fix rt command for 15 and 16; add shell.nix

.dockerignore

@@ -5,3 +5,4 @@ data
 docker-compose.yml
 docker-compose.yml.example
 Rakefile
+shell.nix

lib/lyricat/bot.rb

@@ -681,7 +681,7 @@ def b15 lang, session_token
 						s.concat "- #{song.name lang}\t#{Song.diff_name_in_game diff_id, lang}\n"
 					end
 					unless middle_result.empty?
-						middle_result = "**#{Song.diff_in_game_and_abbr_precise diff, lang}**\n" + middle_result
+						middle_result = "**#{Song.diff_in_game_and_abbr_precise diff, lang, special: nil}**\n" + middle_result
 						if result.length + middle_result.length + link.length + 1 > 2000
 							if event.channel.pm?
 								try_reply event.message, result

lib/lyricat/song.rb

@@ -155,7 +155,11 @@ class << self
 			attr_accessor :max_version
 
 			def diff_in_game_and_abbr_precise diff, lang = LANGS.first, special: false
-				in_game = (special ? DIFFS_SP_IN_GAME : DIFFS_IN_GAME)[diff.to_i][lang]
+				if special.nil?
+					in_game = [DIFFS_IN_GAME[diff.to_i], DIFFS_SP_IN_GAME[diff.to_i]].compact.map { _1[lang] }.join '/'
+				else
+					in_game = (special ? DIFFS_SP_IN_GAME : DIFFS_IN_GAME)[diff.to_i][lang]
+				end
 				in_game += DIFF_PLUS[lang] if diff % 1 > 0.5
 				"#{in_game}(.#{(diff % 1 * 10).round})"
 			end

shell.nix

@@ -0,0 +1,11 @@
+# currently not working: https://github.com/stackgl/headless-gl/issues/283
+{ pkgs ? import <nixpkgs> {} }: with pkgs; mkShell {
+	packages = [
+		opencc
+	];
+	shellHook = ''
+		export LD_LIBRARY_PATH=${lib.makeLibraryPath [
+			opencc
+		]}
+	'';
+}