feat: support ignores commit message

README.md

@@ -30,9 +30,28 @@ dart pub add --dev commitlint_cli
 ### Configuration
 
 ```bash
-# Configure commitlint to use conventional config
+# Simply use configuration of a package
 echo "include: package:commitlint_cli/commitlint.yaml" > commitlint.yaml
 ```
+You can also customize your configuration in `commitlint.yaml`
+```yaml
+# Inherit configuration of a package
+include: package:commitlint_cli/commitlint.yaml
+
+# Custom rules
+rules:
+  type-case:
+    - 2
+    - always
+    - 'upper-case'
+
+# Whether commitlint uses the default ignore rules.
+defaultIgnores: true
+# Pattern that matches commit message if commitlint should ignore the given message.
+ignores:
+  - r'^fixup'
+```
+
 
 ### Test
 

lib/src/is_ignored.dart

@@ -0,0 +1,22 @@
+bool isIgnored(String message,
+    {bool? defaultIgnores, Iterable<String>? ignores}) {
+  final base = defaultIgnores == false ? [] : wildcards;
+  return [...base, ...?ignores?.map(ignore)].any((mathcer) => mathcer(message));
+}
+
+final wildcards = [
+  ignore(
+      r'((Merge pull request)|(Merge (.*?) into (.*?)|(Merge branch (.*?)))(?:\r?\n)*$)'),
+  ignore(r'(Merge tag (.*?))(?:\r?\n)*$'),
+  ignore(r'(R|r)evert (.*)'),
+  ignore(r'(fixup|squash)!'),
+  ignore(r'(Merged (.*?)(in|into) (.*)|Merged PR (.*): (.*))'),
+  ignore(r'Merge remote-tracking branch(\s*)(.*)'),
+  ignore(r'Automatic merge(.*)'),
+  ignore(r'Auto-merged (.*?) into (.*)'),
+];
+
+Matcher ignore(String pattern) =>
+    (String message) => RegExp(pattern).hasMatch(message);
+
+typedef Matcher = bool Function(String);

lib/src/lint.dart

@@ -1,3 +1,4 @@
+import 'is_ignored.dart';
 import 'parse.dart';
 import 'rules.dart';
 import 'types/commit.dart';
@@ -7,12 +8,18 @@ import 'types/rule.dart';
 ///
 /// Lint commit [message] with configured [rules]
 ///
-Future<LintOutcome> lint(String message, Map<String, RuleConfig> rules) async {
-  // Parse the commit message
+Future<LintOutcome> lint(String message, Map<String, Rule> rules,
+    {bool? defaultIgnores, Iterable<String>? ignores}) async {
+  /// Found a wildcard match, skip
+  if (isIgnored(message, defaultIgnores: defaultIgnores, ignores: ignores)) {
+    return LintOutcome(input: message, valid: true, errors: [], warnings: []);
+  }
+
+  /// Parse the commit message
   final commit = message.isEmpty ? Commit.empty() : parse(message);
 
   if (commit.header.isEmpty && commit.body == null && commit.footer == null) {
-    // Commit is empty, skip
+    /// Commit is empty, skip
     return LintOutcome(input: message, valid: true, errors: [], warnings: []);
   }
   final allRules = Map.of(supportedRules);
@@ -22,13 +29,13 @@ Future<LintOutcome> lint(String message, Map<String, RuleConfig> rules) async {
   if (missing.isNotEmpty) {
     final names = [...allRules.keys];
     throw RangeError(
-        'Found invalid rule names: ${missing.join(', ')}. Supported rule names are: ${names.join(', ')}');
+        'Found invalid rule names: ${missing.join(', ')}. \nSupported rule names are: ${names.join(', ')}');
   }
 
   /// Validate against all rules
   final results = rules.entries
       // Level 0 rules are ignored
-      .where((entry) => entry.value.severity != RuleConfigSeverity.ignore)
+      .where((entry) => entry.value.severity != RuleSeverity.ignore)
       .map((entry) {
         final name = entry.key;
         final config = entry.value;
@@ -49,9 +56,9 @@ Future<LintOutcome> lint(String message, Map<String, RuleConfig> rules) async {
       .where((outcome) => !outcome.valid)
       .toList();
   final errors =
-      results.where((element) => element.level == RuleConfigSeverity.error);
+      results.where((element) => element.level == RuleSeverity.error);
   final warnings =
-      results.where((element) => element.level == RuleConfigSeverity.warning);
+      results.where((element) => element.level == RuleSeverity.warning);
   return LintOutcome(
     input: message,
     valid: errors.isEmpty,

lib/src/load.dart

@@ -5,117 +5,114 @@ import 'package:path/path.dart';
 import 'package:yaml/yaml.dart';
 
 import 'types/case.dart';
+import 'types/commitlint.dart';
 import 'types/rule.dart';
 
 ///
-/// Load configured rules in given [file] from given [dir].
+/// Load configured rules in given [path] from given [directory].
 ///
-Future<Map<String, RuleConfig>> load({
-  required String file,
-  String? dir,
+Future<CommitLint> load(
+  String path, {
+  Directory? directory,
 }) async {
-  Map<String, RuleConfig> rules = {};
-  Uri? uri;
-  if (!file.startsWith('package:')) {
-    uri = toUri(join(dir ?? Directory.current.path, file));
-    dir = dirname(uri.path);
+  File? file;
+  if (!path.startsWith('package:')) {
+    final uri = toUri(join(directory?.path ?? Directory.current.path, path));
+    file = File.fromUri(uri);
   } else {
-    uri = await Isolate.resolvePackageUri(Uri.parse(file));
-    dir = uri?.path.split('/lib/').first;
+    final uri = await Isolate.resolvePackageUri(Uri.parse(path));
+    if (uri != null) {
+      file = File.fromUri(uri);
+    }
   }
-  if (uri != null) {
-    final file = File.fromUri(uri);
-    if (await file.exists()) {
-      final yaml = loadYaml(await file.readAsString());
-      final include = yaml?['include'] as String?;
-      final rulesMap = yaml?['rules'] as Map?;
-      if (rulesMap != null) {
-        for (var entry in rulesMap.entries) {
-          rules[entry.key] = _extractRuleConfig(entry.value);
-        }
-      }
-      if (include != null) {
-        final upstream = await load(dir: dir, file: include);
-        if (upstream.isNotEmpty) {
-          rules = {
-            ...upstream,
-            ...rules,
-          };
-        }
-      }
+  if (file != null && file.existsSync()) {
+    final yaml = loadYaml(await file.readAsString());
+    final include = yaml?['include'] as String?;
+    final rules = yaml?['rules'] as YamlMap?;
+    final ignores = yaml?['ignores'] as YamlList?;
+    final defaultIgnores = yaml?['defaultIgnores'] as bool?;
+    final config = CommitLint(
+        rules: rules?.map((key, value) => MapEntry(key, _extractRule(value))) ??
+            {},
+        ignores: ignores?.cast(),
+        defaultIgnores: defaultIgnores);
+    if (include != null) {
+      final upstream = await load(include, directory: file.parent);
+      return config.inherit(upstream);
     }
+    return config;
   }
-  return rules;
+  return CommitLint();
 }
 
-RuleConfig _extractRuleConfig(dynamic config) {
+Rule _extractRule(dynamic config) {
   if (config is! List) {
     throw Exception('rule config must be list, but get $config');
   }
   if (config.isEmpty || config.length < 2 || config.length > 3) {
     throw Exception(
         'rule config must contain at least two, at most three items.');
   }
-  final severity = _extractRuleConfigSeverity(config.first as int);
-  final condition = _extractRuleConfigCondition(config.elementAt(1) as String);
+  final severity = _extractRuleSeverity(config.first as int);
+  final condition = _extractRuleCondition(config.elementAt(1) as String);
   dynamic value;
   if (config.length == 3) {
     value = config.last;
   }
   if (value == null) {
-    return RuleConfig(severity: severity, condition: condition);
+    return Rule(severity: severity, condition: condition);
   }
   if (value is num) {
-    return LengthRuleConfig(
+    return LengthRule(
       severity: severity,
       condition: condition,
       length: value,
     );
   }
   if (value is String) {
     if (value.endsWith('-case')) {
-      return CaseRuleConfig(
+      return CaseRule(
         severity: severity,
         condition: condition,
         type: _extractCase(value),
       );
     } else {
-      return ValueRuleConfig(
+      return ValueRule(
         severity: severity,
         condition: condition,
         value: value,
       );
     }
   }
   if (value is List) {
-    return EnumRuleConfig(
+    return EnumRule(
       severity: severity,
       condition: condition,
       allowed: value.cast(),
     );
   }
-  return ValueRuleConfig(
+  return ValueRule(
     severity: severity,
     condition: condition,
     value: value,
   );
 }
 
-RuleConfigSeverity _extractRuleConfigSeverity(int severity) {
-  if (severity < 0 || severity > RuleConfigSeverity.values.length - 1) {
+RuleSeverity _extractRuleSeverity(int severity) {
+  if (severity < 0 || severity > RuleSeverity.values.length - 1) {
     throw Exception(
-        'rule severity can only be 0..${RuleConfigSeverity.values.length - 1}');
+        'rule severity can only be 0..${RuleSeverity.values.length - 1}');
   }
-  return RuleConfigSeverity.values[severity];
+  return RuleSeverity.values[severity];
 }
 
-RuleConfigCondition _extractRuleConfigCondition(String condition) {
-  var allowed = RuleConfigCondition.values.map((e) => e.name).toList();
+RuleCondition _extractRuleCondition(String condition) {
+  var allowed = RuleCondition.values.map((e) => e.name).toList();
   final index = allowed.indexOf(condition);
   if (index == -1) {
     throw Exception('rule condition can only one of $allowed');
   }
-  return RuleConfigCondition.values[index];
+  return RuleCondition.values[index];
 }
 
 Case _extractCase(String name) {