remove exit in lib/aozora2html; use exit in bin/aozora2html

.rubocop.yml

@@ -77,6 +77,9 @@ Layout/LineLength:
 Lint/EmptyClass:
   AllowComments: true
 
+Lint/InheritException:
+  Enabled: false
+
 Metrics/AbcSize:
   Enabled: true
   Max: 260.05

bin/aozora2html

@@ -72,4 +72,6 @@ Dir.mktmpdir do |dir|
     output = File.read(dest_file)
     print output
   end
+rescue Aozora2Html::FatalError
+  exit(2)
 end

lib/aozora2html.rb

@@ -194,7 +194,7 @@ def process
     rescue Aozora2Html::Error => e
       puts e.message(line_number)
       if e.is_a?(Aozora2Html::Error)
-        exit(2)
+        raise Aozora2Html::FatalError
       end
     end
     tail_output # final call

lib/aozora2html/error.rb

@@ -14,4 +14,8 @@ def message(line = 0)
       I18n.t(:error_stop, line, @message)
     end
   end
+
+  # Aozora2Htmlクラス内でexitする代わりに例外をあげるためのfatal error用クラス
+  class FatalError < Exception
+  end
 end

lib/jstream.rb

@@ -30,7 +30,7 @@ def initialize(file_io)
     rescue Aozora2Html::Error => e
       puts e.message(1)
       if e.is_a?(Aozora2Html::Error)
-        exit(2)
+        raise Aozora2Html::FatalError
       end
     ensure
       @file.rewind

test/test_jstream.rb

@@ -12,7 +12,7 @@ def test_new_error
     orig_stdout = $stdout
     out = StringIO.new
     $stdout = out
-    assert_raises(SystemExit) do
+    assert_raises(Aozora2Html::FatalError) do
       Jstream.new(strio)
     end
     $stdout = orig_stdout