Fix config info lookup

Author: kojix2

lib/youplot/parser.rb

@@ -228,6 +228,8 @@ def show_main_help(out = $stdout)
     end
 
     def show_config_info
+      ensure_config_loaded
+
       if @config_file
         puts "config file : #{@config_file}"
         puts config.inspect
@@ -245,6 +247,15 @@ def show_config_info
       exit if YouPlot.run_as_executable?
     end
 
+    def ensure_config_loaded
+      apply_config_file unless config
+    rescue StandardError => e
+      raise unless YouPlot.run_as_executable?
+
+      warn "YouPlot: #{e.message}"
+      exit 1
+    end
+
     def sub_parser_add_symbol
       sub_parser.on_head('--symbol STR', String, 'character to be used to plot the bars') do |v|
         params.symbol = v

test/youplot/parser_test.rb

@@ -97,6 +97,23 @@ def with_stdout(stdout)
     end
   end
 
+  test :show_config_info_finds_default_config_file do
+    Dir.mktmpdir do |dir|
+      Dir.chdir(dir) do
+        File.write('.youplot.yml', "width: 42\n")
+
+        parser = YouPlot::Parser.new
+        output = capture_stdout do
+          parser.show_config_info
+        end
+
+        assert_include output, 'config file : '
+        assert_include output, '.youplot.yml'
+        assert_match(/"width"\s*=>\s*42/, output)
+      end
+    end
+  end
+
   test :config_hyphen_output_uses_stdout do
     stdout = StringIO.new