only save retroarch.cfg as diff from defaults

Author: warmenhoven

config.def.h

@@ -573,6 +573,9 @@
 /* Save configuration file on exit. */
 #define DEFAULT_CONFIG_SAVE_ON_EXIT true
 
+/* Save minimal configuration (only values that differ from defaults). */
+#define DEFAULT_CONFIG_SAVE_MINIMAL false
+
 /* Save active input remap file on exit/close content */
 #define DEFAULT_REMAP_SAVE_ON_EXIT true
 

configuration.c

@@ -1055,6 +1055,7 @@ typedef struct settings
       bool sort_savestates_by_content_enable;
       bool sort_screenshots_by_content_enable;
       bool config_save_on_exit;
+      bool config_save_minimal;
       bool remap_save_on_exit;
 
       bool show_hidden_files;

configuration.h

@@ -708,6 +708,10 @@ MSG_HASH(
    MENU_ENUM_LABEL_CONFIG_SAVE_ON_EXIT,
    "config_save_on_exit"
    )
+MSG_HASH(
+   MENU_ENUM_LABEL_CONFIG_SAVE_MINIMAL,
+   "config_save_minimal"
+   )
 MSG_HASH(
    MENU_ENUM_LABEL_REMAP_SAVE_ON_EXIT,
    "remap_save_on_exit"

intl/msg_hash_lbl.h

@@ -4756,6 +4756,18 @@ MSG_HASH(
    MENU_ENUM_LABEL_HELP_CONFIG_SAVE_ON_EXIT,
    "Save changes to the configuration file on exit. Useful for changes made in the menu. Overwrites the configuration file, #include's and comments are not preserved."
    )
+MSG_HASH(
+   MENU_ENUM_LABEL_VALUE_CONFIG_SAVE_MINIMAL,
+   "Save Minimal Configuration"
+   )
+MSG_HASH(
+   MENU_ENUM_SUBLABEL_CONFIG_SAVE_MINIMAL,
+   "Save only settings that differ from defaults."
+   )
+MSG_HASH(
+   MENU_ENUM_LABEL_HELP_CONFIG_SAVE_MINIMAL,
+   "When enabled, saves only configuration values that have changed from their default values. Results in a smaller, more manageable configuration file."
+   )
 MSG_HASH(
    MENU_ENUM_LABEL_VALUE_REMAP_SAVE_ON_EXIT,
    "Save Remap Files on Quit"

intl/msg_hash_us.h

@@ -533,6 +533,7 @@ DEFAULT_SUBLABEL_MACRO(action_bind_sublabel_video_hard_sync_frames,        MENU_
 DEFAULT_SUBLABEL_MACRO(action_bind_sublabel_video_threaded,                MENU_ENUM_SUBLABEL_VIDEO_THREADED)
 DEFAULT_SUBLABEL_MACRO(action_bind_sublabel_settings,                      MENU_ENUM_SUBLABEL_SETTINGS)
 DEFAULT_SUBLABEL_MACRO(action_bind_sublabel_config_save_on_exit,           MENU_ENUM_SUBLABEL_CONFIG_SAVE_ON_EXIT)
+DEFAULT_SUBLABEL_MACRO(action_bind_sublabel_config_save_minimal,           MENU_ENUM_SUBLABEL_CONFIG_SAVE_MINIMAL)
 DEFAULT_SUBLABEL_MACRO(action_bind_sublabel_remap_save_on_exit,            MENU_ENUM_SUBLABEL_REMAP_SAVE_ON_EXIT)
 DEFAULT_SUBLABEL_MACRO(action_bind_sublabel_configuration_settings_list,   MENU_ENUM_SUBLABEL_CONFIGURATION_SETTINGS)
 DEFAULT_SUBLABEL_MACRO(action_bind_sublabel_configurations_list_list,      MENU_ENUM_SUBLABEL_CONFIGURATIONS_LIST)
@@ -4981,6 +4982,9 @@ int menu_cbs_init_bind_sublabel(menu_file_list_cbs_t *cbs,
          case MENU_ENUM_LABEL_CONFIG_SAVE_ON_EXIT:
             BIND_ACTION_SUBLABEL(cbs, action_bind_sublabel_config_save_on_exit);
             break;
+         case MENU_ENUM_LABEL_CONFIG_SAVE_MINIMAL:
+            BIND_ACTION_SUBLABEL(cbs, action_bind_sublabel_config_save_minimal);
+            break;
          case MENU_ENUM_LABEL_REMAP_SAVE_ON_EXIT:
             BIND_ACTION_SUBLABEL(cbs, action_bind_sublabel_remap_save_on_exit);
             break;

menu/cbs/menu_cbs_sublabel.c

@@ -11540,6 +11540,7 @@ unsigned menu_displaylist_build_list(
          {
             static const menu_displaylist_build_info_t build_list[] = {
                {MENU_ENUM_LABEL_CONFIG_SAVE_ON_EXIT,        PARSE_ONLY_BOOL},
+               {MENU_ENUM_LABEL_CONFIG_SAVE_MINIMAL,        PARSE_ONLY_BOOL},
                {MENU_ENUM_LABEL_REMAP_SAVE_ON_EXIT,         PARSE_ONLY_BOOL},
                {MENU_ENUM_LABEL_GAME_SPECIFIC_OPTIONS,      PARSE_ONLY_BOOL},
                {MENU_ENUM_LABEL_AUTO_OVERRIDES_ENABLE,      PARSE_ONLY_BOOL},

menu/menu_displaylist.c

@@ -11119,7 +11119,7 @@ static bool setting_append_list(
       case SETTINGS_LIST_CONFIGURATION:
          {
             uint8_t i, listing = 0;
-            struct bool_entry bool_entries[9];
+            struct bool_entry bool_entries[10];
             START_GROUP(list, list_info, &group_info,
                   msg_hash_to_str(MENU_ENUM_LABEL_VALUE_CONFIGURATION_SETTINGS), parent_group);
 
@@ -11136,6 +11136,14 @@ static bool setting_append_list(
                bool_entries[listing].flags      |= SD_FLAG_DEFAULT_VALUE;
             listing++;
 
+            bool_entries[listing].target         = &settings->bools.config_save_minimal;
+            bool_entries[listing].name_enum_idx  = MENU_ENUM_LABEL_CONFIG_SAVE_MINIMAL;
+            bool_entries[listing].SHORT_enum_idx = MENU_ENUM_LABEL_VALUE_CONFIG_SAVE_MINIMAL;
+            bool_entries[listing].flags          = SD_FLAG_NONE;
+            if (DEFAULT_CONFIG_SAVE_MINIMAL)
+               bool_entries[listing].flags      |= SD_FLAG_DEFAULT_VALUE;
+            listing++;
+
             bool_entries[listing].target         = &settings->bools.show_hidden_files;
             bool_entries[listing].name_enum_idx  = MENU_ENUM_LABEL_SHOW_HIDDEN_FILES;
             bool_entries[listing].SHORT_enum_idx = MENU_ENUM_LABEL_VALUE_SHOW_HIDDEN_FILES;

menu/menu_setting.c

@@ -2618,6 +2618,7 @@ enum msg_hash_enums
    MENU_LBL_H(REPLAY_CHECKPOINT_INTERVAL),
    MENU_LBL_H(REPLAY_CHECKPOINT_DESERIALIZE),
    MENU_LBL_H(CONFIG_SAVE_ON_EXIT),
+   MENU_LBL_H(CONFIG_SAVE_MINIMAL),
    MENU_LABEL(REMAP_SAVE_ON_EXIT),
    MENU_LABEL(CONFIGURATION_LIST),
    MENU_LABEL(CONFIRM_ON_EXIT),