No longer deal with the log file at the preprocessor level

Ref. dynare#1743

src/DynareMain.cc

 /*
- * Copyright © 2003-2020 Dynare Team
+ * Copyright © 2003-2021 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -52,6 +52,9 @@ macroExpandModFile(const string &filename, const string &basename, const istream
 void
 usage()
 {
+  /* "nolog" is in the following output, even though it is not parsed by the
+     preprocessor but by dynare.m, so that users get the right list of options
+     if they call the preprocessor from MATLAB/Octave. */
   cerr << "Dynare usage: dynare mod_file [debug] [noclearall] [onlyclearglobals] [savemacro[=macro_file]] [onlymacro] [linemacro] [notmpterms] [nolog] [warn_uninit]"
        << " [console] [nograph] [nointeractive] [parallel[=cluster_name]] [conffile=parallel_config_path_and_filename] [parallel_slave_open_mode] [parallel_test]"
        << " [-D<variable>[=<value>]] [-I/path] [nostrict] [stochastic] [fast] [minimal_workspace] [compute_xrefs] [output=dynamic|first|second|third] [language=matlab|julia]"
@@ -132,7 +135,6 @@ main(int argc, char **argv)
   bool no_tmp_terms = false;
   bool only_macro = false;
   bool line_macro = false;
-  bool no_log = false;
   bool no_warn = false;
   int params_derivs_order = 2;
   bool warn_uninit = false;
@@ -210,8 +212,6 @@ main(int argc, char **argv)
         line_macro = true;
       else if (s == "notmpterms")
         no_tmp_terms = true;
-      else if (s == "nolog")
-        no_log = true;
       else if (s == "nowarn")
         no_warn = true;
       else if (s == "warn_uninit")
@@ -497,7 +497,7 @@ main(int argc, char **argv)
   if (output_mode != FileOutputType::none)
     mod_file->writeExternalFiles(basename, language);
   else
-    mod_file->writeOutputFiles(basename, clear_all, clear_global, no_log, no_warn, console, nograph,
+    mod_file->writeOutputFiles(basename, clear_all, clear_global, no_warn, console, nograph,
                                nointeractive, config_file, check_model_changes, minimal_workspace, compute_xrefs,
                                mexext, matlabroot, dynareroot, onlymodel, gui, notime);
 

src/ModFile.cc

 /*
- * Copyright © 2006-2020 Dynare Team
+ * Copyright © 2006-2021 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -839,7 +839,7 @@ ModFile::computingPass(bool no_tmp_terms, FileOutputType output, int params_deri
 }
 
 void
-ModFile::writeOutputFiles(const string &basename, bool clear_all, bool clear_global, bool no_log, bool no_warn,
+ModFile::writeOutputFiles(const string &basename, bool clear_all, bool clear_global, bool no_warn,
                           bool console, bool nograph, bool nointeractive, const ConfigFile &config_file,
                           bool check_model_changes, bool minimal_workspace, bool compute_xrefs,
                           const string &mexext,
@@ -928,10 +928,7 @@ ModFile::writeOutputFiles(const string &basename, bool clear_all, bool clear_glo
               << "%" << endl;
   if (!onlymodel)
     config_file.writeHooks(mOutputFile);
-  mOutputFile << "global_initialization;" << endl
-              << "diary off;" << endl;
-  if (!no_log)
-    mOutputFile << "diary('" << basename << ".log');" << endl;
+  mOutputFile << "global_initialization;" << endl;
 
   if (minimal_workspace)
     mOutputFile << "options_.minimal_workspace = true;" << endl;
@@ -1120,9 +1117,6 @@ ModFile::writeOutputFiles(const string &basename, bool clear_all, bool clear_glo
         }
     }
 
-  if (!no_log)
-    mOutputFile << "diary off" << endl;
-
   mOutputFile.close();
 
   if (hasModelChanged)

src/ModFile.hh

 /*
- * Copyright © 2006-2020 Dynare Team
+ * Copyright © 2006-2021 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -165,7 +165,7 @@ public:
     \param mingw Should the MEX command of use_dll be adapted for MinGW?
     \param compute_xrefs if true, equation cross references will be computed
   */
-  void writeOutputFiles(const string &basename, bool clear_all, bool clear_global, bool no_log, bool no_warn,
+  void writeOutputFiles(const string &basename, bool clear_all, bool clear_global, bool no_warn,
                         bool console, bool nograph, bool nointeractive, const ConfigFile &config_file,
                         bool check_model_changes, bool minimal_workspace, bool compute_xrefs,
                         const string &mexext, const filesystem::path &matlabroot,