add link to license msg

Author: php-coder

Dangerfile

@@ -104,8 +104,15 @@ else
 			errors_count += 1
 			line.sub!('[WARNING] ', '')
 			line.sub!(pwd, '')
-			# TODO: extract file name
-			fail("license error: #{line}")
+			if line =~ /Missing header in: .*/
+				parsed = line.match(/(?<msg>[^:]+) in: (?<file>.*)/)
+				msg    = parsed['msg']
+				file   = parsed['file']
+				file   = github.html_link("#{file}#L1")
+				fail("license error in #{file}: #{msg}")
+			else
+				fail("license error: #{line}")
+			end
 		end
 	print_errors_summary 'license plugin', errors_count, 'https://github.com/php-coder/mystamps/wiki/check-license-header'
 end