Add --debug switch and enable debugging if it is on.

src/main.cpp

@@ -80,6 +80,11 @@ int main(int argc, char *argv[])
         return EXIT_FAILURE;
     }
 
+    if (opts.debug)
+    {
+        log::enable_debug();
+    }
+
     if (opts.help || opts.version)
     {
         return EXIT_SUCCESS;

src/options.cpp

@@ -88,6 +88,8 @@ options parse_options(int argc, char *argv[])
                    "following symlinks.") .str().data())
         ("ignore-archive-errors",
          translate("Ignore errors about wrong file formats.") .str().data())
+        ("debug",
+         translate("Enable debug output.") .str().data())
     ;
 
     po::options_description options_hidden("Hidden options");
@@ -226,6 +228,7 @@ options parse_again(const po::variables_map &vm)
     opts.recursive = vm.count("recursive") > 0;
     opts.dereference_recursive = vm.count("dereference-recursive") > 0;
     opts.ignore_archive_errors = vm.count("ignore-archive-errors") > 0;
+    opts.debug = vm.count("debug") > 0;
 
     if (vm.count("regexp") > 0)
     {

src/options.hpp

@@ -55,6 +55,7 @@ struct options
     bool dereference_recursive{false};
     std::vector<std::string> input_file;
     bool ignore_archive_errors{false};
+    bool debug{false};
 };
 
 //! Parse options and return them.