Exclude file pattern match

closes #61

spec/ameba/base_spec.cr

@@ -55,10 +55,10 @@ module Ameba::Rule
         rule.excluded?(Source.new "", "source.cr").should be_true
       end
 
-      pending "returns true if source matches the wildcard" do
+      it "returns true if source matches the wildcard" do
         rule = DummyRule.new
         rule.excluded = %w(**/*.cr)
-        rule.excluded?(Source.new "", "source.cr").should be_true
+        rule.excluded?(Source.new "", __FILE__).should be_true
       end
 
       it "returns false if source does not match the wildcard" do

spec/ameba/source_spec.cr

@@ -35,5 +35,17 @@ module Ameba
         s.fullpath.should_not be_nil
       end
     end
+
+    describe "#matches_path?" do
+      it "returns true if source's path is matched" do
+        s = Source.new "", "source.cr"
+        s.matches_path?("source.cr").should be_true
+      end
+
+      it "returns false if source's path is not matched" do
+        s = Source.new "", "source.cr"
+        s.matches_path?("new_source.cr").should be_false
+      end
+    end
   end
 end

src/ameba/rule/base.cr

@@ -75,8 +75,8 @@ module Ameba::Rule
     #
     def excluded?(source)
       excluded.try &.any? do |path|
-        # TODO: file pattern match
+        source.matches_path?(path) ||
-        source.path == path || source.fullpath == File.expand_path(path)
+          Dir.glob(path).any? { |glob| source.matches_path? glob }
       end
     end
 

src/ameba/source.cr

@@ -111,5 +111,10 @@ module Ameba
     def fullpath
       @fullpath ||= File.expand_path @path
     end
+
+    # Returns true if *filepath* matches the source's path, false if it does not.
+    def matches_path?(filepath)
+      path == filepath || path == File.expand_path(filepath)
+    end
   end
 end