final value = getConfigValue(cfg, variable);
-  final out = calloc<Int32>();
-  libgit2.git_config_parse_bool(out, value);
-  final result = out.value;
-  calloc.free(out);
-
-  return (result == 0) ? false : true;
-}
-
-/// Get the value of a config variable and parse it as an integer according
-/// to git-config rules.
-///
-/// Handles suffixes like k, M, or G - kilo, mega, giga.
-int getInt(Pointer<git_config> cfg, String variable) {
-  final value = getConfigValue(cfg, variable);
-  final out = calloc<Int64>();
-  libgit2.git_config_parse_int64(out, value);
-  final result = out.value;
-  calloc.free(out);
-
-  return result;
 }
 
 /// Set the value of a boolean config variable in the config file with the

lib/src/config.dart

@@ -113,15 +113,24 @@ class Config {
   /// Map of key/value entries from config file.
   Map<String, dynamic> variables = {};
 
-  /// Sets the [value] of config [key]
+  /// Returns the value of config [variable]
-  void setVariable(String key, dynamic value) {
+  String getValue(String variable) {
+    try {
+      return config.getValue(configPointer.value, variable);
+    } catch (e) {
+      rethrow;
+    }
+  }
+
+  /// Sets the [value] of config [variable]
+  void setValue(String variable, dynamic value) {
     try {
       if (value.runtimeType == bool) {
-        config.setBool(configPointer.value, key, value);
+        config.setBool(configPointer.value, variable, value);
       } else if (value.runtimeType == int) {
-        config.setInt(configPointer.value, key, value);
+        config.setInt(configPointer.value, variable, value);
       } else {
-        config.setString(configPointer.value, key, value);
+        config.setString(configPointer.value, variable, value);
       }
       variables = config.getVariables(configPointer.value);
     } catch (e) {

test/config_test.dart

@@ -43,23 +43,34 @@ void main() {
       expect(config, isA<Config>());
     });
 
-    test('gets entries of file', () {
+    group('getValue()', () {
-      expect(config.variables['core.repositoryformatversion'], equals('0'));
+      test('returns value of variable', () {
+        expect(config.getValue('core.bare'), equals('false'));
+      });
+
+      test('throws when variable isn\'t found', () {
+        expect(
+          () => config.getValue('not.there'),
+          throwsA(isA<LibGit2Error>()),
+        );
+      });
     });
 
-    test('sets boolean value for provided key', () {
+    group('setValue()', () {
-      config.setVariable('core.bare', true);
+      test('sets boolean value for provided variable', () {
-      expect(config.variables['core.bare'], equals('true'));
+        config.setValue('core.bare', true);
-    });
+        expect(config.variables['core.bare'], equals('true'));
+      });
 
-    test('sets integer value for provided key', () {
+      test('sets integer value for provided variable', () {
-      config.setVariable('core.repositoryformatversion', 1);
+        config.setValue('core.repositoryformatversion', 1);
-      expect(config.variables['core.repositoryformatversion'], equals('1'));
+        expect(config.variables['core.repositoryformatversion'], equals('1'));
-    });
+      });
 
-    test('sets string value for provided key', () {
+      test('sets string value for provided variable', () {
-      config.setVariable('remote.origin.url', 'updated');
+        config.setValue('remote.origin.url', 'updated');
-      expect(config.variables['remote.origin.url'], equals('updated'));
+        expect(config.variables['remote.origin.url'], equals('updated'));
+      });
     });
 
     test('deletes variable', () {