Enhancement

- Allow a separate color for error messages via the 'color.error'
  configuration variable.

src/Config.cpp

@@ -159,6 +159,7 @@ std::string Config::_defaults =
 #ifdef LINUX
   "color.header=color3                            # Color of header messages\n"
   "color.footnote=color3                          # Color of footnote messages\n"
+  "color.error=color3                             # Color of error messages\n"
   "color.debug=color3                             # Color of diagnostic output\n"
   "color.alternate=on color233                    # Alternate color for line coloring\n"
   "\n"
@@ -211,6 +212,7 @@ std::string Config::_defaults =
 #else
   "color.header=yellow                            # Color of header messages\n"
   "color.footnote=yellow                          # Color of footnote messages\n"
+  "color.error=yellow                             # Color of error messages\n"
   "color.debug=yellow                             # Color of diagnostic output\n"
   "color.alternate=                               # Alternate color for line coloring\n"
   "\n"

src/Context.cpp

@@ -345,7 +345,7 @@ int Context::run ()
   std::vector <std::string>::iterator e;
   for (e = errors.begin (); e != errors.end (); ++e)
     if (color ())
-      std::cerr << colorizeFootnote (*e) << "\n";
+      std::cerr << colorizeError (*e) << "\n";
     else
       std::cerr << *e << "\n";
 

src/commands/CmdShow.cpp

@@ -100,6 +100,7 @@ int CmdShow::execute (std::string& output)
     " color.deleted"
     " color.due"
     " color.due.today"
+    " color.error"
     " color.footnote"
     " color.header"
     " color.history.add"

src/main.h

@@ -55,6 +55,7 @@ void initializeColorRules ();
 void autoColorize (Task&, Color&);
 std::string colorizeHeader (const std::string&);
 std::string colorizeFootnote (const std::string&);
+std::string colorizeError (const std::string&);
 std::string colorizeDebug (const std::string&);
 
 // dependency.cpp

src/rules.cpp

@@ -356,6 +356,15 @@ std::string colorizeFootnote (const std::string& input)
   return input;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+std::string colorizeError (const std::string& input)
+{
+  if (gsColor["color.error"].nontrivial ())
+    return gsColor["color.error"].colorize (input);
+
+  return input;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 std::string colorizeDebug (const std::string& input)
 {