Disable 'interactive' options in :exec/:eval

Incremental search, automatic info and completion are
not needed in non interactive context.

src/commands.cc

@@ -955,6 +955,22 @@ void context_wrap(const ParametersParser& parser, Context& context, Func func)
             GlobalHooks::instance().enable_hooks();
     });
 
+    struct DisableOption {
+        DisableOption(Context& context, const char* name)
+            : m_option(context.options()[name]),
+              m_prev_value(m_option.get<bool>())
+        { m_option.set(false); }
+
+        ~DisableOption() { m_option.set(m_prev_value); }
+
+        Option& m_option;
+        bool m_prev_value;
+    };
+    DisableOption disable_autoinfo(context, "autoinfo");
+    DisableOption disable_autoshowcompl(context, "autoshowcompl");
+    DisableOption disable_incsearch(context, "incsearch");
+
+
     ClientManager& cm = ClientManager::instance();
     if (parser.has_option("buffer"))
     {

src/option_manager.cc

@@ -56,7 +56,7 @@ Option& OptionManager::get_local_option(const String& name)
 
 }
 
-const Option& OptionManager::operator[](const String& name) const
+Option& OptionManager::operator[](const String& name)
 {
     auto it = find_option(m_options, name);
     if (it != m_options.end())
@@ -67,6 +67,11 @@ const Option& OptionManager::operator[](const String& name) const
         throw option_not_found(name);
 }
 
+const Option& OptionManager::operator[](const String& name) const
+{
+    return const_cast<OptionManager&>(*this)[name];
+}
+
 template<typename MatchingFunc>
 CandidateList OptionManager::get_matching_names(MatchingFunc func)
 {

src/option_manager.hh

@@ -88,6 +88,7 @@ public:
     OptionManager(OptionManager& parent);
     ~OptionManager();
 
+    Option& operator[] (const String& name);
     const Option& operator[] (const String& name) const;
     Option& get_local_option(const String& name);