Merge pull request #2551 from KaiHa/kaiha/libreadline_option

repl: give user the choice between libeditline and libreadline

src/nix/repl.cc

@@ -5,7 +5,12 @@
 
 #include <setjmp.h>
 
+#ifdef READLINE
+#include <readline/history.h>
+#include <readline/readline.h>
+#else
 #include <editline.h>
+#endif
 
 #include "shared.hh"
 #include "eval.hh"
@@ -202,13 +207,15 @@ void NixRepl::mainLoop(const std::vector<std::string> & files)
     // Allow nix-repl specific settings in .inputrc
     rl_readline_name = "nix-repl";
     createDirs(dirOf(historyFile));
+#ifndef READLINE
     el_hist_size = 1000;
+#endif
     read_history(historyFile.c_str());
-    // rl_initialize();
-    // linenoiseSetCompletionCallback(completionCallback);
     curRepl = this;
+#ifndef READLINE
     rl_set_complete_func(completionCallback);
     rl_set_list_possib_func(listPossibleCallback);
+#endif
 
     std::string input;