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-rw-r--r--src/test/settings_tests.cpp13
-rw-r--r--src/util/settings.cpp16
2 files changed, 22 insertions, 7 deletions
diff --git a/src/test/settings_tests.cpp b/src/test/settings_tests.cpp
index b0ee76ea6b..7e30fbcf68 100644
--- a/src/test/settings_tests.cpp
+++ b/src/test/settings_tests.cpp
@@ -45,6 +45,19 @@ BOOST_AUTO_TEST_CASE(Simple)
CheckValues(settings2, R"("val2")", R"(["val2","val3"])");
}
+// Confirm that a high priority setting overrides a lower priority setting even
+// if the high priority setting is null. This behavior is useful for a high
+// priority setting source to be able to effectively reset any setting back to
+// its default value.
+BOOST_AUTO_TEST_CASE(NullOverride)
+{
+ util::Settings settings;
+ settings.command_line_options["name"].push_back("value");
+ BOOST_CHECK_EQUAL(R"("value")", GetSetting(settings, "section", "name", false, false).write().c_str());
+ settings.forced_settings["name"] = {};
+ BOOST_CHECK_EQUAL(R"(null)", GetSetting(settings, "section", "name", false, false).write().c_str());
+}
+
// Test different ways settings can be merged, and verify results. This test can
// be used to confirm that updates to settings code don't change behavior
// unintentionally.
diff --git a/src/util/settings.cpp b/src/util/settings.cpp
index d20f509e24..e4979df755 100644
--- a/src/util/settings.cpp
+++ b/src/util/settings.cpp
@@ -56,6 +56,7 @@ SettingsValue GetSetting(const Settings& settings,
bool get_chain_name)
{
SettingsValue result;
+ bool done = false; // Done merging any more settings sources.
MergeSettings(settings, section, name, [&](SettingsSpan span, Source source) {
// Weird behavior preserved for backwards compatibility: Apply negated
// setting even if non-negated setting would be ignored. A negated
@@ -79,6 +80,8 @@ SettingsValue GetSetting(const Settings& settings,
// negated values, or at least warn they are ignored.
const bool skip_negated_command_line = get_chain_name;
+ if (done) return;
+
// Ignore settings in default config section if requested.
if (ignore_default_section_config && source == Source::CONFIG_FILE_DEFAULT_SECTION &&
!never_ignore_negated_setting) {
@@ -88,13 +91,12 @@ SettingsValue GetSetting(const Settings& settings,
// Skip negated command line settings.
if (skip_negated_command_line && span.last_negated()) return;
- // Stick with highest priority value, keeping result if already set.
- if (!result.isNull()) return;
-
if (!span.empty()) {
result = reverse_precedence ? span.begin()[0] : span.end()[-1];
+ done = true;
} else if (span.last_negated()) {
result = false;
+ done = true;
}
});
return result;
@@ -106,7 +108,7 @@ std::vector<SettingsValue> GetSettingsList(const Settings& settings,
bool ignore_default_section_config)
{
std::vector<SettingsValue> result;
- bool result_complete = false;
+ bool done = false; // Done merging any more settings sources.
bool prev_negated_empty = false;
MergeSettings(settings, section, name, [&](SettingsSpan span, Source source) {
// Weird behavior preserved for backwards compatibility: Apply config
@@ -125,7 +127,7 @@ std::vector<SettingsValue> GetSettingsList(const Settings& settings,
// Add new settings to the result if isn't already complete, or if the
// values are zombies.
- if (!result_complete || add_zombie_config_values) {
+ if (!done || add_zombie_config_values) {
for (const auto& value : span) {
if (value.isArray()) {
result.insert(result.end(), value.getValues().begin(), value.getValues().end());
@@ -136,8 +138,8 @@ std::vector<SettingsValue> GetSettingsList(const Settings& settings,
}
// If a setting was negated, or if a setting was forced, set
- // result_complete to true to ignore any later lower priority settings.
- result_complete |= span.negated() > 0 || source == Source::FORCED;
+ // done to true to ignore any later lower priority settings.
+ done |= span.negated() > 0 || source == Source::FORCED;
// Update the negated and empty state used for the zombie values check.
prev_negated_empty |= span.last_negated() && result.empty();