Add non ASCII encoding schema support to RailsSchemaUpToDate hook

Author: ttrmw

lib/overcommit/hook/pre_commit/rails_schema_up_to_date.rb

@@ -34,6 +34,10 @@ def run # rubocop:disable Metrics/CyclomaticComplexity, Metrics/PerceivedComplex
 
     private
 
+    def encoding
+      { encoding: @config['encoding'] }.compact
+    end
+
     def migration_files
       @migration_files ||= applicable_files.select do |file|
         file.match %r{db/migrate/.*\.rb}
@@ -47,7 +51,7 @@ def schema_files
     end
 
     def schema
-      @schema ||= schema_files.map { |file| File.read(file) }.join
+      @schema ||= schema_files.map { |file| File.read(file, encoding) }.join
       @schema.tr('_', '')
     end
 

spec/overcommit/hook/pre_commit/rails_schema_up_to_date_spec.rb

@@ -70,6 +70,33 @@
     end
 
     it { should fail_hook }
+
+    context 'when non ASCII encoding is required' do
+      let!(:config) do
+        super().merge(Overcommit::Configuration.new(
+                        'PreCommit' => {
+                          'RailsSchemaUpToDate' => {
+                            'encoding' => 'utf-8'
+                          }
+                        }
+                      ))
+      end
+
+      before do
+        subject.stub(:applicable_files).and_return([sql_schema_file])
+      end
+
+      around do |example|
+        repo do
+          FileUtils.mkdir_p('db/migrate')
+          File.open(sql_schema_file, 'w') { |f| f.write("version: 12345678901234\nVALUES ('字')") }
+          `git add #{sql_schema_file}`
+          example.run
+        end
+      end
+
+      it { should fail_hook }
+    end
   end
 
   context 'when a Ruby schema file with the latest version and migrations are added' do