Add --no-append-metadata in CLI and metadata.append in JSON

Skips appending metadata to the binary

libsolidity/interface/CompilerStack.cpp

@@ -308,6 +308,7 @@ void CompilerStack::reset(bool _keepSettings)
 		m_revertStrings = RevertStrings::Default;
 		m_optimiserSettings = OptimiserSettings::minimal();
 		m_metadataLiteralSources = false;
+		m_metadataFormat = defaultMetadataFormat();
 		m_metadataHash = MetadataHash::IPFS;
 		m_stopAfter = State::CompilationSuccessful;
 	}
@@ -1548,6 +1549,9 @@ string CompilerStack::createMetadata(Contract const& _contract, bool _forIR) con
 	if (m_revertStrings != RevertStrings::Default)
 		meta["settings"]["debug"]["revertStrings"] = revertStringsToString(m_revertStrings);
 
+	if (m_metadataFormat == MetadataFormat::NoMetadata)
+		meta["settings"]["metadata"]["appendCBOR"] = false;
+
 	if (m_metadataLiteralSources)
 		meta["settings"]["metadata"]["useLiteralContent"] = true;
 

libsolidity/interface/CompilerStack.h

@@ -349,6 +349,11 @@ public:
 	/// caused by differences in metadata. Should only be used for testing.
 	void setMetadataFormat(MetadataFormat _metadataFormat) { m_metadataFormat = _metadataFormat; }
 
+	static MetadataFormat defaultMetadataFormat()
+	{
+		return VersionIsRelease ? MetadataFormat::WithReleaseVersionTag : MetadataFormat::WithPrereleaseVersionTag;
+	}
+
 private:
 	/// The state per source unit. Filled gradually during parsing.
 	struct Source
@@ -515,7 +520,7 @@ private:
 	/// Whether or not there has been an error during processing.
 	/// If this is true, the stack will refuse to generate code.
 	bool m_hasError = false;
-	MetadataFormat m_metadataFormat = VersionIsRelease ? MetadataFormat::WithReleaseVersionTag : MetadataFormat::WithPrereleaseVersionTag;
+	MetadataFormat m_metadataFormat = defaultMetadataFormat();
 };
 
 }

libsolidity/interface/StandardCompiler.cpp

@@ -509,6 +509,8 @@ std::optional<Json::Value> checkMetadataKeys(Json::Value const& _input)
 {
 	if (_input.isObject())
 	{
+		if (_input.isMember("appendCBOR") && !_input["appendCBOR"].isBool())
+			return formatFatalError(Error::Type::JSONError, "\"settings.metadata.appendCBOR\" must be Boolean");
 		if (_input.isMember("useLiteralContent") && !_input["useLiteralContent"].isBool())
 			return formatFatalError(Error::Type::JSONError, "\"settings.metadata.useLiteralContent\" must be Boolean");
 
@@ -516,7 +518,7 @@ std::optional<Json::Value> checkMetadataKeys(Json::Value const& _input)
 		if (_input.isMember("bytecodeHash") && !hashes.count(_input["bytecodeHash"].asString()))
 			return formatFatalError(Error::Type::JSONError, "\"settings.metadata.bytecodeHash\" must be \"ipfs\", \"bzzr1\" or \"none\"");
 	}
-	static set<string> keys{"useLiteralContent", "bytecodeHash"};
+	static set<string> keys{"appendCBOR", "useLiteralContent", "bytecodeHash"};
 	return checkKeys(_input, keys, "settings.metadata");
 }
 
@@ -911,6 +913,12 @@ std::variant<StandardCompiler::InputsAndSettings, Json::Value> StandardCompiler:
 	if (auto result = checkMetadataKeys(metadataSettings))
 		return *result;
 
+	solAssert(CompilerStack::defaultMetadataFormat() != CompilerStack::MetadataFormat::NoMetadata, "");
+	ret.metadataFormat =
+		metadataSettings.get("appendCBOR", Json::Value(true)).asBool() ?
+		CompilerStack::defaultMetadataFormat() :
+		CompilerStack::MetadataFormat::NoMetadata;
+
 	ret.metadataLiteralSources = metadataSettings.get("useLiteralContent", Json::Value(false)).asBool();
 	if (metadataSettings.isMember("bytecodeHash"))
 	{
@@ -1086,6 +1094,7 @@ Json::Value StandardCompiler::compileSolidity(StandardCompiler::InputsAndSetting
 		compilerStack.selectDebugInfo(_inputsAndSettings.debugInfoSelection.value());
 	compilerStack.setLibraries(_inputsAndSettings.libraries);
 	compilerStack.useMetadataLiteralSources(_inputsAndSettings.metadataLiteralSources);
+	compilerStack.setMetadataFormat(_inputsAndSettings.metadataFormat);
 	compilerStack.setMetadataHash(_inputsAndSettings.metadataHash);
 	compilerStack.setRequestedContractNames(requestedContractNames(_inputsAndSettings.outputSelection));
 	compilerStack.setModelCheckerSettings(_inputsAndSettings.modelCheckerSettings);

libsolidity/interface/StandardCompiler.h

@@ -83,6 +83,7 @@ private:
 		std::optional<langutil::DebugInfoSelection> debugInfoSelection;
 		std::map<std::string, util::h160> libraries;
 		bool metadataLiteralSources = false;
+		CompilerStack::MetadataFormat metadataFormat = CompilerStack::defaultMetadataFormat();
 		CompilerStack::MetadataHash metadataHash = CompilerStack::MetadataHash::IPFS;
 		Json::Value outputSelection;
 		ModelCheckerSettings modelCheckerSettings = ModelCheckerSettings{};